Dorsetochelys

{{Short description|Extinct genus of turtles}}

{{Automatic taxobox

| image = Dorsetochelys skull Dorset County Museum.JPG

| fossil_range = Late Jurassic-Early Cretaceous {{fossil range|145|143}}

| taxon = Dorsetochelys

| authority = Evans and Kemp, 1976

| subdivision_ranks = Species

| subdivision =

D. delairi Evans and Kemp, 1976 (type)

D. typocardium (Seeley, 1869)

D. bueckebergensis (Karl, Groning, Brauckmann, and Reich, 2012)

| synonyms =

Pleurosternon typocardium Seeley, 1869

Thalassemys ruetimeyeri Lydekker, 1889

Ballerstedtia Karl, Groning, Brauckmann, and Reich, 2012

}}

Dorsetochelys is an extinct genus of turtle from the Early Cretaceous of southern England and northwestern Germany.

Taxonomy

The type species, Dorsetochelys delairi, was described on the basis of DORCM G.23, a complete skull from the Early Cretaceous (Berriasian) Purbeck Group of Dorset, England.Evans and Kemp, 1976. A new turtle skull from the Purbeckian of England and a note on the early dichotomies of cryptodire turtles. Palaeontology, 19, 317–324. Later, a turtle skull from the vicinity of Como Bluff, Wyoming, was described as a new species, D. buzzops, in honor of Buzz Pitman, a museum director of the Rock River Museum near Como Bluff.R. T. Bakker. 1998. Dinosaur mid-life crisis: the Jurassic-Cretaceous transition in Wyoming and Colorado. Lower and Middle Cretaceous Terrestrial Ecosystems, New Mexico Museum of Natural History and Science Bulletin 14:67-77 However, a cladistic analysis conducted in 2013 recovered that species as a member of Baenidae, sister to Uluops.D. W. Larson, N. R. Longrich, D. C. Evans and M. J. Ryan. 2013. A new species of Neurankylus from the Milk River Formation (Cretaceous: Santonian) of Alberta, Canada, and a revision of the type species N. eximius. Morphology and Evolution of Turtles 389-405.

In 2012, pleurosternid remains were described from the Early Cretaceous (Berriasian) Bückeberg Formation of Lower Saxony, northwestern Germany, and this prompted a re-assessment of the problematic species "Pleurosternon" typocardium, which had been tentatively referred to Glyptops by Milner (2004).A. R. Milner. 2004. The turtles of the Purbeck Limestone Group of Dorset, southern England. Palaeontology 47(6):1441-1467 The new genus Ballerstedtia was coined for "P." typocardium, and the remains from Lower Saxony were named B. bueckergensis.H.-V. Karl, E. Groning, C. Brauckmann, and M. Reich. 2012. Ballerstedtia bueckebergensis, a new turtle from the Early Cretaceous Wealden facies of Germany (Testudines: Pleurosternidae). Studia Palaeocheloniologica 4:47-60. In a paper published in 2014, Ballerstedtia was synonymized with Dorsetochelys.A. Perez-Garcia. 2014. Revision of the poorly known Dorsetochelys typocardium, a relatively abundant pleurosternid turtle (Paracryptodira) in the Early Cretaceous of Europe. Cretaceous Research 49:152-162.

References