On Taxonomic Affinity of Davletkulia gigantea Ivachnenko

Cover Page

Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription or Fee Access

Abstract

The holotype (an isolated tooth) of the largest-known member of the family Bolosauridae, Davletkulia gigantea Ivachnenko, 1990, of middle Permian Yaman-Yushatyr’ locality, Orenburg Region, Russia, is reassigned to the herbivorous dinocephalians of the superfamily Tapinocephaloidea. This attribution is supported by the shape of tooth crown, patterns of wear and resorption, as well as the absence of reparative (tertiary) dentine inside the pulp cavity at the late stage of tooth functioning. The morphology of the holotype reveals the validity of D. gigantea which thus is the third representative of the group after Ulemosaurus svijagensis and U. gigas which was described from Eastern Europe, and, judging by the Otcher age of type locality, the oldest-known tapinocephaloid of the regional tetrapod assemblages.

Full Text

Restricted Access

About the authors

V. V. Bulanov

Borissiak Paleontological Institute, Russian Academy of Sciences

Author for correspondence.
Email: bulanov@paleo.ru
Russian Federation, Moscow, 117647

References

  1. Голубев В.К. Пермские и триасовые хрониозухии и биостратиграфия верхнетатарских отложений Восточной Европы по тетраподам. М.: Наука, 2000. 174 с. (Тр. Палеонтол. ин-та РАН. Т. 276).
  2. Ивахненко М.Ф. Новые котилозавры Приуралья // Палеонтол. журн. 1973. № 2. С. 131–134.
  3. Ивахненко М.Ф. Раннепермские элементы фаунистических комплексов тетрапод Восточной Европы // Палеонтол. журн. 1990. № 2. С. 102–111.
  4. Ивахненко М.Ф., Голубев В.К., Губин Ю.М. и др. Пермские и триасовые тетраподы Восточной Европы. М.: ГЕОС, 1997. 216 с. (Тр. Палеонтол. ин-та РАН. Т. 268).
  5. Ивахненко М.Ф., Твердохлебова Г.И. Ревизия пермских болозавроморфов Восточной Европы // Палеонтол. журн. 1987. № 2. С. 98–106.
  6. Сенников А.Г. Ранние текодонты Восточной Европы. М.: Наука, 1995. 142 с. (Тр. Палеонтол. ин-та РАН. Т. 263).
  7. Сенников А.Г. Некоторые проблемы типологии сообществ наземных тетрапод // Эволюция биосферы и биоразнообразия. М.: Тов-во научн. изд. КМК, 2006. С. 359–372.
  8. Berman D.S., Sumida S.S., Henrici A.C. et al. The early Permian bolosaurid Eudibamus cursoris: earliest reptile to combine parasagittal stride and digitigrade posture during quadrupedal and bipedal locomotion // Front. Ecol. Evol. 2021. 18 p. https://doi.org/10.3389/fevo.2021.674173
  9. Beust T.B. Development of dentin sclerosis // J. Amer. Dent. Assoc. 1935. V. 22. № 7. P. 1186–1189.
  10. Bulanov V.V., Kovalenko E.S., MacDougall M.J. et al. Tooth replacement and reparative dentine formation in the middle Permian bolosaurids of European Russia // Hist. Biol. 2022. V. 35. № 5. P. 748–761. https://doi.org/10.1080/08912963.2022.2067752
  11. Cope E.D. Descriptions of the extinct Batrachia and Reptilia from the Permian formation of Texas // Proc. Amer. Phil. Soc. 1878. V. 17. № 101. P. 505–530.
  12. Fish E.W. Dead tracts in dentine // Proc. R. Soc. Med. 1928. V. 22. № 2. P. 227–235.
  13. LeBlanc A.R.H., Brink K.S., Whitney M.R. et al. Dental ontogeny in extinct synapsids reveals a complex evolutionary history of the mammalian tooth attachment system // Proc. R. Soc. Lond. Ser. B. 2018. V. 285: 20181792. http://dx.doi.org/10.1098/rspb.2018.1792
  14. Li J.L., Cheng Z.W. The first discovery of bolosaurs from Upper Permian of China // Vert. PalAsiat. 1995. V. 33. P. 17–23.
  15. Reisz R.R. Origin of dental occlusion in tetrapods: signal for terrestrial vertebrate evolution? // J. Exp. Zool. Ser. B. 2006. V. 306. P. 26–277.
  16. Reisz R.R., Barkas V., Scott D. A new Early Permian bolosaurid reptile from the Richards Spur Dolese Brothers Quarry, near Fort Sill, Oklahoma // J. Vertebr. Paleontol. 2002. V. 22. № 1. P. 23–28.
  17. Reisz R.R., Müller J., Tsuji L. et al. The cranial osteology of Belebey vegrandis (Parareptilia: Bolosauridae), from the Middle Permian of Russia, and its bearing on reptilian evolution // Zool. J. Linn. Soc. 2007. V. 151. P. 191–214.
  18. Sidor C.A., Angielczyk K.D., Smith R.H. et al. Tapinocephalids (Therapsida, Dinocephalia) from the Permian Madumabisa Mudstone Formation (Lower Karoo, Mid-Zambezi Basin) of Southern Zambia // J. Vertebr. Paleontol. 2014. V. 34. № 4. P. 980–986.
  19. Smith A.J., Cassidy N., Perry H. et al. Reactionary dentinogenesis // Int. J. Devel. Biol. 1995. V. 39. P. 273–280.
  20. Snyder A.J., LeBlanc A.R.H., Jun C. et al. Thecodont tooth attachment and replacement in bolosaurid parareptiles // PeerJ. 2020. https://doi.org/10.7717/peerj.9168
  21. Throckmorton G.S. The effect of wear on the cheek teeth and associated dental tissues of the lizard Uromastix aegyptius (Agamidae) // J. Morphol. 1979. V. 160. P. 195–208.
  22. Watson D.M.S. On Bolosaurus, and the origin and classification of reptiles // Bull. Mus. Comp. Zool. 1954. V. 111. № 9. P. 297–449.
  23. Whitney M.R., Sidor C.A. Histological and developmental insights into the herbivorous dentition of tapinocephalid therapsids // PlosOne. 2019. 21 p. https://doi.org/10.1371/journal.pone.0223860

Supplementary files

Supplementary Files
Action
1. JATS XML
Download
2. Fig. 1. Isolated teeth of East European Tapinocephaloidea: a–g – Davletkulia gigantea Ivachnenko, 1990, holotype PIN, No. 4311/1 (Orenburg Region, Yaman-Yushatyr locality; Upper Kazanian Substage – lower part of the Urzhumian Stage): a, b – from the sides, c – labially, d – from the occlusion angle; d–g – jaw teeth of Ulemosaurus svijagensis Riabinin, 1938 (Republic of Tatarstan, Isheevo locality; Urzhumian Stage): d – specimen PIN, No. 157/235, from the side; e, g – specimen PIN, No. 157/234, view from the occlusion angle and from the side, respectively. Designations: af – apical wear facet, cc – cellular cementum, ei – lower border of enamel, en – enamel, hf – heel wear surface, lf – lateral wear facet, r – proximal part of the labial root wall.

Download (369KB)
Indexing metadata
3. Fig. 2. Schemes of the arrangement of wear facets (from: Ivakhnenko, 1990, Fig. 2): a, b – in Belebey vegrandis Ivachnenko, 1973, specimen SSU, No. 104B/2022, from above and from the side, respectively (Orenburg region, Krymsky locality; middle Permian); c, d – in Davletkulia gigantea Ivachnenko, 1990, holotype PIN, No. 4311/1, from above and from the side, respectively. Legend: A, B, and C are similar wear areas.

Download (385KB)
Indexing metadata
4. Fig. 3. Davletkulia gigantea Ivachnenko, 1990, holotype PIN, no. 4311/1, CT reconstruction sections: a – cross-sections of the heel and apical part of the crown; b – horizontal section of the base of the apical part of the crown; c – vertical section along the long axis of the crown. Legend: af – apical wear facet, d – dentin, dt – damaged tracts, en – enamel, im – growth marks, lf – lateral wear facet, pc – pulp cavity, r – proximal part of the labial root wall.

Download (156KB)
Indexing metadata
5. Fig. 4. Morphology of the buccal teeth of Bolosauridae: a, b – Belebey vegrandis Ivachnenko, 1973, specimen SGU, No. 104B/2020 (Orenburg Region, Krymsky locality; Middle Permian), working structures of the crown and position of the tooth wear facets of the left dentale, view from the labial side and occlusal angle, respectively; c, d – Belebey sp. (Samara Region, Aksakovo locality; Middle Permian): c – specimen PIN, No. 5598/37, degree of crown wear of the replaced buccal tooth, lateral view; d – specimen PIN, No. 5598/86, replaced buccal tooth from the side of the pulp cavity. Designations: dv – distal cavity, fr1 (area “A” according to: Ivakhnenko, 1990) and fr2 – wear facets of the main ridge of buccal teeth at different stages of wear, ir – internal ridge, ma – main apex, mr – main ridge, pg – paraapical groove, pv – paraapical cavity, sa – additional (second) apex, sr – accessory ridge, td – tertiary dentin.

Download (448KB)
Indexing metadata

Copyright (c) 2024 Russian Academy of Sciences