Psephodus dubius
Woodward, 1889
Classification: Holocephali
Reference of the original description
Catalogue of the fossil fishes in the British Museum. Part. I. British Museum (Natural History): 474 p., fig., 17 pl.
Catalogue of the fossil fishes in the British Museum. Part. I. British Museum (Natural History): 474 p., fig., 17 pl.
Images of types
Description:
Citation: Psephodus dubius Woodward, 1889: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 11/2024
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Psephodus dubius sp. nov.; “upper” dental pIate, coronal aspect, Carbfs. Limst.; Oreton, Shropshire. [P. 227 b.]; 13. “lower” dental plate, coronal aspect, [P. 4209]
Psephodus dubius sp. nov.; “upper” dental pIate, coronal aspect, Carbfs. Limst.; Oreton, Shropshire. [P. 227 b.]; 13. “lower” dental plate, coronal aspect, [P. 4209]
Description
Original description of Woodward, 1889 [2593]:
Type. “ Lower ” dental plate shown in PI. VI. figs. 13, 13 a. The provisional name of P. dubias may be given to a species indicated by the large dental plate shown in the figure. This specimen corresponds most closely in its characters and dimensions to the “ lower “ dental plate of P. magnus, exhibiting a similar cor-onal contour and coarsely crimped borders, but having a relatively much less antero-posterior measurement, and the outer portion of the plate not being so abruptly truncated but prolonged into an inrolled point, la addition to this gradual inrolment the plate is sharply bent along an oblique transverse line about its middle, and the marks of wear appear to be confined to the area outside this flexure.
Form. & Loc. Carboniferous Limestone: Shropshire.
P. 4209. Type-specimen; Oretou.
Original description of Woodward, 1889 [2593]:
Type. “ Lower ” dental plate shown in PI. VI. figs. 13, 13 a. The provisional name of P. dubias may be given to a species indicated by the large dental plate shown in the figure. This specimen corresponds most closely in its characters and dimensions to the “ lower “ dental plate of P. magnus, exhibiting a similar cor-onal contour and coarsely crimped borders, but having a relatively much less antero-posterior measurement, and the outer portion of the plate not being so abruptly truncated but prolonged into an inrolled point, la addition to this gradual inrolment the plate is sharply bent along an oblique transverse line about its middle, and the marks of wear appear to be confined to the area outside this flexure.
Form. & Loc. Carboniferous Limestone: Shropshire.
P. 4209. Type-specimen; Oretou.
Remarks
shark-references Species-ID=13219;
shark-references Species-ID=13219;
References
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, in press
DOI: 10.1017/pab.2024.1
The Palaeozoic genus Psephodus (Chondrichthyes, Cochliodontiformes) and the transition from teeth to tooth plates in holocephalians. Scottish Journal of Geology, 58(2), Article sjg2021–016
DOI: 10.1144/sjg2021-016
Catalogue of the fossil fishes in the British Museum. Part. I. British Museum (Natural History): 474 p., fig., 17 pl.
Rise and diversification of chondrichthyans in the Paleozoic. Paleobiology, in press
DOI: 10.1017/pab.2024.1
The Palaeozoic genus Psephodus (Chondrichthyes, Cochliodontiformes) and the transition from teeth to tooth plates in holocephalians. Scottish Journal of Geology, 58(2), Article sjg2021–016
DOI: 10.1144/sjg2021-016
Catalogue of the fossil fishes in the British Museum. Part. I. British Museum (Natural History): 474 p., fig., 17 pl.
