New insights into the taxonomy of Trechus Clairville, 1806 (Coleoptera: Carabidae) in the Balkans, with the first description of the male of Trechus bohemorum Pawlowski, 1973 Author Kostova, Rumyana Department of Zoology and Anthropology, Faculty of Biology, Sofia University, 8 Dragan Tsankov Bvld., 1000 Sofia, Bulgaria Author Bekchiev, Rostislav National Museum of Natural History, Bulgarian Academy of Sciences, 1 Tsar Osvoboditel Blvd., 1000 Sofia, Bulgaria text Zootaxa 2025 2025-07-17 5661 4 538 552 http://dx.doi.org/10.11646/zootaxa.5360.3.8 journal article 311417 10.11646/zootaxa.5661.4.4 cf2afffd-5fbf-4a2c-a29b-32dbe46c79d8 1175-5326 16605866 FFCA3425-871D-4C63-83F4-DE4A768F60B0

TABLE 1. Metric characters and indices of the four known Trechus bohemorum specimens.

	Holotype Female: (BG: Šarlir, Pirin, Mac.)	Female: (BG: Šarlir, Pirin, Mac.)	Paratype Female: (BG: Samokov)	Male: (BG: Zemen Gorge)
Metrics (mm):
L	3.40	3.70	3.48	3.60
HW	0.75	0.75	0.73	0.78
PL	0.64	0.68	0.60	0.66
PW	0.90	0.90	0.94	0.98
PBW	0.75	0.75	0.75	0.82
PAW	0.68	0.68	0.68	0.70
EL	2.11	2.18	2.26	2.30
EW	1.47	1.47	1.47	1.52
AHD	0.57	0.51	0.49	0.59
PHD	1.32	1.14	1.28	1.33
Indices:
L/HW	4.53	4.92	4.74	4.61
L/PW	3.77	4.10	3.70	3.69
L/PL	5.33	5.47	5.78	5.43
L/EL	1.62	1.70	1.54	1.56
L/EW	2.32	2.52	2.37	2.37
EL/EW	1.44	1.49	1.54	1.51
PW/PL	1.41	1.33	1.56	1.47
PW/HW	1.20	1.20	1.28	1.25
PW/PBW	1.20	1.20	1.25	1.19
PW/PAW	1.33	1.33	1.39	1.39
PAW/PBW	0.90	0.90	0.90	0.86
EW/PW	1.63	1.63	1.56	1.56
EL/AHD	4.00	4.30	4.62	3.93
EL/PHD	1.60	1.91	1.77	1.74