# Adamanasuchus

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Extinct genus of reptiles

Adamanasuchus Temporal range: Late Triassic, 222–216.5 Ma PreꞒ Ꞓ O S D C P T J K Pg N I O An. La. Carn. Norian Rh. A reconstruction of Adamanasuchus created by superimposing described fossils over Desmatosuchus which is a close relative Scientific classification Kingdom: Animalia Phylum: Chordata Class: Reptilia Clade: Pseudosuchia Order: †Aetosauria Family: †Stagonolepididae Genus: †Adamanasuchus Lucas, Hunt & Spielmann, 2007 Type species †Adamanasuchus eisenhardtae Lucas, Hunt & Spielmann, 2007

***Adamanasuchus*** is an [extinct](/source/Extinct) [genus](/source/Genus) of [aetosaur](/source/Aetosaur) that lived during the [Late Triassic](/source/Late_Triassic) period around 222-216.5 million years ago. [Fossils](/source/Fossil) have been found from several localities from the [Chinle Group](/source/Chinle_Group) in [Arizona](/source/Arizona)[1] and date back to the late [Carnian](/source/Carnian) stage of the [Late Triassic](/source/Late_Triassic).[2] The locality from which it was named after also lends its name to the [Adamanian](/source/Adamanian) LVF ([land vertebrate faunachron](/source/Land_vertebrate_faunachron)).

## Description

It was a relatively large genus of aetosaur with unique armor plating. The dorsal armor of Adamanasuchus are distinctive and represent a mosaic of features only found on few aetosaur genera showing that the evolution of aetosaur armor was complex.[2]

This genus is known from partial fossil material of the dorsal armor, caudal vertebrae and a femur. It can be distinguished from other aetosaur genera by several characteristics. The paramedian osteoderms are narrow (~200-225 mm) and arched at a ~30º angle with sparse pitting and faint ridges that are distributed in a limited radial pattern, raised anterior bars, ventral keels, and a ridge or eminence that meets with the posterior edge of the osteoderm, and lateral osteoderms with low, pyramidal spikes that are sparsely distributed pits, faint ridges and relatively shallow arching.[2]

## Paleobiology

Adamanasuchus lived in what is now [Arizona](/source/Arizona) during the [Late Triassic](/source/Late_Triassic) period in the [Chinle Formation](/source/Chinle_Formation). It lived at the same time of many different genera of aetosaurs such as [Longosuchus](/source/Longosuchus), [Coahomasuchus](/source/Coahomasuchus), [Stagonolepis](/source/Stagonolepis), [Desmatosuchus](/source/Desmatosuchus), [Tecovasuchus](/source/Tecovasuchus), [Paratypothorax](/source/Paratypothorax), [Typothorax](/source/Typothorax), [Rioarribasuchus](/source/Rioarribasuchus), [Aetosaurus](/source/Aetosaurus), and [Redondasuchus](/source/Redondasuchus).[1]

## References

1. ^ [***a***](#cite_ref-:1_1-0) [***b***](#cite_ref-:1_1-1) [Heckert, A. B., Lucas, S. G., Hunt, A. P., and Spielmann, J. A. (2007). Late Triassic aetosaur biochronology revised.](https://www.researchgate.net/publication/237329977_LATE_TRIASSIC_AETOSAUR_BIOCHRONOLOGY_REVISITED) *In:* Lucas, S.G. and Spielmann, J.A., eds., *The Global Triassic*. New Mexico Museum of Natural History and Science Bulletin 41.

1. ^ [***a***](#cite_ref-:0_2-0) [***b***](#cite_ref-:0_2-1) [***c***](#cite_ref-:0_2-2) [Lucas, S. G., Hunt, A. P., and Spielmann, J. A. (2007). A new aetosaur from the Upper Triassic (Adamanian: Carnian) of Arizona.](https://www.researchgate.net/publication/281820635_A_new_aetosaur_from_the_Upper_Triassic_Adamanian_Carnian_of_Arizona) *In:* Lucas, S. G. and Spielmann, J. A., eds., *Triassic of the American West*. New Mexico Museum of Natural History & Science, Bulletin 40 p. 241-247

v t e Aetosauria Kingdom: Animalia Phylum: Chordata Class: Sauropsida Clade: Pseudosuchia Clade: Aetosauriformes Pseudosuchia see Pseudosuchia Aetosauria see below↓ Aetosauria †Aetosauria Aetosauroides Stagonolepididae Aetosaurinae Aetosaurus Coahomasuchus? Stenomyti? Typothoracinae? Apachesuchus Chilenosuchus? Gorgetosuchus? Kryphioparma Redondasuchus Typothorax Paratypothoracini Garzapelta? Kocurypelta Kuttysuchus Paratypothorax Rioarribasuchus Tecovasuchus Venkatasuchus Desmatosuchia Stagonolepidinae? Polesinesuchus Stagonolepis Desmatosuchinae sensu lato Adamanasuchus? Aetobarbakinoides? Calyptosuchus? Chilenosuchus? Neoaetosauroides? Olkasuchus Scutarx? Desmatosuchini (Desmatosuchinae sensu stricto) Desmatosuchus Gorgetosuchus? Longosuchus Lucasuchus Sierritasuchus Category

Taxon identifiers Adamanasuchus Wikidata: Q1064172 GBIF: 8591774 IRMNG: 1469959 Open Tree of Life: 6148444 Paleobiology Database: 161894

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Adapted from the Wikipedia article [Adamanasuchus](https://en.wikipedia.org/wiki/Adamanasuchus) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Adamanasuchus?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.