Pourtalesiidae
Pourtalesia miranda
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Order: Holasteroida
Family: Pourtalesiidae
Agassiz, 1881

The pourtalesiids (Pourtalesiidae) are a family of irregular sea urchins that live in the deep sea. They are secondarily bilateral-symmetrical and like other representatives of the taxon Holasteroida they lack the lantern of Aristotle, which is typical for many other sea urchins. The genus Pourtalesia was named after Louis-François de Pourtalès who first collected these animals while dredging at a depth of 600 m. The family is known already from the Upper Cretaceous (Maastrichtian) and is distributed worldwide.[1]

Species and genera

Currently, there are 10 genera with 28 extant and 5 extinct species described.[2]

  • genus Ceratophysa Pomel, 1883
  • genus Cystocrepis Mortensen, 1907
  • genus Echinocrepis A. Agassiz, 1879
    • Echinocrepis cuneata A. Agassiz, 1879
    • Echinocrepis rostrata Mironov, 1973
  • genus Echinosigra Mortensen, 1907
    • Echinosigra (Echinogutta) amphora Mironov, 1974
    • Echinosigra (Echinogutta) antarctica Mironov, 1974
    • Echinosigra (Echinogutta) fabrefacta Mironov, 1974
    • Echinosigra (Echinogutta) valvaedentata Mironov, 1974
    • Echinosigra (Echinosigra) mortensi Mironov, 1974
    • Echinosigra (Echinosigra) phiale (Thomson, 1873)
    • Echinosigra (Echinosigra) porrecta Mironov, 1974
    • Echinosigra (Echinosigra) vityazi Mironov, 1997
  • genus Galeaster Seunes, 1889 †
    • Galeaster carinatus Ravn, 1927 †
    • Galeaster dagestanensis Poslavskaya & Moskvin, 1960 †
    • Galeaster minor Poslavskaya, in Moskvin & Poslavskaya, 1949 †
    • Galeaster muntshiensis Tzaghareli, 1949 †
    • Galeaster sumbaricus Poslavskaya, in Moskvin & Poslavskaya, 1949 †
  • genus Helgocystis Mortensen, 1907
  • genus Pourtalesia A. Agassiz, 1869
    • Pourtalesia alcocki Koehler, 1914
    • Pourtalesia aurorae Koehler, 1926
    • Pourtalesia debilis Koehler, 1926
    • Pourtalesia heptneri Mironov, 1978
    • Pourtalesia hispida A. Agassiz, 1897
    • Pourtalesia jeffreysi Thomson, 1873
    • Pourtalesia laguncula A. Agassiz, 1879
    • Pourtalesia miranda A. Agassiz, 1869
    • Pourtalesia tanneri A. Agassiz, 1898
    • Pourtalesia thomsoni Mironov, 1976
    • Pourtalesia vinogradovae Mironov, 1995
  • genus Rictocystis Mironov, 1996
    • Rictocystis jensenae Mironov, 1996
  • genus Solenocystis Mironov, 2008
    • Solenocystis imitans Mironov, 2008
  • genus Spatagocystis A. Agassiz, 1879

References

  1. ↑ "Pourtalesiidae - Natural History Museum".
  2. ↑ "WoRMS - World Register of Marine Species - Pourtalesiidae A. Agassiz, 1881".
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