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Theriologia Ukrainica
(former Proceedings of the Theriological School)

ISSN 2616-7379 (print) • ISSN 2617-1120 (online)

2019 • Vol. 17 • Contents of volume >>>


download pdfRekovets, L., Kovalchuk, O., Demeshkant, V., Shevchenko, L. Enamel ultrastructure of lower molars of the red squirrel Sciurus vulgaris (Rodentia, Mammalia) from different populations in Ukraine. Theriologia Ukrainica. 2019. Vol. 17: 55-63.


 

title

Enamel ultrastructure of lower molars of the red squirrel Sciurus vulgaris (Rodentia, Mammalia) from different populations in Ukraine

author(s)

Rekovets, L., Kovalchuk, O., Demeshkant, V., Shevchenko, L.

affiliation

Wroclaw University of Environmental and Life Sciences (Wroclaw, Poland)
National Museum of Natural History, NAS of Ukraine (Kyiv, Ukraine)

bibliography

Theriologia Ukrainica. 2019. Vol. 17: 55-63.

DOI

http://doi.org/10.15407/pts2019.17.055

   

language

English, with Ukrainian summary, titles of tables, captures to figs, and references

abstract

The second lower molars of the red squirrel Sciurus vulgaris from different regions of Ukraine were examined in order to search for additional features to study the variability and clarify the subspecies status of its individual populations. Generally accepted methods were used to study the enamel ultrastructure. It is established that the tooth enamel of the red squirrel has a layered structure and is represented by different types (radial, HSB and PLEX), which are also characteristic for other rodent species. The arrangement of crystalline prisms of the radial layer in the IPM matrix is the main distinguishing feature of the morphological variability of enamel on main tooth conids. In various regional populations of the species, they act as an indicator of the adaptability of the teeth and their functionality as a single structure. This was reflected in differences in the thickness ratio of the radial layer and HSB, especially between the metaconid and the entoconid. The development of HSB is usually associated with greater functional load. Squirrel populations in the northern part of Ukraine have a relatively thick HSB layer, while those from central and southern parts of the country have a more strongly developed radial layer. According to these features, the Crimean populations are close to those from southern Ukraine and slightly differ from the Altai subspecies Sciurus vulgaris exalbidus, which was introduced into the Crimea in the first half of XX century. It is assumed that the enamel ultrastructure as a morphological character has changed in the process of adaptation of squirrels to a new environment. The distinguishing character of the enamel structure of Altai populations of the Teleut squirrel is that prisms do not fill cells of the radial layer on the hypoconid and protoconid. The tooth enamel ultrastructure of the Eurasian red squirrel cannot be an independent morphological character for their intraspecific differentiation. However, it can be successfully used in combination with other characters (e.g., fur coloration, craniometrical data), as well as the results of special molecular studies.

keywords

Sciurus vulgaris, taxonomy, teeth, enamel, prisms, Ukraine.

   

references

Amori, G., G. Aloise, L. Luiselli. 2014. Modern analyses on an historical data set: skull morphology of Italian red squirrel populations. Zookeys, 368: 79–89. https://doi.org/10.3897/zookeys.368.4691
Barkaszi, Z., I. Zagorodniuk. 2016. The taxonomy of rodents of the Eastern Carpathians. Proceedings of the State Natural History Museum, 32: 137–154.
Belokon, S., M. Belokon, Y. Belokon, I. Dykyi. 2014. Variability of the European red squirrel (Sciurus vulgaris l.) of western Ukraine by the microsatellite loci. Visnyk of the Lviv University. Series Biology, 65: 296–305. (Ukrainian)
Dulitskaya, E. A., V. N. Popov, A. I. Dulitsky. 1990. Phenetic-craniometrical evidence of the subspecies independence of squirrel of the Crimean population. In Phenetics of natural populations: materials of the 4th All-Union meeting. Borok, November 1990. AN USSR, Moscow, 78–79. (Russian)
Dulitsky, A., O. Dulitska. 2006. The squirrel (Sciurus vurgaris exalbidus Pallas) and its present status in the Crimea. Proceedings of Theriological School, 8: 71–74. (Ukrainian)
Koenigswald, W. v. 1980. Schmelzmuster und Morphologie in den Molaren der Arvicolidae (Rodentia). Abhandlungen der Senckenberigsch naturforschenden Gesellschaft, 539: 1–129.
Koenigswald, W. v. 1990. Ein ungewohnliches Schmelzmuster in den Schneidezahnen von Marmota (Rodentia, Mammalia). Neues Jahrbuch fur Geologie und Palaontologie Abhandlungen, 180, Is. 1: 53–73.
Koenigswald, W. v. 1997. Evolutionary trends in the differentiation of mammalian enamel ultrastructure. In: Koenigswald W. v. & Sander P. M. (eds). Tooth Enamel Microstructure. Balkema, Rotterdam, 203–233.
Koenigswald, W. v., P. M. Sander. 1997. Glossary of terms used for enamel microstructures. In: Koenigswald, W. v. & P. M. Sander (eds). Tooth Enamel Microstructure. Balkema, Rotterdam, 267–280.
Koenigswald, W. v. 2004. The three basic types of schmelz­muster in fossil and extant rodent molars and their distribution among rodent clades. Palaeontographica Abteilung A, 270: 95–132.
Lurtz, P. W. W., J. Gurnell, L. Magris. 2005. Sciurus vulgaris. Mammalian Species, 769: 1–10. https://doi.org/10.1644/1545-1410(2005)769[0001:SV]2.0.CO;2
Martin, T. 2004. Evolution of incisor enamel microstructure in Lagomorpha. Journal of Vertebrate Paleontology, 24 (2): 411–426. https://doi.org/10.1671/2513
Mygulin, O. O. 1938. Mammals of the URSR (materials to the fauna). Vydavnyctvo AN Ukr. RSR, Kyiv, 1–426. (Ukrainian)
Popova, L. V. 2016. Occlusal pattern of cheek teeth in extant Spermophilus: a new approach to the identification of species. Journal of Morphology, 277: 814–825. https://doi.org/10.1002/jmor.20537
Puzanov, I. I. 1959. On some changes of the Teleut squirrel acclimatized in the Crimea. Biulleten MOIP, otd. biol., 64 (1): 15–23. (Russian)
Rabiniak, E., L. Rekovets, D. Nowakowski. 2017. Dental ena­mel ultrastructure in Ochotona and Prolagus (Mammalia: Lagomorpha: Ochotonidae) from three late Miocene localities in Ukraine. Palaeontologia Electronica, 20.3.46A: 1–12. https://doi.org/10.26879/588
Rekovets, L., D. Nowakowski. 2013. Zahlschmelz-Ultrastruk­turen an Backenzahnen verschedener Vertreter der Familie Castoridae (Rodentia, Mammalia) aus der Ukraine. Sauge­tierkundliche Informationen, 9: 159–163. https://doi.org/10.1515/vzoo-2017-0015
Rekovets, L. I., O. M. Kovalchuk. 2017. Phenomenon in the evolution of voles (Mammalia, Rodentia, Arvicolidae). Vestnik zoologii, 51, Is. 2: 99–110.
Sidorowicz, J. 1971. Problems of subspecific taxonomy of squirrel (Sciurus vulgaris L.) in Palaearctic. Zoologischer Anzeiger, 187: 123–142.
Tsjupka, V. O. 2012. Squirrel, Sciurus vulgaris L. (Rodentia, Sciuridae) in Ukraine (Modern State of the Population, the Problems Intraspecific Structure). Message 1. Proceedings of the National Museum of Natural History, 10: 42–52. (Russian)
Zagorodniuk, I. V. 2006. Adventive mammal fauna of Ukraine and a significance of invasions in historical changes of fauna and communities. Proceedings of Theriological School, 8: 18–47. (Ukrainian)
Zagorodniuk, I. V. 2009. Taxonomy and nomenclature of the non-Muroidea rodents of Ukraine. Zbirnyk prats Zoologichnogo muzeyu, 40: 147–185. (Ukrainian)
Zizda, J. 2008. The variability of the color of the fur and the analysis of the distribution of various subspecies of the Sciurus vulgaris. Scientific Bulletin of Uzhhorod University, 22: 212–218.
Zizda, J. 2018. The colour phases of the European red squirrel in Ukraine: Similarities and differences by craniometric characters. Biosystems Diversity, 26, Is. 3: 183–187. https://doi.org/10.15421/011828


 


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