Biology:Acantholipan

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Acantholipan is a genus of herbivorous nodosaurid dinosaur from Mexico from the early Santonian age of the Late Cretaceous. It includes one species, Acantholipan gonzalezi.[1]

Discovery and naming

Reconstructed skeleton in Museo del Desierto

In the north of Mexico, fragmentary fossils have been found of nodosaurids. A partial skeleton excavated at Los Primos near San Miguel in Coahuila, was described in 2011. When Rivera-Sylva and colleagues reported the discovery of this specimen, CPC 272, they initially considered it too fragmentary to name.[2] Later it was judged that the remains were sufficiently distinct to be given a binomial name.

In 2018, the type species Acantholipan gonzalezi was named by Rivera-Sylva et al. The generic name combines a Greek akanthos, "spine", with lipán, the usual Spanish designation of the Lépai-Ndé, the "Gray People", a tribe of the Apache inhabiting the area of the find. The specific name honours the Mexican paleontologist Arturo Homero González-González, the chairman of the Museo del Desierto at Saltillo. Acantholipan is the first ankylosaurian species named from Mexico.[1]

The holotype specimen, CPC 272, was found alongside another nodosaur, CPC 273, in a marine layer of the Pen Formation and dates from the Santonian. It consists of partial skeleton lacking the skull. Its remains include a back vertebra, a tail vertebra, a piece of a rib, the underside of the left humerus, an upper left ulna, the underside of the left femur and a spike-like osteoderm probably from the posterior thorax.[2] The fossil is part of the Colección Paleontológica de Coahuila, Museo del Desierto, Saltillo.[1]

Classification

Model in Museo del Desierto

Acantholipan belongs to the Nodosaurinae and is the sister taxon to Nodosaurus.[1] The 2018 phylogenetic analysis of Rivera-Sylva and colleagues is below:[1]

Nodosauridae
 
 

Sauroplites

 
 

Mymoorapelta

 
 

Dongyangopelta

 
 
 
 

Gastonia

 
 
 

Gargoyleosaurus

 
 
Polacanthinae
 

Hoplitosaurus

 
 

Polacanthus

 
 
Nodosaurinae
 

Peloroplites

 
 
 

Taohelong

 
 

Sauropelta

 
 
 

Acantholipan

 
 

Nodosaurus

 
 
 

Niobrarasaurus

 
 

Ahshislepelta

 
 
 
 

Tatankacephalus

 
 
 

Silvisaurus

 
 
 

CPC 273

 
 
Panoplosaurini
 

Animantarx

 
 
 

Panoplosaurus

 
 
 

Argentinian ankylosaur

 
 

Texasetes

 
 

Denversaurus

 
 

Edmontonia longiceps

 
 

Edmontonia rugosidens

 
 
 
 
Struthiosaurini
 
 

Hungarosaurus

 
 

Europelta

 
 
 
 

Pawpawsaurus

 
 

Stegopelta

 
 

Struthiosaurus languedocensis

 
 
 

Struthiosaurus transylvanicus

 
 

Struthiosaurus austriacus

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Rivera-Sylva, H.E.; Frey, E.; Stinnesbeck, W.; Carbot-Chanona, G.; Sanchez-Uribe, I.E.; Guzmán-Gutiérrez, J.R. (2018). "Paleodiversity of Late Cretaceous Ankylosauria from Mexico and their phylogenetic significance". Swiss Journal of Palaeontology 137 (1): 83–93. doi:10.1007/s13358-018-0153-1. ISSN 1664-2376. Bibcode: 2018SwJP..137...83R. 
  2. ↑ 2.0 2.1 Rivera-Sylva, H.E.; Carpenter, K.; Aranda-Manteca, F.J. (2011). "Late Cretaceous Nodosaurids (Ankylosauria: Ornithischia) from Mexico". Revista Mexicana de Ciencias Geológicas (Querétaro, Mexico: Universidad Nacional Autónoma de Mexico) 28 (3): 371–378. https://www.redalyc.org/pdf/572/57221165004.pdf. 
  1. REDIRECT Template:Ankylosauria

Wikidata ☰ Q54851240 entry