Lutrochus Erichson
Creators: name: Maier, Crystal A.
name: Short, Andrew Edward Z.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lutrochidae
Lutrochus

description: Key to Lutrochus Erichson species of northern South America (after Maier & Short 2013, new taxa listed in BOLD)
1 Mesotibia with apical excavation for reception of tarsus (Fig. 17)................................................ 2
- Mesotibia lacking apical excavation for reception of tarsus (cf. Maier & Short 2013 Fig. 44)......................... 11
2(1) Elytra explanate, epipleuron appearing broad in ventral aspect (cf. Maier & Short 2013 Fig. 9); reddish-brown in color; prosternum strongly deflexed ventrally in anterior half (cf. Maier & Short 2013 Fig. 10); apical maxillary palpomere strongly triangular (cf. Maier & Short 2013 Fig. 11)............................................ Lutrochus acuminatus Grouvelle
- Elytra not explanate, epipleuron appearing narrow in ventral aspect (Fig. 20); dark brown to black in color; prosternum very slightly or not deflexed ventrally in anterior half (Fig. 20); apical maxillary palpomere weakly triangular to disc-shaped (cf. Maier & Short 2013 Figs. 30, 37)......................................................................... 3
3(2) Body size small, total length 2.5–4.5 mm ................................................................... 4
- Body size large, total length 4.6–5.5 mm ................................................................... 8
4(3) Pronotum with lateral borders expanded (cf. Maier & Short 2013 Fig. 35); apical maxillary palpomere rounded to disc-shaped (cf. Maier & Short 2013 Fig. 37); apical metatarsomere setose (cf. Maier & Short 2013 Fig. 38); length 2.5–3.2 mm .................................................................................... L. maldonadoi Maier and Short
- Pronotum with lateral borders smooth with outline of body, not expanded; apical maxillary palpomere triangular (cf. Maier & Short 2013 Fig. 30); apical metatarsomere almost entirely glabrous (Fig. 10); length 3.0– 4.5 mm ..................... 5
5(4) Body strongly wedge-shaped............................................................... L. vestitus Sharp
- Body ovate or weakly wedge-shaped..................................................................... 6
6(5) Apical metatarsomere pubescent for at least half of length when viewed dorsally (Fig. 22); parameres of aedaegus with weak crenulations at border (Fig 23)................................................................. L. wao n. sp.
- Apical metatarsomere pubescent for significantly less than half of length when viewed dorsally (Fig. 10); parameres of aedaegus smooth, lacking weak crenulations at border (Fig 11)..................................................... 7
7(6) Apical protarsomere two-toned, dark brown to nearly apex, testaceous at apex; femora light brown dorsally and dark brown ventrally; tibiae dark brown (Fig. 5); apex of parameres not extended apically (Fig 6).................... L. funkae n.sp.
- Apical protarsomere, femora, and tibae entirely reddish-brown to testaceous (Fig 8); apex of parameres extended apically (Fig 11)............................................................................... L. grenadensis n. sp.
8(3) Apical protarsomere entirely glabrous (cf. Maier & Short 2013 Fig. 23).................... L. gustafsoni Maier and Short
- Apical protarsomere at least partially pubescent (cf. Maier & Short 2013 Fig. 18).................................. 9
9(8) Apex of protibia of male with distinct patch of long golden setae apically (Fig. 16)................... L. leeanneae n. sp.
- Apex of protibia of male with setae of similar length on entire surface (cf. Maier & Short 2013 Fig. 15)............... 10
10(9) Apical protarsomere with discrete pubescent patch in basal third, apical two-thirds glabrous (cf. Maier & Short 2013 Fig. 18); body without metallic sheen dorsally (cf. Maier & Short 2013 Fig. 14)..................... L. cauraensis Maier & Short
- Apical protarsomere pubescent, although more sparse in apical half (cf. Maier & Short 2013 Fig. 58); body with bluish-violet metallic sheen dorsally (cf. Maier & Short 2013 Fig. 55)................................. L. violaceous Maier & Short
11(1) Metasternum with medial circular glabrous patch (cf. Maier & Short 2013 Fig. 45); scutellum diamond-shaped (cf. Maier & Short 2013 Fig. 46); elytron with seven rows of shallow punctures (cf. Maier & Short 2013 Fig. 40); apical maxillary palpomere narrow (cf. Maier & Short 2013 Fig. 43)......................................... L. meridaensis Maier & Short
- Metasternum without medial circular glabrous patch (cf. Maier & Short 2013 Fig. 49); scutellum triangular (cf. Maier & Short 2013 Fig. 48); elytral punctation dense, confused, not in rows (cf. Maier & Short 2013 Fig. 52); apical maxillary palpomere wide (cf. Maier & Short 2013 Fig. 53)................................................. L. minutus Maier & Short
description: Published as part of Maier, Crystal A. & Short, Andrew Edward Z., 2014, Review of the Lutrochidae (Coleoptera) of the Guianas and Lesser Antilles, with description of four new species in Zootaxa 3895 (1), DOI: 10.11646/zootaxa.3895.1.3, http://zenodo.org/record/228001