Allotrichoma bifidum Papp 1974

Allotrichoma bifidum Papp, 1974 Fig. 1 MATERIAL. Russia: Volgograd Oblast, Serafimovich env., 49.57ºN, 42.60ºE, 28–29.IV 2013, 1 ♂, coll. N.Vikhrev. DIAGNOSIS. The species can be differentiated from the other species of the genus Allotrichoma by the structure of male genitalia only. The most important character is the shape of cerci, which are pincer-like and apically narrow from dorsal (posterior) view. The shape from the dorsal view is similar to that of several species, among them A. filiforme Becker, 1896, A. strandi Duda, 1942, A. trispinum Becker, 1896 (Stuke, 2022, Fig. 3 p. 300, Figs 10, 11 p. 303) but in lateral view cerci of A.bifidum distinctly broaded dorsally and ventrally and are triangular (Fig. 1). DISTRIBUTION. Allotrichoma bifidum was described from Hungary and Romania (Papp, 1974), found in Serbia (Cansoneri & Rampini, 1990), Slovakia (Zatwarnicki, 1996) and Bulgaria (Beschovski & Zatwarnicki, 2002). Stuke (2022) reported about the distribution of this species in Croatia and Russia (South Siberia: Buryatia). Here A. bifidum is recorded from European Russia for the first time.