- Westwoodilla helle — likely to require a low level of donation
- Westwoodilla longidactyla — likely to require a low level of donation
- Westwoodilla longimana — likely to require a low level of donation
- Westwoodilla manta — likely to require a low level of donation
- Westwoodilla megalops — likely to require a low level of donation
- Westwoodilla oxyrhyncha — likely to require a low level of donation
- Westwoodilla rectangulata — likely to require a low level of donation
- Westwoodilla rectirostris — likely to require a low level of donation
- Westwoodilla tone — likely to require a low level of donation
- Weyprechtia heuglini — likely to require a low level of donation
- Weyprechtia pinguis — likely to require a low level of donation
- Whangarusa translucens — likely to require a low level of donation
- Whiteleggia multicarinata — likely to require a low level of donation
- Whiteleggia stephensoni — likely to require a low level of donation
- Whoia angusta — likely to require a low level of donation
- Whoia dumbshafensis — likely to require a low level of donation
- Whoia sockei — likely to require a low level of donation
- Whoia variabilis — likely to require a low level of donation
- Whoia victoriensis — likely to require a low level of donation
- Wildus andamanensis — likely to require a low level of donation
- Wildus mullokus — likely to require a low level of donation
- Wildus parathambaroo — likely to require a low level of donation
- Wildus spinitelson — likely to require a low level of donation
- Wildus thamberoo — likely to require a low level of donation
- Willemoesia forceps — likely to require a low level of donation
- Willemoesia inornata — likely to require a low level of donation
- Willemoesia leptodactyla — likely to require a low level of donation
- Willemoesia pacifica — likely to require a low level of donation
- Williamstimpsonia denticulatus — likely to require a low level of donation
- Williamstimpsonia stimpsoni — likely to require a low level of donation
- Wimvadocus torelli — likely to require a low level of donation
- Wolffogebia annandalei — likely to require a low level of donation
- Wolffogebia giralia — likely to require a low level of donation
- Wolffogebia heterocheir — likely to require a low level of donation
- Wolffogebia inermis — likely to require a low level of donation
- Wolffogebia nhatrangensis — likely to require a low level of donation
- Wolffogebia phuketensis — likely to require a low level of donation
- Wombalano basilatissima — likely to require a low level of donation
- Wombalano rachayai — likely to require a low level of donation
- Wombalano yerang — likely to require a low level of donation
- Wombeyanus botulosus — likely to require a low level of donation
- Wonga wonga — likely to require a low level of donation
- Xaiva bachmayeri — likely to require a low level of donation
- Xaiva biguttata — likely to require a low level of donation
- Xaiva mcleayi — likely to require a low level of donation
- Xaiva pulchella — likely to require a low level of donation
- Xangoniscus aganju — likely to require an intermediate donation
- Xangoniscus itacarambiensis — likely to require an intermediate donation
- Xangoniscus odara — likely to require an intermediate donation
- Xanthasia murigera — likely to require a low level of donation
- Xanthias canaliculatus — likely to require a low level of donation
- Xanthias cherbonnieri — likely to require a low level of donation
- Xanthias dawsoni — likely to require a low level of donation
- Xanthias elegans — likely to require a low level of donation
- Xanthias gilbertensis — likely to require a low level of donation
- Xanthias glabrous — likely to require a low level of donation
- Xanthias inornatus — likely to require a low level of donation
- Xanthias joanneae — likely to require a low level of donation
- Xanthias lamarckii — likely to require a low level of donation
- Xanthias latifrons — likely to require a low level of donation
- Xanthias lenolensis — likely to require a low level of donation
- Xanthias lividus — likely to require a low level of donation
- Xanthias maculatus — likely to require a low level of donation
- Xanthias margaritata — likely to require a low level of donation
- Xanthias miocenicus — likely to require a low level of donation
- Xanthias nitidulus — likely to require a low level of donation
- Xanthias oahuensis — likely to require a low level of donation
- Xanthias punctatus — likely to require a low level of donation
- Xanthias similis — likely to require a low level of donation
- Xanthias sinensis — likely to require a low level of donation
- Xanthias teres — likely to require a low level of donation
- Xanthias toberculidens — likely to require a low level of donation
- Xanthion spadix — likely to require a low level of donation
- Xantho acutispinis — likely to require a low level of donation
- Xantho agassizi — likely to require a low level of donation
- Xantho edwardsi — likely to require a low level of donation
- Xantho edwardsii — likely to require a low level of donation
- Xantho granulicarpus — likely to require a low level of donation
- Xantho hydrophilus — likely to require a low level of donation
- Xantho lamelliger — likely to require a low level of donation
- Xantho lovisatoi — likely to require a low level of donation
- Xantho pilipes — likely to require a low level of donation
- Xantho poressa — likely to require a low level of donation
- Xantho sexdentatus — likely to require a low level of donation
- Xantho tahitiensis — likely to require a low level of donation
- Xantho vitiensis — likely to require a low level of donation
- Xanthodius cooksoni — likely to require a low level of donation
- Xanthodius inaequalis — likely to require a low level of donation
- Xanthodius kambaraensis — likely to require a low level of donation
- Xanthodius parvulus — likely to require a low level of donation
- Xanthodius sternberghii — likely to require a low level of donation
- Xanthopsis africana — likely to require a low level of donation
- Xanthopsis brasiliana — likely to require a low level of donation
- Xanthopsis cretacea — likely to require a low level of donation
- Xanthopsis multispinosa — likely to require a low level of donation
- Xanthopsis rathbunae — likely to require a low level of donation
- Xanthopsis sonthofenensis — likely to require a low level of donation
- Xeinostoma antiqua — likely to require an intermediate donation
- Xeinostoma eucheir — likely to require an intermediate donation
- Xeinostoma inopinatum — likely to require an intermediate donation
- Xeinostoma richeri — likely to require an intermediate donation
- Xeinostoma sakaii — likely to require an intermediate donation
- Xenacanthomysis pseudomacropsis — likely to require a low level of donation
- Xenanthura bacescui — likely to require a low level of donation
- Xenanthura brevitelson — likely to require a low level of donation
- Xenanthura conchae — likely to require a low level of donation
- Xenanthura orientalis — likely to require a low level of donation
- Xenanthura sinaica — likely to require a low level of donation
- Xenanthura ulawa — likely to require a low level of donation
- Xenanthura victoriae — likely to require a low level of donation
- Xenarcturus spinulosus — likely to require a low level of donation
- Xenocarcinus conicus — likely to require an intermediate donation
- Xenocarcinus depressus — likely to require an intermediate donation
- Xenocarcinus esakii — likely to require an intermediate donation
- Xenocarcinus longicornis — likely to require an intermediate donation
- Xenocarcinus monoceros — likely to require an intermediate donation
- Xenocarcinus truncalifrons — likely to require an intermediate donation
- Xenocarcinus truncatifrons — likely to require an intermediate donation
- Xenocarcinus tuberculatus — likely to require an intermediate donation
- Xenocheira fasciata — likely to require a low level of donation
- Xenocheira leptocheira — likely to require a low level of donation
- Xenocheira longisetosa — likely to require a low level of donation
- Xenocheira pirloti — likely to require a low level of donation
- Xenocrate peculiaris — likely to require a low level of donation
- Xenodice frauenfeldti — likely to require a low level of donation
- Xenodice portuguesi — likely to require a low level of donation
- Xenograpsus ngatama — likely to require a low level of donation
- Xenograpsus novaeinsularis — likely to require a low level of donation
- Xenograpsus testudinatus — likely to require a low level of donation
- Xenophthalmodes brachyphallus — likely to require an intermediate donation
- Xenophthalmodes dolichophallus — likely to require an intermediate donation
- Xenophthalmodes moebii — likely to require an intermediate donation
- Xenophthalmodes morsei — likely to require an intermediate donation
- Xenophthalmodes semicylindrus — likely to require an intermediate donation
- Xenophthalmus pinnotheroides — likely to require a low level of donation
- Xenophthalmus subitus — likely to require a low level of donation
- Xenophthalmus wolffi — likely to require a low level of donation
- Xenosella coxospinosa — likely to require a low level of donation
- Xenosinelobus balanocolus — likely to require a low level of donation
- Xenuraega ptilocera — likely to require a low level of donation
- Xeplenois anemos — likely to require a low level of donation
- Xeroniscus angusticauda — likely to require an intermediate donation
- Xeroniscus bicoloratus — likely to require an intermediate donation
- Xeroniscus brevicaudatus — likely to require an intermediate donation
- Xeroniscus erythraeus — likely to require an intermediate donation
- Xeroniscus nogalensis — likely to require an intermediate donation
- Xeroniscus penicilliger — likely to require an intermediate donation
- Xeroniscus siegfriedhuberi — likely to require an intermediate donation
- Xeroniscus sulcatus — likely to require an intermediate donation
- Xeroniscus troglophilus — likely to require an intermediate donation
- Xeroporcellio pandazisi — likely to require an intermediate donation
- Xeruca formosensis — likely to require a low level of donation
- Xestodillo lifouensis — likely to require an intermediate donation
- Xestodillo politus — likely to require an intermediate donation
- Xestodillo zebricolor — likely to require an intermediate donation
- Xestopilumnus cultripollex — likely to require an intermediate donation
- Xigonus patagoniensis — likely to require a low level of donation
- Xiphocaridinella ablaskiri — likely to require a low level of donation
- Xiphocaridinella dbari — likely to require a low level of donation
- Xiphocaridinella fagei — likely to require a low level of donation
- Xiphocaridinella jusbaschjani — likely to require a low level of donation
- Xiphocaridinella motena — likely to require a low level of donation
- Xiphocaridinella osterloffi — likely to require a low level of donation
- Xiphocaridinella otapi — likely to require a low level of donation
- Xiphocaridinella shurubumu — likely to require a low level of donation
- Xiphocaris elongata — likely to require a low level of donation
- Xiphocaris gomezi — likely to require a low level of donation
- Xiphonectes aculeatus — likely to require a low level of donation
- Xiphonectes bidens — likely to require a low level of donation
- Xiphonectes brockii — likely to require a low level of donation
- Xiphonectes macrophthalmus — likely to require a low level of donation
- Xiphonectes tuerkayi — likely to require a low level of donation
- Xiphoniscus adisi — likely to require an intermediate donation
- Xiphoniscus mirabilis — likely to require an intermediate donation
- Xiphopenaeus kroyeri — likely to require a low level of donation
- Xiphopenaeus riveti — likely to require a low level of donation
- Xlumnus nhatrangensis — likely to require an intermediate donation
- Xylocheles macrops — likely to require a low level of donation
- Xylocheles miersi — likely to require a low level of donation
- Xylolana radicicola — likely to require a low level of donation
- Xylopagurus anthonii — likely to require a low level of donation
- Xylopagurus caledonicus — likely to require a low level of donation
- Xylopagurus cancellarius — likely to require a low level of donation
- Xylopagurus philippinensis — likely to require a low level of donation
- Xylopagurus rectus — likely to require a low level of donation
- Xylopagurus tayrona — likely to require a low level of donation
- Xylopagurus tenuis — likely to require a low level of donation
- Xynomaia boissoni — likely to require a low level of donation
- Xynomaia sheni — likely to require a low level of donation
- Xynomaia verrilli — likely to require a low level of donation
- Xynosphaera colemani — likely to require a low level of donation
- Xystriogidiella capricornea — likely to require a low level of donation
- Xystriogidiella juliani — likely to require a low level of donation
- Xystriogidiella spathulata — likely to require a low level of donation
- Yacana ventania — likely to require a low level of donation
- Yaerikima kartaboana — likely to require an intermediate donation
- Yagerocaris cozumel — likely to require a low level of donation
- Yaldwynopsis guinotae — likely to require an intermediate donation
- Yaldwynopsis hawaiiana — likely to require an intermediate donation
- Yaldwynopsis saguili — likely to require an intermediate donation
- Yaldwynopsis spinimana — likely to require an intermediate donation
- Yammacoona kunarella — likely to require a low level of donation
- Yan errichus — likely to require a low level of donation
- Yan tiendi — likely to require a low level of donation
- Yarepotamon breviflagellum — likely to require an intermediate donation
- Yarepotamon fossor — likely to require an intermediate donation
- Yarepotamon gracilipa — likely to require an intermediate donation
- Yarepotamon gracillipa — likely to require an intermediate donation
- Yarepotamon meridianum — likely to require an intermediate donation
- Yarra unguiserra — likely to require a low level of donation
- Yemenicaris trullicauda — likely to require a low level of donation
- Yhi yindi — likely to require a low level of donation
- Yilgarniella sturtensis — likely to require a low level of donation
- Yogmelina brachyura — likely to require a low level of donation
- Yogmelina cocolita — likely to require a low level of donation
- Yogmelina laeviuscula — likely to require a low level of donation
- Yogmelina limana — likely to require a low level of donation
- Yogmelina ovata — likely to require a low level of donation
- Yongjicaris zhejiangensis — likely to require a low level of donation
- Yucatalana robustispina — likely to require a low level of donation
- Yuebeipotamon calciatile — likely to require an intermediate donation
- Yulia yuli — likely to require a low level of donation
- Yulumara armadillicta — likely to require a low level of donation
- Yulumara dentata — likely to require a low level of donation
- Yulumara improvisa — likely to require a low level of donation
- Yulumara tricuspis — likely to require a low level of donation
- Yulumara wallangar — likely to require a low level of donation
- Yunnanopalinura schrami — likely to require a low level of donation
- Yurrokus cooroo — likely to require a low level of donation
- Zaikometopa erythrophthalmus — likely to require a low level of donation
- Zalasius dromiaeformis — likely to require a low level of donation
- Zalasius sakaii — likely to require a low level of donation
- Zaops geddesi — likely to require a low level of donation
- Zaops ostreus — likely to require a low level of donation
- Zaramilla kergueleni — likely to require a low level of donation
- Zaraza linda — likely to require a low level of donation
- Zarenkolambrus epibranchialis — likely to require a low level of donation
- Zarenkolambrus minutus — likely to require a low level of donation
- Zariquieyon inflatus — likely to require a low level of donation
- Zebrascia buddelundi — likely to require an intermediate donation
- Zebrascia longicornis — likely to require an intermediate donation
- Zebrascia plurimaculata — likely to require an intermediate donation
- Zebrida adamsii — likely to require an intermediate donation
- Zebrida brevicarinata — likely to require an intermediate donation
- Zebrida longispina — likely to require an intermediate donation
- Zebridonus mirabilis — likely to require an intermediate donation
- Zehntneriana amakusae — likely to require an intermediate donation
- Zehntneriana miyakei — likely to require an intermediate donation
- Zehntneriana novaeinsulicola — likely to require an intermediate donation
- Zehntneriana serrata — likely to require an intermediate donation
- Zehntneriana tadafumii — likely to require an intermediate donation
- Zehntneriana villosa — likely to require an intermediate donation
- Zenkevitchia admirabilis — likely to require a low level of donation
- Zenkevitchia revazi — likely to require a low level of donation
- Zenkevitchia sandroruffoi — likely to require a low level of donation
- Zenkevitchia yakovi — likely to require a low level of donation
- Zenobianopsis caeca — likely to require a low level of donation
- Zenobianopsis cidaris — likely to require a low level of donation
- Zenobianopsis rotundicauda — likely to require a low level of donation
- Zenocuma rugosum — likely to require a low level of donation
- Zenopontonia noverca — likely to require a low level of donation
- Zenopontonia rex — likely to require a low level of donation
- Zenopontonia soror — likely to require a low level of donation
- Zernovia volgensis — likely to require a low level of donation
- Zeuxo amiti — likely to require a low level of donation
- Zeuxo andaminimus — likely to require a low level of donation
- Zeuxo angua — likely to require a low level of donation
- Zeuxo belli — likely to require a low level of donation
- Zeuxo beringi — likely to require a low level of donation
- Zeuxo bimbache — likely to require a low level of donation
- Zeuxo cloacarattus — likely to require a low level of donation
- Zeuxo coralensis — likely to require a low level of donation
- Zeuxo coturnix — likely to require a low level of donation
- Zeuxo edgari — likely to require a low level of donation
- Zeuxo exsargasso — likely to require a low level of donation
- Zeuxo fresii — likely to require a low level of donation
- Zeuxo gracilis — likely to require a low level of donation
- Zeuxo holdichi — likely to require a low level of donation
- Zeuxo kermadecensis — likely to require a low level of donation
- Zeuxo kirkmani — likely to require a low level of donation
- Zeuxo koreaensis — likely to require a low level of donation
- Zeuxo kurilensis — likely to require a low level of donation
- Zeuxo marmoratus — likely to require a low level of donation
- Zeuxo mooneyi — likely to require a low level of donation
- Zeuxo nannioggae — likely to require a low level of donation
- Zeuxo normani — likely to require a low level of donation
- Zeuxo novaezealandiae — likely to require a low level of donation
- Zeuxo odohertyae — likely to require a low level of donation
- Zeuxo phytalensis — likely to require a low level of donation
- Zeuxo russi — likely to require a low level of donation
- Zeuxo seurati — likely to require a low level of donation
- Zeuxo shepherdi — likely to require a low level of donation
- Zeuxo shitipingensis — likely to require a low level of donation
- Zeuxo simonsiensis — likely to require a low level of donation
- Zeuxo spina — likely to require a low level of donation
- Zeuxo tenuicornis — likely to require a low level of donation
- Zeuxo turkensis — likely to require a low level of donation
- Zeuxo vanhoeffeni — likely to require a low level of donation
- Zeuxo Westwoodiana — likely to require a low level of donation
- Zeuxo westwoodiana — likely to require a low level of donation
- Zeuxo zorro — likely to require a low level of donation
- Zeuxoides aka — likely to require a low level of donation
- Zeuxoides casanunda — likely to require a low level of donation
- Zeuxoides helleri — likely to require a low level of donation
- Zeuxoides lasti — likely to require a low level of donation
- Zeuxoides lauriebourqueae — likely to require a low level of donation
- Zeuxoides mawbeyi — likely to require a low level of donation
- Zeuxoides ohlini — likely to require a low level of donation
- Zeuxoides pseudolitoralis — likely to require a low level of donation
- Zeuxoides rapaitii — likely to require a low level of donation
- Zeuxoides rimuwhero — likely to require a low level of donation
- Zeuxoides spongicola — likely to require a low level of donation
- Zeuxoides troncosoi — likely to require a low level of donation
- Zeuxokoma alphei — likely to require a low level of donation
- Zeuxokoma elogata — likely to require a low level of donation
- Zeuxokoma elongata — likely to require a low level of donation
- Zeuxokoma glabra — likely to require a low level of donation
- Zeuxokoma luetzeni — likely to require a low level of donation
- Zeuxokoma musaeformis — likely to require a low level of donation
- Zeuxokoma setosa — likely to require a low level of donation
- Zhadia subantarctica — likely to require a low level of donation
- Zibrovia galea — likely to require a low level of donation
- Zilchiopsis chacei — likely to require a low level of donation
- Zilchiopsis collastinensis — likely to require a low level of donation
- Zilchiopsis cryptoda — likely to require a low level of donation
- Zilchiopsis oronensis — likely to require a low level of donation
- Zimmeriana azumai — likely to require a low level of donation
- Zimmeriana lasiodactylum — likely to require a low level of donation
- Zimmeriana longirostris — likely to require a low level of donation
- Zimmeriana robustacrus — likely to require a low level of donation
- Zimmeriana spinicauda — likely to require a low level of donation
- Zimmeriana vibrissa — likely to require a low level of donation
- Zizzygonium magellanensis — likely to require a low level of donation
- Zobracho canguro — likely to require a low level of donation
- Zoedeutopus cinaloanus — likely to require a low level of donation
- Zoedeutopus cinaloensis — likely to require a low level of donation
- Zoidbergus abyssalis — likely to require a low level of donation
- Zoidbergus lagenirostris — likely to require a low level of donation
- Zoidbergus paragracilis — likely to require a low level of donation
- Zoidbergus tenuimanus — likely to require a low level of donation
- Zoidbergus tenuis — likely to require a low level of donation
- Zoidbergus vicinus — likely to require a low level of donation
- Zombiweckelia parvipalpus — likely to require a low level of donation
- Zonophryxus dodecapus — likely to require a low level of donation
- Zonophryxus grimaldii — likely to require a low level of donation
- Zonophryxus quinquedens — likely to require a low level of donation
- Zonophryxus retrodens — likely to require a low level of donation
- Zonophryxus similis — likely to require a low level of donation
- Zonophryxus trilobus — likely to require a low level of donation
- Zoromunna setifrons — likely to require a low level of donation
- Zosimus actaeoides — likely to require a low level of donation
- Zosimus aeneus — likely to require a low level of donation
- Zosimus fissa — likely to require a low level of donation
- Zosimus hawaiiensis — likely to require a low level of donation
- Zosimus jeneweni — likely to require a low level of donation
- Zosimus laevis — likely to require a low level of donation
- Zosimus maculatus — likely to require a low level of donation
- Zosimus poxus — likely to require a low level of donation
- Zosimus sculptus — likely to require a low level of donation
- Zozymodes cavipes — likely to require a low level of donation
- Zozymodes pumilus — likely to require a low level of donation
- Zozymodes sculptus — likely to require a low level of donation
- Zozymodes xanthoides — likely to require a low level of donation
- Zulialana coalescens — likely to require a low level of donation
- Zuzara curtispina — likely to require a low level of donation
- Zuzara diadema — likely to require a low level of donation
- Zuzara digitata — likely to require a low level of donation
- Zuzara furcifer — likely to require a low level of donation
- Zuzara semipunctata — likely to require a low level of donation
- Zuzara venosa — likely to require a low level of donation
- Zygomaera aequimana — likely to require a low level of donation
- Zygomaera emarginata — likely to require a low level of donation
- Zygomaera eugeniae — likely to require a low level of donation
- Zygomaera gloriosae — likely to require a low level of donation
- Zygomaera pedonculata — likely to require a low level of donation
- Zygomaera pfefferi — likely to require a low level of donation
- Zygomaera suasoris — likely to require a low level of donation
- Zygopa michaelis — likely to require a low level of donation
- Zygosiphon mortenseni — likely to require a low level of donation
- Gammarus heteroclitus — likely to require a low level of donation