Anakamacops

Anakamacops Temporal range: Guadalupian, 270 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Order:	†Temnospondyli
Family:	†Dissorophidae
Genus:	†Anakamacops Li and Cheng, 1999
Species
†A. petrolicus Li and Cheng, 1999 (type)

Anakamacops (meaning "similar to Kamacops" in Greek) is a genus of dissorophid temnospondyl from the early Middle Permian of China. It is known from the right side of a snout that was described in 1999 from the Dashankou locality of the Xidagou Formation, which is within the city of Yumen. The type species was named A. petrolicus because Yumen is an oil-producing city (petrol).[1] More substantial material, including a partial skull and partial mandibles, was described by Liu (2018).[2]

Description

Anakamacops is most similar to Kamacops, sharing features such as a choana widely separated from the interpterygoid vacuities and extensive exostosis ornamenting the skull roof. Both are large taxa; the most complete specimen of Anakamacops measures 26 cm in length despite lacking most of the snout. A number of potentially unique features were suggested based on the additional material described by Liu (2018), such as a relatively edentulous (lacking teeth) vomer and paired (rather than a single, unpaired) occipital ridge.

Phylogenetic analysis from Liu (2018)

Dissorophidae	Platyhystrix rugosus Aspidosaurus binasser Dissorophinae Broiliellus reiszi Broiliellus brevis Broiliellus texensis Broiliellus olsoni Dissorophus multicinctus Brevidorsum profundum Reiszerpeton renascentis Conjunctio multidens Scapanops neglecta Eucacopinae Cacops aspidephorus Cacops morrisi Cacops woehri Kamacopini Zygosaurus lucius Kamacops acervalis Anakamacops petrolicus

References

1. Li, J.-L.; Cheng, Z.W. (1999). "New anthracosaur and temnospondyl amphibians from Gansu, China - the fifth report on Late Permian Dashankou lower tetrapod fauna" (PDF). Vertebrata PalAsiatica. 37 (3): 234–247.
2. Liu, Jun (2018-11-05). "Osteology of the large dissorophid temnospondyl Anakamacops petrolicus from the Guadalupian Dashankou Fauna of China". Journal of Vertebrate Paleontology. 38 (5): e1513407. doi:10.1080/02724634.2018.1513407. ISSN 0272-4634.