ⓘ Rotaurisaurus

                                     

ⓘ Rotaurisaurus

Rotaurisaurus is an extinct genus of amphibian-grade tetrapod from the family Lapillopsidae. This genus is known only from an incomplete crushed skull and associated left jaw, together given the designation UTGD 87795. The generic name, Rotaurisaurus, is a combination of Latin words translating to "circle-eared lizard". This references the shape of its otic notches, which acquire a circular form due to being partially enclosed by the tabular bones at the back of the skull. The specific name, contundo, references the specimens poor level of preservation, as it is derived from the Latin word for "squashed".

The skull was discovered in 1960 on the clear and Gunn quarry, near Hobart, Tasmania. This quarry contains layers of rock from the Knocklofty formation, which refers to the beginning of the Triassic period. For many years, this skull is believed to belong to a minor Chomatobatrachus halei, is a kind of common lydekkerinid in Tasmania the quarry. He was listed as such in John review Cosgriffs 1974 Tasmania temnospondyls. In Rotaurisaurus sample is contained in a minimized unit of red siltstone, which were originally covered with gray siltstone formations poets-members of traffic. Poets-members of the road contains such fossils as the skeleton of early archosaurs relatively Tasmaniosaurus triassicus, and is believed to hail from the beginning of the Induan and early Olenekian age of the early Triassic, about 250 million years ago.

In 1999, Adam Yates found that the skull represents a new genus and specific difference from Chomatobatrachus. He made an Alliance with a mysterious Australian Lapillopsis temnospondyl, and formulated a new family Lapillopsidae to contain two genera. Rotaurisaurus had an unusual form of tabular bones, which are usually formed by a triangular horn-like structures along the rear edge of the skull. In Rotaurisaurus, the bones are bent outwards, to enclose the adjacent light-guiding notches on the back of the head. Other unique features include the presence of a longitudinal ridge on the outer surface of each quadratojugal bone, which was located near the joints of the skull, and edge of bone behind orbit eye holes.

                                     
  • is a family of Temnospondyli. Lapillopsis was found as the sister to Rotaurisaurus in a 1999 analysis that found the Lapillopsidae as basal stereospondyls
  • The type species is L. nana. Lapillopsis was found as the sister to Rotaurisaurus in a 1999 analysis that found the Lapillopsidae as basal stereospondyls
  • Rhinesuchoides Rhinesuchus Rhinophrynus Rhynchonkos Rhytidosteus Ricnodon Rotaurisaurus Rubricacaecilia Saevesoederberghia Saharastega Salamandra Sanyanlichan