Platymetopus quadrimaculatus Dejean, 1829

Kataev, Boris M., 2023, A review of Asian species of the genus Platymetopus (Coleoptera: Carabidae: Harpalini), Zootaxa 5306 (5), pp. 501-536 : 527-530

Platymetopus quadrimaculatus Dejean, 1829

( Figs. 52, 53 , 61, 62 , 67 , 72 )

Platymetopus quadrimaculatus Dejean, 1829: 70 . Type locality: “Cochinchine”, Southern Vietnam.

Type material. Syntype: male, with labels “ϐ”, “4-maculatus m. in Cochinchina ”, “ D. Guerin ”, and “Ex Musaeo Chaudoir” ( MNHN) .

Additional material examined. China. 1 male, “Chine, 7283”, “ Coll. Tschitchérine ” ( ZIN) ; 1 specimen, “ China ”, “Kinb.” ( NRM) . Fujian: 2 males, 3 females, “Amoy Galatea. Quadrimaculata Dej.” ( ZMUC) ; 1 female, “Amoy” [= Xiamen] ( ZMUC) . Hong Kong: 1 male, “Hong Kong”, “axillaris Chev. Murr. Coll.”, “Ex Musaeo H.W. Bates, 1892 ” ( MNHN) . Hainan: 1 male, 2 females, Hainan , 14.VI.1957 ( ZIN) ; 2 females, Danzhou, SC Tropical Agr. Univ., light trap, 19.50903°N 109.48934°E, 145 m, 16.V.2007, Ge Deyan leg. ( IOZ) ; 2 males, 1 female, Ledong, Jianfengling , township, on ground, 18.69804°N 108.79277°E, 13 m, 19.III.2007, day, H.L. Shi & F. Yuan leg. ( IOZ) ; 1 female, western coast of Hainan, near Chanhua town, Oizi Bay, sandy glades in coniferous forest with Casustrina equiscifolia, 6.IV.2011, M. Potapov leg. ( ZIN) ; 1 male, NE Foluo , station, 18°36′10″N 108°46′21″E, 17 m, 14.XI.2017, I. Kabak leg. (cIKAB) . Vietnam. Nghe An: 2 males, 2 females, Vinh , 19.V.1987, M.Yu. Savitsky leg. ( ZIN) . Quang Binh: 1 female, mts SW Dong Hoi, 18.III.1963, O. Kabakov leg. ( ZIN) ; 1 male, “Mi Dyk”, SW Dong Hoi, 20.III.1963, O. Kabakov leg. ( ZIN) . Bing Duong: 1 female, ca 60 km N Ho Chi Min, env. Phu Giao Vill. , 3–13.X.1994, A. Napolov & D. Volkov leg. ( MPU) . Dong Nai: 3 males, 8 females, Nam Cat Tien Nat. Park , at light HQL450, 30.V.–11.VI.2005, D. Fedorenko leg. (Exp. Russ. - Vietnamese Tropical Centre) ( SIEE, ZIN) . Ba Ria-Vung Tau: 2 males, 3 females, Binh Chau-Phuoc Buu Nat. Res., ca 50 m, 10°32′N 107°29′E, VI.2007 A.V.Abramov leg. (Exp. Russ. - Vietnamese Tropical Centre) ( ZIN) . Laos. 1 female, Vientiane, 23.I.1986, O. Kabakov leg. ( ZIN) . Thailand. Chiang Mai: 1 female, Chom Thong , 24–27.IV.1991, Pacholatko leg. ( NME) ; 1 female, “ Chiang Mai, 6.V.1988 ” ( SMNS) . Lan Sak : 2 males, 2 females, 25 km NW Lan Sak, 65 km NW Uthai Thani, VI.1990, Thielen leg. (cJS) . Ta Phraya: 2 females, Ta Phraya National Park , La Lu, 127 m, 14°02′32′′N 102°34′32′′E, 16.V.2010, V. Zinchenko leg. ( ISEN, ZIN) , 1 male, same data, but 15–19.V.2010, A.V. Korshunov leg. ( ISEN) . Nakhon Ratchasima (Korat): 2 females, Nong Bun Nak , 8.II.–8.III.2008, A.V. Korshunov leg. (cKRS, ZIN) . Loei: 1 female, Phu Ruea , 735 m, 17°27′10.2″N 101°29′25.7″E, 26–28.V.2010, A.V. Korshunov leg. ( ISEN) .

Description. Body length: 6.3–7.6 (m 7.0) mm. Body proportions in Table 1 . Habitus as in Fig. 67 .

Body dark brown to black; dorsum slightly shiny, with or without metallic green tinge; labrum, narrow lateral margins of pronotum and in some specimens also epipleura of pronotum and elytra (apically) brown; each elytron with an elongate yellow humeral macula, occupying intervals 6 and 7, occasionally also intervals 5 and 8, and a more or less transverse preapical macula, occupying intervals 4–7 or occasionally also intervals 1–3 and 8; elytral apex dark, rarely pale on interval 1; preapical yellow macula often divided in two macula: a larger and more proximal macula on intervals 4–8 and smaller and a more distal macula on intervals 1–3. Apical palpomeres and antennae from antennomere 3 or 4 markedly infuscate to black; basal antennomeres and legs brownish yellow; femora occasionally more or less infuscate to black.

Head with large convex eyes; tempora short and flat; genae slightly wider than antennomere 1. Labral apex shallowly concave at middle. Supraorbital pore small, located close to supraorbital suture at level of posterior margin of eye. Frons and vertex densely and coarsely punctate, generally without microsculpture, occasionally with obliterate transverse meshes between punctures. Mandibles short, with almost straight mesal margin apically. Antennae moderately long, slightly surpassing pronotal basal margin; antennomeres 4–8 about 2.5 times as long as wide.

Pronotum comparatively wide, widest before middle. Sides rounded in apical half and almost rectilinearly converging in basal half; lateral bead complete, very narrow throughout; lateral furrow narrow, recognized from apical to basal angles; medial lateral seta inserted slightly before widest point. Apical margin shallowly emarginate, bordered along entire length. Apical angles only slightly prominent anteriorly, wide, rounded at apex. Basal margin slightly longer than apical margin and slightly shorter than elytral base, distinctly bordered along entire length, ciliate. Basal angles obtusangular, generally with a tiny acute or obtuse denticle at apex. Disc moderately convex, more or less depressed laterobasally. Basal foveae wide, outlines indistinct, moderately deepened, fused with shallower laterobasal depressions. Median line superficial, short, markedly not reaching anterior and basal margins. Anterior and posterior transverse depressions very wide and shallow or almost indistinct. Surface densely punctate, without microsculpture between punctures on disc; obliterate meshes usually recognized along lateral margins.

Elytra oval, widest behind middle, convex on disc and moderately sloping to apex. Humeri slightly prominent, angularly rounded, with a tiny denticle. Lateral margins smooth along entire length. Preapical sinuation shallow, not long; sutural angle acutangular, narrowly rounded or only blunted at tip. Basal border slightly sinuate, forming a very obtuse angle with lateral margin. Striae slightly impressed along entire length, punctate anteriorly, gradually becoming smooth behind middle. Intervals generally slightly convex and equally wide. Discal setigerous pores absent. Marginal umbilicate series more or less clearly divided in basal and apical groups, each consisting of 6–8 setigerous pores. Punctation distinct and dense, with three to five punctures across each interval in its middle portion. Microsculpture between punctures present throughout, consisting of slightly transverse meshes.

Prosternal process bordered. Proepisternum distinctly punctate. Metepisternum narrow, much longer than wide, strongly narrowed posteriorly. Wings fully developed.

Metatarsus slender, about as long as HWmin, in both sexes moderately densely setose ventrally. Male pro- and mesotarsomeres 1–4 only slightly dilated, each with adhesive vestiture.

Apex of abdominal sternite subtruncate or slightly concave in male and rounded in female, in both sexes with two pairs of marginal setigerous pores.

Female genitalia ( Figs. 61, 62 ): laterotergite with membranous angulate apex and with several apical seta; distal mesal angle of gonosubcoxite not prominent, with a long seta at apex; gonocoxite narrow, about as long as gonosubcoxite, with two short and thin setae on dorsal ridge of outer side.

Median lobe of aedeagus ( Figs. 52, 53 ) with relatively small basal bulb; in lateral view rather evenly slightly arcuate; apex slightly bent ventrally, without a ventroapical denticle; in dorsal view median lobe almost straight, narrowed basally and apically; terminal lamella slightly longer than wide, rounded apically; internal sac without spines and spiny patches.

Comparison. This species is easily recognized among other Asian congeners by having a dark elytron with basal and preapical yellow maculae isolated from each other and with a dark apex.

Distribution ( Fig. 72 ). Described from “Cochinchine” (Southern Vietnam) without more precise data. Later, Bates (1889) recorded P. quadrimaculatus from the following localities in Vietnam: “Tourane” [Da Nang], “Qui-Nhon” [Quy Nhon, Binh Dinh Prov.], Hue [Thua Thien Hue Prov.], and Saigon. Andrewes (1930) cited this species from Siam, Cochin-China, Annam, and China. More recently, it was recorded from Fujian ( Hua 2002), Taiwan ( Kataev et al. 2003), Hong Kong ( Aston 2016), and Hainan ( Kataev & Wrase 2017). Thus, according to the recent data, P. rugosus is distributed in Southeast China, Vietnam, Laos, and Thailand.

Remarks. After publication of the original description of P. quadrimaculatus, Dejean & Boisduval (1834) illustrated the general view of this species.

The specimens examined from Southeast China and North Vietnam predominantly have dark femora, while those from Southern Vietnam, Laos and Thailand have brownish yellow femora not darker than the tibia. Further study is needed to decide if the specimens from Southeast China and North Vietnam warrant a subspecific status.

Figures

FIGURE 72. Platymetopus quadrimaculatus Dejean, 1829, distribution (black circles, based on examined material; white circles, based on literature data).

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 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 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).