Biology:Acanthorhachis
| Acanthorhachis | |
|---|---|
| |
Scientific classification 
| |
| Missing taxonomy template (fix): | Incertae sedis/Chondrichthyes |
| Family: | †Listracanthidae |
| Genus: | †Acanthorhachis Martill, Del Strother, & Gallien, 2013 |
| Species: | †A. spinatus
|
| Binomial name | |
| †Acanthorhachis spinatus (Bolton, 1896) Martill, Del Strother, & Gallien, 2013
| |
Acanthorhachis is an enigmatic extinct genus of chondrichthyan from the Carboniferous period.[1] Its name is derived from the Greek word acanthos meaning "spine" and the Greek suffix for spine, -rhachis. This is due to the spine-like dermal denticles and their subsidiary spines, which coated the exterior of the animal. The authors who erected this genus suggested the common name "The Spiny Spined Shark." The type species Listracanthus spinatus was in 1896 named by Herbert Bolton.
It is closely related to Listracanthus. It differs from it in the size, structure, and distribution of dermal spines. It is currently monotypic, containing only the species A. spinatus. This shark is thus far only described from the British Isles. Acanthorhachis was first described from the Westphalian-aged lower coal measures of Yorkshire, England.[2] It occurs rarely in Viséan-aged Eyam Limestone of Derbyshire, England.[3]
References
- ↑ "Fossilworks: Acanthorhachis". http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=289828.
- ↑ MARTILL, DAVID M.; DEL STROTHER, PETER J. A.; GALLIEN, FLORENCE (2013-07-08). "Acanthorhachis, a new genus of shark from the Carboniferous (Westphalian) of Yorkshire, England". Geological Magazine 151 (3): 517–533. doi:10.1017/s0016756813000447. ISSN 0016-7568. http://dx.doi.org/10.1017/s0016756813000447.
- ↑ Smith, Roy; Martill, David M.; Duffin, Christopher (2017-06-01). "The shark-beds of the Eyam Limestone Formation (Lower Carboniferous, Viséan) of Steeplehouse Quarry, Wirksworth, Derbyshire, UK" (in en). Proceedings of the Geologists' Association 128 (3): 374–400. doi:10.1016/j.pgeola.2017.04.004. ISSN 0016-7878. http://www.sciencedirect.com/science/article/pii/S0016787817300548.
Wikidata ☰ Q22102494 entry
 |  |
