The Echinoid Directory

Holasteropsis Elbert, 1902, p. 115

Diagnostic Features	Test weakly cordiform; anterior sulcus virtually absent aborally; developed as a shallow, clearly marked furrow on oral surface; base flat. Apical disc with four gonopores. Paired ambulacra with small pore-pairs. Pore-pairs in anterior ambulacrum smaller and more oblique. Columns of pore-pairs almost equally developed in paired ambulacra. Peristome ovate; facing directly downwards. Plastron plating meridosternous; biserial after the first sternal plate. Periproct oral. Slightly enlarged primary tubercles developed at ambitus. No fascioles.
Distribution	Upper Cretaceous (Turonian), western Europe.
Name gender	feminine
Type	Holasteropsis credneriana Elbert, 1902 (=Pseudananchys latissima Roemer, 1840) by original designation.
Species Included	H. latissima (Roemer, 1840); Turonian, Germany.
Classification and/or Status	Holasteroida, Meridosternata, Holasteridae. Subjective junior synonym of Scagliaster Munier-Chalmas,1891.
Remarks	Differs from Holaster (with which it was synonymized by Wagner & Durham 1966) by its oral periproct. Differs from Echinocorys in having a distinct groove on the oral surface leading to the peristome. Differs from Huttonechinus in plastron plating, Huttonechinus having an orthosternous plastron with a rostral plate. J. Elbert 1902. Das untere Angoumien in den Osningbergketten des Teutoburger Waldes. Palaeontologische untersuchungen. Verhandlungen des naturhistorischen Vereins der preussischen Rheinlands, Westfalens und des Reg.-Bezirks Osnabruck 58, 97-166, pls 3-5.