The Echinoid Directory

Peribrissus Pomel, 1869, p. 13

Diagnostic Features	Test large and cordiform with distinct anterior sulcus; posterior face truncate. Test depressed in profile. Apical disc anterior of centre; ethmolytic, with 3 gonopores. Ambulacrum III sunken aborally, the groove increasing to ambitus; pores small. Petals straight and depressed; narrow with little perradial space between columns; cruciform; the anterior pair longer than the posterior pair. Peristome and plastron plating unknown. Periproct on posterior truncate face. Marginal fasciole present. Peripetalous band arising immediately behind anterior petals.
Distribution	Miocene of North Africa and the Mediterranean.
Name gender	masculine
Type	Peribrissus saheliensis Pomel, 1869, p. 13, by subsequent designation of Pomel, 1883, p. 36.
Species Included	P. celsus (McNamara & Philip 1984); Early Miocene, Mannum, South Australia. (excluded from Peribrissus by Holmes, 2011) P. janiceae Holmes, 2011; Middle Miocene, South Australia. P. quasimodo (McNamara & Philip, 1984); Middle Miocene, Victoria, Australia. (excluded from Peribrissus by Holmes, 2011) P. saheliensis Pomel, 1869; Miocene, Algeria. P. sotgiai Giorgio, 1923; Miocene, Sardinia.
Classification and/or Status	Spatangoida, Paleopneustina, Prenasteridae. Monophyletic.
Remarks	Closely similar to Pericosmus differing only in having the marginal and peripetalous fascioles coalesced to the posterior of the anterior petals. Pomel, A. 1869. Revue des échinoderms et de leur classification pour servir d’introduction à l’étude des fossiles, 67 pp. Deyrolle, Paris. Holmes, F. C. 2011. A new species of Peribrissus (Echinoidea, Spatangoida) from the middle Miocene of South Australia. Memoirs of the Museum Victoria 68, 29–35. Di Georgio, A. 1923. Echinidi Miocenici della Sardegna. Atti della Societa Toscana di Scienze Naturali residente in Pisa, 35, pp. 116-130 pl. 2(1)