The Echinoid Directory

Nucleopyrina Pomel, 1883, p. 53

Diagnostic Features	Test ovate in outline, depressed in profile with rounded ambitus. Apical system central, tetrabasal with four gonopores; genital plates subequal in size and all in contact. The posterior ocular plates abutting to the rear of the genital plates. Periproct large, elongate tear-shaped, marginal in position. Ambulacra narrow adapically, petals undeveloped, pore-pairs small, simple, uniserial throughout, becoming weakly offset in lines of three adorally. No buccal pores. Plating pyrinoid throughout Interambulacra wide. Tuberculation of small uniform primaries with slightly sunken areoles scattered over plates; in between there is dense uniform granulation. No oral/aboral differentiation. Peristome subcentral, obviously oblique, a little depressed.
Distribution	Lower Cretaceous (Aptian), France.
Name gender	feminine
Type	Pyrina cylindrica Gras, 1848, p. 45; by original designation.
Species Included	N. cylindrica (Gras, 1848); Aptian, western Europe.
Classification and/or Status	Irregularia; Echinoneoida, Conulidae. Subjective junior synonym of Globator Agassiz, 1840.
Remarks	Pomel, A. 1883. Classification méthodique et Genera des Échinides vivantes et fossiles. Thèses présentées à la Faculté des Sciences de Paris pour obtenir le Grade de Docteur ès Sciences Naturelles 503, Adolphe Jourdan, Alger, 131 pp.