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The Info List - Romeriida





Romeriida
Romeriida
is a clade of reptiles that consists of diapsids and the extinct protorothyridid genus Paleothyris, if not the entire family Protorothyrididae. It is phylogenetically defined by Laurin & Reisz (1995) as the last common ancestor of Paleothyris
Paleothyris
and diapsids, and all its descendants.[1] It is named after Alfred Romer, a prominent vertebrate paleontologist of the twentieth century.[2] Protorothyridids were once placed in the family Romeriidae along with the captorhinid Romeria.[1] Because Romeria
Romeria
is now considered to be a captorhinid, and Captorhinidae
Captorhinidae
is placed outside Romeriida, the genus is excluded from the clade. Protorothyridids were once the collective term for several romeriid genera of uncertain classification. However, more recent studies have proposed that Protorothyrididae
Protorothyrididae
is a paraphyletic taxon.[3] Therefore, it is possible that many protorothyridids do not lie within the clade Romeriida. Several synapomorphies characterize the romeriids. These include the separation of the tabular bone from the opisthotic bone, ventrally keeled anterior pleurocentra, long and slender carpi and tarsi, and overlapping metapodials.[1] Below is a cladogram showing the placement of Romeriida
Romeriida
within Amniota, modified from Hill, 2005:[4]

Amniota 

Mesosauridae

Synapsida

 Reptilia 

Parareptilia

 Eureptilia 

Captorhinidae

 Romeriida

Paleothyris
Paleothyris
acadiana

Diapsida

Cladogram
Cladogram
after Müller & Reisz, 2006:[3]

Amniota

Synapsida

Reptilia

Parareptilia
Parareptilia
(including Mesosauridae)

 Eureptilia 

Coelostegus

Thuringothyris

Captorhinidae

Brouffia

 Romeriida

Paleothyris

Hylonomus

 Protorothyrididae

Anthracodromeus

Cephalerpeton

Protorothyris

Diapsida

   Polyphyletic Protorothyrididae References[edit]

^ a b c Laurin, M.; Reisz, R. (1995). "A reevaluation of early amniote phylogeny". Zoological Journal of the Linnean Society. 113 (2): 165–223. doi:10.1111/j.1096-3642.1995.tb00932.x.  ^ Gauthier, J. A.; Kluge, A. G.; Rowe, T. (1988). "The early evolution of the Amniota". In M. J. Benton (ed.). The Phylogeny and Classification of the Tetrapods, Volume 1: Amphibians, Reptiles, Birds. Systematics Association Special
Special
Volume. 35A. Clarendon Press. pp. 103–155. CS1 maint: Uses editors parameter (link) ^ a b Müller, J.; Reisz, R. R. (2006). "The phylogeny of early eureptiles: comparing parsimony and Bayesian approaches in the investigation of a basal fossil clade". Systematic Biology. 55 (3): 503–511. doi:10.1080/10635150600755396. PMID 16861212.  ^ Hill, R. V. (2005). "Integration of morphological data sets for phylogenetic analysis of Amniota: the importance of integumentary characters and increased taxonomic sampling". Systematic Biology. 54 (4): 530–547. doi:10.1080/10635150590950326. PMID 16085573. 

External links[edit]

Reptiles portal Paleontology portal

Romeriida
Romeriida
in the Paleobiology Database

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Eureptiles

Kingdom: Animalia Phylum: Chordata Class: Reptilia

†Basal eureptiles

Brouffia Coelostegus

†Captorhinidae

Acrodenta Baeotherates Captorhinikos Captorhinoides Captorhinus Concordia Gecatogomphius Kahneria Labidosaurus Opisthodontosaurus Protocaptorhinus  ?Puercosaurus Reiszorhinus Rhiodenticulatus  ?Riabininus Romeria Saurorictus Thuringothyris

†Moradisaurinae

Gansurhinus Labidosaurikos Moradisaurus Rothianiscus

Romeriida

†Hylonomus †Paleothyris

†Protorothyrididae

Anthracodromeus Cephalerpeton Protorothyris

Diapsida

†Araeoscelidia

Spinoaequalis Dictybolus

†Araeoscelidae

Aphelosaurus Araeoscelis Kadaliosaurus Zarcasaurus

†Petrolacosauridae

Petrolacosaurus

Neodiapsida

†Claudiosaurus †Kenyasaurus †Lanthanolania †Orovenator †Palaeagama †Saurosternon

†Tangasauridae

Acerosodontosaurus Hovasaurus Tangasaurus

†Younginidae

Galesphyrus Thadeosaurus Younginia

†Weigeltisauridae

Coelurosauravus Rautiania  ?Wapitisaurus Weigeltisaurus

†Ichthyosauromorpha

Hupehsuchia Cartorhynchus Ichthyopterygia

Sauria

Archosauromorpha

Includes Archosauria

includes dinosaurs, crocodilians and birds

Lepidosauromorpha

Includes Lepidosauria

includes scaled lizards

?Pantestudines

†Sauropterygia †?Eunotosaurus †Pappochelys †Odontochelys Testudinata

includes turtles

†?Thalattosauria

Askeptosauroidea Thalattosauroidea

Related categories

Prehistoric reptiles Carboniferous
Carboniferous
reptiles Permian
Permian
reptiles Triassic
Triassic
reptiles

Taxon identifiers

Wd: Q1061761 Fossilworks: 99771

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