Paleontological Journal

, Volume 52, Issue 13, pp 1637–1646 | Cite as

Semantor macrurus Orlov, 1931 (Carnivora, Mustelidae): Morphology of the Hind Limb and a New View on Its Paleobiology

  • A. V. LavrovEmail author
  • K. K. Tarasenko
  • A. N. Vlasenko


Based on the analysis of joints morphology in the hind limb of Semantor macrurus, it is established that the amplitude of flexion–extension mobility in the hip, knee (stifle), and talocrural (ankle) joints could have reached 90°; the adduction–abduction mobility in the hip joint was up to 60° and, in the talocrural joint, up to 65°. The talocrural joint is hinged and multiaxial, providing a wide range of movements of the autopodium in the course of aquatic locomotion. The hind limb is of the free type. The exterior of Semantor resembles that of otter. The increased length of the crus suggests that the limb was adapted for stroke function (rowing).


Mustelidae morphology aquatic adaptations Late Miocene Gusinyi Perelet Kazakhstan 



We are grateful to S.V. Kruskop, S.V. Volkov, V.S. Lebedev, V.E. Litvin, and A.A. Lisovsky (ZM MGU) for help during our work; to A.O. Averia-nov, A.N. Tikhonov, and M.V. Sablin (ZIN) for an opportunity to examine the collection and fruitful discussions.

This study was supported in part by the Program of Basic Research of the Department of Biological Sciences of the Russian Academy of Science “Biodiversity of Natural Systems: Biological Resources of Russia: Estimation of the Present State and Fundamental Bases of Monitoring” and the Program of the Presidium of the Russian Academy of Science “Evolution of the Organic World: Role and Effect of Planetary Processes.”


  1. 1.
    Doronina, L., Churakov, G., Shi, J., Brosius, J., Baertsch, R., Clawson, H., and Schmitz, J., Exploring massive incomplete lineage sorting in Arctoids (Laurasiatheria, Carnivora), Mol. Biol. Evol., 2010, vol. 32, no. 12, pp. 3194–3204.Google Scholar
  2. 2.
    Eizirik, E., Murphy, W.J., Keopfly, K.P., Johnson, W.E., Dragoo, J.W., Wayne, R.K., and O’Brien, S.J., Pattern and timing of diversification of the order Carnivora inferred from multiple nuclear gene sequences, Mol. Gen. Evol., 2010, vol. 56, pp. 49–63.CrossRefGoogle Scholar
  3. 3.
    Howell, A.B., Contribution on the comparative anatomy of the eared and earless seals (genera Zalophus and Phoca), Proc. US Nat. Mus., 1929, vol. 73, no. 2736, art. 15, pp. 1–142.Google Scholar
  4. 4.
    de Muizon, C., Les relations phylogenetiques des Lutrinae (Mustelidae, Mammalia), Geobios, 1982, vol. 15, suppl. no. 1, pp. 259–277.CrossRefGoogle Scholar
  5. 5.
    Orlov, Yu.A., A Find of a fossil pinniped in Siberia, Priroda, 1931a, no. 1, pp. 91–94.Google Scholar
  6. 6.
    Orlov, Yu.A., Ober die Reste eines primitiven Pinnipediens aus den neogenen Ablagerungen Westsibiriens (On a record of a primitive pinniped from the Neogene deposits of Western Siberia), Dokl. Akad. Nauk SSSR Ser. A, 1931b, no. 3, pp. 86–94.Google Scholar
  7. 7.
    Orlov, J.A., Semantor macrurus (Ordo Pinnipedia, Fam. Semantoridae fam. nov.) aus den Neogen-ablagerungen Westsibiriens, Tr. Paleozool. Inst., 1933, vol. 2, pp. 165–268.Google Scholar
  8. 8.
    Rogovsky, P.Ya., Morphofunctional types of the pelvic girdle of mammals, in Sbornik “Voprosy bioniki” (Collected Works: Questions of Bionics), Moscow, 1967, pp. 39–46.Google Scholar
  9. 9.
    Rogovsky, P.Ya., The pelvis of mammals in comparative anatomical and functional light, Doctoral Dissertation in Veterinary Sciences, Kiev, 1973.Google Scholar
  10. 10.
    Tedford, R.H., Relationship of pinnipeds to other carnivores (Mammalia), Syst. Zool., 1976, vol. 25, no. 4, pp. 363–374.CrossRefGoogle Scholar
  11. 11.
    Thenius, E., Uber die systematische und phylogenetisclic Stellungder Genera Promeles und Semantor, Sitzb. Osterr. Akad. Wissensch., Matb.-Natur. K. 1, 1949, part 1, vol. 158, no. 4, pp. 322–336.Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • A. V. Lavrov
    • 1
    Email author
  • K. K. Tarasenko
    • 1
  • A. N. Vlasenko
    • 2
  1. 1.Borissiak Paleontological Institute, Russian Academy of SciencesMoscowRussia
  2. 2.Skryabin Moscow State Academy of Veterinary Medicine and BiotechnologyMoscowRussia

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