Periacineta buckei (Kent, 1881)

Dovgal, Igor & Pešić, Vladimir, 2012, Suctorian ciliates (Ciliophora, Suctorea) as epibionts of stream-dwelling aquatic beetles (Coleoptera) and water mites (Acari: Hydrachnidia) in the southwestern Palaearctic region, Zootaxa 3166, pp. 34-40 : 37

Periacineta buckei (Kent, 1881)

( Fig. 4 )

New records. MONTENEGRO: Kolašin town, stream Bistrica, 1122 m. a.s.l., 42°48'N; 19°27'E, 30.7.2006, on Hydraena morio ; Berane town, spring near Monastir Djurdjevi Stupovi, 42°51'N; 19°51'E, 29.9.2006, on Dryops sp. ( Coleoptera , Dryopidae ); Mojkovac town, Lepenac stream, 30.ix.2006, on Hydraena sp.; GREECE: Evia Island, the region of Ochi, stream Gefira Dimosaris, downstream between Kalergo and Kallianos vill., 30.6.2007, on Hydraena sp.

Diagnosis. Suctorian with trapeziform, flattened, loricate cell. Lorica smooth, and there is a short stalk. Macronucleus spheroidal or elongate. Clavate tentacles arranged in two apical fascicles. There are from two to four contractile vacuoles.

Measurements: Cell length 16–120 μm, width 19–59 μm.

Remarks. New for Montenegro and Greece.

Distribution. Widespread species; North America ( Nutting 1888 as Acineta compressa, Mariño-Pérez et al. 2011 ); Japan ( Nozawa 1938 as Periacineta tenuis ); Europe: Germany ( Matthes 1954d), Ukraine ( Dovgal 1996), Balkan (present paper); observed on different hosts ( Belostoma sp., Lethocerus sp, Ranatra sp., R. linearis, Nepa cinerea, N. rubra, Naucoris cimicoides, Hydraena sp., Argyroneta aquatica, Anacharis sp, Planorbis sp., Planorbarius corneus, Lymnaea stagnalis, Hydrous sp., H. aterrimus , Helophorus sp., Helophorus flavipes , H. fallax , H. asperatus , Hydraena sp., H. morio and Dryops sp.) and inanimate substrates.

Figures

FIGURES 1 – 7. 1 = Setodiscophrya deplanata (Matthes, 1954), from Hydraena sp. (× 640); 2 = Discophrya helmidis Matthes, 1954, from Hydraena sp. (× 640); 3 = Elatodiscophrya hochi (Matthes, 1954), from Hydraena sp. (× 640); 4 = Periacineta buckei (Kent, 1881), from Hydraena sp. (× 640); 5 = Discophrya lichtensteinii (Claparede & Lachmann, 1859), from Torrenticola barsica (× 640); 6 = Acineta sp. from Torrenticola barsica (× 640); 7 = Acineta persiensis Dovgal & Pešić, 2007, from Protzia sp. (× 640).