The Echinoid Directory

Sanchezella Durham, 1954, p. 682

Diagnostic Features	Test oval in outline; much longer than wide, with thick, rounded margin. Oral surface a little rounded, upper surface markedly depressed adapically. 4 gonopores; apical disc subcentral. Hydropores in a groove. Petals bowed and open distally. Plating includes some demiplates. No food grooves. Ambulacral very much wider than interambulacral zones at ambitus. Basicoronal ambulacral and interambulacral plates of similar length. First paired post-basicoronal plates much larger than others. Periproct oral, towards posterior margin. Opening at distal edge of first paired interambulacral plates and bounded by second paired interambulacral plates.
Distribution	Late Eocene of Cuba.
Name gender	feminine
Type	Jacksonaster sanchezi Lambert 1926 by original designation.
Species Included	Only the type species.
Classification and/or Status	Clypeasteroida; Scutellina; Laganiformes; Laganidae; Neolaganinae. Monotypic.
Remarks	The thick margin, strongly elongate shape and numerous oral ambulacral plates distinguish this genus. J. W. Durham 1955. Classification of clypeasteroid echinoids. University of California Publications in Geological Sciences 31(4), 73-198.