Elmomorphus fusiformis, 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 : 47-51

Elmomorphus fusiformis sp. nov.

urn:lsid:zoobank.org:act:A6F346BC-BEFE-4F95-A988-F025DCDAFF50

Figs 19–20 , 109A

Differential diagnosis

Elmomorphus fusiformis sp. nov. ( Fig. 19 ) is a remarkably large species (TL ♂♂ 3.86–4.13 mm, ♀♀ 3.95–4.29 mm). It can be characterised by the presence of the dorsal plastron on the entire cranial surface (except for a narrow median area on the vertex), the anterior angles of the pronotum and the lateral sides of the elytra. Large elytral punctures are arranged in nine longitudinal rows on each elytron. Elmomorphus fusiformis resembles E. catenatus sp. nov., which differs in lacking an elytral plastron and in the strial punctures being well delimited and separated in E catenatus versus weakly delimited and confluent in E. fusiformis .

Etymology

The epithet is a Latin adjective in the nominative singular meaning spindle-shaped, referring to the oblong-ovate and strongly convex body shape.

Type material

Holotype

CHINA – Yunnan Province • ♂; “CHINA: NW-Yunnan 15km N Lijiang 2800m, 6.7.1994 leg. JI (16)”; IAECAS.

Paratypes

CHINA – Yunnan Province • 9 ♂♂, 13 ♀♀; same collection data as for holotype, but some specimens “leg. H. Schillhammer ”; CKB, NMW • 1 ♀; “ China Yunnan, 1800m LIJIANG 23.6.-21.7. 26.53N 100.18E lgt. S.Becvar 1992 ”; NMW • 20 ex.; “ CHINA: Yunnan Province, SHANZHI env., 22.-24. VI.2007, JIZU SHAN Mt., Zhusheng Si Monastery , 25°57.7′N 100°23.6′E, 2180 m, J. Hájek & J. Růžička leg. | individually, under stones, on vegetation, in stream; mixed forest (with dominant Pinus, Quercus, and Rhododendron )”; NMPC .

Type locality

China, Yunnan Province, Lijiang Autonomous Pref., Lijiang County, 15 km north of Lijiang City; small valley near the abandoned airport, small stream, 0.5–1.0 m wide, limestone, 2800 m a.s.l. (CWBS 60; Jäch & Ji 1995).

Description

Measurements (mm): TL: ♂♂ 3.86–4.13 (4.00 ±0.11, n =7), ♀♀ 3.95–4.29 (4.17 ± 0.14, n=5); PL: ♂♂ 0.94–1.04 (0.99 ± 0.04, n= 7), ♀♀ 0.96–1.04 (0.99 ±0.03, n=5); PW: ♂♂ 1.46–1.67 (1.58± 0.09, n= 7), ♀♀ 1.62–1.64 (1.63± 0.01, n =5); EL: ♂♂ 2.92–3.09 (3.01± 0.07, n =7), ♀♀ 2.99–3.25 (3.17 ± 0.11, n=5); EW: ♂♂ 1.82–2.01 (1.93± 0.07, =7), ♀♀ 1.92–2.05 (1.99 ± 0.05, n=5); PhL: 0.81– 0.88 (0.85± 0.03, n =7); PrL: 0.37–0.42 (0.39 ±0.02, n =7).

Body oblong-ovate, strongly convex dorsally ( Fig. 19 ). Integument black; mouthparts, antennae and tarsi reddish-brown. Pubescence consisting of short decumbent yellowish setae. Dorsal plastron present on cranial surface except for small narrow median area on vertex, on anterior angles of pronotum, and in lateral parts of elytra. Ventral plastron absent on prosternal process, median part of metaventrite, and median part of ventrite 1.

Cranial surface with round setiferous punctures, slightly smaller than an eye facet, separated by 0.5– 1.0 puncture diameter. Labrum transverse, anterior margin slightly emarginate; anterolateral angles rounded; exposed portion microreticulate, with minute round setiferous punctures. Anterior margin of clypeus slightly concave. Eyes oval, interfacetal setae short; ID: ♂♂ 0.53–0.60 mm (0.57 ± 0.03, n= 7), ♀♀ 0.56–0.63 mm (0.61 ± 0.03, n=5); APD/ID: ♂♂ 1.70–1.75 (1.72± 0.02, n=7), ♀♀ 1.66–1.80 (1.72 ± 0.05, n=5). Antennae 11-segmented. Terminal maxillary palpomere fusiform.

Pronotum transverse, widest at base, PW/PL: ♂♂ 1.55–1.64 (1.60± 0.03, n= 7), ♀♀ 1.56–1.69 (1.63± 0.01, n=5); surface smooth, large microgranules and coarse setiferous punctures confluent medially; plastron confined to anterior angles. Anterior rim twice as wide as eye facet, interrupted in middle; lateral sides convergent, rounded; anterior angles produced, acute. Prosternal process slightly wider than long; lateral and posterior edges rounded; lateral margins raised, without groups of long setae; median keel moderately raised. Scutellum as long as wide, microreticulate distally, with small round punctures. Metaventral disc flat, without groups of long setae; lateral rims of metaventral process flat. Elytra elongate oval, dorsally convex, widest behind middle, EL/EW: ♂♂ 1.53–1.61 (1.56± 0.03, n= 7), ♀♀ 1.56–1.63 (1.59 ± 0.03, n=5). Surface weakly microreticulate, small punctures scattered over entire surface, large deep punctures forming nine longitudinal striae, strial punctures separated by about half a puncture diameter. Plastron in two lateral bands, each reaching third stria. Tibiae weakly curved; protibia ca 1.22 × as long as protarsus; PrTL/PL: ♂♂ 1.01–1.09 (1.06 ±0.03, n=7), ♀♀ 1.03–1.10 (1.06 ± 0.06, n=5). Terminal protarsomere as long as three preceding segments combined.

Ventrites covered with plastron, except for median portion of ventrite 1. Ventrite 5 in males triangularly emarginate at apex; in females rounded, with small glabrous longitudinal keel. Aedeagus ( Fig. 20 ): phallobase rather long and slender, basal opening large, PhL/PrL: 2.00–2.30 (2.17± 0.11, n= 7). Parameres moderately curved ventrad, apices rounded in lateral aspect, obliquely truncated in ventral aspect. Penis rounded at apex, sclerotised fibula distinct. Ovipositor: valvifers long, flattened; coxites asymmetrical, right one ca 1.30× as long as left one. Bursa copulatrix without microsclerites.

Secondary sexual dimorphism

Ventrite 5 apically emarginate in males, rounded and with short apical keel in females.

Distribution

China (Yunnan) ( Fig. 109A ).

Figures

Fig. 19. Elmomorphus fusiformis sp. nov., holotype, male (IAECAS), TL: 4.17 mm.

Fig. 20. Elmomorphus fusiformis sp. nov., paratype from type locality (CKB), aedeagus. A. Lateral aspect. B. Ventral aspect. Scale bar: 0.1 mm.

Fig. 109. Distribution maps. A. Elmomorphus fusiformis sp. nov. B. E. elmoides sp. nov. C. E. calvus sp. nov. D. E. hongkong sp. nov. E. E. depressus sp. nov. F. E. sulcatus Kodada, Selnekovič & Jäch sp. nov.