Anatomy and Phylogenetic Relationships of Sclerosaurus armatus (Amniota: Parareptilia) from the Buntsandstein (Triassic) of Europe

  title={Anatomy and Phylogenetic Relationships of Sclerosaurus armatus (Amniota: Parareptilia) from the Buntsandstein (Triassic) of Europe},
  author={Hans‐Dieter Sues and Robert R. Reisz},
Abstract We present an anatomical redescription and reassessment of the phylogenetic relationships of Sclerosaurus armatus Meyer in Fischer, 1857, a parareptile from the Lower to lower Middle Triassic Buntsandstein of southern Germany and northern Switzerland. This taxon is distinguished from other known parareptiles by the possession of long, posterolaterally projecting spikes formed by supratemporals, posterior dentary teeth with mesiolingually aligned and slightly imbricating crowns, and a… 

Osteology of Leptopleuron lacertinum Owen, a procolophonoid parareptile from the Upper Triassic of Scotland, with remarks on ontogeny, ecology and affinities

  • Laura Säilä
  • Biology
    Earth and Environmental Science Transactions of the Royal Society of Edinburgh
  • 2010
The dentition and body shape of Leptopleuron imply it ate a diet of fibrous plant material or hard-shelled invertebrates and might have lived a burrowing lifestyle.

The Postcranial Skeleton of the Early Triassic Parareptile Sauropareion anoplus, with a Discussion of Possible Life History

The phylogenetic analysis of the Procolophonoidea is consonant with previous work, positing S. anoplus as the sister taxon to a clade composed of all other procolophonids exclusive of Coletta seca.

The Vertebrate Fauna of the Upper Permian of Niger—VII. Cranial Anatomy and Relationships of Bunostegos akokanensis (Pareiasauria)

The phylogenetic position of Bunostegos is addressed by incorporating it into a cladistic analysis of 29 parareptilian taxa (including all 21 currently valid pareiasaurs) and 127 cranial and postcranial characters, which place Bunostegal as more derived than middle Permian forms such as Bradysaurus and as the sister taxon to the clade including Deltavjatia plus Velosauria.

A potential record of a procolophonid parareptile from the Triassic of the Iberian Peninsula

Cranial and postcranial remains from the Middle Triassic of the Northeastern part of the Iberian Peninsula are reported and tentatively assigned to Procolophonidae. The finding is the first

Heteropelta boboi n. gen., n. sp. an armored archosauriform (Reptilia: Archosauromorpha) from the Middle Triassic of Italy

Heteropelta boboi is a new archosauriform reptile from the upper Anisian of northeastern Italy represented by a fragment of dorsal armor with a row of neural arches of the dorsal vertebrae. The

A procolophonid reptile from the Lower Triassic of Australia

A new procolophonid reptile from the Lower Triassic Arcadia Formation of Queensland, Australia is described on the basis of abundant cranial and postcranial remains, and its dentition suggests good capabilities of oral processing and shows instances of replacement.

Anatomy, cranial ontogeny and phylogenetic relationships of the pareiasaur Deltavjatia rossicus from the Late Permian of central Russia

  • L. A. Tsuji
  • Biology
    Earth and Environmental Science Transactions of the Royal Society of Edinburgh
  • 2013
A geometric morphometric analysis of the skull roof of Deltavjatia reveals an allometric increase in snout length and postorbital area, a result that can serve as a basis for examining morphological trends within pareiasaurs.

Mandaphon nadra, gen. et sp. nov., a New Procolophonid from the Manda Beds of Tanzania

  • L. A. Tsuji
  • Environmental Science, Geography
    Journal of Vertebrate Paleontology
  • 2017
ABSTRACT A collaborative field work program in the Triassic of Tanzania and Zambia has produced a plethora of new fossil material. Parareptiles, however, are rare, with only one procolophonoid

Eifelosaurus triadicus Jaekel, 1904, a “forgotten” reptile from the Upper Buntsandstein (Triassic: Anisian) of the Eifel region, Germany

We provide a detailed description of the poorly known reptile Eifelosaurus triadicus Jaekel, 1904 from the Upper Buntsandstein (Triassic: early Anisian) of Oberbettingen in the southwestern Eifel



A Reappraisal Of Coletta Seca, A Basal Procolophonoid Reptile From The Lower Triassic Of South Africa

A phylogenetic analysis identifies Coletta as the sister taxon of the clade Procolophonidae, and suggests that Procolophonoidea originated and diversified initially in Gondwana during the Permian, prior to ProColophonidae achieving a cosmopolitan distribution in the succeeding Triassic.

Procolophonidae (Reptilia: Parareptilia) from the Upper Triassic Wolfville Formation of Nova Scotia, Canada

ABSTRACT Late Triassic strata of the Wolfville Formation in Nova Scotia, Canada, have yielded numerous cranio-dental remains referable to three new taxa of Procolophonidae: Acadiella psalidodon,


A new phylogenetics analysis of Procolophonoidea, incorporating new phylogenetic characters from other studies, confirms the position of S. anoplus as the sister taxon of a clade comprising all procolophonoids exclusive of Coletta seca and Owenettidae and Procolophonidae are now sister taxa.

Anatomy and relationships of the Triassic temnospondyl Sclerothorax

A cladistic analysis of 18 taxa and 70 characters from all parts of the skeleton of Sclerothorax reveals that it is nested well within the higher stereospondyls, forming the sister taxon of capitosauroids.

Historical Burden In Systematics And The Interrelationships Of ‘Parareptiles’

Turtles are the highly modified survivors of a radiation of poorly‐known reptiles commonly called ‘parareptiles’, and the procolophonoid hypotheses is supported by only one synapomorphy (the slender stapes).

Pareiasaur phylogeny and the origin of turtles

Many features thought to be restricted to turtles (and thus to have evolved simultaneously with the turtle shell) actually arose earlier, at various points along the pareiasaurian stem lineage.


It is found that Macroleter is the taxon most closely related to pareiasaurs, which has important implications for the phylogeny of the Parareptilia as well as for the identity of a disputed element in the skull of pareiaaurs.

A reevaluation of early amniote phylogeny

It is indicated that three major clades of amniotes extend from the present to the Palaeozoic, and these three clades are the Synapsida (including Mammalia), Parareptilia (including Testudines), and Eureptili (including Sauria).

Researches on the Structure, Organization, and Classification of the Fossil Reptilia. VI. On the Anomodont Reptilia and Their Allies

The chief contributions to a knowledge of the Anomodont skull have been made by Sir Richard Owen, Professor Huxley, and Professor Cope, who said to show a blending of Chelonian and Lizard structures.

Les pareiasaures (Amniota, Parareptilia) du Permien supérieur du Bassin d'Argana, Maroc

The stapes, hitherto unknown in pareiasaurs, is described herein for the first time and displays a remarkably derived morphology, quite similar to that of the stapes of modern sauropsids.