| Introduction | | Search taxa | | Taxon tree | | Specimens | | Attributes | | Literature | | Photo gallery | | Stats | | Log in |
Echinoidea source details
Abdelhamid, M. A. M. (2014a). Middle–upper Cenomanian echinoids from north Wadi Qena, North Eastern Desert, Egypt. Cretaceous Research. 50: 138-170.
196704
10.1016/j.cretres.2014.04.010 [view]
Abdelhamid, M. A. M.
2014
Middle–upper Cenomanian echinoids from north Wadi Qena, North Eastern Desert, Egypt
Cretaceous Research
50: 138-170
Publication
Two Upper Cretaceous (middle-upper Cenomanian) sections located at the northern part of Wadi Qena were measured and their echinoids were collected carefully bed by bed. This area is abnormally rich in echinoids where their diversity is high and also many species are abundant. Twenty-three echinoid species (10 regular and 13 irregular) referred to twelve genera have been identified and taxonomically described. Two new species are established: Pedinopsis hemisphaerica and Phymosoma elqotti. The taxonomic rank of two species is changed. Three species, which are described from the Cenomanian of Algeria and Tunisia, are new records from Egypt. Phymosoma major Coquand, which is common in the Turonian of North Africa and south Europe, is recorded here in the Late Cenomanian for the first time. The echinoid Anorthopygus Cotteau, 1859 and its species are revised. Three echinoid assemblage zones are delineated in each of the two studied sections. They are compared to other macro-faunal assemblage zones in the Cenomanian at different parts in Egypt. The palaeobiogeography of the echinoids in the present study is discussed.
Africa
Date action by
Cyphosoma major (Coquand, 1862) † accepted as Phymosoma major Coquand, 1862 † (basis of record)
Magnosia desori Coquand, 1862 † accepted as Pedinopsis (Pedinopsis) desori (Coquand, 1862) † (basis of record) Pedinopsis (Pedinopsis) desori (Coquand, 1862) † (basis of record) Pedinopsis (Pedinopsis) hemisphaerica Abdelhamid, 2014a † (original description) Pedinopsis desori (Coquand, 1862) † represented as Pedinopsis (Pedinopsis) desori (Coquand, 1862) † (basis of record) Phymosoma elqotti Abdelhamid, 2014a † (original description) Phymosoma major Coquand, 1862 † (basis of record) Phymosoma majus † accepted as Phymosoma major Coquand, 1862 † (basis of record)
Egypt for Pedinopsis (Pedinopsis) hemisphaerica Abdelhamid, 2014a †
Egypt for Phymosoma elqotti Abdelhamid, 2014a † Diagnosis Pedinopsis species with hemispherical test flattened around the peristome. The poriferous zone is biserial from the ... [details] Diagnosis A species of Phymosoma has six columns of imperforate, crenulated primary tubercles on each interambulacral area at ... [details] Etymology From the hemispherical shape of test. [details] Etymology After Dr. Gamal El Qot, Faculty of Science, Benha University, who recorded similar specimen from Gabal Ekma, ... [details] Fossil range middle Cenomanian [details] Stratigraphy Galala Formation [details] Type locality north Wadi Qena, Eastern Desert, Egypt [details] Type locality Wadi El Burga a branch of Wadi Qena, north Eastern Desert, Egypt. [details] Type material Holotype: ASU.GM.nWQn.E.11.22; Paratypes: ASU.GM.nWQn.E.11.23 and 24. ASU.GM. = Geological Museum, Ain Shams ... [details] Type material Holotype: ASU.GM.WBg.E.7.2; Paratype: ASU.GM.WBg.E.7.3 ASU.GM. = Geological Museum, Ain Shams University, Cairo, Egypt. [details] |