Desoricidaris aegyptica ( Fourtau, 1914 )

Mohamed Abdelhamid, Marouf Abdel-Aty & Moustafa Azab, Mahmoud, 2012, Turonian-Santonian echinoids from Egypt, Geodiversitas 34 (3), pp. 575-615 : 580

Desoricidaris aegyptica ( Fourtau, 1914) ( Fig. 5A)

Leiocidaris aegyptica Fourtau, 1914: 4 , pl. 1, fig. 2.

Desoricidaris aegyptica – Geys 1992: 143.

MATERIAL EXAMINED. — Several test fragments from the Coniacian-Santonian of Abu Roash (Ostrea and Plicatula unit), ASUARE1, Abu Roash echinoid horizon 4 ( REH 4).

DESCRIPTION

Ambulacra narrow, flexuous. Pores in each pore pair equal, oval, conjugate. Pore pairs separated by ridges. Interporiferous zone occupied by four horizontal granules, the outer granules slightly larger than the inner. Interambulacra with two rows of well-developed, perforate, non-crenulated primary tubercles. Areoles shallow, nearly round, surrounded by conspicuous scrobicular tubercles. Adradial extrascrobicular surface null. Interradial extrascrobicular surface narrow.

REMARKS

The relation between the genera Phyllacanthus Brandt, 1835 , Leiocidaris Desor, 1855 , Rhabdocidaris Desor, 1855 and Desoricidaris Geys, 1992 was discussed by Abdelhamid (1997).