Elmomorphus comosiclunis, 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 : 211-213

Elmomorphus comosiclunis sp. nov.

urn:lsid:zoobank.org:act:BBFE4ED5-2CFC-4A4F-989B-69D15D2F9A15

Figs 104– 105 , 106E , 116

Differential diagnosis

Elmomorphus comosiclunis sp. nov. ( Fig. 104 ) is characterised by the strongly convex body; the dorsal plastron is confined to small areas around the antennal insertions; the elytral punctation is uniform and striae are absent; ventrite 1 is entirely covered with plastron. In general appearance, this species strongly resembles E. glabriclunis sp. nov. and E. simplex sp. nov.; it differs from both in the presence of remarkably long setae on a large flat oval area on male ventrite 5; female ventrite 5 is simple, evenly convex, and plastron lacking on a narrow area along the posterior margin. The bursa copulatrix has numerous small microsclerites scaterred in proximal and distal part ( Fig. 106E ).

Etymology

The epithet, a noun (nominative singular) in apposition, is composed of the Latin adjective ‘comosus’ (‘very hairy’) and the Latin noun ‘clunis’ (‘rump’). The name refers to the conspicuous cluster of long setae on the male ventrite 5.

Type material

Holotype

CHINA – Fujian Province • ♂; “CHINA: FUJIAN, Guangze Wuyi Shan , 12 km S Zhima Li Fang , 400m, 22. 1. 1997 leg. H.Schönmann (CWBS 252)”; IAECAS.

Paratypes

CHINA – Fujian Province • 1 ♀; same collection data as for holotype; NMW • 1 ♀; “ CHINA: FUJIAN, Chong’an Wuyi Shan , 3 km W Da’an 500m, 19.1.1997 leg. H. Schönmann (CWBS 250)”; NMW • 2 ♂♂; “ CHINA: FUJIAN, Longyan Jiangshan (20 km N Longyan) Keshan monastery, 900m Meihua Shan , 28.1.1997 leg. Ji & Wang (CWBS 260)”; CKB, NMW • 1 ♂; “ CHINA: FUJIAN, Longyan 2 km S Dachi , 750m Ceyan Shan , 29.1.1997, leg. Ji & Wang (CWBS 262)”; NMW • 2 ex.; “ CHINA: FUJIAN, Xiaochi (20 km W Longyan ) Meihua Shan , 650m, 30.1.1997, leg. Ji & Wang (CWBS 263)”; NMW • 3 ♂♂; “ CHINA: FUJIAN, Longyan Shizhong, Shangfang Shan 850m, 31.1.1997 leg. Ji & Wang (CWBS 264)”; CKB, NMW. – Guangdong Province • 3 ♂♂; “ CHINA: Guangdong Prov. Huaiji - Yangshan rd. 3.11.2001, ca. 530 m leg. Jäch, Komarek & Wang (CWBS 464)”; NMW • 1 ex.; “ CHINA: Guangdong Prov. Nanling N.P. , Yao Shan 24°53′03″N 112°57′37″E 4.11.2001, ca. 950 m Jäch & Komarek (CWBS 468)”; NMW • 1 ♀; “ CHINA: Guangdong Prov. Changjia - Ruyan rd., ca. 40 km E Changjia 5.11.2001 Jäch & Komarek (CWBS 471)”; NMW .

Type locality

China, Fujian Province; Jianyuan Prefecture; Guangze County [= Shuanxi]; 12 km south of Zhima Town and 2 km north of Li Fang Village; small stream flowing from forested mountains (broadleaf trees, bamboo and Cunninghamia ), ca 1 m wide, partly shaded by bushes, pools (filled with sand) and sections with granitic rocks and coarse crystalline gravel, 400 m a.s.l. (CWBS 252; Jäch & Ji 1998).

Description

Measurements (mm): TL: ♂♂ 3.59–3.87 (3.69 ± 0.08, n =10), ♀♀ 3.41–4.03 (3.69 ± 0.26, n =5); PL: ♂♂ 0.73–0.83 (0.79± 0.03, n= 10), ♀♀ 0.73–0.85 (0.79 ± 0.04, n=5); PW: ♂♂ 1.71–1.79 (1.74± 0.02, n= 10), ♀♀ 1.58–1.85 (1.69± 0.11, n=5); EL: ♂♂ 2.83–3.06 (2.90± 0.07, n=10), ♀♀ 2.67–3.22 (2.90 ± 0.23, n =5); EW: ♂♂ 2.02–2.11 (2.04 ±0.03, n =10), ♀♀ 1.92–2.18 (2.02 ±0.11, n= 5); PhL: 0.57–0.65 (0.63± 0.03, n =7); PrL: 0.52–0.57 (0.55 ±0.02, n =7).

Body obovate, strongly convex dorsally ( Fig. 105 ). Integument black; antennae, mouthparts, and legs reddish-brown. Pubescence consists of very short yellowish setae. Plastron covers small area around antennal insertions and ventral surface, except prosternal process and median part of metaventrite.

Dorsal surface of head smooth, with round punctures slightly smaller than an eye facet, separated by 0.5–1.0 × puncture diameter. Exposed portion of labrum microreticulate, with small setiferous punctures; setae somewhat longer in males than in females. Eyes oval, interfacetal setae short. Antennae 10-segmented, densely setose.

Pronotum transverse, moderately convex, PW/PL: ♂♂ 2.13–2.34 (2.22 ± 0.06, n=10), ♀♀ 2.05–2.18 (2.14 ± 0.05, n=5); rim of anterior margin as wide as 2–3 eye facets, interrupted in middle; anterior angles strongly deflexed, prominent; lateral pronotal sides weakly rounded; surface smooth, with rather deeply impressed, round punctures. Prosternal process with lateral edges straight, posterior edge rounded; lateral portions slightly raised, without setal clusters; median keel arcuate. Scutellum smooth, with small round punctures. Median part of metaventrite without plastron posteriorly widened, slightly convex; groups of long setae on metaventrite absent in both sexes. Elytra obovate, strongly convex, widest before middle, EL/EW: ♂♂ 1.40–1.45 (1.42± 0.02, n=10); ♀♀ 1.39–1.52 (1.44± 0.05, n=5); surface finely microreticulate, with scattered round punctures, striae absent. Tibiae slightly curved; protibia ca 1.4× as long as protarsus, PrTL/PL: ♂♂ 1.15–1.34 (1.23± 0.05, n =10), ♀♀ 0.90–1.14 (1.05± 0.09, n= 5). Terminal protarsomere as long as three preceding segments combined.

Ventrites covered with plastron, except on narrow portion along posterior margin of ventrite 5 in females. In males, ventrite 5 with very long setae on large oval area protruding beyond posterior margin of ventrite; in females with short longitudinal keel before apex. Aedeagus ( Fig. 105 ): phallobase slightly expanded proximally, PhL/PrL: 1.00–1.24 (1.14± 0.07, n=7); parameres long, strongly curved ventrad, apices acute (lateral aspect); penis with apex pointed in ventral aspect and narrowly rounded in lateral aspect; sclerotised fibula present. Bursa copulatrix with numerous small microsclerites scaterred in proximal and distal parts ( Fig. 106E ).

Secondary sexual dimorphism

Ventrite 5 in males with group of very long setae; in females with short longitudinal keel.

Distribution

China (Fujian, Guangdong) ( Fig. 116 ).

Figures

Fig. 104. Elmomorphus comosiclunis sp. nov., paratype, male from Fujian Province (NMW), TL: 3.69 mm.

Fig. 105. Elmomorphus comosiclunis sp. nov., paratype from Fujian Province (NMW), aedeagus. A. Lateral aspect. B. Ventral aspect. Scale bar: 0.1 mm.

Fig. 106. Bursa copulatrix and vagina. A. Elmomorphus hamatus sp. nov., paratype from type locality (NMW). B. E. oblongus sp. nov., paratype from type locality (NMW). C. E. glabriclunis sp. nov., paratype from China, locality CWBS 258 (CKB). D. E. simplex sp. nov., paratype from type locality (CKB). E. E. comosiclunis sp. nov., paratype from China, locality CWBS 468. Scale bar: 0.1 mm.

Fig. 116. Distribution map of Elmomorphus comosiclunis sp. nov.