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Echinoidea source details

Abdelhamid, M. A. (2014b). Revision of the echinoid genus Micropedina Cotteau, 1866 and description of a new species from the upper Cenomanian of Egypt. Cretaceous Research. 51: 95-111.
196709
10.1016/j.cretres.2014.05.015 [view]
Abdelhamid, M. A.
2014b
Revision of the echinoid genus Micropedina Cotteau, 1866 and description of a new species from the upper Cenomanian of Egypt
Cretaceous Research
51: 95-111
Publication
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.
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Date
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2015-03-19 08:17:43Z
created

[unassigned] Arbaciidae bipatellis Gregory, 1906 † (status source)
[unassigned] Arbaciidae rotularis de Loriol, 1887 † (status source)
[unassigned] Arbaciidae sphaeroides Stoliczka, 1873 † (status source)
Codiopsis cotteaui Coquand, 1862 † accepted as Micropedina cotteaui (Coquand, 1862) † (basis of record)
Echinus olisiponensis Forbes in Sharpe, 1850 † accepted as Micropedina olisiponensis (Forbes in Sharpe, 1850) † (basis of record)
Micropedina Cotteau, 1867 † (status source)
Micropedina bipatellis Gregory, 1906 † accepted as [unassigned] Arbaciidae bipatellis Gregory, 1906 † (basis of record)
Micropedina conica Fourtau, 1912 † accepted as Micropedina cotteaui (Coquand, 1862) † (status source)
Micropedina cotteaui (Coquand, 1862) † (redescription)
Micropedina gongilensis Brighton, 1925 † (status source)
Micropedina humei Fourtau, 1909 † accepted as Micropedina cotteaui (Coquand, 1862) † (status source)
Micropedina olisiponensis (Forbes in Sharpe, 1850) † (redescription)
Micropedina olisiponensis cotteaui (Coquand, 1862) † accepted as Micropedina cotteaui (Coquand, 1862) † (basis of record)
Micropedina rotularis de Loriol, 1887 † accepted as [unassigned] Arbaciidae rotularis de Loriol, 1887 † (basis of record)
Micropedina simplex Abdelhamid, 2014b † (original description)
Micropedina sphaeroides Stoliczka, 1873 † accepted as [unassigned] Arbaciidae sphaeroides Stoliczka, 1873 † (basis of record)
 Diagnosis

Medium-sized species of Micropedina with compound ambulacral plates at the ambitus composed of three elements; the ... [details]

 Diagnosis

Medium to large-sized species of Micropedina with compound ambulacral plates at the ambitus composed of three ... [details]

 Diagnosis

A species of Micropedina with compound ambulacral plates composed of three included simple elements. Except for ... [details]

 Etymology

In allusion to the simplicity of ambulacral plating, in comparison with other species of Micropedina. [details]

 Fossil range

upper Cenomanian [details]

 Status

Species excluded from Micropedina by Abdelhamid (2014b), thus treated as unassigned here. [details]

 Status

Species excluded from Micropedina by Abdelhamid (2014b), thus treated as unassigned here. [details]

 Status

Species excluded from Micropedina by Abdelhamid (2014b), thus treated as unassigned here. [details]

 Stratigraphy

Galala Formation [details]

 Type locality

Gabal West Gharamul, Eastern Desert, Egypt. [details]

 Type material

Holotype: CGM.Inv.525; Paratypes: ASUGM.WBg.E.6.1-2. ASUGM = Geological Museum, Faculty of Science, Ain Shams ... [details]


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