# Sierritasuchus

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Extinct genus of reptiles

Sierritasuchus Temporal range: Late Triassic Scientific classification Kingdom: Animalia Phylum: Chordata Class: Reptilia Clade: Pseudosuchia Order: †Aetosauria Family: †Stagonolepididae Subfamily: †Desmatosuchinae Genus: †Sierritasuchus Parker et al., 2008 Species †S. macalpini Parker et al., 2008 (type)

***Sierritasuchus*** is an extinct [genus](/source/Genus) of [aetosaur](/source/Aetosaur) in the [subfamily](/source/Subfamily) [Desmatosuchinae](/source/Desmatosuchinae). It is known from a small [holotype](/source/Holotype) skeleton from the [Late Triassic](/source/Late_Triassic) [Tecovas Formation](/source/Tecovas_Formation) of [Texas](/source/Texas). This skeleton (known as UMMP V60817) was discovered in 1939 and was originally assigned to the genus *[Desmatosuchus](/source/Desmatosuchus)*. It was placed in its own genus in 2008 after having been in the collections of the [University of Michigan Museum of Paleontology](/source/University_of_Michigan_Museum_of_Paleontology), with the [type species](/source/Type_species) being *S. macalpini*.[1] The generic name refers to Sierrita de la Cruz Creek where the holotype was found, and the specific name refers to [Archie MacAlpin](https://en.wikipedia.org/w/index.php?title=Archie_MacAlpin&action=edit&redlink=1), who discovered the skeleton.[2] Based on the [histology](/source/Histology) of the [scutes](/source/Scute) of the holotype, the individual was a subadult that was not fully grown.[1]

*Sierritasuchus* can be distinguished from other aetosaurs by several unique features as well as a distinct combination of features in its scutes. Unlike other aetosaurs, *Sierritasuchus* has recurved spines along its side that are serrated on the front edges. Additionally, there is a distinct ridge on the posterior surface of each dorsal eminence. Dorsal eminences are small projections on the surfaces of paramedian scutes that line the back of the animal on either side of the [vertebral column](/source/Vertebral_column). In *Sierritasuchus*, the dorsal eminence touches the posterior margin of the paramedian scute. Each paramedian scute is covered in a random pattern of pits. Both the paramedian and lateral scutes (which run along the side of the animal beneath the paramedians) have anterior bars.[1]

## References

1. ^ [***a***](#cite_ref-PSI08_1-0) [***b***](#cite_ref-PSI08_1-1) [***c***](#cite_ref-PSI08_1-2) Parker, W. G.; Stocker, M. R.; Irmis, R. B. (2008). "A new desmatosuchine aetosaur (Archosauria; Suchia) from the Upper Triassic Tecovas Formation (Dockum Group) of Texas". *Journal of Vertebrate Paleontology*. **28** (2): 692–701. [doi](/source/Doi_(identifier)):[10.1671/0272-4634(2008)28\[692:ANDAAS\]2.0.CO;2](https://doi.org/10.1671%2F0272-4634%282008%2928%5B692%3AANDAAS%5D2.0.CO%3B2). [S2CID](/source/S2CID_(identifier)) [84455880](https://api.semanticscholar.org/CorpusID:84455880).

1. **[^](#cite_ref-2)** Parker, B. (25 September 2008). ["Introducing *Sierritasuchus macalpini*"](https://chinleana.blogspot.com/2008/09/introducing-sierritasuchus-macalpini.html). *Chinleana*. Retrieved 4 July 2010.

## External links

- [*Sierritasuchus*](http://pbdb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=138437&is_real_user=1) in the [Paleobiology Database](/source/Paleobiology_Database)

- [Paleontology portal](https://en.wikipedia.org/wiki/Portal:Paleontology)

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 Sierritasuchus Wikidata: Q3281017 GBIF: 4967764 IRMNG: 1477960 Open Tree of Life: 4128051 Paleobiology Database: 138437

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