- Macropodia macrocheles — likely to require an intermediate donation
- Macropodia parva — likely to require an intermediate donation
- Macropodia rostrata — likely to require an intermediate donation
- Macropodia spinulosa — likely to require an intermediate donation
- Macropodia straeleni — likely to require an intermediate donation
- Macropodia tenuirostris — likely to require an intermediate donation
- Macropodia trigonus — likely to require an intermediate donation
- Macroregonia macrochira — likely to require an intermediate donation
- Macrostylis abyssalis — likely to require a low level of donation
- Macrostylis abyssicola — likely to require a low level of donation
- Macrostylis affinis — likely to require a low level of donation
- Macrostylis amaliae — likely to require a low level of donation
- Macrostylis amplinexa — likely to require a low level of donation
- Macrostylis angolensis — likely to require a low level of donation
- Macrostylis angulata — likely to require a low level of donation
- Macrostylis antennamagna — likely to require a low level of donation
- Macrostylis belyaevi — likely to require a low level of donation
- Macrostylis bifurcatus — likely to require a low level of donation
- Macrostylis bipunctatus — likely to require a low level of donation
- Macrostylis birsteini — likely to require a low level of donation
- Macrostylis capito — likely to require a low level of donation
- Macrostylis caribbicus — likely to require a low level of donation
- Macrostylis carinifera — likely to require a low level of donation
- Macrostylis cerritus — likely to require a low level of donation
- Macrostylis compactus — likely to require a low level of donation
- Macrostylis confinis — likely to require a low level of donation
- Macrostylis curticornis — likely to require a low level of donation
- Macrostylis daniae — likely to require a low level of donation
- Macrostylis dellacrocei — likely to require a low level of donation
- Macrostylis diatona — likely to require a low level of donation
- Macrostylis dorsaetosa — likely to require a low level of donation
- Macrostylis elongata — likely to require a low level of donation
- Macrostylis emarginata — likely to require a low level of donation
- Macrostylis expolita — likely to require a low level of donation
- Macrostylis foveata — likely to require a low level of donation
- Macrostylis fragosa — likely to require a low level of donation
- Macrostylis galatheae — likely to require a low level of donation
- Macrostylis gerdesi — likely to require a low level of donation
- Macrostylis gestuosa — likely to require a low level of donation
- Macrostylis grandis — likely to require a low level of donation
- Macrostylis hadalis — likely to require a low level of donation
- Macrostylis hirsuticaudis — likely to require a low level of donation
- Macrostylis lacunosa — likely to require a low level of donation
- Macrostylis latifrons — likely to require a low level of donation
- Macrostylis latiuscula — likely to require a low level of donation
- Macrostylis longifera — likely to require a low level of donation
- Macrostylis longipedis — likely to require a low level of donation
- Macrostylis longipes — likely to require a low level of donation
- Macrostylis longiremis — likely to require a low level of donation
- Macrostylis longispinis — likely to require a low level of donation
- Macrostylis longissima — likely to require a low level of donation
- Macrostylis longiuscula — likely to require a low level of donation
- Macrostylis longula — likely to require a low level of donation
- Macrostylis magnifica — likely to require a low level of donation
- Macrostylis mariana — likely to require a low level of donation
- Macrostylis marionae — likely to require a low level of donation
- Macrostylis matildae — likely to require a low level of donation
- Macrostylis medioxima — likely to require a low level of donation
- Macrostylis meteorae — likely to require a low level of donation
- Macrostylis minuscularia — likely to require a low level of donation
- Macrostylis minutus — likely to require a low level of donation
- Macrostylis ovata — likely to require a low level of donation
- Macrostylis papillata — likely to require a low level of donation
- Macrostylis pectorosa — likely to require a low level of donation
- Macrostylis polaris — likely to require a low level of donation
- Macrostylis porrecta — likely to require a low level of donation
- Macrostylis profundissima — likely to require a low level of donation
- Macrostylis prolixa — likely to require a low level of donation
- Macrostylis pumicosa — likely to require a low level of donation
- Macrostylis quadratura — likely to require a low level of donation
- Macrostylis rectangulata — likely to require a low level of donation
- Macrostylis reticulata — likely to require a low level of donation
- Macrostylis roaldi — likely to require a low level of donation
- Macrostylis robusta — likely to require a low level of donation
- Macrostylis sabinae — likely to require a low level of donation
- Macrostylis scotti — likely to require a low level of donation
- Macrostylis sensitiva — likely to require a low level of donation
- Macrostylis setifer — likely to require a low level of donation
- Macrostylis setulosa — likely to require a low level of donation
- Macrostylis spiniceps — likely to require a low level of donation
- Macrostylis spinifera — likely to require a low level of donation
- Macrostylis squalida — likely to require a low level of donation
- Macrostylis strigosa — likely to require a low level of donation
- Macrostylis subinermis — likely to require a low level of donation
- Macrostylis truncatex — likely to require a low level of donation
- Macrostylis tumulosa — likely to require a low level of donation
- Macrostylis uniformis — likely to require a low level of donation
- Macrostylis urceolata — likely to require a low level of donation
- Macrostylis vemae — likely to require a low level of donation
- Macrostylis vigorata — likely to require a low level of donation
- Macrostylis vinogradovae — likely to require a low level of donation
- Macrostylis viriosa — likely to require a low level of donation
- Macrostylis vitjazi — likely to require a low level of donation
- Macrostylis wolffi — likely to require a low level of donation
- Macrostylis zenkevitchi — likely to require a low level of donation
- Macrotelsonia strouhali — likely to require an intermediate donation
- Macrothea bouchardi — likely to require a low level of donation
- Madaeus mbalavuensis — likely to require a low level of donation
- Madaeus variabilis — likely to require a low level of donation
- Madagapotamon humberti — likely to require an intermediate donation
- Madangella altirostris — likely to require a low level of donation
- Madapisella madagascarensis — likely to require a low level of donation
- Madarateuchus vanderhorsii — likely to require a low level of donation
- Madeirasquilla tuerkayi — likely to require an intermediate donation
- Madoniscus termitis — likely to require an intermediate donation
- Madrasdillo elevatus — likely to require an intermediate donation
- Maera anoculata — likely to require a low level of donation
- Maera ascensionis — likely to require a low level of donation
- Maera bousfieldi — likely to require a low level of donation
- Maera danae — likely to require a low level of donation
- Maera edwardsi — likely to require a low level of donation
- Maera fusca — likely to require a low level of donation
- Maera grossimana — likely to require a low level of donation
- Maera hirondellei — likely to require a low level of donation
- Maera irregularis — likely to require a low level of donation
- Maera jerrica — likely to require a low level of donation
- Maera loveni — likely to require a low level of donation
- Maera lucinae — likely to require a low level of donation
- Maera nelsonae — likely to require a low level of donation
- Maera pachytelson — likely to require a low level of donation
- Maera pfefferi — likely to require a low level of donation
- Maera salmonea — likely to require a low level of donation
- Maera schieckei — likely to require a low level of donation
- Maera simile — likely to require a low level of donation
- Maera similis — likely to require a low level of donation
- Maera sodalis — likely to require a low level of donation
- Maera spinimana — likely to require a low level of donation
- Maera tenera — likely to require a low level of donation
- Maera umarae — likely to require a low level of donation
- Maeraceterus bramblensis — likely to require a low level of donation
- Maeraceterus taaroa — likely to require a low level of donation
- Maeracoota galani — likely to require a low level of donation
- Maeracoota tridentata — likely to require a low level of donation
- Maerella ledoyeri — likely to require a low level of donation
- Maerella tenuimana — likely to require a low level of donation
- Maerella westwoodi — likely to require a low level of donation
- Magellianira serrata — likely to require a low level of donation
- Maghrebidiella maroccana — likely to require a low level of donation
- Maghreboniscus minimus — likely to require an intermediate donation
- Maghreboniscus palmetensis — likely to require an intermediate donation
- Maghreboniscus trapezoidalis — likely to require an intermediate donation
- Magniezia africana — likely to require a low level of donation
- Magniezia gardei — likely to require a low level of donation
- Magniezia guinensis — likely to require a low level of donation
- Magniezia laticarpa — likely to require a low level of donation
- Magniezia studiosorum — likely to require a low level of donation
- Maguimithrax spinosissimus — likely to require an intermediate donation
- Mahatha adonis — likely to require an intermediate donation
- Mahatha helaya — likely to require an intermediate donation
- Mahatha iora — likely to require an intermediate donation
- Mahatha lacuna — likely to require an intermediate donation
- Mahatha ornatipes — likely to require an intermediate donation
- Mahatha regina — likely to require an intermediate donation
- Mahehia bicornis — likely to require an intermediate donation
- Mahehia laticauda — likely to require an intermediate donation
- Mahehia maculata — likely to require an intermediate donation
- Mainitia mainitensis — likely to require an intermediate donation
- Maiopsis panamensis — likely to require an intermediate donation
- Maja aquinado — likely to require an intermediate donation
- Maja arambourgi — likely to require an intermediate donation
- Maja armata — likely to require an intermediate donation
- Maja austriaca — likely to require an intermediate donation
- Maja biaensis — likely to require an intermediate donation
- Maja brachydactyla — likely to require an intermediate donation
- Maja cornuta — likely to require an intermediate donation
- Maja crispata — likely to require an intermediate donation
- Maja dominoleuae — likely to require an intermediate donation
- Maja hungarica — likely to require an intermediate donation
- Maja laddi — likely to require an intermediate donation
- Maja miocaenica — likely to require an intermediate donation
- Maja morii — likely to require an intermediate donation
- Maja orbigniana — likely to require an intermediate donation
- Maja oroszyi — likely to require an intermediate donation
- Maja robinsoni — likely to require an intermediate donation
- Maja squinado — likely to require an intermediate donation
- Maja tomidai — likely to require an intermediate donation
- Majella brevipes — likely to require an intermediate donation
- Majoxiphalus maximus — likely to require a low level of donation
- Makarasphaera amnicosa — likely to require a low level of donation
- Makassaritanais angustus — likely to require a low level of donation
- Makassaritanais bamberi — likely to require a low level of donation
- Makassaritanais itoi — likely to require a low level of donation
- Makassaritanais myorus — likely to require a low level of donation
- Makawe hurleyi — likely to require a low level of donation
- Makawe insularis — likely to require a low level of donation
- Makawe maynei — likely to require a low level of donation
- Makawe otamatuakeke — likely to require a low level of donation
- Makawe parva — likely to require a low level of donation
- Makawe waihekensis — likely to require a low level of donation
- Makraleptochelia potiguara — likely to require a low level of donation
- Makrokylindrus abyssalis — likely to require a low level of donation
- Makrokylindrus abyssi — likely to require a low level of donation
- Makrokylindrus acanthodes — likely to require a low level of donation
- Makrokylindrus aculeatus — likely to require a low level of donation
- Makrokylindrus aegaeus — likely to require a low level of donation
- Makrokylindrus alleni — likely to require a low level of donation
- Makrokylindrus americanus — likely to require a low level of donation
- Makrokylindrus anomalus — likely to require a low level of donation
- Makrokylindrus armatus — likely to require a low level of donation
- Makrokylindrus bacescui — likely to require a low level of donation
- Makrokylindrus baceskei — likely to require a low level of donation
- Makrokylindrus balinensis — likely to require a low level of donation
- Makrokylindrus basidentatus — likely to require a low level of donation
- Makrokylindrus bicornis — likely to require a low level of donation
- Makrokylindrus cinctus — likely to require a low level of donation
- Makrokylindrus cingulatus — likely to require a low level of donation
- Makrokylindrus costaricanus — likely to require a low level of donation
- Makrokylindrus costatus — likely to require a low level of donation
- Makrokylindrus declivifrons — likely to require a low level of donation
- Makrokylindrus deinotelson — likely to require a low level of donation
- Makrokylindrus dubius — likely to require a low level of donation
- Makrokylindrus duplosetosus — likely to require a low level of donation
- Makrokylindrus eirmoacanthus — likely to require a low level of donation
- Makrokylindrus erinaceus — likely to require a low level of donation
- Makrokylindrus fagei — likely to require a low level of donation
- Makrokylindrus fistularis — likely to require a low level of donation
- Makrokylindrus fragilis — likely to require a low level of donation
- Makrokylindrus gibraltariensis — likely to require a low level of donation
- Makrokylindrus hadalis — likely to require a low level of donation
- Makrokylindrus hessleri — likely to require a low level of donation
- Makrokylindrus hirsuta — likely to require a low level of donation
- Makrokylindrus hystrix — likely to require a low level of donation
- Makrokylindrus inermis — likely to require a low level of donation
- Makrokylindrus inscriptus — likely to require a low level of donation
- Makrokylindrus insignis — likely to require a low level of donation
- Makrokylindrus jedsi — likely to require a low level of donation
- Makrokylindrus josephinae — likely to require a low level of donation
- Makrokylindrus jubatus — likely to require a low level of donation
- Makrokylindrus lissus — likely to require a low level of donation
- Makrokylindrus lomakinae — likely to require a low level of donation
- Makrokylindrus longicaudatus — likely to require a low level of donation
- Makrokylindrus longipes — likely to require a low level of donation
- Makrokylindrus matsuei — likely to require a low level of donation
- Makrokylindrus menziesi — likely to require a low level of donation
- Makrokylindrus mersus — likely to require a low level of donation
- Makrokylindrus meteorae — likely to require a low level of donation
- Makrokylindrus micracanthus — likely to require a low level of donation
- Makrokylindrus monodi — likely to require a low level of donation
- Makrokylindrus mundus — likely to require a low level of donation
- Makrokylindrus myriamae — likely to require a low level of donation
- Makrokylindrus mystacinus — likely to require a low level of donation
- Makrokylindrus neptunius — likely to require a low level of donation
- Makrokylindrus nitens — likely to require a low level of donation
- Makrokylindrus omorii — likely to require a low level of donation
- Makrokylindrus paradivacumatus — likely to require a low level of donation
- Makrokylindrus paramonodi — likely to require a low level of donation
- Makrokylindrus paucidentatus — likely to require a low level of donation
- Makrokylindrus peresi — likely to require a low level of donation
- Makrokylindrus prolatus — likely to require a low level of donation
- Makrokylindrus renatae — likely to require a low level of donation
- Makrokylindrus reyssi — likely to require a low level of donation
- Makrokylindrus sandersi — likely to require a low level of donation
- Makrokylindrus semiechinata — likely to require a low level of donation
- Makrokylindrus serricauda — likely to require a low level of donation
- Makrokylindrus spinifer — likely to require a low level of donation
- Makrokylindrus spiniventris — likely to require a low level of donation
- Makrokylindrus stebbingi — likely to require a low level of donation
- Makrokylindrus stocki — likely to require a low level of donation
- Makrokylindrus striatus — likely to require a low level of donation
- Makrokylindrus totzkei — likely to require a low level of donation
- Makrokylindrus trisetosus — likely to require a low level of donation
- Makrokylindrus tuberculosus — likely to require a low level of donation
- Makrokylindrus tubulicauda — likely to require a low level of donation
- Makrokylindrus utinomii — likely to require a low level of donation
- Makrokylindrus vitiasi — likely to require a low level of donation
- Makrokylindrus wolffi — likely to require a low level of donation
- Malacanthura arabica — likely to require a low level of donation
- Malacanthura coronicauda — likely to require a low level of donation
- Malacanthura linguicauda — likely to require a low level of donation
- Malacanthura ornata — likely to require a low level of donation
- Malacanthura sanidoda — likely to require a low level of donation
- Malacanthura serenasinus — likely to require a low level of donation
- Malacanthura truncata — likely to require a low level of donation
- Malaccadillo jacobsoni — likely to require an intermediate donation
- Malacoplax californiensis — likely to require a low level of donation
- Malagasya antongilensis — likely to require an intermediate donation
- Malagasya goodmani — likely to require an intermediate donation
- Malayopotamon batak — likely to require an intermediate donation
- Malayopotamon brevimarginatum — likely to require an intermediate donation
- Malayopotamon gestroi — likely to require an intermediate donation
- Malayopotamon granulatum — likely to require an intermediate donation
- Malayopotamon granulosum — likely to require an intermediate donation
- Malayopotamon javaense — likely to require an intermediate donation
- Malayopotamon javanense — likely to require an intermediate donation
- Malayopotamon lipkei — likely to require an intermediate donation
- Malayopotamon similis — likely to require an intermediate donation
- Malayopotamon sumatrense — likely to require an intermediate donation
- Malayopotamon tobaense — likely to require an intermediate donation
- Malayopotamon turgeo — likely to require an intermediate donation
- Malayopotamon weh — likely to require an intermediate donation
- Maldivia plana — likely to require a low level of donation
- Maldivia symbiotica — likely to require a low level of donation
- Maleriopa dentifera — likely to require a low level of donation
- Mallacoota balara — likely to require a low level of donation
- Mallacoota barnardi — likely to require a low level of donation
- Mallacoota bulowara — likely to require a low level of donation
- Mallacoota caerulea — likely to require a low level of donation
- Mallacoota capricornia — likely to require a low level of donation
- Mallacoota carausui — likely to require a low level of donation
- Mallacoota chandaniae — likely to require a low level of donation
- Mallacoota diemenensis — likely to require a low level of donation
- Mallacoota euroka — likely to require a low level of donation
- Mallacoota insignis — likely to require a low level of donation
- Mallacoota kameruka — likely to require a low level of donation
- Mallacoota kunmunyah — likely to require a low level of donation
- Mallacoota latibrachioides — likely to require a low level of donation
- Mallacoota latibrachium — likely to require a low level of donation
- Mallacoota latidactylus — likely to require a low level of donation
- Mallacoota magnimerus — likely to require a low level of donation
- Mallacoota malua — likely to require a low level of donation
- Mallacoota maridwinae — likely to require a low level of donation
- Mallacoota misool — likely to require a low level of donation
- Mallacoota nananui — likely to require a low level of donation
- Mallacoota odontoplax — likely to require a low level of donation
- Mallacoota penelope — likely to require a low level of donation
- Mallacoota petriei — likely to require a low level of donation
- Mallacoota schellenbergi — likely to require a low level of donation
- Mallacoota scopulosa — likely to require a low level of donation
- Mallacoota sirius — likely to require a low level of donation
- Mallacoota sokotrae — likely to require a low level of donation
- Mallacoota subcarinata — likely to require a low level of donation
- Mallacoota subinsignis — likely to require a low level of donation
- Mallacoota unidentata — likely to require a low level of donation
- Mallacoota worimi — likely to require a low level of donation
- Malvinometopa porcellana — likely to require a low level of donation
- Manaxius ohsumiensis — likely to require a low level of donation
- Manaxius thailandensis — likely to require a low level of donation
- Mancasellus macrourus — likely to require a low level of donation
- Mancasellus macrurus — likely to require a low level of donation
- Mancicaris sinensis — likely to require a low level of donation
- Mancocuma altera — likely to require a low level of donation
- Mancocuma stellifera — likely to require a low level of donation
- Mandibulophoxus alaskensis — likely to require a low level of donation
- Mandibulophoxus gilesi — likely to require a low level of donation
- Mandibulophoxus hawaiiloa — likely to require a low level of donation
- Mandibulophoxus hongae — likely to require a low level of donation
- Mandibulophoxus hongue — likely to require a low level of donation
- Mandibulophoxus mai — likely to require a low level of donation
- Mandibulophoxus mayi — likely to require a low level of donation
- Mandibulophoxus stimpsoni — likely to require a low level of donation
- Mandibulophoxus uncirostratus — likely to require a low level of donation
- Manerogeneia maneroo — likely to require a low level of donation
- Mangkurtu kutjarra — likely to require a low level of donation
- Mangkurtu mityula — likely to require a low level of donation
- Manibia lata — likely to require an intermediate donation
- Manibia microps — likely to require an intermediate donation
- Manipontonia paeneglabra — likely to require a low level of donation
- Manipontonia persiana — likely to require a low level of donation
- Manipontonia psamathe — likely to require a low level of donation
- Manningia amabilis — likely to require an intermediate donation
- Manningia andamanensis — likely to require an intermediate donation
- Manningia arabica — likely to require an intermediate donation
- Manningia australiensis — likely to require an intermediate donation
- Manningia misool — likely to require an intermediate donation
- Manningia notialis — likely to require an intermediate donation
- Manningia pilaensis — likely to require an intermediate donation
- Manningia posteli — likely to require an intermediate donation
- Manningia raymondi — likely to require an intermediate donation
- Manningia wilsoni — likely to require an intermediate donation
- Manningia zehntneri — likely to require an intermediate donation
- Manningis arabicum — likely to require a low level of donation
- Mantacaprella macaronensis — likely to require a low level of donation
- Mantisgebia kyusyuensis — likely to require a low level of donation
- Mantisgebia multispinosa — likely to require a low level of donation
- Mantisgebia tuerkayi — likely to require a low level of donation
- Mantisgebia vonvaupeli — likely to require a low level of donation
- Manucomplanus cervicornis — likely to require a low level of donation
- Manucomplanus longimanus — likely to require a low level of donation
- Manucomplanus spinulosus — likely to require a low level of donation
- Manucomplanus ungulatus — likely to require a low level of donation
- Manucomplanus varians — likely to require a low level of donation
- Manuscaris acuminatus — likely to require a low level of donation
- Manuscaris liui — likely to require a low level of donation
- Maoridotea naylori — likely to require a low level of donation
- Maragopsis bidentata — likely to require a low level of donation
- Maragopsis obliquimanus — likely to require a low level of donation
- Marcolana delamarei — likely to require a low level of donation
- Marcusiaxius colpos — likely to require a low level of donation
- Marcusiaxius lemoscastroi — likely to require a low level of donation
- Marcusiaxius minutus — likely to require a low level of donation
- Marcusiaxius torbeni — likely to require a low level of donation
- Marcusiaxius wamsoi — likely to require a low level of donation
- Maresiella aldabrana — likely to require a low level of donation
- Maresiella barringtoniana — likely to require a low level of donation
- Maresiella brevicornis — likely to require a low level of donation
- Maresiella elongata — likely to require a low level of donation
- Maresiella indica — likely to require a low level of donation
- Maresiella polynesica — likely to require a low level of donation
- Maresiella samariensis — likely to require a low level of donation
- Margitonia insolitus — likely to require a low level of donation
- Margueritta sandyi — likely to require a low level of donation
- Margueritta sylviae — likely to require a low level of donation
- Marianaxius kroppi — likely to require a low level of donation
- Mariaplax anfracta — likely to require an intermediate donation
- Mariaplax aspera — likely to require an intermediate donation
- Mariaplax chenae — likely to require an intermediate donation
- Mariaplax cyrtophallus — likely to require an intermediate donation
- Mariaplax daviei — likely to require an intermediate donation
- Mariaplax exigua — likely to require an intermediate donation
- Mariaplax galaxeae — likely to require an intermediate donation
- Mariaplax granulifera — likely to require an intermediate donation
- Mariaplax hispida — likely to require an intermediate donation
- Mariaplax mica — likely to require an intermediate donation
- Mariaplax narusei — likely to require an intermediate donation
- Mariaplax ourabay — likely to require an intermediate donation
- Mariaplax pitrai — likely to require an intermediate donation
- Mariaplax propinqua — likely to require an intermediate donation
- Mariaplax secus — likely to require an intermediate donation
- Mariaplax sinensis — likely to require an intermediate donation
- Mariaplax streptophallus — likely to require an intermediate donation
- Mariaplax sundaica — likely to require an intermediate donation
- Maricoccus brucei — likely to require a low level of donation
- Marigidiella brasiliensis — likely to require a low level of donation
- Marigidiella crassipes — likely to require a low level of donation
- Marinobogidiella tyrrhenica — likely to require a low level of donation
- Marinogammarus atlanticus — likely to require a low level of donation
- Marinogammarus marinus — likely to require a low level of donation
- Marinogammarus stoerensis — likely to require a low level of donation
- Marinohyalella richardi — likely to require a low level of donation
- Marioniscus hachijoensis — likely to require an intermediate donation
- Marioniscus miyakensis — likely to require an intermediate donation
- Marioniscus spatulifrons — likely to require an intermediate donation
- Marmachius fortunae — likely to require an intermediate donation
- Marocolana delamarei — likely to require a low level of donation
- Marojejy longimerus — likely to require an intermediate donation
- Marosina brevirostris — likely to require a low level of donation
- Marosina longirostris — likely to require a low level of donation
- Marratha angusta — likely to require a low level of donation
- Martensia levistriata — likely to require a low level of donation
- Martensia martensi — likely to require a low level of donation
- Martensia monozonata — likely to require a low level of donation
- Martensia nyiroensis — likely to require a low level of donation
- Martiana clausa — likely to require an intermediate donation
- Marumomysis antarctica — likely to require a low level of donation
- Marumomysis hakuhoae — likely to require a low level of donation
- Maryprocessa pippinae — likely to require a low level of donation
- Mastigochirus gracilis — likely to require a low level of donation
- Mastigochirus quadrilobatus — likely to require a low level of donation
- Mastigoniscus andeepi — likely to require a low level of donation
- Mastigoniscus concavus — likely to require a low level of donation
- Mastigoniscus elegans — likely to require a low level of donation
- Mastigoniscus generalis — likely to require a low level of donation
- Mastigoniscus gratissimus — likely to require a low level of donation
- Mastigoniscus gratus — likely to require a low level of donation
- Mastigoniscus latus — likely to require a low level of donation
- Mastigoniscus microcephalus — likely to require a low level of donation
- Mastigoniscus pistus — likely to require a low level of donation
- Mastigoniscus platovatus — likely to require a low level of donation
- Mastigoniscus polygomphios — likely to require a low level of donation
- Mastigoniscus pseudoelegans — likely to require a low level of donation
- Mastigoniscus stenocephalus — likely to require a low level of donation
- Matazonellus eglisi — likely to require an intermediate donation
- Matazonellus turquinensis — likely to require an intermediate donation
- Mathamelita aequicaudata — likely to require a low level of donation
- Mathildella kyushupalauensis — likely to require a low level of donation
- Mathildella maxima — likely to require a low level of donation
- Mathildella mclayi — likely to require a low level of donation
- Mathildella rubra — likely to require a low level of donation
- Mathildella serrata — likely to require a low level of donation
- Matong matong — likely to require a low level of donation
- Matuta annulifera — likely to require a low level of donation
- Matuta circulifera — likely to require a low level of donation
- Matuta planipes — likely to require a low level of donation
- Matuta purnama — likely to require a low level of donation
- Matuta victor — likely to require a low level of donation
- Matuta victrix — likely to require a low level of donation
- Maxilliphimedia longipes — likely to require a low level of donation
- Maxillipides laticarpus — likely to require a low level of donation
- Maxillipius commensalis — likely to require a low level of donation
- Maxillipius rectitelson — likely to require a low level of donation
- Maximiliaeus odoceros — likely to require a low level of donation
- Mayaweckelia cenoticola — likely to require a low level of donation
- Mayaweckelia troglomorpha — likely to require a low level of donation
- Mayaweckelia yucatanensis — likely to require a low level of donation
- Maydelliathelphusa edentula — likely to require an intermediate donation
- Maydelliathelphusa falcidigitis — likely to require an intermediate donation
- Maydelliathelphusa harpax — likely to require an intermediate donation
- Maydelliathelphusa lugubris — likely to require an intermediate donation
- Maydelliathelphusa masoniana — likely to require an intermediate donation
- Mayerella acanthopoda — likely to require a low level of donation
- Mayerella banksia — likely to require a low level of donation
- Mayerella limicola — likely to require a low level of donation
- Mayerella magellanica — likely to require a low level of donation
- Mayerella redunca — likely to require a low level of donation
- Mayerella sittropiae — likely to require a low level of donation
- Mayericaprella arimotoi — likely to require a low level of donation
- Mclaydromia colini — likely to require an intermediate donation
- Mclaydromia dubia — likely to require an intermediate donation
- Mebeli michaelseni — likely to require a low level of donation
- Medaeops edwardsi — likely to require a low level of donation
- Medaeops gemini — likely to require a low level of donation
- Medaeops granulosus — likely to require a low level of donation
- Medaeops megamiensis — likely to require a low level of donation
- Medaeops merodontos — likely to require a low level of donation
- Medaeops neglectus — likely to require a low level of donation
- Medaeops potens — likely to require a low level of donation
- Medaeops serenei — likely to require a low level of donation
- Medaeus aztec — likely to require a low level of donation
- Medaeus danielita — likely to require a low level of donation
- Medaeus dubius — likely to require a low level of donation