Ptiliolum Flach, 1888

komosiński, Karol & Marczak, Dawid, 1872, Ptiliolum caledonicum (Sharp, 1872) andBaeocrara japonica (Matthews, 1885) (Coleoptera: Staphylinoidea: Ptiliidae) New to Poland, with Additional Polish Records ofAcrotrichis nanaStrand, 1946, The Coleopterists Bulletin 70 (1), pp. 87-90 : 87-90

Ptiliolum Flach, 1888

Five species in the genus Ptiliolum are currently reported from Poland: P. fuscum (Erichson, 1845) , P. sahlbergi (Flach, 1888) , P. schwarzi (Flach, 1887) , P. spencei (Allibert, 1844) , and P. wuesthoffi Rosskothen, 1934 ( Burakowski et al. 1978, 2000; Majewski 1996). An additional species, new to Poland, can now be added. Ptiliolum caledonicum (Sharp, 1872) is easily distinguished from other European congeners by its lighter, yellow-brown body color and more pronounced punctation on the elytra in comparison to the prothorax. Other Ptiliolum species possess a dark, black or brown body with comparatively weakly punctured elytra, being either of identical coarseness ( P. sahlbergi ) or much weaker than the prothorax ( P. fuscum ,

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P. schwarzi , P. spencei , and P. wuesthoffi ). The female spermatheca of P. caledonicum is characteristic ( Besuchet 1971).

Ptiliolum caledonicum is widely distributed in Europe, being known from the southern, western, and northern parts of the continent, including countries neighboring Poland, such as Germany, the Czech Republic, and Slovakia (Löbl and Smetana 2004). It is generally considered a rare species and frequently noted in local Red Data Books ( Ehnström et al. 1993; Binot et al. 1998; Bussler and Hofmann 2003). It inhabits old, rotting logs and stumps. In Scandinavia, it is most frequently collected from under bark and decaying wood infected by fungi on aspen ( Populus tremula Linnaeus, 1753 ; Salicaceae ) (Sörensson and Kvamme 1995). It has also been found under the bark of dead pine trees ( Pinus sp. ; Pinaceae ) and standing, dead alders ( Alnus sp. ; Betulaceae ) ( Alexander 2002).

Material Examined. Mazurian Lake District (northeastern Poland): Borecka Forest ( Fig. 1 ), forest spatial unit 90b (EE79), 16 VI 2011 – 1 female, leg et coll. K. Komosiński, trap type: Netocia on a broken birch tree ( Betula sp. ).

Figures

Fig. 1. Distribution of Ptiliolum caledonicum, Baeocrara japonica, and Acrotrichis nana in Poland.