Cite this article as:
Surkov M. V. The First Evidence of Tactile Sensor Zones among Dicynodonts (Therapsida). Izvestiya of Saratov University. Earth Sciences, 2006, vol. 6, iss. 1, pp. 91-95. DOI: https://doi.org/10.18500/1819-7663-2006-6-1-91-95
The First Evidence of Tactile Sensor Zones among Dicynodonts (Therapsida)
For the first time evedences of possible tactile sensor zones has been described in representative of non-theriodont clade of therapsids – Myosaurus gracilis (Dicynodontia). The system of foramina and grooves reflecting well developed blood network on the snout of Myosaurus is generally similar to the same descried for theriodonts and possibly represents development of sensor zones. Very large orbits and developed sensor fields on the snout of Myosaurus the most probably indicates the nocturnal mode of life and support previous ideas on omnivorous feeding.
1. Broili F. Haare bei Reptilien // Anat. Anz. 1941. Bd.92. P.62–68.
2. Brink A.S. Speculation on some advanced mammalian characteristics in the higher mammal-like reptiles // Paleontologia Africana. 1957. №4. P.77–96.
3. Watson D.M.S. On the skeleton of a bauriamorph reptile // Proc. of the Zoology Society of London. 1931. P.35–98.
4. Valen L. van. Therapsids as mammals // Evolution. 1960. №14. P.304–313.
5. Татаринов Л.П. Развитие системы губных (вибриссовых) сосудов и нервов у териодонтов // Палеонтологический журнал. 1967. №1. С.3–17.
6. Cluver M.A. The cranial morphology of the Lower Triassic dicynodont Myosaurus gracilis // Annals of the South African Museum. 1974. №66. P.35–54.
7. Cosgriff J.W., Hammer R.H. New species of Dicynodontia from the Fremow Formation // Antarctic Journal of the United States. 1979. V.14, №5. P.30–32.
8. Haughton S.H. Investigations in South African fossil reptiles and Ampibia Pat 10 Descriptive catalogue of the Anomodontia, with especial reference to the examples in the South African Museum // Annals of the South African Museum. 1917. №12. P.127–174.
9. Angielczyk K.D. Preliminary phylogenetic analysis and stratigraphic congruence of the dicynodont anomodonts (Synapsida: Therapsida) // Palaeontologia Africana. 2001. №37. P.53–79.
10. King G.M. Anomodontia // Handbuch der Paläoherpetologie. Stuttgart, 1988. V.17. 175 р.
11. Surkov M.V., Benton M.J. The basicranium of dicynodonts (Synapsida) and its use in phylogenetic analysis // Palaeontology. 2004. V.47, №3. P.619–638.
12. Татаринов Л.П. О формировании признаков млекопитающих у териодонтов // Палеонтологический журнал. 1965. №1. С.3–12.
13. Татаринов Л.П. К анатомии головы тероцефалов (сосуды, нервы и железы Moshowaitsia) // Там же. 1964. №2. С.72–84.
14. Smith R.M.H. Changing fluvial environments across the Permian Triassic boundary in the Karroo basin, South Africa and possible causes of tetrapod extinction // Paleogeography, Palaeoclimatology, Palaeoecology. 1995. №117. P.81–104.
15. Hillenius W.J. Turbinates in therapsids – evidence for the Late Permian origin of mammalian endothermy // Evolution. 1994. №48. Р.207–229.
