Trechus cardioderus subsp. athonis Schatzmayr 1909

2. Trechus cardioderus athonis Schatzmayr, 1909

Type material: syntypes: 4♂♂, 1♀, Macedonie (Greece), Athos, A. Schatzmayr, coll. O. Leonard (SDEI)

Other material examined: Bulgaria: Belasitsa Mts: 1♂, Klyuch Vill., along Klyuchka river, N41.359083 E23.016500, 20.5.2008, B. Guéorguiev leg. (NMNHS); 1♂, same data as above but Klyuchka river valley, N41.358084 E23.015716, 14.09.2009 (NMNHS); 2♂♂, “Kongura” Nature Reserve, N41.3400833, E23.1799167, 04.09.2008, B. Guéorguiev leg. (NMNHS); 1♂, “Varshiloto” Place, N41.323117 E23.188700, 09.07.2008, R. Bekchiev leg. (NMNHS); 1♂, Samuilovo Vill., N41.366897 E23.092969, 05.07.2008, B. Guéorguiev leg. (NMNHS); 1♂, same data as above but 07.04.2019, R. Kostova leg. (BFUS); 1♂, same data as above but 07.04.2021 (BFUS); 1♂, Samuilovo Vill. Kamenishki waterfall, N41.352525 E23.073882, 10.09.2010, R. Kostova leg. (BFUS); 1♂, Demir-Kapiya Pass, N41.330829 E23.085775, 07.08.2008, B. Guéorguiev leg. (NMNHS); 4♂♂, “Vodopada” Place, near Belasitsa hut, N41.360361 E23.180833, 02.09.2008, B. Guéorguiev leg. (NMNHS); 1♂, same data as above but 13.9.2009 (NMNHS); 2♂♂, same data as above but 08.10.2008, R. Bekchiev leg. (BFUS); Ograzhden Mts: 1♂, Gyurgevo Vill., N41.48040 E23.15527, 06.04.2010, R. Bekchiev leg. (BFUS); Maleshevska Mts: 1♂, West of Gorna Breznitsa Vill., N41.743712 E23.093544, 16.07– 14.08.2003, B. Guéorguiev leg. (NMNHS); Pirin Mts: 1♂, Kalimantsi Vill., near Kalimanska River, N41.4602, E23.4908, 11.01.2004, M. Langurov, N. Simov, S. Lazarov leg. (IBER-TT); Rila Mts: 1♂, Pastra Vill., along the river, N42.12234 E23.23835, 16.07.2018, R. Kostova leg. (BFUS); Rhodope Mts: 1♂, “Dyavolsko garlo” Cave, N41.615288 E24.379501, 16.06.2005, P. Stoev leg. (NMNHS); 1♂, “Kupena” Nature Reserve, Novomahlenska River, N42.008347 E24.280907, 25.05.2008, R. Kostova leg. (BFUS); 1♂, same data as above but “Mezar dere” Place, N41.986400 E24.288150, 04.07.2008 (BFSU); 4♂♂, Smolyan Distr., “The canyon of waterfalls” Place, N41.58249 E24.65640, 07.07.2019, R. Kostova leg. (BFUS); Strazhets Vill., 15.05.2018, R. Bekchiev (BFUS); Konyavska Mts: 6♂♂, Tsarvendol Vill. N42.36499 E22.82754, 26.07.2019, R. Bekchiev leg. (BFUS); 1♂, Potsarnentsi Vill., N42.496591 E22.894066, 24.05.2018, R. Bekchiev leg. (BFUS); 1♂, same data as above but “Chiflika” Place, N42.50443 E22.86463, 30.06.2020 (BFUS); Greben Mt: 1♂, Tran Distr., Vrabcha Vill., 12.8.2020, R. Bekchiev leg. (BFUS); Stara planina Mts.: 1♂, Kalofer, ecopath “Byala reka”, N42.65990 E24.95974, 06.08.2019, R. Bekchiev leg. (BFUS)

Additional comparative material examined: dissected median lobe of aedeagi (on microscope slides): T. subnotatus — Montenegro: 1♂, Dalmatia Zelenika (coll. R.Jeannel, MNHN); Greece:1♂, Iles Ioniennes, Céphalonia (coll. R. Jeannel, MNHN); T. pallidipennis Schaum, 1857 — Greece: 1♂, mont Pentelicon, Athènes (coll. R. Jeannel, MNHN); pinned specimens: determined as T. subnotatus by R. Jeannel — Bulgaria: 1♂, 1♀, Trjevna, Netolitzky (coll. R. Jeannel, MNHN); Montenegro: 1♀, Dalmatia, Castelnuovo (coll. R. Jeannel, MNHN); 1♂, Iles Ioniennes, Céphalonia; 1 ♂, Charakti (coll. R. Jeannel, MNHN); 1♂, Grotta du Dragon, près du lac Avythos, 1908, M. Hilf (coll. R. Jeannel, MNHN); T. pallidipennis — Albania: 1♂, Kruja Mader (coll. R. Jeannel, MNHN); determined as T. cardioderus golesnicensis Apfelbeck, 1918 by R. Jeannel — Montenegro: 1♂, Zljeb planina, Bielasica (coll. R. Jeannel, MNHN); 1♂, Besina gora (coll. R. Jeannel, MNHN); T. byzantinus Apfelbeck, 1901 — Syntypes: Turkey, 2♂♂, Constantinopol, Belgrader Wald, v. Bodemeyer (coll. O. Leonard, SDEI)

Notes: Relatively large: the body length of males is 4.2–4.8 mm. The body’s dorsal surface is brown or dark brown. The colouration of the elytra varies even among the specimens from the same locality: there are specimens with one elongated subhumeral spot and one round spot before the apex of each elytron; specimens with a small, elongated spot in the humeral area of each elytron; specimens with a prolonged spot in the middle of each elytron; or have iridescent, dark, unicoloured elytra. The elytra are long and oval. Reduced wings. Median lobe of the aedeagus (Fig. 2): the apex is prolonged and pointed downward in the lateral view, while the apical lamella is wide and straight (not narrowing) in the dorsal view; the copulatory piece is strongly curved upward in the distal part, a characteristic typical of the species T. cardioderus. The habitus and male genitalia of the studied Bulgarian specimens are identical to those of the type series of T. cardioderus athonis. They clearly differ from those of T. subnotatus subnotatus in the shape of the copulatory piece, which is almost straight in the lateral view in T. subnotatus subnotatus (Jeannel 1927: 443) and strongly curved upward in the distal part in T. cardioderus athonis (Fig. 2; Jeannel 1927: 455 —Fig. 1079).