Backeljau bruyn (4 risultati)

This paper deals with the infrageneric systematics of the genus Arion. It presents a historical account, after which the infrageneric position of A. intermedius is discussed. This species is included in the subgenus Kobeltia of which the type species is reconsidered. Next, a discussion on the infrageneric allocation of A. lusitanicus and A. flagellus is provided. Both species are provisionaolly placed in the subgenus Mersarion, which in turn may be grouped with Arion s.s. in the chromosomal group Lochea (n=27). This classification relies on chromosomal, electrophoretic, genital and morphological characters. Yet, the currently available data do not allow a reliable phylogenetic analysis, so that no taxonomic ranks are attributed to the retained groupings. Nevertheless, some tentative phylogenetic and evolutive hypotheses are presented. Thereby special attention is paid to 1) chromosome numbers, 2) electrophoretic data, 3) breeding systems, 4) spermatophores and 5) the complexity of genitalia and mating behavior. 34 pp., 19 figs, 5 plates, 4.…

8 pp., 3 figs, 4.

20 pp., 5 figs, 4.