Platymetopus, Dejean, 1829

Kataev, Boris M., 2023, A review of Asian species of the genus Platymetopus (Coleoptera: Carabidae: Harpalini), Zootaxa 5306 (5), pp. 501-536 : 504

Key to Asian species of Platymetopus

1. Elytra brown to black, with a yellow pattern................................................................ 2

- Elytra blackish brown to black, unicolorous, in some species with metallic green or bronze tinge...................... 3

2. Elytra elongate, subparallel-sided, with an elongate yellow stripe on intervals 6–8 along their entire length (intervals 7 and 8 often, rarely also 6, darkened at short distance in apical half) and with yellow apices of other intervals ( Fig. 68 ). Mandibles elongate, curved apically ( Fig. 69 ). Pronotal sides with short prebasal sinuation.Antennae brownish yellow, not or only slightly infuscate. Median lobe of aedeagus as in Figs. 54 and 56 . Body length 7.0– 8.2 mm ...... P. figuratus pictus Andrewes, 1923

- Elytra oval, rounded at sides, with basal and preapical yellow maculae isolated from each other and with more or less dark apices ( Fig. 67 ). Mandibles short, not curved apically. Pronotal sides rounded or almost rectilinear, not sinuate basally.Antennae with two or three basal segments brownish yellow, other antennomeres clearly infuscate to black. Median lobe of aedeagus as in Figs. 52 and 53 . Body length 6.3–7.6 mm ...................................... P. quadrimaculatus Dejean, 1829

3. Elytral lateral margin slightly serrate basally ( Fig. 44 ). Antennae dark, almost black, with basal segments clearly infuscate. Genae very narrow, eyes ventrally almost touching buccal fissure. Body dark brown to black, without metallic green or bronze shine. Median lobe of aedeagus with a preapical spine in internal sac ( Figs. 48, 51 ). Body length 6.2–7.2 mm ......................................................................................... P. rugosus ( Nietner, 1857) (4)

- Elytral lateral margin smooth along entire length. Antennae with at least one, generally two or three, basal segments yellow or brownish yellow, not infuscate. Genae wider, slightly wider than antennomere 1. Body with or without metallic green or bronze shine. Median lobe of aedeagus without spine in internal sac. Body length 6.1–9.4 mm .............................. 5

4. Femora and tibiae yellow, femora not infuscate. Pronotum relatively narrower (PWmax/PL 1.53–1.63) ( Fig. 43 )................................................................................... P. rugosus rugosus ( Nietner, 1857)

- Femora more or less infuscate, darker than tibiae. Pronotum relatively wider (PWmax/PL 1.65–1.67) ( Fig. 45 )................................................................................. P. rugosus obscurofemoratus subsp. n.

5. Pronotum less strongly narrowed basally (PWmax/PWmin-bas 1.16–1.24; PWmin-bas/PWmin-ap 1.18–1.25), with more or less rectilinear sides in front of less obtuse basal angles ( Fig. 42 ). Humeri generally with a tiny acute denticle visible behind, sometimes without it. Median lobe ( Figs. 46, 47 ) in lateral view more arcuate apically and with less sharply bent apex lacking a ventroapical denticle. Gonocoxite about as long as gonosubcoxite ( Figs. 57, 58 ). Femora and tibiae yellow, femora not infuscate. Body, on average, smaller: length 6.1–7.5 mm ....................................... P. tritus Bates, 1889

- Pronotum more strongly narrowed basally (PWmax/PWmin-bas 1.18–1.35; PWmin-bas/PWmin-ap 1.00–1.23), sides rounded or occasionally almost rectilinear in front of more obtuse basal angles. Humeri generally without denticle, occasionally with a tiny obtuse denticle recognizable behind. Median lobe ( Figs. 7–12 , 15, 20 , 27, 31 , 35, 40 ) in lateral view less strongly curved in apical portion and with more sharply bent apex having generally a small ventroapical denticle. Gonocoxite markedly shorter than gonosubcoxite ( Figs 5, 6 ). Femora and tibiae from yellow to black. Body, on average, larger: length 6.6–9.4 mm ................................................................................ P. flavilabris ( Fabricius, 1798) (6)

6. Pronotum finely punctate on disc medially (as in Figs. 1, 2 , 13–14 ), with more or less distinct fine microsculpture; occasionally without microsculpture................................................................................. 7

- Pronotum somewhat coarsely rugose-punctate on disc medially (as in Figs. 21, 22–26 , 32, 33 ), without microsculpture..... 8

7. Legs yellow or brownish yellow, with femora not darker than tibiae, tarsi slightly infuscate ( Figs. 1, 2 ). Microsculpture on pronotal disc very fine and obliterate, usually not forming distinct meshes........ P. flavilabris flavilabris ( Fabricius, 1798)

- Femora more or less infuscate, darker than tibiae; apices of tibiae often slightly infuscate; occasionally femora not infuscate; tarsi slightly or markedly infuscate ( Figs. 13, 14 ). Microsculpture more distinct, usually forming slightly transverse meshes........................................................................ P. flavilabris thunbergi Quensel, 1806

8. Legs black throughout or with tibiae paler (brown) basally ( Figs. 21–26 ).............. P. flavilabris laticeps Dejean, 1829

- Legs yellow or brownish yellow, with femora not darker than tibiae; tarsi more or less infuscate ( Figs. 32, 33 )............................................................................... P. flavilabris punctulatus ( MacLeay, 1825)

Figures

FIGURES 67–71. Platymetopus spp. 67, P. quadrimaculatus Dejean, 1829 (Vietnam); 68, 69, P. figuratus pictus Andrewes, 1923 (India, Rajasthan); 70, 71, P. f. figuratus Boheman, 1848 (70, Tanzania; 71, Namibia). Habitus (67, 68), head (69, 70; 69 without labrum) and fore-body (71). Scale bars = 1.0 mm (A: 67, 68; B: 69–71).

FIGURES 46–56. Platymetopus spp., median lobe of aedeagus. 46, 47, P. tritus Bates, 1889 (Vietnam); 48, 49, P. rugosus rugosus (Nietner, 1857) (India); 50, 51, P. r. obscurofemoratus subsp. n. (Vietnam, holotype); 52, 53, P. quadrimaculatus Dejean, 1829 (Vietnam); 54–56, P. figuratus pictus Andrewes, 1923 (India, Rajasthan). Dorsal (46, 48, 50, 52, 54) and lateral (47, 49, 51, 53, 55, 56) views. Scale bars = 1.0 mm (A: 46–53, B: 54–56).

FIGURES 42–45. Platymetopus spp., habitus (42, 43, 45) and humerus (44). 42, P. tritus Bates, 1889 (Vietnam); 43, P. rugosus rugosus (Nietner, 1857) (India); 44, 45, P. r. obscurofemoratus subsp. n. (Vietnam, holotype). Scale bars = 1.0 mm (A: 44, B: 42, 43, 45).

FIGURES 57–64. Platymetopus spp., gonocoxite, lateral view (57, 59, 61, 63), and laterotergite, gonosubcoxite, and gonocoxite, ventral view (58, 60, 62, 64). 57, 58, P. tritus Bates, 1889 (Vietnam); 59, 60, P. rugosus (Nietner, 1857) (India); 61, 62, P. quadrimaculatus Dejean, 1829 (Vietnam); 63, 64, P. figuratus pictus Andrewes, 1923 (India, Rajasthan). Scale bar = 0.5 mm.

FIGURES 3–12. Platymetopus flavilabris (Fabricius, 1798): P. f. flavilabris (3, 5, 7–12), P. f. laticeps Dejean, 1829 (6). 3–5, 9, 10, Nepal; 6, China (Fujian); 7, 8, Sri Lanka; 11, 12, Myanmar (Yangon). 3, labium; 4, gonocoxite; 5, 6, laterotergite, gonosubcoxite, and gonocoxite; 7–12, median lobe of aedeagus. Lateral (4, 8, 10, 12), ventral (3, 5, 6) and dorsal (7, 9, 11) views. Scale bar = 1.0 mm.

FIGURES 15–20. Platymetopus flavilabris thunbergi Quensel, 1806, median lobe of aedeagus. 15, 16, Southern Vietnam; 17, 18, Laos; 19, 20, Thailand. Dorsal (15, 17, 19) and lateral (16, 18, 20) views. Scale bar = 1.0 mm.

FIGURES 27–31. Platymetopus flavilabris laticeps Dejean, 1829, median lobe of aedeagus. 27, 28, Japan; 29, 39, China (Yunnan); 31, China (Fujian). Dorsal (27, 29) and lateral (28, 30, 31) views. Scale bar = 1.0 mm.

FIGURES 35–40. Platymetopus flavilabris (Fabricius, 1798):P.f.laticeps Dejean, 1829 (35–38) and P. f.punctulatus (MacLeay, 1825) (39, 40), median lobe of aedeagus. 35, 36, Philippines; 37, 38, Moluccas (Ternate); 39, 40, Sumbawa. Dorsal (35, 37, 39) and lateral (36, 38, 40). Scale bar = 1.0 mm.

FIGURES 1–2. Platymetopus flavilabris flavilabris (Fabricius, 1798), habitus. 1, South India; 2, Nepal. Scale bar = 1.0 mm.

FIGURES 13–14. Platymetopus flavilabris thunbergi Quensel, 1806, habitus. 13, Laos; 14, Southern Vietnam. Scale bar = 1.0 mm.

FIGURES 21–22. Platymetopus flavilabris laticeps Dejean, 1829 (transition to P. f. thunbergi Quensel, 1806). 21, Northern Vietnam; 14, Hainan). Scale bar = 1.0 mm.

FIGURES 23–24. Platymetopus flavilabris laticeps Dejean, 1829, habitus (Japan). Scale bar = 1.0 mm.

FIGURES 25–26. Platymetopus flavilabris laticeps Dejean, 1829, habitus (Philippines). Scale bar = 1.0 mm.

FIGURES 32–34. Platymetopus flavilabris punctulatus (MacLeay, 1825) (32, 33, habitus; 34, labels). 32, Sumbawa; 33, Sulawesi, holotype of P. subrugosus Schauberger, 1938. Scale bar = 1.0 mm.