Elmomorphus paradonatus 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 : 135-140

Elmomorphus paradonatus Kodada, Selnekovič & Jäch sp. nov.

urn:lsid:zoobank.org:act:7A156AFC-F278-41A9-B972-F978A8243DB2

Figs 65–66 , 67D , 112F

Differential diagnosis

Elmomorphus paradonatus sp. nov. ( Fig. 65 ) belongs to the group of species with the dorsal plastron on anterior portions of the head and posterolateral portions of the elytra. Elytral punctures are scattered over the entire surface, striae absent. Males have conspicuous long and erect setae or setal clusters on the labrum, prosternal process and metaventrite. The disc of the metaventriteis strongly depressed in males.

Together with E. donatus sp. nov. and E. simplipes sp. nov., it can be recognised 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. 67D ). It differs from E. simplipes in the larger body size. It can be distinguished from E. donatus only by the absence of the large internal sclerite and the ventral sclerotised arch on the bursa copulatrix ( Fig. 67D ).

Etymology

The epithet refers to the morphological similarity of the species with E. donatus sp. nov.

Type material

Holotype

CHINA – Yunnan Province • ♀; “CHINA:Yünnan, Gejiu Pref. 15km S Gejiu , Tou Dao Shui 23.11.1999, ca. 1700m Schönmann & Wang (CWBS 399)”; IAECAS.

Paratypes

CHINA – Yunnan Province • 30 ♂♂, 22 ♀♀; same collection data as for holotype; CKB, NMW • 1 ♀; “ CHINA: Yünnan, Simao Pref. 25km SW Simao , Zhu Shan 17.11.1999, ca. 1000 m Schönmann & Wang (CWBS 392)”; NMW • 27 ♂♂, 23 ♀♀; “ CHINA: Yünnan, Gejiu Pref. 15km S Gejiu , Tou Dao Shui 24.11.1999, ca. 1700 m Schönmann & Wang (CWBS 404)”; CKB, NMW • 1 ♀; “ CHINA: Yünnan, Chuxiong Pref. 15 km W Lufang 27.11.1999, ca. 1500 m Schönmann & Wang (CWBS 408)”; NMW • 29 ♂♂, 28 ♀♀; “ CHINA: Yünnan, Chuxiong Pref. Da Shui Go riv. nr. Ban Jiu 10km N Yipinglang 27.11.1999, ca. 1700m Schönmann & Wang (CWBS 409)”; CKB, NMW • 1 ♂; “ CHINA: Guizhou, Leishan Co. SE Kaili , 15km E Lishan Leigong Shan , S - slope 26°22.40′N 108°08.83′E | 12.6.2001, ca. 1000m leg. Schillhammer & Wang (CWBS 431)”; NMW. – Guizhou Province • 1 ♀; “ CHINA: Guizhou, Leishan Co. SE Kaili, NE Leishan Leigong Shan , E - slope 26°26.11′N 108°16.08′E | Wunang river 13.6.2001 ca. 900m leg. Schillhammer & Wang (CWBS 432)”; NMW • 1 ♀; “ CHINA: Guizhou, Jiangkou Co. ca. 50 km SW Jiangkou Shidu vill. 27°32.71′N 108°36.30′E | right trib[utary] of Guanhe river 1./ 4.7.2001, 650 - 680 m leg. Schillhammer & Wang (CWBS 445)”; NMW .

Type locality

China, Yunnan Province, Gejiu Prefecture, Gejiu City, 15 km south of Gejiu, ca 1700 m a.s.l.; Tou Dao Shui (= Number One Water) stream, 50–100 cm wide, canalised, flowing through crop fields, pastures and pine forest, riparian vegetation dense, floating rootlets (CWBS 399; Jäch & Ji 2003).

Description

Measurements (mm): TL: ♂♂ 2.97–3.58 (3.24 ± 0.14, n =20), ♀♀ 3.14–3.79 (3.34 ± 0.14, n=20); PL: ♂♂ 0.69–0.81 (0.75± 0.03, n =20), ♀♀ 0.70–0.86 (0.76± 0.03, n=20); PW: ♂♂ 1.37–1.53 (1.47 ± 0.05, n =20), ♀♀ 1.42–1.64 (1.50± 0.05, n=20); EL: ♂♂ 2.27–2.76 (2.50 ±0.10, n =20); ♀♀ 2.44–2.92 (2.58 ± 0.11, n=20); EW: ♂♂ 1.62–1.87 (1.78± 0.06, n=20), ♀♀ 1.72–1.98 (1.83± 0.06, n= 20); PhL: 0.90–1.08 (1.00± 0.05, n=20); PrL: 0.54–0.67 (0.60 ± 0.03, n=20).

Body ( Fig. 65 ) ovate, strongly convex dorsally. Integument dark brown to black; mouthparts, antennae, trochanters, and tarsi reddish-brown. Pubescence consists of very short sparse yellowish setae. Plastron distributed on anterior portions of head, apicolateral portions of elytra, and on ventral surface except prosternal process, median part of metaventrite, and middle of ventrites 1–2.

Head with round setiferous punctures, each about as wide as one eye facet, separated by ca 0.5–1.0 × puncture diameter; surface between punctures smooth; plastron present on frontoclypeus. Labrum transverse, anterior margin slightly rounded, surface microreticulate, with densely arranged, setiferous punctures; males with conspicuous long and erect setae. Anterior margin of clypeus straight. Antennae 9-segmented. Eyes oval, interfacetal setae short; ID: ♂♂ 0.43–0.53 mm (0.47 mm ± 0.02, n=20), ♀♀ 0.45–0.54 mm (0.49 mm ± 0.02, n =20); APD/ID: ♂♂ 1.68–1.87 (1.78± 0.06, n=20), ♀♀ 1.64–2.04 (1.75± 0.08, n=20).

Pronotum wider than long, widest at base, PW/PL: ♂♂ 1.84–2.09 (1.97 ± 0.06, n= 20), ♀♀ 1.89– 2.08 (1.98 ±0.05, n=20); surface smooth, with round setiferous punctures; plastron absent; rim of anterior margin as wide as three eye facets; anterior angles strongly deflexed, prominent; lateral sides convergent, slightly rounded, sometimes very slightly concave near anterior angles. Prosternal process with lateral edge divergent, straight; posterior edge broadly V-shaped; lateral portions raised; males with clusters of long setae anteriorly; median keel slightly arcuate. Scutellum about as long as wide, smooth, with small round punctures. Metaventrite with median area without plastron posteriorly widened; in males depressed, with two groups of long setae; in females slightly convex, without long setae; lateral margins of metaventral process raised. Elytra broadly oval, widest close before middle, EL/EW: ♂♂ 1.31–1.49 (1.40± 0.04, n=20), ♀♀ 1.36–1.47 (1.41 ± 0.03, n=20); surface with fine microreticulation in form of polygonal meshes; round punctures scattered, striae absent; plastron present on apicolateral portions. Tibiae slender, slightly curved; protibia ca 1.3× as long as protarsus, PrTL/PL: ♂♂ 1.13– 1.25 (1.19± 0.03, n=20), ♀♀ 1.00–1.19 (1.10± 0.04, n=20). Terminal protarsomere as long as three preceding tarsomeres combined.

Abdomen covered with plastron except middle of ventrites 1–2. Ventrite 5 with short glabrous longitudinal keel before apex, and long setae alongside keel; apical margin in females with small triangular excision. Aedeagus ( Fig. 66 ): phallobase robust, expanded proximally, PhL/PrL: 1.47–1.94 (1.66± 0.09, n=20); parameres evenly narrowed to apices, curved ventrad, apices narrowly rounded (lateral aspect); penis expanded and rounded apically. Ovipositor: valvifers long and flattened; coxites asymmetrical, right one ca 1.30 × as long as left one. Proximal part of bursa copulatrix with sclerotised spines arranged in a distinct dorsal row, scattered over lateral portions ( Fig. 67D ); proximal part of bursa copulatrix with several sclerotised spines in ventral portions; spermatheca tubular; accessory gland large.

Secondary sexual dimorphism

Labrum, prosternal process, and metaventrite with groups of long setae in males. Median part of metaventrite depressed in males, convex in females. Apical margin of ventrite 5 with small excision in females.

Distribution

China (Guizhou, Yunnan) ( Fig. 112F ).

Figures

Fig. 65. Elmomorphus paradonatus sp. nov., paratype, male from China, locality CWBS 404 (CKB), TL: 3.24 mm.

Fig. 66. Elmomorphus paradonatus sp. nov., paratype from China, locality CWBS 404 (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.