Stenus (Nestus) Pluvius Sp. N., With Notes On Some Related Species (Coleoptera: Staphylinidae: Steninae) Author Ryvkin, Alexandr B. text Acta Biologica Universitatis Daugavpiliensis 2014 14 2 187 205 journal article 10.5281/zenodo.12646394 1407-8953 12646394 Stenus ( Nestus ) immodicus Ryvkin, 2000 (Fig. 6) immodicus Ryvkin, 2000: 348 ryvkini Puthz, 2001: 58 , syn. nov. Material examined . RUSSIA : KHABAROVSK TERRITORY: 1 male-HT ( ZMMU ): USSR, Khabarovsk Province , Bolshe-Khekhtsyrskiy Reserve . 6–10.VI.1990 . 400-450 m , Abies / Pinus / Betula forest. S.Golovatch & W.Schawaller leg.— 4 males , 6 females ( AR ), 1 male , 1 female ( MHNG ): Bol’shekhekhtsyrskiy Nature Reserve , Sosninskiy cordon. 25.05.2004 . A.V.Tanasevitch leg.— 1 female ( AR ): same locality & collector, Abies forest. 27.05.2004 .— 1 female ( AR ): Slavyanka , 20 km N Troitskoye , right Amur bank, Quercus / Betula forest. 14- 19.06.1990 . S.I.Golovatch & W.Schawaller leg. — MARITIME PROVINCE : 1 female ( AR ): Kavalerovskiy District , Priiskovaya Pad’ . 31.07.1977 . L.D.Filatova leg.— 1 female [ HT of S . ryvkini Puthz ] ( SDEI ): Primorskiy Kray [= Maritime Province ]: 5 km SE Samarka , 70 km N Chuguyevka. Gordeyevskaya Mtn. 44º46’N , 134º13’E , 300 m , 29.V.1993 , L.Zerche . Remarks. The original description of S . immodicus is based on the only male holotype which has been collected SW of Khabarovsk . The species is closely related to the cautus group members which have subcylindrical abdomen and fairly narrow paratergites 4 to 7 ( S . lohsei Puthz, 1965 , S . incautus Ryvkin, 2000 , S . semiputatus Ryvkin, 1995 ). Puthz (2001) , when describing S . ryvkini from the only female, placed it in the crassus group and ignored presense of small but developed paratergites in this species. A comparison of both holotypes shows that those are conspecific in the external characters; the female characters of topotypical specimens of S . immodicus are quite identical to those of the holotype of S . ryvkini ; therefore S . ryvkini is to be placed in the synonymy of S . immodicus . Basing on the cited material, we can suppose that S . immodicus is widely distributed in both the Khabarovsk Territory and the Maritime Province . Since the holotype of S . immodicus had the aedeagus with evaginated endophallus, the new topotypical material enables me to provide a new illustration for this structure (Fig. 6).