Memoirs of the Geological Survey of Pakistan, Volumes 5-6The Survey, 1969 |
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Page 16
... prominent , incurved , umbonal area in the right valve larger , more pronounced than the left valve ; beaks prominent , incurved , very slightly prosogyrate in the right valve and strongly opisthogyrate in the left valve ; margin smooth ...
... prominent , incurved , umbonal area in the right valve larger , more pronounced than the left valve ; beaks prominent , incurved , very slightly prosogyrate in the right valve and strongly opisthogyrate in the left valve ; margin smooth ...
Page 22
... prominent ; beak prominent , situated about one third the length of valve from posterior extremity ; cardinal margin distinctly oblique , inclined an- teriorly ligamental area large , some what deep , fairly wide triangular dorsally ...
... prominent ; beak prominent , situated about one third the length of valve from posterior extremity ; cardinal margin distinctly oblique , inclined an- teriorly ligamental area large , some what deep , fairly wide triangular dorsally ...
Page 60
... prominent rim , the crest bears a spiral thread , crenulated by intersection of short , oblique ribs , which are retrocurrent anteriorly , there is a deep , narrow concavity in between the circumsutural rim and broad sinus , which bears ...
... prominent rim , the crest bears a spiral thread , crenulated by intersection of short , oblique ribs , which are retrocurrent anteriorly , there is a deep , narrow concavity in between the circumsutural rim and broad sinus , which bears ...
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Common terms and phrases
abapertural view aperture appears Arch Archiac & Haime band broadly Chharat consists convex Corbula Cossmann & Pissarro Cotter Cretaceous Description Deshayes designation differs dimensions District D. G. Khan Domanda shale dorsally Drazinda shale Drug section exterior left valve Family fauna feet figured Formation forms fossil Further distribution gastropod Genus Geol geology Ghazij fm gray Group height holotype India intervals Iqbal Italy Jhalar Kohat Lamarck larger length Limestone lines Linne Locality Lower Eocene margin Middle Eocene monotypy ornament Ostrea outline pakistanica Eames Paleocene Paris pelecypod PLATE pointed posterior preserved prominent Quetta Rakhi Nala Range Recent Remarks ribs right valve rounded Shahrig shell short similar slightly soriensis Eames specimen spiral Surv suture thick thin threads Type number.-Specimens type occurrence Type species UCLA umbonal Upper ventral Vredenburg West Pakistan whorls Zinda Pir section