Elmomorphus globosus, 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 : 167-171

Elmomorphus globosus sp. nov.

urn:lsid:zoobank.org:act:9D067B2D-1CE1-47F2-AA40-9A5494F3751C

Figs 81–82 , 114A

Differential diagnosis

Elmomorphus globosus sp. nov. ( Fig. 81 ) is characterised by having the dorsal plastron confined to small areas around the antennal insertions. The elytron has nine narrow, distinct striae; the strial punctures are deeply impressed, about as coarse as the eye facet, becoming shallower and smaller apically. The pronotum is distinctly microreticulate/micropunctate on most of the surface except for a narrow posterior portion; posterior angles bear round microgranules. Males have conspicuous long setae along the anterior clypeal margin and one pair of clusters of long setae on each prosternal process and the median part of the metaventrite. These characters are shared by E. schillhammeri sp. nov., which can be separated by the larger size (TL in E. schillhammeri : ♂♂ 4.15–4.36 mm (4.27± 0.07, n= 8), ♀♀ 4.03– 4.38 mm (4.24 ± 0.13, n=5), in E. globosus : ♂♂ 3.42–3.56 mm (n= 2), ♀♀ 3.42–3.70 mm (3.55 ± 0.09, n= 10)) and by having the greatest body width behind the elytral midlength. In E. schillhammeri , the small microgranules cover the entire pronotal and elytral surface, and the lateral pronotal sides are distinctly rounded but almost straight in E. globosus .

Etymology

The Latin adjective ‘globosus’ (= ‘round, spherical’) refers to the broadly oval and strongly convex body shape.

Type material

Holotype

CHINA – Guizhou Province • ♀; “CHINA-Guizhou 21-26.V. 60 km N Kali [= Kaili], 1995 Shibing Yuntai Shan Jendek & Šauša leg. [yellow label]”; NMW.

Paratypes

CHINA – Hubei Province • 1 ♂, 2 ♀♀; “CHINA: Hubei, 22.10.2004 Xingdoushan Nat. Res. 100 km SW Enshi 700 - 750 m, leg. Wang & Schönmann (CWBS 546)”; CKB, NMW • 1 ♀; “ CHINA: Hubei, 16.10.2004 Shennongjia Forest Distr. 30 km E Muyu , Jiu Chong 850 m, leg. Schönmann & Wang (CWBS 537)”; NMW • 3 ♀♀; “ CHINA: Hubei, 16.10.2004 Shennongjia Forest Distr. 35 km SE Muyu 700 m, leg. Schönmann & Wang (CWBS 538)”; NMW • 1 ♂, 3 ♀♀; “ CHINA: Hubei, 23.10.2004 Tongpenshui Forest Park 30 km NW Enshi 1200 m, leg. Schönmann & Wang (CWBS 547)”; CKB, NMW. – Hunan Province • 2 ♀♀; “ CHINA: NW-Hunan , 1993, Wulingyuan, N Dayong , Suoxiyu , 31.10., 450 m leg. Schillhammer (6) [CWBS 25]”; NMW .

Type locality

China, Guizhou Province, north of Shibing, Yuntai Shan.

Description

Measurements (mm): TL: ♂♂ 3.42–3.56 (n =2), ♀♀ 3.42–3.70 (3.55 ± 0.09, n=10); PL: ♂♂ 0.92– 1.12 (n =2), ♀♀ 0.85–0.94 (0.91 ± 0.03, n=10); PW: ♂♂ 1.73–1.75 (n=2), ♀♀ 1.60–1.79 (1.71 ± 0.05, n= 10); EL: ♂♂ 2.60–2.76 (n =2), ♀♀ 2.58–2.93 (2.72± 0.09, n =10); EW: ♂♂ 2.06–2.13 (n =2), ♀♀ 1.95–2.15 (2.09± 0.06, n =10); PhL: 1.27; PrL: 1.52.

Body broadly oval, strongly convex dorsally ( Fig. 81 ). Integument black; mouthparts, antennae, and trochanters reddish-brown, remaining parts of legs dark brown. Pubescence consisting of very short and thin, almost inapparent yellowish setae. Plastron covering small areas around antennal insertions and the ventral surface, except for prosternal process, median parts of metaventrite, and ventrite 1.

Head densely micropunctate/microreticulate, rough, with few microgranules and round punctures with diameter subequal to facet diameter; punctures hardly discernible on rough surface. Labrum transverse, anterior margin broadly emarginate; microreticulate on exposed portion, with small round setiferous punctures; setae distinctly longer in males than in females. Anterior margin of clypeus straight. Eyes round, interfacetal setae short, ID: ♂♂ 0.66–0.70 mm (n =2), ♀♀ 0.60–0.68 mm (0.65± 0.02, n =10). Antennae 9-segmented, densely setose.

Pronotum transverse, moderately convex, widest at base; PW/PL: ♂♂ 1.55–1.89 (n=2), ♀♀ 1.80– 2.00 (1.89± 0.06, n=10); surface with shallow very dense micropunctures appears microreticulated, intermixed with larger punctures (subequal facet diameter); microgranules present in posterolateral portions; rim of anterior margin as wide as 2–3 eye facets, broadly interrupted medially; anterolateral angles prominent, acute; lateral sides convergent, very slightly rounded. Prosternal process rather short, wider than long, lateral edges divergent, straight, apical edge rounded; lateral portions rather wide, moderately raised, with two clusters of setae anteriorly in males; median keel slightly arcuate. Scutellum wider than long, punctate. Metaventrite with median part slightly convex, posteriorly widened, with two clusters of setae in males; lateral margins of metaventral process raised, distinctly separated medially. Elytra rather short, wide, strongly convex, widest before middle; EL/EW: ♂♂ 1.29–1.30 (n =2), ♀♀ 1.22–1.38 (1.30±0.04, n=10); surface distinctly microreticulate, with small, scattered punctures and with large deeply impressed punctures arranged in nine regular rows, punctures distinctly separated by 2–3 puncture diameters. Tibiae slightly curved; protibia 1.5× as long as protarsus; PrTL/PL: ♂♂ 0.97–1.10 (n =2), ♀♀ 0.97–1.13 (1.06 ± 0.04, n=10). Terminal protarsomeres as long as three preceding tarsomeres combined.

Ventrites covered with plastron, except on middle of ventrite 1 delimited laterally by indistinct longitudinal keel on each side. Ventrite 5 rounded at apex. Aedeagus ( Fig. 82 ): phallobase long and slender, PhL/PrL: 2.45 (n=1); parameres weakly curved ventrad, apices rounded (lateral aspect); penis narrowly rounded at apex; sclerotised fibula rather short and slender.

Secondary sexual dimorphism

Male with conspicuous long setae concentrated along anterior clypeal margin and in two clusters of setae in lateral portions of prosternal process and median part of metaventrite.

Distribution

China (Guizhou, Hubei, Hunan) ( Fig. 114A ).

Figures

Fig. 81. Elmomorphus globosus sp. nov., paratype, male from China, locality CWBS 546 (CKB), TL: 3.64 mm.

Fig. 82. Elmomorphus globosus sp. nov., paratype from China, locality CWBS 546 (CKB), aedeagus. A. Lateral aspect. B. Ventral aspect. Scale bar: 0.1 mm.

Fig. 114. Distribution maps. A. Elmomorphus globosus sp. nov. B. E. ovalis Kodada, Selnekovič & Jäch sp. nov. C. E. minutus sp. nov. D. E. jii sp. nov. E. E. schoenmanni sp. nov. F. E. vietnamensis sp. nov.