Biology:Paraorthacodus
| Paraorthacodus | |
|---|---|
| |
| Paraorthacodus jurensis holotype specimen | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Family: | †Paraorthacodontidae |
| Genus: | †Paraorthacodus Glückman, 1957 |
| Species | |
|
P. andersoni | |
Paraorthacodus is an extinct genus of cartilaginous fish. It a member of the family Paraorthacodontidae[1][2] (though it was formerly regarded as a member of the family Palaeospinacidae[3]), which is either placed in Hexanchiformes[2] or in Synechodontiformes.[1] It is known from 11 species[3] spanning from the Early Jurassic[4] to the Eocene.[3] Full body fossils from the Late Jurassic of Germany suggest that juveniles had a robust body with a round head, while adults had large body sizes with tapered bodies.[1] There was only a single dorsal fin towards the back of the body without a fin spine.[3] The dentition had teeth with a single large central cusp along with shorter lateral cusplets[3], which where designed for clutching.[1]
References
- ↑ 1.0 1.1 1.2 1.3 Villalobos-Segura, Eduardo; Stumpf, Sebastian; Türtscher, Julia; Jambura, Patrick L.; Begat, Arnaud; López-Romero, Faviel A.; Fischer, Jan; Kriwet, Jürgen (March 2023). "A Synoptic Review of the Cartilaginous Fishes (Chondrichthyes: Holocephali, Elasmobranchii) from the Upper Jurassic Konservat-Lagerstätten of Southern Germany: Taxonomy, Diversity, and Faunal Relationships" (in en). Diversity 15 (3): 386. doi:10.3390/d15030386. ISSN 1424-2818. https://www.mdpi.com/1424-2818/15/3/386.
- ↑ 2.0 2.1 Cione, Alberto L.; Santillana, Sergio; Gouiric-Cavalli, Soledad; Acosta Hospitaleche, Carolina; Gelfo, Javier N.; López, Guillermo M.; Reguero, Marcelo (2018-05). "Before and after the K/Pg extinction in West Antarctica: New marine fish records from Marambio (Seymour) Island" (in en). Cretaceous Research 85: 250–265. doi:10.1016/j.cretres.2018.01.004. https://linkinghub.elsevier.com/retrieve/pii/S0195667117303865.
- ↑ 3.0 3.1 3.2 3.3 3.4 Klug, Stefanie; Kriwet, JüRgen; BöTtcher, Ronald; Schweigert, GüNter; Dietl, Gerd (2009-09). "Skeletal anatomy of the extinct shark Paraorthacodus jurensis (Chondrichthyes; Palaeospinacidae), with comments on synechodontiform and palaeospinacid monophyly" (in en). Zoological Journal of the Linnean Society 157 (1): 107–134. doi:10.1111/j.1096-3642.2009.00534.x. https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2009.00534.x.
- ↑ Guinot, Guillaume; Cappetta, Henri; Adnet, Sylvain (2014-03). "A rare elasmobranch assemblage from the Valanginian (Lower Cretaceous) of southern France" (in en). Cretaceous Research 48: 54–84. doi:10.1016/j.cretres.2013.11.014. https://linkinghub.elsevier.com/retrieve/pii/S0195667113001869.
Wikidata ☰ Q7135603 entry
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