A review of the subgenus Cladoconnus Reitter of the genus Euconnus Thomson (Coleoptera: Staphylinidae: Scydmaeninae) from the Balkan Peninsula, Turkey and Caucasus Hlaváč, Peter Stevanović, Miroslav Zootaxa 2013 3646 4 401 425 Muller & Kunze Muller & Kunze [151,817,1410,1436] Insecta Scydmaenidae Euconnus Animalia Coleoptera 15 416 Arthropoda species denticornis Cladoconnus    Euconnus(s.str.)  denticornisMüller & Kunze: Ganglbauer, 1899: 49; Reitter, 1882: 574   Euconnus( Cladoconnus) denticornisMüller & Kunze: Franz, 1971b: 301, Fig. 23; Karaman, 1974: 140, Figs. 25, 26, 26a;   Euconnus denticornisMüller & Kunze: Castellini, 2006: 89.   Scydmaenus denniiStephens, 1832: 83. Typelocality: in the vicinity of London, synonymized by Reitter, 1909: 227.   Scydmaenus ruficornisDenny, 1825: 59. Typelocality: near London, in Norfolk, Barham and Epping Forest, synonymized by Croissandeau, 1898: 121.   Euconnus solariiReitter, 1904: 152. Typelocality: Italien: Vallo Lucano (S. Biase), synonymized by Karaman, 1974: 127.   Euconnus(s. str.) suramensisReitter, 1882: 574. Typelocality: Kaukas [Caucasus], synonymized by Croissandeau, 1898: 121; synonymy confirmed by Karaman, 1974: 127 and by Davies, 2004: 26.   Euconnus denticornisa. uredineusTrella, 1924: 22. Typelocality: Przemyśl, Poland[aberration, not available name]   Material examined(10 3, 2 Ƥ):  CZECH REPUBLIC:1 Ƥ: Moravia bor., Suchdol nad Odroum M. Mantič leg. (PHKS). 1 Ƥ: Moravia, Brno – Sobĕšice, 3.vi.1988, P. Průdek. (PHKS). 13: Mor. Mer. Pavlovské kopce, Klausem (53), 23.v.1962, lgt. Lauterer. (PHKS).  SLOVAKIA:1 3: Muránska Planina, v. Strelnica, 14.vi.2009, fagetum. (SBPC). 1 3: Nesvády, 2 kmJV, 8074, Líščie diery, písčiny, 24–25.v.1995, M. Mantič leg. (PHKS).  SLOVENIA:2 3: Sloveniabor., Peċovnik, 5.v.2001, J. Vávra leg. (JVOC). 1 3: Sajevce, Krakovski Gozd forest, Kostanjevica na Krki env, 24.iv.2004, Tomáš Sitek lgt. (PHKS). 1 3: Poljane env, Polina pečina, 27.vi.2002, V. Zieris lgt. (VZPC).  BOSNIA AND HERZEGOVINA:1 3: Bosnia, Mojmilo, 1929. vi.10, leg. Dr. J. Fodor. (HNHM).  TURKEY:1 3: Sinop, 20 kmSW Ayancuk, 895 m, 41°49'34''N, 34°24'14''E, fir and beech forest, 2.iv.2009, V. Assing. (HMGG). 1 3: Sinop, 25 kmS Sinip, W Lala, 41°53'15''N, 35°01'46''E, 240m, oak forest, 31.iii.2009, V. Assing. (HMGG).   Description:Body shiny, pitchy brownish-black, body length 1.75–1.80 mm, body width 0.75–0.80 mm; with long, golden pubescence, sparse on elytra, erect on sides of pronotum and posterior part of head. Head about 1.25 times as wide as long, tempora evenly convergent posteriorly; eyes protuberant; supra-antennal tubercles strongly protuberant. Antennae ( Fig. 29) 0.95–1.05 mmlong; antennomeres III–V subquadrate and subequal; VI subtapezoidal; 1.15 as wide as long; VII subtrapezoidal, 1.50 as wide as long; antennomere VIII about 1.30 times as long as wide, about 2.70 times as long as VII and 1.30 times as long as IX; antennomere X 1.15 times as wide as long; terminal antennomere 1.90 times as long as wide and 1.80 times as long as X. Pronotum about as long as wide. Elytra about 1.40 times as long as wide, sutural striae reaching basal fourth of elytral length. Aedeagus 0.38 mmin length, as in Fig. 30.   Distribution: Austria, Belgium, Bosnia and Herzegovina, Croatia, Czech Republic, Denmark, Estonia, France, Great Britain, Germany, Georgia, Hungary, Italy, Latvia, Lithuania, Macedonia, Netherlands, Poland, Romania, Slovakia, Slovenia, Russia(South European Territory), Sweden, Switzerland, Ukraine, Serbia, Montenegroand Turkey.  Differential diagnosis:  Euconnus denticornisdiffers from other species of  denticornisgroup by small body, 1.75–1.85 mmlong, antennomeres III–V subquadrate and subequal, VII subtrapezoidal 1.50 times as wide as long, antennomere VIII about 1.30 times as long as wide, IX 1.20 times as wide as long, X 1.15 as wide as long and by terminal antennomere 1.90 times as long as wide.  E. denticornisis similar to  E. puniceusbut it differs from late in darker colour, smaller size and longer terminal antennomere which is 1.90 times as long as wide, only 1.80 times as long as wide in  E. puniceus.   Note I:Castellini (2006) discussed a possible synonymy of  E. robustus, E. dodecanicus, E. pararobustusand  E. pseudorobustuswith  E. denticornisbased on the similar structure of aedeagi. Illustrations of Herbert Franz, in general, are of very poor quality and we are of the opinion that it is not possible to synonymyze any of his species without studying the material and just on the basis of his illustrations.  Euconnus robustus, E. dodecanicusand  E. pararobustusbelong to a different group of species than  E. denticornisand all three seem to be distinct species although no material of  E. pararobustuswas available for our study. These species are clearly different from  E. denticornisin external characters and in the structure of the aedeagus. The aedeagus of  E. pseudorobustusis very similar to that of  E. denticornis,but we decided to maintain it as a separate species (see discussion in remarks for  C. pseudorobustus).  Note II:The aberration uredineusof  Euconnus denticorniswas described by Trella (1924), this name is infrasubspecific and it is not available (ICZN, 45.5.). This name was incorrectly used as a synonym of  E. denticornisby Davies (2004: 207).