Turonian-Santonian echinoids fromWadi Qena, Eastern Desert, Egypt; a new arrangement of apical disc plating in spatangoids
Abdelhamid, Marouf Abdelaty Mohamed;
Abstract
Eighteen echinoid species (seven regular and eleven irregular) belonging to twelve genera have been
described from the Turonian-Santonian succession of two sections located in the northern part of Wadi
Qena, Eastern Desert. The diversity of the recorded species is low in the Turonian (six species), but
comparatively high in the Coniacian-Santonian (twelve species). Of the recorded species, Most of these
species (72%) are recorded for the first time from Wadi Qena area, one left in open nomenclature,
Mecaster sp., represents a new species, and two, Phymosoma microtuberculatum and Thylechinus (T.) said,
represent new records for Egypt. The taxonomic rank of Parapygus sudrensis has been changed. Phymosoma
microtuberculatum which is known from the ‘Senonian’ of southwest Europe is recorded herein
in the lower Turonian. Two echinoid assemblage zones are recognizable in each of the studied two
sections. They are correlated with other fossil assemblage zones in Egypt. Faunal affinity and paleobiogeography
of the species are discussed. A new arrangement of apical disc plating in spatangoids is
described and discussed.
described from the Turonian-Santonian succession of two sections located in the northern part of Wadi
Qena, Eastern Desert. The diversity of the recorded species is low in the Turonian (six species), but
comparatively high in the Coniacian-Santonian (twelve species). Of the recorded species, Most of these
species (72%) are recorded for the first time from Wadi Qena area, one left in open nomenclature,
Mecaster sp., represents a new species, and two, Phymosoma microtuberculatum and Thylechinus (T.) said,
represent new records for Egypt. The taxonomic rank of Parapygus sudrensis has been changed. Phymosoma
microtuberculatum which is known from the ‘Senonian’ of southwest Europe is recorded herein
in the lower Turonian. Two echinoid assemblage zones are recognizable in each of the studied two
sections. They are correlated with other fossil assemblage zones in Egypt. Faunal affinity and paleobiogeography
of the species are discussed. A new arrangement of apical disc plating in spatangoids is
described and discussed.
Other data
Title | Turonian-Santonian echinoids fromWadi Qena, Eastern Desert, Egypt; a new arrangement of apical disc plating in spatangoids | Authors | Abdelhamid, Marouf Abdelaty Mohamed | Keywords | Turonian-Santonian, Echinoids, Apical disc plating, Spatangoids, Egypt | Issue Date | 2015 | Publisher | Elsevier | Journal | Cretaceous Research |
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