Tachinus (s.str.) rishirianus Watanabe et Shibata, 1965

Veselova, Elena, 2011, On the fauna of Tachyporinae (Coleoptera, Staphylinidae) of the Russian Far East. I. The genus Tachinus Gravenhorst, 1802, Baltic Journal of Coleopterology 11 (1), pp. 73-92 : 85-86

Tachinus (s.str.) rishirianus Watanabe et Shibata, 1965 , sp.propria

Tachinus (s.str.) rishirianus Watanabe et Shibata, 1965 , Kontyû, 33(3): 322

Tachinus (s.str.) rishirianus ; Tichomirova, 1973a: 150

Tachinus (s.str.) pallipes rishirianus ; Ullrich, 1975: 113

Tachinus (s.str.) pallipes rishirianus ; L.-Z.Li, 1995, The Japanese Journal of systematic entomology, 1(1): 56

Tachinus (s.str.) pallipes pallipes ; Ryabukhin, 1999: 90

Tachinus (s.str.) pallipes rishirianus ; Herman, 2001, Bulletin of the American Museum of Natural History, 265: 974

Tachinus (s.str.) pallipes rishirianus ; Smetana, 2004:347

Material. AMUR AREA : 1 female: Komusun River , 1000 m a.s.l. 30.08.1979, O.N.Kabakov leg. ( ZIN) .― SAKHALIN AREA: 1 female: Central Sakhalin Island, Stlanikovyi Mt. Ridge, source of Tym’ River near mouth of Troynoy Rill , 50º45’52"N 143º07’17"E, 13– 15.07.2003, I. V . Melnik leg. ( EV).― MAGADANAREA: 1 male: N Cisokhotia, 35 km N of Magadan, 19.08.1981, A.Lebedev leg. ( EV).― 1 male, 2 females: N Cisokhotia , 10 km N of Splavnaya, in soil and leaf litter near decaying body of Oncorhynchus keta , 25.08.1981, A.S.Ryabukhin leg. ( EV).― 12 males, 20 females: same locality, 25– 28.08.1981, A.S.Ryabukhin leg. ( EV) .

Remarks. T. rishirianus was originally described from Japan (the Rishiri Island near Hokkaido). Ullrich (1975) considered it to be similar to the continental T. pallipes in both general appearance and the shape of the aedeagus, and supposed the geographically defined island population to be a subspecies of the latter. T. rishirianus had been known from the terra typica only, but it was cited recently for the Daisetsuzan Mts. on the Hokkaido Island (L.-Z.Li 1995) also. I report it here from the Sakhalin Island and the Asian mainland (the N Amur basin and N Cisokhotia) for the first time. This species was recorded for the latter location ( Ryabukhin 1999) as T. pallipes pallipes basing on my old misidentification. My present study proves Ryabukhin’s series to be T. rishirianus . According to Ullrich’s redescriptions and figures, and also to my own data, both the species differ significantly in the coloration of elytra, the ground sculpture of pronotum, elytra and abdomen, the puncturation of abdominal tergites, the shape of aedeagus and terminalia. The distinctions are stable, intermediate forms are unknown, and there is a distinct hiatus between both taxa. The reasons provided make it possible to consider T. rishirianus as a good species. T. rishirianus may be regarded as an eastern vicariant of T. pallipes .