Acantholipan

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]

Acantholipan
Temporal range: Late Cretaceous,
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Ornithischia
Clade: Thyreophora
Suborder: Ankylosauria
Family: Nodosauridae
Subfamily: Nodosaurinae
Genus: Acantholipan
Rivera-Sylva et al., 2018
Type species
Acantholipan gonzalezi
Rivera-Sylva et al. 2018

Discovery and naming

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 Héctor Eduardo Rivera-Sylva, Eberhard Frey, Wolfgang Stinnesbeck, Gerardo Carbot-Chanona, Iván Erick Sanchez-Uribe and José Rubén Guzmán-Gutiárrez. The generic name combines a Greek akanthos, "spine", with lipan, 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

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. 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. S2CID 134924657.
  2. Rivera-Sylva, H.E.; Carpenter, K.; Aranda-Manteca, F.J. (2011). "Late Cretaceous Nodosaurids (Ankylosauria: Ornithischia) from Mexico" (PDF). Revista Mexicana de Ciencias Geológicas. Querétaro, Mexico: Universidad Nacional Autónoma de Mexico. 28 (3): 371–378.
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