The Echinoid Directory

Adelopneustes Gauthier, 1889, p. 52

[=Neoglobator Endelman, 1980, type species Neoglobator panteleevi Endelman, 1980; =Mattsechinus Collignon & Lambert, 1928, type species Mattsechinus collignoni Thiery, 1928]

Diagnostic Features	Test ovate in outline, hemispherical to subconical in profile with low ambitus. Apical system central, tetrabasal with four gonopores; genital plates subequal in size and all in contact. The posterior ocular plates small and widely separated to the rear of the posterior genital plates. Periproct longitudinal, ovate to tear-derop-shaped, inframarginal in postition. Ambulacra narrow adapically, petals undeveloped, pore-pairs small, simple, uniserial throughout, becoming very slightly offset in lines of three adorally. No buccal pores. Ambulacral plating simple above the ambitus, pyrinoid below the ambitus with one or both of the smaller elements excluded from the perradial suture. Interambulacra wide. Tuberculation of small uniform primaries with slightly sunken areoles scattered over plates with a dense unifrom granulation in between. No oral/aboral differentiation. Peristome subcentral, subcircular to strongly oblique, orientated with major axis running from Amb. V to Iamb. 2a; opening a little sunken. Lantern, lantern supports and spines all unknown.
Distribution	Upper Cretaceous (Maastrichtian) to Lower Eocene, North and West Africa, Europe, Ukraine to Kazakhstan.
Name gender	feminine
Type	Adelopneustes lamberti Thomas & Gauthier, 1889, p. 53 [=Pyrina montainvillensis Sorignet, 1850, p. 40], by original designation.
Species Included	A. montainvillensis (Sorignet, 1850); Maastrichtian-Danian, Europe, Ukraine to Kazakhstan [includes A. houzeaui (Cotteau, 1875)] A. boehmi (Nietsch, 1921); Maastrichtian-Danian, northern Europe. A. ernsti Smith & Gallemi, 1999; Thanetian, Spain. A. raingeardi (Tessier & Roman, 1973); Thanetian, Ivory Coast.
Classification and/or Status	Irregularia; Echinoneoida, Conulidae.
Remarks	Distinguished from Conulus in having pyrinoid plating confined to the oral surface and in having less strongly developed zones of pore-pairs adorally. Gauthier, V. 1889. Exploration scientifique de la Tunisie. Illustrations de la partie Paleontologique et geologique. Fascicule 1. Echinides Fossiles. Paris: Imprimerie nationale. Smith, A. B. & Jeffery, C. H. 2000. Maastrichtian and Palaeocene Echinoids: a key to world faunas. Special Papers in Palaeontology 63, 1-404. Jagt, J. W. M. 2001. Late Cretaceous-Early Palaeogene echinoderms and the K/T boundary in the southeast Netherlands and northeast Belgium - Part 4: Echinoids. Scripta Geologica 121, 181-375.