Revision of the echinoid genus Micropedina Cotteau, 1866 and description of a new species from the upper Cenomanian of Egypt
Abdelhamid, Marouf Abdelaty Mohamed;
Abstract
Currently, the genus Micropedina contains seven species and a single variety, with records from the lower
Upper Cretaceous of Europe (Portugal, Spain), North Africa (Algeria, Tunisia and Egypt), West Africa
(Nigeria), the Middle East, India and the Americas. In Egypt, a total of five species is known to date. Based
on the oblique arrangement of pore pair triads in each compound ambulacral plate, three species cannot
be assigned to the genus any longer; these are ‘M.’ sphaeroides, ‘M.’ rotularis and ‘M.’ bipatellis. Using
ambulacral plate compounding, two species are valid, M. olisiponensis and M. cotteaui, in addition to a
variety which is here elevated to species rank, M. gongilensis, and a new species erected herein,
M. simplex. Three species are described from the upper Cenomanian Galala Formation of north Wadi
Qena (Northeastern Desert, Egypt) namely M. olisiponensis, M. cotteaui and M. simplex sp. nov. The
palaeobiogeography, functional morphology and palaeoecology of the genus are discussed.
Upper Cretaceous of Europe (Portugal, Spain), North Africa (Algeria, Tunisia and Egypt), West Africa
(Nigeria), the Middle East, India and the Americas. In Egypt, a total of five species is known to date. Based
on the oblique arrangement of pore pair triads in each compound ambulacral plate, three species cannot
be assigned to the genus any longer; these are ‘M.’ sphaeroides, ‘M.’ rotularis and ‘M.’ bipatellis. Using
ambulacral plate compounding, two species are valid, M. olisiponensis and M. cotteaui, in addition to a
variety which is here elevated to species rank, M. gongilensis, and a new species erected herein,
M. simplex. Three species are described from the upper Cenomanian Galala Formation of north Wadi
Qena (Northeastern Desert, Egypt) namely M. olisiponensis, M. cotteaui and M. simplex sp. nov. The
palaeobiogeography, functional morphology and palaeoecology of the genus are discussed.
Other data
| Title | Revision of the echinoid genus Micropedina Cotteau, 1866 and description of a new species from the upper Cenomanian of Egypt | Authors | Abdelhamid, Marouf Abdelaty Mohamed | Keywords | Pedinoida, Taxonomy, Mid-Cretaceous, Egypt | Issue Date | 2014 | Publisher | Elsevier | Journal | Cretaceous Research |
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