SPECIES-RELATED FEATURES OF PROCESSUS NASALIS IN SOME WILD AND DOMESTIC SMALL RUMINANTS
Radoslav Michailov
Резюме: The nasal processes of adult representatives of 7 small ruminants species - domestic sheep, mouflon, domestic goat, roe deer, fallow deer, springbok and chamois - have been investigated. The species with one nasal process were the mouflon, the domestic sheep and the chamois. Domestic goats, springboks, roe deers and fallow deers were with two nasal processes. The various location, length and shape of nasal bone processes in the domestic goat, the springbok, the roe deer and fallow deer allowed us to classify them as proc. nasalis medialis (medially situated) and proc. nasalis lateralis (laterally situated).
The comparative analysis of data showed definitely that nasal bones of fallow deers and roe deers were with longer lateral nasal processes as compared to springboks and domestic goats. Although the shape of nasal processes was similar, nasal bones of fallow deers and roe deers could be distinguished by their higher length and width in fallow deer as compared to roe deer and also, by the sharply narrowing nasal bone of fallow deers from the middle in cranial direction. Nasal bones of the springbok and the domestic goat has similar needle-shaped lateral nasal processes but they could be differentiated by the shape of the medial nasal process that was unilaterally pointed in the springbok and bilaterally pointed in domestic goats. Furthermore, in domestic goats there was a longitudinal cleft in the middle of nasal bones. The difference among studied animal species with one nasal process was that it was unilaterally laterally pointed in mouflons and domestic sheep (more pronounced in mouflons) whereas the nasal process was bilaterally pointed in the chamois.
The comparative analysis of data showed definitely that nasal bones of fallow deers and roe deers were with longer lateral nasal processes as compared to springboks and domestic goats. Although the shape of nasal processes was similar, nasal bones of fallow deers and roe deers could be distinguished by their higher length and width in fallow deer as compared to roe deer and also, by the sharply narrowing nasal bone of fallow deers from the middle in cranial direction. Nasal bones of the springbok and the domestic goat has similar needle-shaped lateral nasal processes but they could be differentiated by the shape of the medial nasal process that was unilaterally pointed in the springbok and bilaterally pointed in domestic goats. Furthermore, in domestic goats there was a longitudinal cleft in the middle of nasal bones. The difference among studied animal species with one nasal process was that it was unilaterally laterally pointed in mouflons and domestic sheep (more pronounced in mouflons) whereas the nasal process was bilaterally pointed in the chamois.
Ключови думи: craniometry; nasal bone; processus nasalis; wild and domestic small ruminants
Дата на публикуване: 2023-02-06
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