Peirosauridae is a Gondwanan family of mesoeucrocodylians that lived during the Cretaceous period. It was a clade of terrestrial crocodyliforms that evolved a rather dog-like skull, and were terrestrial carnivores. It was phylogenetically defined in 2004 as the most recent common ancestor of Peirosaurus and Lomasuchinae and all of its descendants. Lomasuchinae is a subfamily of peirosaurids that includes the genus Lomasuchus.^[1]

Quick Facts Scientific classification, Genera ...

Peirosauridae Temporal range: Aptian–Maastrichtian PreꞒ Ꞓ O S D C P T J K Pg N
Skull of the peirosaurid Hamadasuchus rebouli on display at the Royal Ontario Museum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauria
Clade:	Pseudosuchia
Clade:	Crocodylomorpha
Clade:	Crocodyliformes
Suborder:	†Notosuchia
Clade:	†Sebecosuchia
Clade:	†Sebecia
Family:	†Peirosauridae Gasparini, 1982
Genera
†Amargasuchus †Miadanasuchus †Stolokrosuchus? †Trematochampsa? †Pepesuchinae †Barreirosuchus †Caririsuchus †Itasuchus †Pepesuchus †Roxochampsa †Peirosaurinae †Antaeusuchus? †Barcinosuchus †Barrosasuchus †Bayomesasuchus †Colhuehuapisuchus †Gasparinisuchus †Hamadasuchus †Kinesuchus †Lomasuchus †Montealtosuchus †Patagosuchus †Peirosaurus †Rukwasuchus †Uberabasuchus

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Lomasuchinae was defined in the same 2004 study as the most recent common ancestor of Lomasuchus and Mahajangasuchini and all of its descendants. Mahajangasuchini, also constructed in the study, was defined as the most recent common ancestor of Mahajangasuchus and Uberabasuchus and all of its descendants.^[1] However, all more recent phylogenetic analyses placed Mahajangasuchus within its own family, Mahajangasuchidae, along with the newly named Kaprosuchus.^[2][3][4]

The following list of genera follows Martinelli et al., 2012 unless otherwise noted.^[5]

• Antaeusuchus from the Cenomanian of Morocco.^[6]
• Barcinosuchus from the Aptian - Albian of Argentina.
• Bayomesasuchus from the Turonian - Cenomanian of Argentina.^[7]
• Barrosasuchus from the Santonian of Argentina.
• Caririsuchus from the lower Albian of Brazil.^[8]
• Colhuehuapisuchus from the Campanian- early Maastrichtian of Argentina.
• Gasparinisuchus from the Santonian - early Campanian of Argentina.
• Hamadasuchus from the Albian - Cenomanian of Morocco.
• Kinesuchus from the Santonian of Argentina.
• Lomasuchus from the Santonian of Argentina.
• Montealtosuchus from the Turonian - Santonian of Brazil.
• Patagosuchus from the Coniacian of Argentina.
• Peirosaurus from the late Maastrichtian of Brazil.
• Rukwasuchus from the Cenomanian of Tanzania.
• Uberabasuchus from the late Maastrichtian of Brazil.