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''Rhombodus'' is a prehistoric genus of
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ray
Ray may refer to:
Fish
* Ray (fish), any cartilaginous fish of the superorder Batoidea
* Ray (fish fin anatomy), a bony or horny spine on a fin
Science and mathematics
* Ray (geometry), half of a line proceeding from an initial point
* Ray (g ...
belonging to the family Rhombodontidae.
Species within this genus lived from the Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ...
period, Maastrichtian
The Maastrichtian () is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval from ...
age to the Paleocene
The Paleocene, ( ) or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), E ...
epoch, from 70.6 to 55.8 million years ago.Fossilworks/ref>
Species
Species within this genus include: *''Rhombodus andriesi '' Noubhani and Cappetta 1994 *''Rhombodus binkhorsti'' Dames, 1881 North America *''Rhombodus bondoni '' Arambourg 1952 *''Rhombodus carentonensis'' Vullo 2005 *''Rhombodus ibericus'' Kriwet et al. 2007 *''Rhombodus laevis'' Cappetta and Case 1975 *''Rhombodus meridionalis'' Arambourg 1952 *''Rhombodus microdon'' Arambourg 1952Description
''Rhombodus'' species could reach a length of . This genus is known from its caudal spines and rhombic teeth, which are all that usually fossilises. These rhombic teeth are bilobate, with vertical wrinkles and a width of about .Jim Bourdo/ref>
Distribution
Fossils have been found in the sediments of Africa, Europe, Asia and the Americas.See also
*Flora and fauna of the Maastrichtian stage
This is an incomplete list that briefly describes vertebrates that were Extant taxon, extant during the Maastrichtian, a stage of the Late Cretaceous Period which extended from 72.1 to 66 million years before present. This was the last time pe ...
* List of prehistoric cartilaginous fish (Chondrichthyes)
This list of prehistoric cartilaginous fish genera is an attempt to create a comprehensive listing of all genera that have ever been included in the class chondrichthyes ''and'' are known from the fossil record. This list excludes purely vernacul ...
References
Rajiformes Cretaceous fish of Asia Paleocene fish of Asia Prehistoric fish of Africa {{paleo-rajiformes-stub