Lutrochus Erichson

Maier, Crystal A. & Short, Andrew E. Z., 2013, A revision of the Lutrochidae (Coleoptera) of Venezuela, with description of six new species, Zootaxa 3637 (3), pp. 285-307 : 306

publication ID	https://doi.org/ 10.11646/zootaxa.3637.3.3
publication LSID	lsid:zoobank.org:pub:C86DD907-723F-4EF1-87D7-2F511DCC1CBC
DOI	https://doi.org/10.5281/zenodo.6156887
persistent identifier	https://treatment.plazi.org/id/B43B879A-FFF4-FFF2-D794-FC44FA69F976
treatment provided by	Plazi
scientific name	Lutrochus Erichson
status

Treatment

Key to Lutrochus Erichson View in CoL View at ENA species of Venezuela

1. Mesotibia with apical excavation for reception of tarsus ( Figs. 25 View FIGURES 20 – 26 , 31 View FIGURES 27 – 33 )............................................ 2

- Mesotibia lacking apical excavation for reception of tarsus ( Fig. 44 View FIGURES 40 – 47 )............................................. 7

2. Elytra explanate, epipleuron appearing broad in ventral aspect ( Figs. 9, 10 View FIGURES 8 – 13 ); reddish-brown in color; prosternum strongly deflexed ventrally in anterior half ( Fig. 12 View FIGURES 8 – 13 ); apical maxillary palpomere strongly triangular ( Fig. 11 View FIGURES 8 – 13 )................................................................................................ Lutrochus acuminatus Grouvelle

- Elytra not explanate, epipleuron appearing narrow in ventral aspect ( Figs. 15, 16 View FIGURES 14 – 19 , 21, 22 View FIGURES 20 – 26 ); dark brown to black in color; prosternum very slightly or not deflexed ventrally in anterior half ( Fig. 15 View FIGURES 14 – 19 ); apical maxillary palpomere weakly triangular to discshaped ( Figs. 33 View FIGURES 27 – 33 , 37 View FIGURES 34 – 39 )................................................................................... 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 View FIGURES 34 – 39 ); apical metatarsomere setose ( Fig. 38 View FIGURES 34 – 39 ); length 2.5–3.2 mm ......................................................................................... L. maldonadoi n. sp.

- Apical maxillary palpomere triangular ( Fig. 30 View FIGURES 27 – 33 ); apical metatarsomere entirely glabrous ( Fig. 32 View FIGURES 27 – 33 ); length 3.0–4.0 mm............................................................................................... L.vestitus Sharp

5. Apical protarsomere entirely glabrous ( Fig. 23 View FIGURES 20 – 26 )............................................... L. gustafsoni n. sp.

- Apical protarsomere at least partially pubescent( Figs. 18 View FIGURES 14 – 19 , 58 View FIGURES 55 – 60 )................................................... 6

6. Apical protarsomere with discrete pubescent patch in basal third, apical two-thirds glabrous ( Fig. 18 View FIGURES 14 – 19 ); body without metallic sheen dorsally ( Fig. 14 View FIGURES 14 – 19 ).................................................................. L. cauraensis n. sp.

- Apical protarsomere pubescent, although more sparse in apical half ( Fig. 58 View FIGURES 55 – 60 ); body with bluish-violet metallic sheen dorsally ( Fig. 55 View FIGURES 55 – 60 )............................................................................... L. violaceus n. sp.

7. Metasternum with medial circular glabrous patch ( Fig. 45 View FIGURES 40 – 47 ); scutellum diamond-shaped ( Fig. 46 View FIGURES 40 – 47 ); elytron with seven rows of shallow punctures ( Fig. 40 View FIGURES 40 – 47 ); apical maxillary palpomere narrow ( Fig. 43 View FIGURES 40 – 47 )......................... L. meridaensis n. sp.

- Metasternum without medial circular glabrous patch ( Fig. 49 View FIGURES 48 – 52 ); scutellum triangular ( Fig. 52 View FIGURES 48 – 52 ); elytral punctation dense, confused ( Fig. 51 View FIGURES 48 – 52 ); apical maxillary palpomere wide (Fig. 53)........................................ L. minutus n. sp.