Elmomorphus simplex, 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 : 207-211

Elmomorphus simplex sp. nov.

urn:lsid:zoobank.org:act:5DA24AA2-9325-4F75-93A2-E62BE5D6F533

Figs 102–103 , 106D , 115F

Differential diagnosis

Elmomorphus simplex sp. nov. ( Fig. 102 ) is characterised by a strongly convex body; the dorsal plastron is confined to small areas around the antennal insertions; the elytral punctation is uniform, and striae are missing. The entire ventrite 1 is covered with plastron; ventrite 5 is evenly convex in both sexes, and the plastron is absent only in a narrow area along the posterior margin. The species resembles E. glabriclunis sp. nov. and E. comosiclunis sp. nov.; the former differs in ventrite 5, which is strongly convex anteriorly and deflexed posteriorly, and the plastron is absent on a sizeable median area. Elmomorphus comosiclunis differs in the simple female ventrite 5 with a narrow posterior area without plastron, and the male ventrite 5 bearing a large flat oval area with remarkably long setae.

Etymology

The epithet ‘simplex’ (‘simple’) is a Latin adjective and refers to the simple elytral surface lacking striae and plastron.

Type material

Holotype

CHINA – Jiangxi Province • ♂; “CHINA, Jangxi [Jiangxi] W Jinggang Shan ( Ciping ), 2. - 14. VI. 1994 ”; NMW.

Paratypes

CHINA – Jiangxi Province • 4 ♂♂, 2 ♀♀; same collection data as for holotype; CKB, NMW • 6 ♂♂, 3 ♀♀; “ CHINA: Jiangxi, Jiuling Shan 18km NW Shangfu , 12.11.1997 env. Jiu Xian , 700-800m leg. Schönmann (CWBS 302)”; CKB, NMW • 1 ♂, 1 ♀; “ CHINA: Jiangxi, Jiuling Shan 8km NW Shangfu 13. 11. 1997 env. Shang Bao , 700m leg. M. Wang (CWBS 304)”; NMW • 2 ♂♂, 3 ♀♀; “ CHINA: Jiangxi, Jiuling Shan 35km W Shangfu 14.11.1997 env. Dong Xi Ling , 800m leg. Schönmann (CWBS 305)”; NMW • 4 ♂♂, 6 ♀♀; “ CHINA: Jiangxi, Jiuling Shan 18km NW Shangfu 15.11.1997 env. Jiu Xian , 800m leg. M. Wang (CWBS 306)”; CKB, NMW • 1 ♂; “ CHINA: JIANGXI Prov., 26.iv.2011 Jinggang Shan Mts. HUYANGTA (fen, stream) 26°29.9′N, 114°07.3′E, 1490 m M. Fikáček & J. Hájek leg.”; NMPC • 1 ex.; “ CHINA, JIANGXI prov., 23-29.iv.2011 Jinggang Shan Mts. BAIYINHU vill. env. (stream valley; wet rock; at light) 26°36.8′N, 114°11.1′E, 800 m M. Fikáček & J. Hájek leg.”; NMPC. – Fujian Province • 2 ♀♀; “ CHINA: FUJIAN Prov. Wuyishan Mts NNR, Guadun vill. env., J. Hájek, D. Král, J. Růžička & L. Sekerka leg., 25.+ 29.v.2018 | 1075–1250 m 27°44.0–2′N, 117°38.3–7′E tea plantation-mixed forest + bamboo”; NMPC • 1 ♀; “ CHINA: FUJIAN Prov. 25.v.2018 Wuyishan Mts NNR, Guadun vill. env., mixed forest + bamboo; wet rock along road 27°44.0′N, 117°38.7′E, 1075 m J. Hájek, D. Král, J. Růžička & L. Sekerka lgt.”; NMPC. – Hunan Province • 17 ♂♂, 7 ♀♀; “ CHINA, NW-Hunan 1993, Wulingyuan , N Dayong Zangjiajie [ Zhangjiajie ], 29.10., 650m, leg. L. JI (1) [CWBS 20]”; CKB, NMW • 8 ♂♂, 4 ♀♀; “ CHINA, NW-Hunan 1993 Wulingyuan , N Dayong Zangjiajie [ Zhangjiajie ], 29. 10. | 650m, leg. Schönmann et Schillhammer (2) [CWBS 21]”; CKB, NMW • 1 ♂; “ CHINA, NW-Hunan 1993 Wulingyuan , N Dayong Suoxiyu , 31.10., 400m leg. L. Ji (5) [CWBS 24]”; NMW • 1 ♀; “ CHINA, NW-Hunan 1993 Wulingyuan , N Dayong Suoxiyu , 31.10., 400m leg. Schönmann (6) [CWBS 25]”; NMW • 1 ex.; “ CHINA: Hunan, 19.3.2003 ca. 25 km N Pingjiang City 113°37′26″E 28°50′52″N ca. 200 m, leg. Schönmann, Komarek & Wang (CWBS 498)”; NMW • 1 ex.; “ CHINA: Hunan, 20.3.2003 ca. 25 km N Pingjiang City 113°38′05″E 28°50′10″N ca. 200 m, leg. Schönmann, Komarek & Wang (CWBS 499)”; NMW • 9 ex.; “ CHINA: Hunan, 21.3.2003 NE Nanjiangqiao, Mufu Shan 113°48′03″E 28°57′17″N ca. 600 m, leg. Schönmann, Komarek & Wang (CWBS 503)”; CKB, NMW • 10 ex.; “ CHINA: Hunan, 21.3.2003 NE Nanjiangqiao, Mufu Shan 113°48′03″E 28°57′17″N \ ca. 600 m, leg. Schönmann, \ Komarek & Wang (CWBS 504)”; NMW. – Zhejiang Province • 1 ex.; “ CHINA: Zhejiang Prov. Lishui City Reg. , 5.4.2001 1 km W Yunfeng vill., 950 m ǀ leg. M. Wang (CWBS 419)”; NMW • 3 ex.; “ CHINA: Zhejiang Prov. Lishui City Reg. , 6.4.2001 ǀ 1 km N Huangyuan vill., 1150 m leg. M. Wang (CWBS 420)”; NMW • 6 ex.; “ CHINA: Zhejiang Prov. ǀ Lishui City Reg. , 6.4.2001 2 km S Huangyuan vill., 1100 m leg. M. Wang (CWBS 421)”; NMW • 4 ex.; “ CHINA: Zhejiang Prov. ǀ Lishui City Reg., 7.4.2001 rd. Yunhe-Yunfeng , 1000 m leg. M. Wang (CWBS 422)”; NMW • 2 ex.; “ CHINA: Zhejiang Prov. ǀ Lishui City Reg. , 10.4.2001 40 km S Longquan , 900 m leg. M. Wang (CWBS 427)”; NMW • 1 ex.; “ CHINA: Zhejiang Prov. ǀ Lishui City Reg. , 11.4.2001 26 km S Longquan , 500 m leg. M. Wang (CWBS 430)”; NMW .

Type locality

China, Jiangxi Province, Jinggang Shan.

Description

Measurements (mm): TL: ♂♂ 3.36–3.89 (3.57 ± 0.12, n =15), ♀♀ 3.24–3.96 (3.70 ± 0.20, n=15); PL: ♂♂ 0.73–0.86 (0.81± 0.03, n =15), ♀♀ 0.74–0.87 (0.82 ± 0.04, n=15); PW: ♂♂ 1.50–1.73 (1.63± 0.05, n =15), ♀♀ 1.50–1.77 (1.67 ±0.08, n =15); EL: ♂♂ 2.57–3.02 (2.76± 0.12, n =15), ♀♀ 2.50–3.12 (2.88 ± 0.16, n=15); EW: ♂♂ 1.82–2.11 (1.95± 0.07, n= 15); ♀♀ 1.79–2.13 (1.99± 0.10, n= 15); PhL: 0.52–0.65 (0.55 ± 0.03, n=15); PrL: 0.32–0.38 (0.35 ± 0.02, n=15).

Body broadly oval, strongly convex dorsally ( Fig. 102 ). Integument black; mouthparts, antennae, trochanters, and tarsi reddish brown. Pubescence consisting of short yellowish setae. Plastron covering small anterolateral areas of frontoclypeus around antennal insertions and ventral surface, except for prosternal process and median part of metaventrite.

Head with small round punctures with diameters slightly smaller than eye facet, separated by ca 0.5– 1.0× puncture diameter; microreticulation very fine, confined to anterior portion; plastron around antennal insertions only. Anterior margin of labrum shallowly emarginate in middle; exposed portion microreticulate, with small setiferous punctures; setae of equal length in both sexes. Anterior margin of clypeus straight. Antennae 11-segmented. Eyes oval, interfacetal setae short, ID: ♂♂ 0.49–0.56 mm (0.52 ± 0.02, n=15), ♀♀ 0.51–0.57 mm (0.55 ±0.02, n=15), APD/ID: ♂♂ 1.64–1.92 (1.78± 0.06, n= 15), ♀♀ 1.62–1.81 (1.74 ± 0.06). Mandibles with four teeth; mola well developed, setose; prostheca curved mesally in apical fourth, with numerous long sensilla along medial margin and short conical sensilla apically.

Pronotum moderately convex; PW/PL: ♂♂ 1.89–2.26 (2.02± 0.09, n=15), ♀♀ 1.95–2.13 (2.05 ± 0.05, n= 15); surface smooth, with round setiferous punctures; plastron absent; rim of anterior margin as wide as 3 × diameter of eye facet, interrupted in middle; lateral pronotal sides convergent, slightly rounded in dorsal aspect. Prosternal process with lateral edges divergent and straight, apical edge broadly rounded; lateral portions feebly raised without setal clusters; median keel arcuate. Scutellum as long as wide, surface smooth, with small punctures. Median part of metaventrite moderately convex and posteriorly widened; in both sexes, groups of long setae absent. Elytra oval, strongly convex, widest before middle, EL/EW: ♂♂ 1.33–1.49 (1.42 ±0.04, n= 15), ♀♀ 1.10–1.50 (1.42± 0.09, n =15); dorsal surface finely microreticulate, with round setiferous punctures; plastron missing. Tibiae slightly curved; protibia ca 1.3× as long as protarsus, PrTL/PL: ♂♂ 0.91–1.14 (1.00± 0.06, n =15), ♀♀ 0.95–1.04 (1.00± 0.02, n= 15). Terminal protarsomere as long as three preceding tarsomeres combined.

Ventrites covered with plastron, except for narrow area along apical margin of ventrite 5. In males, ventrite 5 narrowly truncate or slightly emarginate apically; in females rounded, with short longitudinal keel. Aedeagus ( Fig. 103 ): phallobase slightly expanded basally; PhL/PrL: 1.39–1.75 (1.55± 0.10, n= 15); parameres slightly curved ventrad, apices rounded (lateral aspect); penis apically narrowly rounded; sclerotised fibula long. Bursa copulatrix ( Fig. 106D ) with microsclerites scattered laterally in proximal portions.

Secondary sexual dimorphism

Females with short subapical longitudinal keel on last ventrite.

Distribution

China (Fujian, Hunan, Jiangxi, Zhejiang) ( Fig. 115F ).

Figures

Fig. 102. Elmomorphus simplex sp. nov., paratype, male from China, locality CWBS 20 (CKB), TL: 3.57 mm.

Fig. 103. Elmomorphus simplex sp. nov., paratype from China, locality CWBS 20 (CKB), 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. 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.