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The Echinoid Directory

Sternopatagus de Meijere, 1903, p. 10

[=Sanchezaster Lambert, in Sanchez Roig, 1924, p. 13, type species S. habanensis Lambert, in Sanchez Roig, 1924]

Diagnostic Features	Test ovate with frontal ambulacrum only just concave at ambitus. Lower surface convex. Subconical in profile with retrenched posterior face Plating thin Apical disc somewhat anterior of centre with four gonopores Ambulacra non-petaloid; pores single and rudimentary. Ambulacral plates relatively tall over aboral surface Well-developed frontal groove present from beneath ambitus to peristome Peristome small and oval, vertical and facing anterior Plastron plating orthosternous - labral plate followed by single symmetrical sternal plate, and then two pairs of paired episternal plates. subsequent plating biserial Labral plate disjunct from sternal plate No primary tubercles aborally Marginal fasciole present
Distribution	Late Cretaceous to Recent, North Africa, Cuba, China Sea
Name gender	masculine
Type	Sternopatagus sibogae de Meijere, 1903, p. 10, by original designation
Species Included	S. sibogae de Meijere, 1903; Recent, China Sea S. habanensis Lambert in Sanchez Roig, 1924; Eocene, Cuba S. mairei Lambert; Late Cretaceous, Senegal
Classification and/or Status	Holasteroida, Meridosternata, Stegasterina, Calymnidae Monophyletic
Remarks	Differs from the closely related Seunaster in having aboral ambulacral plates much closer in size to interambulacral plates, and in having a disjunct plastron. Differs from Lampadocorys (which also has a disjunct plastron) in having symmetrical, paired episternal plates and a marginal fasciole. de Meijere, J. C. H. 1903 (February). Tijdschr. Nederland Cierk, Ver., (2), 8, p. 10. J.C.H. de Meijere 1904. Die Echinoidea der Siboga-Expedition. Monographs of the Siboga Expedition 43, 251 pp., 22 pls.