Base of the evolutionary tree for Holasteroida

← parent

• Holasteroida (55 species)
  • Pourtalesiidae → (30 species)
    • Pourtalesia → (11 species)
      • Pourtalesia aurorae
      • Pourtalesia laguncula
      • Pourtalesia tanneri
      • Pourtalesia hispida
      • Pourtalesia heptneri
      • Pourtalesia jeffreysi
      • Pourtalesia miranda
      • Pourtalesia alcocki
      • Pourtalesia thomsoni
      • Pourtalesia vinogradovae
      • Pourtalesia debilis
    • Echinosigra → (8 species)
      • Echinogutta → (4 species)
        • Echinosigra fabrefacta
        • Echinosigra amphora
        • Echinosigra valvaedentata
        • Echinosigra antarctica
      • Echinosigra subgenus Echinosigra → (4 species)
        • Echinosigra porrecta
        • Echinosigra phiale
        • Echinosigra vityazi
        • Echinosigra mortenseni
    • Ceratophysa → (3 species)
      • Ceratophysa rosea
      • Ceratophysa ceratopyga
      • Ceratophysa valvaecristata
    • Echinocrepis → (3 species)
      • Echinocrepis cuneata
      • Echinocrepis rostrata
      • Echinocrepis gracilis
    • Solenocystis imitans
    • Helgocystis carinata
    • Rictocystis jensenae
    • Cystocrepis setigera
    • Spatagocystis challengeri
  • Urechinina → (25 species)
    • Plexechinidae → (7 species)
      • Plexechinus sulcatus
      • Plexechinus spectabilis
      • Plexechinus aoteanus
      • Plexechinus hirsutus
      • Plexechinus parvus
      • Plexechinus cinctus
      • Plexechinus planus
    • Corystusidae → (2 species)
      • Corystus relictus
      • Galeraster terkosensis
    • Calymnidae → (3 species)
      • Sternopatagus → (2 species)
        • Sternopatagus sibogae
        • Sternopatagus sinensis
      • Calymne relicta
    • Urechinidae → (12 species)
      • Urechinus → (3 species)
        • Urechinus naresianus
        • Urechinus antipodeanus
        • Urechinus reticulatus
      • Antrechinus → (3 species)
        • Antrechinus drygalskii
        • Antrechinus mortenseni
        • Antrechinus nordenskjoldi
      • Pilematechinus → (3 species)
        • Pilematechinus belyaevi
        • Pilematechinus rathbuni
        • Pilematechinus vesica
      • Cystechinus → (3 species)
        • Cystechinus wyvillii
        • Cystechinus loveni
        • Cystechinus giganteus
    • Carnarechinus clypeatus

Other links

• Wikidata
• Wikipedia (language: en)
• Wikipedia (language: fr)
• Wikipedia (language: pt)
• Wikipedia (language: nl)
• Encyclopedia of Life
• NCBI (genetics)"
• Open Tree of Life

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