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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/11306

Title: Pterotrigonia (Scabrotrigonia) scabra (LAMARCK, 1819), a polymorphic bivalve from the Upper Cretaceous (Coniacian-Santonian) of Egypt
Authors: Magdy M. EL-HEDENY
Keywords: Trigonioida,
bivalve,
Coniacian
Santonian,
polymorphism,
Egypt
Issue Date: 2006
Abstract: The non-siphonate, suspension feeding trigoniid bivalve Pterotrigonia (Scabrotrigonia) scabra (LAMARCK, 1819) are described from the Upper Cretaceous (Coniacian-Santonian) of Egypt, and its mode of life and paleogeographical distribution is discussed. It is a long-living species ranging from the uppermost Albian to the Campanian of Egypt. The inferred paleoecologic model is that Pterotrigonia (Scabrotrigonia) scabra lived shallowly infaunal and burrowed into sandy substrates. Due to the fact that the exact features and variability of this species are poorly known, confusion exists concerning its proper characters and geological range, and consequently its potential as stratigraphic marker has never been adequately established. Moreover, specimens of this species exhibit an unusually wide range of variability in shape and ornamentation of the valves. These variations are not restricted in any significant way to a definite stratigraphic level in the studied sections. They are mainly regarded as truly intraspecific and most likely referred to mode of life and ecophenotypy.
URI: http://hdl.handle.net/123456789/11306
Appears in Collections:College of Teaching

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