کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4729062 1640239 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Aberrant rostral teeth of the sawfish Onchopristis numidus from the Kem Kem beds (?early Late Cretaceous) of Morocco and a reappraisal of Onchopristis in New Zealand
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
Aberrant rostral teeth of the sawfish Onchopristis numidus from the Kem Kem beds (?early Late Cretaceous) of Morocco and a reappraisal of Onchopristis in New Zealand
چکیده انگلیسی

A single crown of sawfish rostral ‘tooth’ with at least two barbs along its posterior margin is comparable with Onchopristis dunklei from the Woodbine Formation of Texas and Atlanticopristisequatorialis from the Alcântara Formation of Brazil. However, it is regarded here as an aberrant Onchopristisnumidus, the typical form from North Africa. An aberrant morph of O. numidus is considered pathological. The taxonomic utility of barb number in pristid rostral ‘teeth’ is discussed. The genus and species Australopristis wiffeni gen. et sp. nov is erected to accommodate some multi-cusped rostral teeth from the Late Cretaceous of New Zealand.


► The sawfish Onchopristis from the Cretaceous Kem Kem beds of Morocco is discussed.
► An aberrant rostral tooth of Onchospristis is described.
► Onchopristis specimens from New Zealand are placed in the new genus Australopristis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of African Earth Sciences - Volume 64, 14 February 2012, Pages 71–76
نویسندگان
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