Elmomorphus reticulatus, Selnekovič & Jäch & Kodada, 2024

Selnekovič, Dávid, Jäch, Manfred A. & Kodada, Ján, 2024, Taxonomic revision of the genus Elmomorphus Sharp, 1888. II. Redescription of the genus and review of the species from India, Nepal, Bhutan, Myanmar, China, Thailand, Laos, Cambodia, and Vietnam (Coleoptera: Dryopidae), European Journal of Taxonomy 957, pp. 1-229 : 188-190

Elmomorphus reticulatus sp. nov.

urn:lsid:zoobank.org:act:49D3C75A-5861-4EEC-8FEC-1090B0FE7056

Figs 92–93 , 115A

Differential diagnosis

Elmomorphus reticulatus sp. nov. ( Fig. 92 ) may be separated from all other congeners by its conspicuous coarse elytral microreticulation formed by small irregular meshes. The dorsal plastron is confined to small areas around the antennal insertions. The ventral plastron is absent only on the prosternal process and the median part of the metaventrite. The elytral punctures are relatively small and indistinct, scattered over the entire surface.

Etymology

The epithet is a Latin adjective in the nominative singular referring to the strong elytral reticulation.

Type material

Holotype

CHINA – Hainan Province • ♂; “CHINA: Hainan ([CWBS] 194) 30km E Maoyang , 18.1. Wuzhi Shan Resort 1996 700-800m, leg. Jäch ”; IAECAS.

Paratypes

CHINA – Hainan Province • 10 ♂♂, 4 ♀♀, 2 ex.; same collection data as for holotype; CKB, NMW • 11 ex.; “ CHINA: Hainan ([CWBS] 188) 7km W Qiongzhong Baihua Ling , 300m 16.1.1996, leg. Jäch ”; CKB, NMW • 2 ex.; “ CHINA: Hainan ([CWBS] 191) 4 kmW Qiongzhong 150m 16.1.1996, leg. Jäch ”; NMW • 18 ex.; “ CHINA: Hainan, ([ CWBS] 193) 30km E Maoyang 600 m Wuzhi Shan resort, 1996 17./18.1., leg. Ji & Wang ”; CKB, NMW • 1 ex.; “ CHINA: Hainan ([CWBS] 198) 3 km NE Maoyang Wuzhi Shan Riv. , 100m 19.1.1996, Ji & Wang ”; NMW • 1 ex.; “ CHINA: Hainan ([CWBS] 204) 4km E Jianfeng , 150 m Jianfeng Mt. , 1996 22./24.1., Ji & Wang ”; NMW • 1 ex.; “ CHINA: Hainan, ([CWBS] 205) Jianfeng Mts. , 800m 5km NE Tian Chi 22.1.1996, leg. Jäch ”; NMW • 5 ex.; “ CHINA: Hainan, ([CWBS] 207) Jianfeng Mts. , 800m 500m NE Tian Chi 22.1.1996, leg. Jäch ”; NMW • 1 ex.; “ CHINA: Hainan ([CWBS] 208) Jiangfeng Mts. , 800 m 5km E Tian Chi 23.1.1996, leg. Ji & Wang ”; NMW • 1 ex.; “ CHINA: Hainan isl. [MF17a] Limushan Mts. , 3 km NNW of first administr. centre, at a dam 19°10′N 109°44′E [at light] 560 m; 6.v.2011, Fikáček lgt.”; NMPC .

Type locality

China, Hainan Province, Qiongzhong County; stream, ca 5 m wide, densely shaded, flowing partly through a deep gorge in primary forest, above Wuzhi Shan Resort; ca 700–800 m a.s.l. (CWBS 194; Jäch & Ji 1998).

Description

Measurements (mm): TL: ♂♂ 3.00–3.54 (3.30 ±0.17, n=11), ♀♀ 3.29–3.50 (3.39 ±0.10, n= 4); PL: ♂♂ 0.73–0.83 (0.79± 0.03, n =11), ♀♀ 0.79–0.83 (0.81± 0.03, n =4); PW: ♂♂ 1.43–1.71 (1.60± 0.08, n= 11), ♀♀ 1.58–1.71 (1.66 ±0.05, n =4); EL: ♂♂ 2.16–2.60 (2.39 ± 0.13, n=11), ♀♀ 2.44–2.57 (2.53 ± 0.06, n =4); EW: ♂♂ 1.69–2.00 (1.89± 0.09, n=11), ♀♀ 1.87–2.03 (1.96 ± 0.07, n =4); PhL: 0.49–0.58 (0.54± 0.03, n =11); PrL: 0.29–0.34 (0.32 ± 0.02, n=11).

Body oval, strongly convex dorsally ( Fig. 93 ). Integument black; mouth parts, antennae, and legs reddish brown. Pubescence yellowish. Dorsal plastron absent, ventral plastron lacking on prosternal process and median part of metaventrite.

Dorsal surface of head smooth, with round punctures slightly smaller than an eye facet, separated by 1.0–1.5 × puncture diameter. Labrum transverse, anterior margin slightly emarginate, exposed portion microreticulate with small setiferous punctures; setae equally long. Anterior margin of clypeus straight. Eyes rather small, oval; interfacetal setae short, ID: ♂♂ 0.48–0.57 mm (0.53± 0.03, n= 11), ♀♀ 0.51– 0.55 mm (0.53± 0.02, n=4), APD/ID: ♂♂ 1.68–1.76 (1.71 ±0.03, n =11), ♀♀ 1.72–1.84 (1.79± 0.06, n= 4). Antennae 11-segmented, densely setose.

Pronotum strongly convex, PW/PL: ♂♂ 1.95–2.13 (2.03± 0.06, n=11), ♀♀ 2.00–2.10 (2.05 ± 0.05, n= 4); anterior margin rimmed laterally, twice as wide as one eye facet; anterior angles moderately prominent, strongly deflexed; lateral pronotal sides convergent, strongly rounded; surface smooth, with round punctures, microgranules lacking. Prosternal process wider than long, lateral edges divergent, straight, posterior edge rounded; lateral portions rather wide, moderately raised, without groups of long setae in both sexes; median keel moderately arcuate. Scutellum wider than long, with round punctures. Metaventrite with median part slightly convex, posteriorly widened, without groups of long setae. Elytra strongly convex, widest before middle, EL/EW: ♂♂ 1.22–1.33 (1.26± 0.03, n=11), ♀♀ 1.27–1.31 (1.29 ± 0.02, n =4); dorsal surface with strong microreticulation consisting of minute irregular meshes; small punctures scattered over entire surface; pubescence almost inapparent, consisting of very short and thin setae. Tibiae slightly curved; protibia ca 1.5 × as long as protarsus, PrTL/PL: ♂♂ 0.94–0.98 (0.96 ± 0.02, n= 11), ♀♀ 0.94–1.00 (0.97 ± 0.03, n= 4). Terminal protarsomere slightly longer than three preceding tarsomeres combined.

Ventrites covered with plastron. Ventrite 5 rounded at apex, in females with short longitudinal keel before apex. Aedeagus ( Fig. 93 ): phallobase rather robust, slightly expanded basally, PhL/PrL: 1.60– 1.77 (1.68± 0.05, n= 11); parameres rather slender, moderately curved ventrad, apices rounded (lateral aspect); penis wide, apex rounded; sclerotised fibula short.

Secondary sexual dimorphism

Ventrite 5 in females with short longitudinal subapical keel.

Distribution

China (Hainan) ( Fig. 115A ).

Figures

Fig. 92. Elmomorphus reticulatus sp. nov., holotype, male (IAECAS), TL: 3.20 mm.

Fig. 93. Elmomorphus reticulatus sp. nov., paratype from type locality (CKB), aedeagus. A. Lateral aspect. B. Ventral aspect. Scale bar: 0.1 mm.

Fig. 115. Distribution maps.A. Elmomorphus reticulatus sp. nov.B. E. superficialis sp. nov.C. E. hamatus sp. nov. D. E. oblongus sp. nov. E. E. glabriclunis sp. nov. F. E. simplex sp. nov.