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  • Author: A. Petrenko x
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Rove Beetles of the Genus Gyrophaena (Coleoptera, Staphylinidae, Aleocharinae) of Ukraine

Twenty species of the genus Gyrophaena Mannerheim, 1830, from Ukraine are reviewed. Of these, five species: G. joyi Wendeler, 1924; G. joyioides Wüsthoff, 1937; G. orientalis A. Strand, 1938; G. pseudonana A. Strand, 1939 and G. williamsi A. Strand, 1935, are recorded from Ukraine for the first time. Detailed morphological descriptions, data on bionomics and distribution are given for each species. A key to all subgenera and species of the genus Gyrophaena occurring in Ukraine is provided.

Abstract

We study size-at-age and sexual variability of morphometric characteristics of the marsh frog. According to the size of the body, males were divided into three size-age groups (juvenis, subadultus, adultus), females — into four groups (juvenis, subadultus, adultus, adultus-I). We found that the chronological age of frogs (skeletochronology) does not always correspond to their biological age (size and proportions of the body). We noted that the semi-adult males are reliably larger than females by mean values of 26 studied morphometric characters. Males and females of “adultus” group do not differ by linear body size, significant differences were found in body proportions (7 characters). For the females of “adultus-I” group, the mean values of 26 characters are significantly larger than for “adultus” males. The results of our study showed that with the age of the marsh frog, the level of exhibition, directionality and structure of morphometric sex differences changes.