Myledaphus bipartus, Cope, 1876
publication ID |
https://doi.org/ 10.5281/zenodo.3233762 |
DOI |
https://doi.org/10.5281/zenodo.4583847 |
persistent identifier |
https://treatment.plazi.org/id/03BAEA64-B533-4071-7144-FA37FA7ADD33 |
treatment provided by |
Jeremy |
scientific name |
Myledaphus bipartus |
status |
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Myledaphus bipartus , Cope.
Plate XIX, figs. 1 and 2 View PLATE XIX .
Myledaphus bipartitus . Cope. 1876. Proc. Acad. Nat. Sci. Philadel., p. 260.
This species is represented by many teeth found separate in all cases. Their variation in size is considerable, the smallest measuring about 225 mm. on the longer diameter of the crown, whilst the largest collected has a diameter of 9 mm. in the same direction. The proportions of the majority of the specimens are nearly constant. Measurements taken from an average sized tooth almost coincide with those given by the author of the species in his original description. In the majority of the specimens the crown is irregularly striated in a direction at right angles to and on both sides of the line dividing it into halves although generally one half has fewer striations than the other. The crowns of some of the teeth are smoother than those of others, a dift'erence due probably to age.
Measurements of an average sized tooth. | |
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M. | |
Length of tooth | 0055 |
Long diameter of crown | 0062 |
Short " " | 0045 |
Length of root | 0030 |
Long diameter of root | 0042 |
Short " " | 0030 |
Belly River series, Eed Deer river, 1898 and 1901.
Dr. Gr. M. Dawson collected a number of specimens on Belly river, N.W.T. (Nos. 40 and 41), in 1881, and Mr. Weston specimens in Irvine coulee, near Irvine station on the line of the C.P.E., in 1888.
Cope, in describing this g-euiis, was doubtful as to its affinities, biit states " that the form of the root recalls the Elasmobranchii, and that of the crown some of the rays. The types he recorded as from the Fort Union beds of Montana.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Myledaphus bipartus
Lambe L. M. 1902 |
Myledaphus bipartitus
Cope 1876 |