Euproctus platycephalus, E. asper and E. montanus (Urodela, Salamandridae), the only three species of the genus Euproctus, show a peculiar geographic distribution: their presence is restricted to Sardinia, to the Pyrenees and to Corsica respectively. The chromosome number of montanus is n = 12, 2n = 24, equal to that previously reported for platycephalus and asper. Mean chiasma frequency is higher in oocytes than in spermatocytes, in which chiasmata are generally restricted to the end regions of chromosomes. Sex chromosome dimorphism has not been detected either in male or in female germ cells.
Referenze Bibliografiche
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Con il contributo del Ministero per i Beni e le Attività Culturali