Elmomorphus donatus Kodada, Selnekovič & Jäch, 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 : 131-135

Elmomorphus donatus Kodada, Selnekovič & Jäch sp. nov.

urn:lsid:zoobank.org:act:0591BA28-358C-4A1F-8D90-705A6EBAA20C

Figs 63–64 , 67B–C , 112E

Differential diagnosis

Elmomorphus donatus sp. nov. ( Fig. 63 ) belongs to a group of species characterised by having the dorsal plastron on the anterior portion of the head and on the posterolateral portions of the elytra. Elytral punctures are scattered over the entire surface, striae are absent. Males have conspicuous long erect setae or setal clusters on the labrum, prosternal process, and metaventrite. The disc of the metaventrite is strongly depressed in males. Together with E. paradonatus sp. nov. and E. simplipes sp. nov., it can be distinguished from E. curvipes sp. nov., E. dentipes sp. nov., and E. similis sp. nov. by the absence of male metatibial teeth and by the different arrangement of spines on the bursa copulatrix ( Fig. 67B–C ). From E. simplipes it can be separated by the larger body size (TL in E. simplipes : ♂♂ 2.59–2.97 mm (2.81 ± 0.09, n=25), ♀♀ 2.91–3.19 mm (3.01 ±0.08, n=20), in E. donatus : ♂♂ 3.09– 3.50 mm (3.30 ± 0.10, n =20), ♀♀ 3.35–3.66 mm (3.51± 0.09, n= 19)) and differences in the bursa copulatrix ( Fig. 67B–C ). From E. paradonatus it can be distinguished only by the presence of the large internal sclerite and the ventral sclerotised arch of the bursa ( Fig. 67B–C ).

Etymology

The epithet is a Latin adjective meaning ‘donated’, commemorating the first Chinese specimens which were donated to J. Kodada by O. Šauša and E. Jendek in 1993.

Type material

Holotype

VIETNAM – Vinh Phúc Province • ♂; “N-VIETNAM: Tam Dao (2) 1.- 8.6.1996 leg. Dembicky & Pacholatko ”; NMW.

Paratypes

CHINA – Yunnan Province • 5 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 • 3 ♂♂, 13 ♀♀; “ CH, Yunnan 14.-21.6.[19]93 100km W of Baoshan GAOLIGONGSHAN nat. res. E.Jendek, O.Šauša leg.”; CKB, NMW • 1 ♀; “ CHINA: YUNNAN PROV: Lushui Co., Gaoligong Mts., Luisahe vill ., Hájek, Hrůzová, Král, Růžička & Sommer lgt. 10.vii.2019 | river valley, mixed forest on vegetation; in dead wood and fungi; 25°58.3–7′N, 98°44.4–45.3′E, 2135- 2450 m ”; NMPC. – Jiangxi Province • 1 ♂, 2 ♀♀; “ CHINA, JIANGXI Prov., 24.iv.2011 Jianggang Shan Mts. XIPING (stream valley, cow dungs) 26°33.7′N, 114°12.22′E, 915 m M. Fikáček & J. Hájek leg.”; NMPC .

VIETNAM – Vinh Phúc Province • 133 ♂♂, 155 ♀♀; same collection data as for holotype; CKB, NMW .

Type locality

Vietnam, Vinh Phúc Province, Tam Dao.

Description

Measurements (mm): TL: ♂♂ 3.09–3.50 (3.30 ± 0.10, n =20), ♀♀ 3.35–3.66 (3.51± 0.09, n=19); PL: ♂♂ 0.72–0.81 (0.75± 0.03, n =20), ♀♀ 0.75–0.85 (0.79± 0.03, n=20); PW: ♂♂ 1.46–1.61 (1.51 ± 0.04, n =20), ♀♀ 1.50–1.72 (1.59 ±0.06, n =19); EL: ♂♂ 2.37–2.73 (2.54± 0.08, n =20), ♀♀ 2.58–2.83 (2.72 ±0.07, n=19); EW: ♂♂ 1.74–1.92 (1.81 ± 0.05, n= 20), ♀♀ 1.75–2.01 (1.91 ± 0.06, n= 19); PhL: 0.96–1.11 (1.04 ± 0.04, n=19); PrL: 0.56–0.70 (0.61 ±0.03, n =19).

Body ( Fig. 63 ) oval, widest close before middle of elytra, strongly convex dorsally. Integument dark brown to black; mouthparts, antennae, trochanters, and tarsi reddish-brown. Pubescence consists of very short, sparse yellowish setae. Plastron covering anterior portions of head, apicolateral portions of elytra, and ventral surface except for prosternal process, metaventral disc and middle of ventrites 1–2.

Head with round setiferous punctures, smaller than an eye facet, separated by 1–2 × puncture diameters; surface between punctures smooth; plastron present on frontoclypeus. Labrum transverse, anterior margin slightly rounded, exposed portion microreticulate, with small dense setiferous punctures; males with conspicuous long and erect setae. Anterior margin of clypeus straight. Antennae 9-segmented. Eyes oval, interfacetal setae short; ID: ♂♂ 0.46–0.55 mm (0.51 mm ±0.02, n=20), ♀♀ 0.50–0.57 mm (0.53 mm ± 0.02, n= 19); APD/ID: ♂♂ 1.60–1.78 (1.68± 0.05, n=20), ♀♀ 1.62–1.76 (1.70± 0.04, n= 19).

Pronotum wider than long, widest at base; PW/PL: ♂♂ 1.89–2.14 (2.01± 0.05, n=20), ♀♀ 1.88–2.13 (2.01 ± 0.05, n =19); surface smooth, with round setiferous punctures; plastron absent; rim of anterior margin as wide as three eye facets; anterior angles strongly deflexed, prominent; lateral pronotal sides convergent, slightly rounded posteriorly, sometimes slightly concave before anterior angles. Prosternal process with lateral edges divergent, straight, apical edge broadly V-shaped; lateral portions raised, in males with conspicuous clusters of long setae anteriorly; median keel flat. Scutellum longer than wide, smooth, with round punctures. Disc of metaventrite depressed in males, with two clusters of long setae; in females flat to convex, without longer setae; lateral margins of metaventral process raised, distinctly separated by ridge. Elytra broadly oval, widest close before middle, EL/EW: 1.34–1.46 (1.40± 0.03, n= 20), ♀♀ 1.37–1.54 (1.43± 0.04, n=19); surface with scattered round punctures; microreticulation fine, formed by polygonal meshes; plastron present on epipleura and on apicolateral portions. Tibiae slender, slightly curved; protibia ca 1.4 × as long as protarsus, PrTL/PL: ♂♂ 1.07–1.26 (1.20± 0.05, n= 20), ♀♀ 1.00–1.14 (1.07± 0.04, n=19). Terminal protarsomere as long as three preceding tarsomeres combined.

Ventrites covered with plastron, except middle of ventrites 1–2. Apical margin of ventrite 5 in males truncate or shallowly triangularly excised; in females rounded, with very small, triangular excision in middle; both sexes with short glabrous longitudinal subapical keel. Aedeagus ( Fig. 64 ): phallobase slightly expanded proximally, PhL/PrL: 1.47–1.87 (1.72 ± 0.10, n=19); parameres evenly narrowed to apices, curved ventrad, apices narrowly rounded (lateral aspect); penis narrowly rounded apically in dorsal aspect, slightly expanded and rounded in lateral aspect; sclerotised fibula relatively wide. Ovipositor: valvifers long and flattened; coxites asymmetrical, right one ca 1.30 × as long as left one. Proximal part of bursa copulatrix ( Fig. 67B–C ) with large internal sclerite, sclerotised spines arranged in distinct dorsal row and scattered in two small ventro-lateral groups; distal part of bursa copulatrix ventrally with semicircular strip formed by minute microsclerites; spermatheca tubular with large accessory gland.

Secondary sexual dimorphism

Males with long setae on labrum, lateral portions of prosternal process, and median part of metaventrite. Median part of metaventrite depressed in males, flat to convex in females. Apex of ventrite 5 in females with minimal excision.

Distribution

China (Jiangxi, Yunnan), Vietnam ( Fig. 112E ).

Figures

Fig. 63. Elmomorphus donatus Kodada, Selnekovič & Jäch sp. nov., paratype, male from type locality (CKB), TL: 3.30 mm.

Fig. 64. Elmomorphus donatus Kodada, Selnekovič & Jäch sp. nov., paratype from type locality (CKB), aedeagus. A. Lateral aspect. B. Ventral aspect. Scale bar: 0.1 mm.

Fig. 67. Bursa copulatrix and vagina. A. Elmomorphus simplipes sp. nov., paratype from type locality (CKB).B. E. donatus Kodada, Selnekovič & Jäch sp. nov., holotype (NMW), lateral aspect. C. E. donatus, holotype (NMW), ventral aspect. D. E. paradonatus sp. nov., holotype (IAECAS). Scale bar: 0.1 mm.

Fig. 112. Distribution maps. A. Elmomorphus bispinosus sp. nov. B. E. nepalensis Satô, 1981. C. E. punctulatus sp. nov. D. E. simplipes sp. nov. E. E. donatus Kodada, Selnekovič & Jäch sp. nov. F. E. paradonatus sp. nov.