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Skull variability of Mustela nivalis Linnaeus, 1766 in Poland

100%

Schmidt K.

Acta Theriologica

1992

tom 37

nr 1-2

The skull variability of Mustela nivalis Linnaeus, 1766 was studied with regard to age, sexual dimorphism and geographical distribution. The material consisted of 271 skulls from Poland. Linear dimensions of weasel skulls slightly increased with age. The changes in skull proportions were related to braincase diminution and increase in viscerocranium. In females, there was an obvious age variation in correlation structures which indicated synchronic growth and periods of stabilization. Sexual dimorphism was expressed by larger dimensions and different proportions in male skulls. The values of coefficients of variation were higher in males than females. Adult skull size was reached earlier by females than by male weasels. The correlation structures of male and female skulls were different. The skull dimensions increase from north-east to south-west Poland. It was revealed, that weasels from Poland but Silesia belong to the subspecies Mustela nivalis vulgaris Erxleben, 1777. Weasels from Silesia may probably form a separate subspecies Mustela nivalis trettaui Kleinschmidt, 1937.

Morphology and systematic position of the larvae of Cryptocephalus actacosmus and C.semiargenteus with special reference to the age variation of Cryptocephalus larvae [Coleoptera: Chrysomelidae: Cryptocephalinae]

100%

Bienkowski A. O.

Genus. International Journal of Invertebrate Taxonomy

1999

tom 10

nr 3

Ograniczanie wyników

1 Acta Theriologica

1 Genus. International Journal of Invertebrate Taxonomy

1 Bienkowski A. O.

1 Schmidt K.

1 1999

1 1992

Wyniki wyszukiwania

Skull variability of Mustela nivalis Linnaeus, 1766 in Poland

Morphology and systematic position of the larvae of Cryptocephalus actacosmus and C.semiargenteus with special reference to the age variation of Cryptocephalus larvae [Coleoptera: Chrysomelidae: Cryptocephalinae]