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Extinct family of reptiles From Wikipedia, the free encyclopedia
Machimosauridae is an extinct family of teleosauroid thalattosuchian crocodyliforms.[1] The family was first identified in 2016,[2] when fossils of teleosauroid thalattosuchians, including an indeterminate close relative of Lemmysuchus and Machimosaurus, were described from the Middle Jurassic (Bathonian) of Morocco.[2] The family was largely expanded in 2020 when the systematics of Teleosauroidea were re-reviewed.[1] Members of this family generally were larger than the teleosaurids.[1]
Machimosauridae Temporal range: Early Jurassic-Early Cretaceous, | |
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Macrospondylus bollensis | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Clade: | Archosauria |
Clade: | Pseudosuchia |
Clade: | Crocodylomorpha |
Clade: | Crocodyliformes |
Suborder: | †Thalattosuchia |
Superfamily: | †Teleosauroidea |
Family: | †Machimosauridae Jouve et al., 2016 |
Subgroups | |
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Machimosauridae is a diverse group of teleosauroids, phylogenetically defined as "the largest clade within Teleosauroidea containing Machimosaurus hugii, but not Plagiophthalmosuchus gracilirostris and Teleosaurus cadomensis."[1] The members of the Machimosauridae share several unique characters among teleosauroids, which are:[1]
The phylogenetic relationships of the Machimosauridae were analyzed in a comprehensive analysis of teleosauroid relationships. The results of the analysis are shown below:[1]
Machimosauridae |
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Machimosaurids grew in body size and diversified feeding strategies throughout their evolutionary history. Primitive machimosaurids, such as Macrospondylus and Charitomenosuchus, were longirostrine (long-snouted) generalists with body lengths less than 5 m (16 ft) long.[1][3] Machimosaurines originated in the Bathonian stage of the Middle Jurassic and simultaneously underwent a decrease in snout length but an increase in body size with Neosteneosaurus reaching up to 6.6 m (22 ft) long.[1][3] Machimosaurins were the largest teleosauroids, with body lengths up to 7.1 m (23 ft) (Machimosaurus rex), and were durophagous hunters, meaning they fed on hard prey.[1][3]
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