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Diagnostic Features
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- Test bottle-shaped with strongly elongate anterior and posterior rostra; thin-shelled.
- Apical disc with two gonopores only opening in single anterior genital plate (?=G2). Compact. Posterior ocular plates far removed from remaining plates of apical disc.
- Ambulacra all similar with minute pores only.
- Anterior ambulacrum deeply sunken from ambitus adorally, forming a funnel-like opening leading to the peristome.
- Peristome subcircular and facing anteriorly into frontal groove.
- Plastron plating orthosternous; sternal plate enlarged and followed by a pair of symmetrical episternal plates.
- Plastron plating disjunct.
- Ambulacra I and V continuous on oral surface; not separated by intercalated plates of interambulacra 1 and 4.
- Scattered small tubercles distributed over the aboral surface.
- Periproct supramarginal, overarched by interambulacral plates.
- Subanal fasciole present.
There are two subgenera: E. (Echinosigra) and E. (Echinogutta)
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Distribution
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Recent; Atlantic, Antarctic, Indian Ocean. |
| Name gender |
feminine |
| Type |
Pourtalesia phiale Thomson, 1873, p. 90, by original designation. |
| Species Included |
- E. (E.) phiale phiale (Thomson, 1873); Recent, NE Atlantic, Antarctic.
- E. (E.) phiale partita Mironov, 1997; Recent.
- E. (E.) mortenseni Mironov, 1974; Recent.
- E. (E.) porrecta Mironov, 1974; Recent.
- E. (E.) vitayazi Mironov, 1997; Recent.
- E. (Eg.) amphora amphora Mironov, 1974; Recent.
- E. (Eg.) amphora indica Mironov, 1974; Recent.
- E. (Eg.) antarctica Mironov, 1974; Recent.
- E. (Eg.) fabrefacta Mironov, 1974; Recent.
- E. (Eg.) valvaedentata Mironov, 1974; Recent.
See also Echinosigra (Echinogutta) and Echinosigra (Echinosigra) |
| Classification and/or Status |
Holasteroida, Meridosternata, Urechinina, Pourtalesiidae.
Monophyletic.
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| Remarks |
Differs from Pourtalesia by having a much extended anterior rostrum.
Mironov, A. N. 1997. [Holasteroid sea urchins. 4. Echinosigra]. Zoologicheskii Zhurnal 76, 173-186.
Mortensen, T. 1907. Danish Ingolf-expedition 4 (1-2) Echinoidea.
Mortensen, T.1950. A Monograph of the Echinoidea. V.1. Spatangoida 1. C. A. Reitzel, Copenhagen.
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