Original paper
Statistical analysis of a Cretaceous Oyster from Egypt
Kassab, Ahmed S.
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen Band 182 Heft 2 (1991), p. 239 - 254
21 references
published: Jun 10, 1991
DOI: 10.1127/njgpa/182/1991/239
ArtNo. ESP155018202004, Price: 29.00 €
Abstract
Ilymatogyra africana (Lamarck) is a common exogyrine oyster which inhabited Tethyan near-shore water in the Mediterranean Province during Upper Cenomanian time. Continuous variation within a large population confirms that we deal with a single species. By defining general size and shape vectors in ten morphometric characters, by the principal component analysis, variation in the population was explained as differences in shell geometries throughout growth. Specimens previously referred to as Rhynchostreon suborbiculatum (Lamarck) probably belong to the analyzed species.
Kurzfassung
Die statistische Analyse eines reichen Austernschills aus dem Ober-Cenoman zeigt, daß auch die extremsten Varianten derselben Art ilymatogyra africana (Lamarck) angehören, obwohl sie früher verschiedenen Arten und Gattungen (vor allem Rhynchostreon suborbiculatum) zugeordnet worden waren.
Keywords
Cretaceous Oyster