Lebachacanthus
| Lebachacanthus Temporal range:
| |
|---|---|
| |
| A illustration of Lebachacanthus | |
| |
| A Lebachacanthus senckenbergianus specimen housed in a collection from the Urzeitmeer-Museum | |
Scientific classification 
| |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Superorder: | Selachimorpha |
| Order: | †Xenacanthida |
| Family: | †Diplodoselachidae |
| Genus: | †Lebachacanthus Soler-Gijon, 1997 |
| Species: | †L. senckenbergianus
|
| Binomial name | |
| †Lebachacanthus senckenbergianus Soler-Gijon, 1997
| |
Lebachacanthus is a genus of extinct Xenacanthid shark known from the early Permian.[1] During the late Paleozoic, xenacanths ruled the freshwater swamps and bogs of the world, preying on small amphibian-like animals.[2]
Paleobiology[]
Lebachacanthus patrolled both fresh and marine waters, possibly preying on larvae of the temnospondyli and Acanthodians.[2] The genus displays sexually dimorphic features; females had longer fin spines than males. Histological and biometric analyses of the spines of specimens provides information on the development and age at death of the fish and the environmental conditions in which they lived.[3]
Description[]
Like most other xenacanthids, this genus possessed an array of spines arising from the dorsal fins.[3] It grew up to 3 metres (9.8 ft).[3] The genus is often confused with the similar genus Orthacanthus; the two genera belong to entirely separate families.[4] The teeth of this shark were multi-cusped, with the central cusp flanked by two sharp accessory "tines" on which its prey would be impaled and trapped, in preparation for being swallowed whole.[5] It had an abundance of pectoral fins, two next to the head, two in the middle, one near the end, and one under the caudal fin.
References[]
- ^ Ivanov, Alexander (30 August 2005). "Early Permian chondrichthyans of the Middle and South Urals". Revista Brasileira de Paleontologia. 8 (2): 127–138. doi:10.4072/rbp.2005.2.05. ISSN 1519-7530.
- ^ a b Kriwet, J.; Witzmann, F.; Klug, S.; Heidtke, U. H. (2007). "First direct evidence of a vertebrate three-level trophic chain in the fossil record". Proceedings. Biological Sciences. 275 (1631): 181–186. doi:10.1098/rspb.2007.1170. PMC 2596183. PMID 17971323.
- ^ a b c Beck, Kimberly; Soler-Gijon, Rodrigo; Carlucci, Jesse; Willis, Raymond (2014). "Morphology and histology of dorsal spines of the xenacanthid shark Orthacanthus platypternus from the Lower Permian of Texas, USA: Palaeobiological and palaeoenvironmental implications" (PDF). Acta Palaeontologica Polonica. doi:10.4202/app.00126.2014. S2CID 53979047.
{{cite journal}}: CS1 maint: url-status (link) - ^ Soler-Gijón, Rodrigo (December 2000). "Phylogenetic relationships of Lebachacanthidae [Soler-Gijón 1997] (Xenacanthiformes; Elasmobranchii)". PalZ. 74 (3): 363–377. doi:10.1007/BF02988107.
- ^ Hotton, Nicholas (1952). "Jaws and Teeth of American Xenacanth Sharks". Journal of Paleontology. 26 (3): 489–500. JSTOR 1299956.
{{cite journal}}: CS1 maint: url-status (link)
Further reading[]
- Long, John A.; Young, Gavin C. (May 1995). "Sharks from the Middle-Late Devonian Aztec Siltstone, southern Victoria Land, Antarctica" (PDF). Records of the Western Australian Museum. 17: 287–308. Retrieved 10 March 2022.
 | This article about a prehistoric shark is a stub. You can help Wikipedia by . |
- Permian sharks
- Prehistoric cartilaginous fish stubs
- Permian animal stubs