Pourtalesiidae
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| A. Agassiz , 1881 |
The Pourtalesiidae (Pourtalesiidae) are a family of irregular sea urchins that live in the deep sea . They are secondary bilaterally symmetrical and elongated in shape. Representatives of this family were first discovered by Louis-François de Pourtalès . The genus Pourtalesia was named after him, after which the family is named. With them, as with the other holasteroida , the lantern of Aristotle, which is characteristic of most sea urchins, is missing . The family is already known from the Upper Cretaceous Period ( Maastrichtian ) and spread around the world.
Species and genera
There are currently 28 known and 5 extinct species of Pourtalesia, which are divided into 10 genera.
- Genus Ceratophysa Pomel, 1883
- Ceratophysa ceratopyga ( A. Agassiz , 1879)
- Ceratophysa rosea ( A. Agassiz , 1879)
- Genus Cystocrepis Mortensen, 1907
- Cystocrepis setigera ( A. Agassiz , 1898)
- 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
- Helgocystis carinata ( A. Agassiz , 1879)
- 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
swell
- ^ Pourtalesiidae - Natural History Museum. Retrieved April 21, 2019 .
- ^ WoRMS - World Register of Marine Species - Pourtalesiidae A. Agassiz, 1881. Retrieved April 21, 2019 .