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Adult morphology of the therocephalian Simorhinella baini from the middle Permian of South Africa and the taxonomy, paleobiogeography, and temporal distribution of the Lycosuchidae

Published online by Cambridge University Press:  14 July 2015

Fernando Abdala ,
Christian F. Kammerer ,
Michael O. Day ,
Sifelani Jirah  and
Bruce S. Rubidge
Fernando Abdala
Affiliation:
Evolutionary Studies Institute and School for Geosciences, University of the Witwatersrand, P. Bag 3, WITS 2050, Johannesburg, South Africa; ; ; ;
Christian F. Kammerer
Affiliation:
Museum für Naturkunde, Berlin Leibniz-Institut für Evolutions- und Biodiversitätsforschung an der Humboldt-Universität zu Berlin, Invalidenstraße 43, 10115 Berlin, Germany
Michael O. Day
Affiliation:
Evolutionary Studies Institute and School for Geosciences, University of the Witwatersrand, P. Bag 3, WITS 2050, Johannesburg, South Africa; ; ; ;
Sifelani Jirah
Affiliation:
Evolutionary Studies Institute and School for Geosciences, University of the Witwatersrand, P. Bag 3, WITS 2050, Johannesburg, South Africa; ; ; ;
Bruce S. Rubidge
Affiliation:
Evolutionary Studies Institute and School for Geosciences, University of the Witwatersrand, P. Bag 3, WITS 2050, Johannesburg, South Africa; ; ; ;
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Abstract

The Middle Permian tetrapod fauna of the South African Beaufort Group is taxonomically diverse and includes representatives of all major therapsid groups, including the earliest records of Eutheriodontia. In the Middle Permian, eutheriodonts are represented mainly by large therocephalians, which made up a large proportion of the vertebrate predators in these faunas. Here we describe the skull and partial skeleton of a large therocephalian from the uppermost Tapinocephalus Assemblage Zone (AZ) of South Africa. A combination of features, including the short snout, presence of three to four upper postcanines and presence of teeth on the pterygoid processes, indicates that the new specimen belongs to the earliest-diverging therocephalian family, Lycosuchidae. The presence of a well-developed midline ridge on the ventral surface of the vomer indicates that the new specimen can be referred to Simorhinella baini, a species previously represented only by a tiny juvenile skull. The new specimen forms the basis for a taxonomic re-evaluation of the Lycosuchidae as well as of the geographic and stratigraphic range of the family. We recognize two valid species within the Lycosuchidae: the type species Lycosuchus vanderrieti represented by five specimens and Simorhinella baini represented by two specimens, with an additional 22 specimens currently identifiable as Lycosuchidae incertae sedis. Lycosuchid specimens range throughout the Tapinocephalus and Pristerognathus AZs; specimens of Simorhinella are restricted to the Tapinocephalus AZ, whereas Lycosuchus specimens are documented in both the Tapinocephalus and Pristerognathus AZs.

Type
Research Article
Information
Journal of Paleontology , Volume 88 , Issue 6 , November 2014 , pp. 1139 - 1153
Copyright
Copyright © The Paleontological Society 

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References

Abdala, F. 2007. Redescription of Platycraniellus elegans (Therapsida, Cynodontia) from the Lower Triassic of South Africa and the cladistic relationships of Eutheriodontia. Palaeontology, 50:591–618.CrossRefGoogle Scholar
Abdala, F., Rubidge, B. S., and van den Heever, J. 2008. The oldest therocephalians (Therapsida, Eutheriodontia) and the early diversification of Therapsida. Palaeontology, 51:1011–1024.CrossRefGoogle Scholar
Abdala, F., Jashashvili, T., Rubidge, B. S., and van den Heever, J. 2014. New material of Microgomphodon oligocynus (Eutherapsida, Therocephalia) and the taxonomy of southern African Bauriidae, p. 209–231. In Kammerer, C. F., Angielczyk, K. D., and Fröbisch, J. (eds.), Early Evolutionary History of the Synapsida. Vertebrate Paleobiology and Paleoanthropology. Springer Dordrecht.CrossRefGoogle Scholar
Angielczyk, K. D., Huertas, S., Smith, R. M. H., Tabor, N. J., Sidor, C. A., Steyer, J. S., Tsuji, L. A., and Gostling, N. J. In press. New dicynodonts (Therapsida, Anomodontia) and updated tetrapod stratigraphy of the Permian Ruhuhu Formation (Songea Group, Ruhuhu Basin) of southern Tanzania. Journal of Vertebrate Paleontology.Google Scholar
Boonstra, L. D. 1934. A contribution to the morphology of the mammal-like reptiles of the suborder Therocephalia. Annals of the South African Museum, 31:215–267.Google Scholar
Boonstra, L. D. 1935. On some South African reptiles of the suborder Therocephalia preserved in the American Museum of Natural History. American Museum Novitates, 771:1–12.Google Scholar
Boonstra, L. D. 1953. The lower jaw articulatory region in some pristerognathid therocephalians. Annals of the South African Museum, 42:54–63.Google Scholar
Boonstra, L. D. 1954. The pristerognathid therocephalians from the Tapinocephalus-Zone in the South African Museum. Annals of the South African Museum, 42:65–107.Google Scholar
Boonstra, L. D. 1964. The girdles and limbs of pristerognathid Therocephalia. Annals of the South African Museum, 48:121–165.Google Scholar
Boonstra, L. D. 1969. The fauna of the Tapinocephalus Zone (Beaufort Beds of the Karoo). Annals of the South African Museum, 56:1–73.Google Scholar
Botha, J., Abdala, F., and Smith, R. 2007. The oldest cynodont: new clues on the origin and diversification of the Cynodontia. Zoological Journal of the Linnean Society, 149:477–492.CrossRefGoogle Scholar
Botha, J. and Angielczyk, K. D. 2007. An integrative approach to distinguishing the Late Permian dicynodont species Oudenodon bainii and Tropidostoma microtrema (Therapsida:Anomodontia). Palaeontology, 50:1175–1209.CrossRefGoogle Scholar
Botha-Brink, J. and Modesto, S. P. 2011. A new skeleton of the therocephalian synapsid Olivierosuchus parringtoni from the Lower Triassic Karoo Basin. Palaeontology, 54:591–606.CrossRefGoogle Scholar
Broom, R. 1903a. On an almost perfect skull of a new primitive theriodont (Lycosuchus vanderrieti). Transactions of the South African Philosophical Society, 14:197–205.CrossRefGoogle Scholar
Broom, R. 1903b. On some new primitive theriodonts in the South African Museum. Annals of the South African Museum, 4:147–158.Google Scholar
Broom, R. 1903c. On the classification of the theriodonts and their allies. Report of the South African Association for the Advancement of Science, 1:286–294.Google Scholar
Broom, R. 1904. On two new therocephalian reptiles (Glanosuchus macrops and Pristerognathus baini). Transactions of the South African Philosophical Society, 15:85–88.CrossRefGoogle Scholar
Broom, R. 1905. On the use of the term anomodont. Records of the Albany Museum, 1:266–269.Google Scholar
Broom, R. 1915. On some new carnivorous therapsids in the collection of the British Museum. Proceedings of the Zoological Society of London, 85:163–173.CrossRefGoogle Scholar
Broom, R. 1932. The mammal-like reptiles of South Africa and the origin of mammals. F, H. and Witherby, G., London, 376 p.Google Scholar
Broom, R. 1936. On some new genera and species of Karroo fossil reptiles with notes on some others. Annals of the Transvaal Museum, 18:349–385.Google Scholar
Cisneros, J. C., Abdala, F., Rubidge, B. S., Denzel Dias, P., and Oliveira Bueno, A. 2011. Dental occlusion in a 260 million year old therapsid, with saber canines, from the Permian of Brazil. Science, 331:1603–1605.CrossRefGoogle Scholar
Cisneros, J. C., Abdala, F., Atayman, S., Rubidge, B. S., Şengör, C., and Schultz, C. L. 2012. A carnivorous dinocephalian from the Middle Permian of Brazil and tetrapod dispersal in Pangaea. Proceedings of the National Academy of Sciences, 109:1584–1588.CrossRefGoogle ScholarPubMed
Cys, J. M. 1967. Osteology of the pristerognathid Cynariognathus platyrhinus (Reptilia:Theriodontia). Journal of Paleontology, 41:776–790.Google Scholar
Day, M. O. 2013. Middle Permian continental biodiversity changes as reflected in the Beaufort Group of South Africa: a bio- and lithostratigraphic review of the Eodicynodon, Tapinocephalus and Pristerognathus assemblage zones. Unpublished Ph.D. Dissertation, University of the Witwatersrand, Johannesburg, 387 p.Google Scholar
Day, M. O., Rubidge, B. S., Almond, J., and Jirah, S. 2013. Biostratigraphic correlation in the Karoo: the case of the Middle Permian parareptile Eunotosaurus . South African Journal of Science, 109, 4 p.CrossRefGoogle Scholar
Fourie, H. and Rubidge, B. S. 2009. The postcranial skeleton of the basal therocephalian Glanosuchus macrops (Scylacosauridae) and comparison of morphological and phylogenetic trends amongst the Theriodontia. Palaeontologia Africana, 44:27–39.Google Scholar
Haughton, S. A. 1915. On two new therocephalian from the Gouph. Annals of the South African Museum, 12:55–57.Google Scholar
Haughton, S. A. and Brink, A. S. 1954. A bibliographical list of Reptilia from the Karroo beds of Africa. Palaeontologia Africana, 2:1–187.Google Scholar
Huttenlocker, A. K. 2009. An investigation into the cladistic relationships and monophyly of therocephalian therapsids (Amniota: Synapsida). Zoological Journal of the Linnean Society, 157:865–891.CrossRefGoogle Scholar
Huttenlocker, A. K. 2014. Body size reductions in nonmammalian eutheriodont therapsids (Synapsida) during the end-Permian mass extinction. PLos One 9 (2):e87553.CrossRefGoogle ScholarPubMed
Huttenlocker, A. K., Sidor, C. A., and Smith, R. M. H. 2011. A new specimen of Promoschorhynchus (Therapsida: Therocephalia: Akidnognathidae) from the lowermost Triassic of South Africa and its implications for therocephalian survival across the Permo–Triassic boundary. Journal of Vertebrate Paleontology, 31:405–421.CrossRefGoogle Scholar
Ivakhnenko, M. F. 2011. Permian and Triassic Therocephals (Eutherapsida) of Eastern Europe. Palaeontological Journal, 45:981–1144.CrossRefGoogle Scholar
Jenkins, F. A. Jr. 1971. The postcranial skeleton of African cynodonts. Bulletin Peabody Museum of Natural History 36:1–216.Google Scholar
Kammerer, C. F. 2014. A redescription of Eriphostoma microdon Broom, 1911 (Therapsida, Gorgonopsia) from the Tapinocephalus Assemblage Zone of South Africa and a review of Middle Permian gorgonopsians, p. 171–184. In Kammerer, C. F., Angielczyk, K. D., and Fröbisch, J. (eds.), Early Evolutionary History of the Synapsida. Vertebrate Paleobiology and Paleoanthropology. Springer, Dordrecht.CrossRefGoogle Scholar
Kemp, T. S. 1969. On the functional morphology of the gorgonopsid skull. Philosophical Transactions of the Royal Society B, 256:1–83.Google Scholar
Kemp, T. S. 1972a. Whaitsiid Therocephalia and the origin of cynodonts. Philosophical Transactions of the Royal Society of London, 264:1–54.Google Scholar
Kemp, T. S. 1972b. The jaw articulation and musculature of the whaitsiid Therocephalia, p. 213–230. In Joysey, K. A. and Kemp, T. S. (eds.), Studies in Vertebrate Evolution. Oliver and Boyd, Edinburgh.Google Scholar
Kemp, T. S. 1986. The skeleton of a baurioid therocephalian therapsid from the Lower Triassic (Lystrosaurus Zone) of South Africa. Journal of Vertebrate Paleontology, 6:215–232.CrossRefGoogle Scholar
Kermack, K. 1956. Tooth replacement in mammal-like reptiles of the suborders Gorgonopsia and Therocephalia. Philosophical Transactions of the Royal Society of London, 240:95–133.Google Scholar
King, G. M. 1996. A description of the skeleton of a bauriid therocephalian from the Early Triassic of South Africa. Annals of the South African Museum, 104:379–393.Google Scholar
Kitching, J. W. 1977. The distribution of the Karroo vertebrate fauna. Bernard Price Institute for Palaeontological Research, University of the Witwatersrand, Memoir, 1.Google Scholar
Lanci, L., Tohver, E., Wilson, A., and Flint, S. 2013. Upper Permian magnetic stratigraphy of the lower Beaufort Group, Karoo Basin. Earth and Planetary Science Letters. http://dx.doi.org/10.1016/j.epsl.2013.05.017.CrossRefGoogle Scholar
Laurin, M. 1998. New data on the cranial anatomy of Lycaenops (Synapsida, Gorgonopsidae), and reflections on the possible presence of streptostyly in gorgonopsians. Journal of Vertebrate Paleontology 18:765–776.CrossRefGoogle Scholar
Liu, J., Rubidge, B. S., and Jinling, L. 2009. New basal synapsid supports Laurasian origin for therapsids. Acta Palaeontologica Polonica, 54:393–400.CrossRefGoogle Scholar
Mendrez, C. H. 1975. Principales variations du palais chez les thérocéphales Sud-Africains (Pristerosauria et Scaloposauria) au cours du Permien Superieur et du Trias Inférieur. Problémès Actuels de Paléontologie-Évolution des Vertébrés, Colloque International C.N.R.S., 218:379–408.Google Scholar
Mendrez-Carroll, C. H. 1979. Nouvelle étude du crâne du type de Scaloposaurus constrictus Owen, 1876 spécimen jeune, Therocephalia, Scaloposauria, Scaloposauridae de la zone à Cistecephalus (Permien supérieur) d'Afrique australe. Bulletin du Museum National d'Histoire Naturelle, Section C, 3:155–201.Google Scholar
Nicolas, M. V. M. 2007. Tetrapod biodiversity through the Permo-Triassic Beaufort Group (Karoo Supergroup) of South Africa. Unpublished Ph.D. Dissertation, University of the Witwatersrand, Johannesburg, 668 p.Google Scholar
Nopsca, F. 1923. Die Familien der Reptilien. Verlag von Gebrüder Borntraeger, Berlin, 210 p.Google Scholar
Olson, E. C. 1944. Origin of mammals based upon cranial morphology of the therapsid suborders. Geological Society of America Special Papers, 55:1–136.CrossRefGoogle Scholar
Rubidge, B. S. 2005. Re-uniting lost continents—fossil reptiles from the ancient Karoo and their wanderlust. South African Journal of Geology, 108:135–172.CrossRefGoogle Scholar
Rubidge, B. S., Erwin, D. H., Ramezani, J., Bowring, S. A., and De Klerk, W. J., 2013. High-precision temporal calibration of Late Permian vertebrate biostratigraphy: U-Pb zircon constraints from the Karoo Supergroup, South Africa. Geology, 41:363–366.CrossRefGoogle Scholar
Rubidge, B. S., Johnson, M. R., Kitching, J. W., Smith, R. M. H., Keyser, A. W., and Groenewald, G. H. 1995. An introduction to the biozonation of the Beaufort Group, p. 1–2. In Rubidge, B. S. (ed.), Biostratigraphy of the Beaufort Group (Karoo Supergroup). South African Committee for Stratigraphy, Biostratigraphic Series, 1.Google Scholar
Shen, S-Z., Schneider, J. W., Angiolini, L., and Henderson, C. M. 2013 . The International Permian Timescale: March 2013 Update, p. 411–416. In Lucas, S. G. et al. (eds.), The Carboniferous-Permian Transition. New Mexico Museum of Natural History and Science, Bulletin 60.Google Scholar
Sidor, C. A., Angielczyk, K. D., Smith, R. M. H., Steyer, J. S., Nesbitt, S. J., Peecook, B. R., Goulding, A. K., and Tolan, S. 2014. Tapinocephalids (Therapsida: Dinocephalia) from the Permian Madumabisa Mudstone Formation (Lower Karoo, Mid-Zambezi Basin) of southern Zambia. Journal of Vertebrate Paleontology, 34:980–986.CrossRefGoogle Scholar
Simon, R. V., Sidor, C. A., Angielczyk, K. D., and Smith, R. M. H. 2010. First record of a tapinocephalid (Therapsida: Dinocephalia) from the Ruhuhu Formation (Songea Group) of southern Tanzania. Journal of Vertebrate Paleontology 30:1289–1293.CrossRefGoogle Scholar
Sigurdsen, T. 2006. New features of the snout and orbit of a therocephalian therapsid from South Africa. Acta Palaeontologica Polonica 51:63–75.Google Scholar
Sigurdsen, T., Huttenlocker, A. K., Modesto, S. P., Rowe, T. B., and Damiani, R. 2012. Reassessment of the morphology and paleobiology of the therocephalian Tetracynodon darti (Therapsida), and the phylogenetic relationships of Baurioidea. Journal of Vertebrate Paleontology 32:1113–1134.CrossRefGoogle Scholar
Smith, R. M. H. and Keyser, A. 1995. Biostratigraphy of the Tapinocephalus Assemblage Zone, p. 8–12. In Rubidge, B. S. (ed.), Biostratigraphy of the Beaufort Group (Karoo Supergroup) Pretoria, South African Committee for Stratigraphy, Biostratigraphic Series 1.Google Scholar
Smith, R. M. H., Rubidge, B. S., and van der Walt, M. 2012. Therapsid biodiversity patterns and palaeoenvironments of the Karoo Basin, South Africa, p. 31–62. In Chinsamy-Turan, A. (ed.), Forerunners of Mammals. Radiation. Histology. Biology. Indiana University Press, Blomington.Google Scholar
van den Heever, J. A. 1980. On the validity of the therocephalian Family Lycosuchidae (Reptilia, Therapsida). Annals of the South African Museum, 81:111–125.Google Scholar
van den Heever, J. A. 1987. The comparative and functional cranial morphology of the early Therocephalia (Amniota: Therapsida). Unpublished Ph.D. Dissertation. University of Stellenbosch, Stellenbosch, 576 p.Google Scholar
van den Heever, J. A. 1994. The cranial anatomy of the early Therocephalia (Amniota: Therapsida). Annals of the University of Stellenbosch, 1:1–59.Google Scholar
van den Heever, J. A. and Hopson, J. A. 1982. The systematic position of “Therocephalia B” (Reptilia: Therapsida). South African Journal of Science, 78:424–425.Google Scholar
van der Walt, M., Day, M., Rubidge, B. S., Cooper, A. K., and Netterberg, I. 2010. A new GIS based biozone map of the Beaufort Group (Karoo Supergroup), South Africa. Palaeontologia Africana, 45:1–5.Google Scholar
Watson, D. M. S. 1931. On the skeleton of a bauriamorph reptile. Proceedings of the Zoological Society of London, 1931:1163–1205.CrossRefGoogle Scholar
Watson, D. M. S. and Romer, A. S. 1956. A classification of therapsid reptiles. Bulletin of the Museum of Comparative Zoology, 114:37–89.Google Scholar