Post by creature386 on Jun 21, 2013 20:41:02 GMT 5
Kaibabvenator swiftae
desertsabertooth.deviantart.com/art/Kaibabvenator-compared-to-Great-White-334868625
Temporal range: Permian (Late Leonardian)[1]
Location: Kaibab Formation, northern Arizona (USA)[1]
Sciencifitic classification:
Chondrichthyes
Ctenacanthiformes
Ctenacanthidae
Kaibabvenator
K. swiftae[1]
Description:
Kaibabvenator swiftae is known from a holotype (MNAV10436) and five paratypes (MNA V10495, V10520, V10524, V568, V10518), which all are known from teeth. The teeth have a mesiodistal diameter of 20-30 mm.[2] It's median cusp are broad, robust, labially flattened and lingually convex. The cusps differ from the ones of Cladodus vanhornei in having a smooth enamel surface. The ones of Cladodus vanhornei have a coarse cristae near the base. Based on the rarity and large size of Kaibabvenator swiftae, it is believed that it was the apex predator in it's ecosystem.[3]
Habitat:
Kaibabvenator swiftae was found in the Kaibab formation (Permian, USA), which is was likely a shallow, open marine environment. The fauna consists of trilobites, crinoids, osteichthhans (which were quite diverse), cochliodonts and other sharks[4], such as Nanoskalme, Neosaivodus[5] and some undefined hybodont or neoselachii taxa.[4]
Phylogenetic position:
The tooth base of Kaibabvenator swiftae is most similar to the one of Glikmanius occidentalis, a shark which stalked the Eurasian and American seas during the late Carboniferous and early Permian.[3] Another shark sharing many features is Nanoskalme natans, known from the same formation.[5] A phylogenetic analysis shows Kaibavenator and Nanoskalme as sister Genera, forming a clade with Heslerodus and Glikmanius.[6]
Literature:
John-Paul M. Hodnett, David K. Elliott, Tom J. Olson and James H. Wittke (2012) Ctenacanthiform sharks from the Permian Kaibab Formation, northern Arizona In: Historical Biology Vol. 24, No. 4, p. 381–395 www.academia.edu/1833504/Ctenacanthiform_sharks_from_the_Permian_Kaibab_Formation_northernArizona
Footnotes:
[1] Hodnett et al. p. 381
[2] Hodnett et al. p. 387
[3] Hodnett et al. p. 388
[4] Hodnett et al. p. 383
[5] Hodnett et al. p. 391
[6] Hodnett et al. p. 392
desertsabertooth.deviantart.com/art/Kaibabvenator-compared-to-Great-White-334868625
Temporal range: Permian (Late Leonardian)[1]
Location: Kaibab Formation, northern Arizona (USA)[1]
Sciencifitic classification:
Chondrichthyes
Ctenacanthiformes
Ctenacanthidae
Kaibabvenator
K. swiftae[1]
Description:
Kaibabvenator swiftae is known from a holotype (MNAV10436) and five paratypes (MNA V10495, V10520, V10524, V568, V10518), which all are known from teeth. The teeth have a mesiodistal diameter of 20-30 mm.[2] It's median cusp are broad, robust, labially flattened and lingually convex. The cusps differ from the ones of Cladodus vanhornei in having a smooth enamel surface. The ones of Cladodus vanhornei have a coarse cristae near the base. Based on the rarity and large size of Kaibabvenator swiftae, it is believed that it was the apex predator in it's ecosystem.[3]
Habitat:
Kaibabvenator swiftae was found in the Kaibab formation (Permian, USA), which is was likely a shallow, open marine environment. The fauna consists of trilobites, crinoids, osteichthhans (which were quite diverse), cochliodonts and other sharks[4], such as Nanoskalme, Neosaivodus[5] and some undefined hybodont or neoselachii taxa.[4]
Phylogenetic position:
The tooth base of Kaibabvenator swiftae is most similar to the one of Glikmanius occidentalis, a shark which stalked the Eurasian and American seas during the late Carboniferous and early Permian.[3] Another shark sharing many features is Nanoskalme natans, known from the same formation.[5] A phylogenetic analysis shows Kaibavenator and Nanoskalme as sister Genera, forming a clade with Heslerodus and Glikmanius.[6]
Literature:
John-Paul M. Hodnett, David K. Elliott, Tom J. Olson and James H. Wittke (2012) Ctenacanthiform sharks from the Permian Kaibab Formation, northern Arizona In: Historical Biology Vol. 24, No. 4, p. 381–395 www.academia.edu/1833504/Ctenacanthiform_sharks_from_the_Permian_Kaibab_Formation_northernArizona
Footnotes:
[1] Hodnett et al. p. 381
[2] Hodnett et al. p. 387
[3] Hodnett et al. p. 388
[4] Hodnett et al. p. 383
[5] Hodnett et al. p. 391
[6] Hodnett et al. p. 392