The Echinoid Directory

• Test subcircular with faint or no anterior sulcus. Test subconical in profile with flat base.
• Apical disc central, ethmophract with four gonopores; genital plate 2 separating posterior genital plates and reaching ocular plate IV.
• Ambulacra all similar; all five ambulacra petaloid aborally with elongate pore-pairs; frontal ambulacral pore-pairs slightly narrower; parallel and open distally.
• Peristome subpentagonal and anterior of centre.
• Plastron plating unknown in type species. Amphisternous in Japanese species, with relatively short labrum. Paired sternal plates; three post-sternal plates forming the oral surface.
• Periproct low down on short posterior face; slightly taller than wide.
• No fascioles.

Lower Cretaceous: Hauterivian, France; Berriasian, Japan.

Aphelaster integer Gauthier, in Lambert, 1920, p. 9, by original designation. Figured syntype: Museum National d\'Histoire Naturelle, Paris, J01212.

• A. integer Gauthier; Hauterivian, France.
• A. serotinus Tanaka & Shibata, 1961; Berriasian, Japan.

Spatangoida, stem group (toxasterids).

?paraphyletic by exclusion of Mokotibaster.

Resembles Mokotibaster but has the periproct marginal rather than inframarginal. It is unfortunate that the structure of the plastron is unknown in the type species. The name integer was ascribed to Gauthier (Mss) by Lambert (1920) where it was first validated.

Lambert, J. 1920. Sur quelques echinides du Cretace Inferieur de la Provence. Notes Provencales du Dr A. Guebhard 11, 1-22, 2 pls.

Lambert, J. 1927. Revision des echinides fossiles de la Catalogne. Memorias del Museo de Ciencias Naturales de Barcelona, Serie Geologica 1, 1-102, pls 1-4.