A revision of the Lutrochidae (Coleoptera) of Venezuela, with description of six new species Author Maier, Crystal A. Author Short, Andrew E. Z. text Zootaxa 2013 3637 3 285 307 journal article 10.11646/zootaxa.3637.3.3 04f506ff-e980-47b6-ac5c-33b5fdbea26b 1175-5326 216877 C86DD907-723F-4EF1-87D7-2F511DCC1CBC Key to Lutrochus Erichson species of Venezuela 1. Mesotibia with apical excavation for reception of tarsus ( Figs. 25 , 31 )............................................ 2 - Mesotibia lacking apical excavation for reception of tarsus ( Fig. 44 )............................................. 7 2. Elytra explanate, epipleuron appearing broad in ventral aspect ( Figs. 9, 10 ); reddish-brown in color; prosternum strongly deflexed ventrally in anterior half ( Fig. 12 ); apical maxillary palpomere strongly triangular ( Fig. 11 )................................................................................................ Lutrochus acuminatus Grouvelle - Elytra not explanate, epipleuron appearing narrow in ventral aspect ( Figs. 15, 16 , 21, 22 ); dark brown to black in color; prosternum very slightly or not deflexed ventrally in anterior half ( Fig. 15 ); apical maxillary palpomere weakly triangular to discshaped ( Figs. 33 , 37 )................................................................................... 3 3. Body size small, total length 2.5–4.5 mm ................................................................... 4 - Body size large, total length 4.6–5.5 mm ................................................................... 5 4. Apical maxillary palpomere rounded to disc-shaped ( Fig. 37 ); apical metatarsomere setose ( Fig. 38 ); length 2.5–3.2 mm ......................................................................................... L. maldonadoi n. sp. - Apical maxillary palpomere triangular ( Fig. 30 ); apical metatarsomere entirely glabrous ( Fig. 32 ); length 3.0–4.0 mm............................................................................................... L.vestitus Sharp 5. Apical protarsomere entirely glabrous ( Fig. 23 )............................................... L. gustafsoni n. sp. - Apical protarsomere at least partially pubescent( Figs. 18 , 58 )................................................... 6 6. Apical protarsomere with discrete pubescent patch in basal third, apical two-thirds glabrous ( Fig. 18 ); body without metallic sheen dorsally ( Fig. 14 ).................................................................. L. cauraensis n. sp. - Apical protarsomere pubescent, although more sparse in apical half ( Fig. 58 ); body with bluish-violet metallic sheen dorsally ( Fig. 55 )............................................................................... L. violaceus n. sp. 7. Metasternum with medial circular glabrous patch ( Fig. 45 ); scutellum diamond-shaped ( Fig. 46 ); elytron with seven rows of shallow punctures ( Fig. 40 ); apical maxillary palpomere narrow ( Fig. 43 )......................... L. meridaensis n. sp. - Metasternum without medial circular glabrous patch ( Fig. 49 ); scutellum triangular ( Fig. 52 ); elytral punctation dense, confused ( Fig. 51 ); apical maxillary palpomere wide (Fig. 53)........................................ L. minutus n. sp.