Elmomorphus superficialis, 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 : 192-195

Elmomorphus superficialis sp. nov.

urn:lsid:zoobank.org:act:EBA24DA5-4656-41E5-886E-9ED5F52CB0D0

Figs 94–95 , 115B

Differential diagnosis

Elmomorphus superficialis sp. nov. ( Fig. 94 ) is characterised by having the strongly convex body and by the dorsal plastron confined to small areas of the frontoclypeus (around antennal insertions). The elytron has small, scattered punctures and large punctures arranged in longitudinal rows. The head and pronotum are smooth, the elytra weakly microreticulate; microgranules are absent. This species resembles E. jii sp. nov., E. schoenmanni sp. nov., and E. vietnamensis sp. nov., but it differs from these in the absence of microreticulation on the head and pronotum; the elytral microreticulation is formed by irregular polygonal meshes; ventrite 1 is entirely covered with plastron and ventrite 5 lacks plastron on a narrow area along the posterior margin. In general appearance, E. superficialis closely resembles E. simplex sp. nov., E. glabriclunis sp. nov., and E. comosiclunis sp. nov., but it differs from these in the presence of distinct elytral striae.

Etymology

The epithet ‘superficialis’ (‘superficial’) is a Latin adjective in the nominative singular referring to the distinct, but weakly impressed, longitudinal rows of large elytral punctures.

Type material

Holotype

CHINA – Anhui Province • ♂; “CHINA: Anhui, Dabie Shan 20km N Yuexi , 6.11.1997 env.[ironment of] Shi Guan , 950-1000m leg. Schönmann (CWBS 297)”; IAECAS.

Paratypes

CHINA – Anhui Province • 18 ♂♂, 13 ♀♀; same collection data as for holotype, but some specimens “leg. Wang ”; CKB, NMW • 4 ♀♀; “ CHINA: Anhui, Dabie Shan 40km N Yuexi , 5.11.1997 env. Gui Xing Di , 800m leg. Schönmann (CWBS 295)”; NMW • 1 ex.; “ CHINA: Anhui, Dabie Shan 50km NW Yuexi , 7.11.1997 Huang Liyan / Baojia , 1050m leg. M. Wang (CWBS 298)”; NMW • 3 ♂♂, 1 ♀; “ CHINA: Anhui, Dabie Shan 50 km NW Yuexi , 8.11.1997 Huang Liyan / Baojia , 1050m leg. M. Wang (CWBS 299)”; CKB, NMW • 5 ♂♂, 6 ♀♀; “ CHINA: Anhui, Dabie Shan 25km N Yuexi 9.11.1997 env. Shi Guan , 1100m leg. M. Wang (CWBS 300)”; CKB, NMW • 5 ♂♂, 6 ♀♀; “ CHINA: Anhui, Dabie Shan 25km N Yuexi , 9.11.1997 env. Shi Guan , 1100m leg. Schönmann (CWBS 301)”; CKB, NMW. – Fujian Province • 1 ex.; “ CHINA: FUJIAN, Chong’an Wuyi Shan , 3 km W Da’an 500m, 19.1.1997 leg. Ji & Wang (CWBS 250)”; NMW • 1 ex.; “ CHINA: FUJIAN, Yong’an 5km N Xiyang , 400m 26.1.1997 leg. Ji & Wang (CWBS 258)”; NMW. – Jiangxi Province • 1 ex.; “ CHINA: Jiangxi, Jiuling Shan 35km W Shangfu , 14.11.1997 env. Dong Xi Ling , 800m leg. M. Wang (CWBS 305)”; NMW • 1 ex.; “ CHINA: Jiangxi, Jiuling Shan 18km NW Shangfu , 15.11.1997 env. Jiu Xian , 800m leg. M. Wang (CWBS 306)”; NMW .

Type locality

China, Anhui Province, Anqing Prefecture, Yuexi County, Dabie Shan, near Shi Guan, ca 20 km north of Yuexi City; stream, ca 0.5–1.0 m wide, surrounded by dense bushes and Cunninghamia forest, completely shaded, small waterfalls, sections with gravel, decaying leaves, 950–1000 m a.s.l. (CWBS 297; Jäch & Ji 1998).

Description

Measurements (mm): TL: ♂♂ 3.21–3.52 (3.36 ± 0.10, n =13), ♀♀ 3.24–3.75 (3.49 ± 0.14, n=13); PL: ♂♂ 0.67–0.81 (0.74 ± 0.04, n =13), ♀♀ 0.71–0.79 (0.76± 0.02, n=13); PW: ♂♂ 1.50–1.65 (1.59 ± 0.05, n =13), ♀♀ 1.50–1.73 (1.65 ±0.07, n =13); EL: ♂♂ 2.50–2.73 (2.62± 0.07, n =13), ♀♀ 2.54–2.96 (2.74 ±0.12, n=13); EW: ♂♂ 1.82–2.02 (1.93± 0.07, n= 13), ♀♀ 1.82–2.15 (2.01± 0.08, n= 13); PhL: 0.47–0.59 (0.53 ± 0.05, n=13); PrL: 0.32–0.37 (0.35 ± 0.01, n=13).

Body broadly oval, strongly convex dorsally ( Fig. 94 ). Integument black; mouth parts, antennae, and legs reddish-brown. Pubescence consisting of short thin yellowish setae. Dorsal plastron present only around antennal insertions; ventral plastron present on entire surface, except on prosternal process, median part of metaventrite, and along apical margin of ventrite 5.

Dorsal surface of head smooth with round setiferous punctures (diameter slightly smaller than an eye facet); punctures separated by 0.5–1.5× puncture diameter. Labrum emarginate anteriorly, exposed portion microreticulate; setae of equal length in both sexes. Eyes oval, interfacetal setae short. Antennae 10-segmented, densely setose.

Pronotum transverse, moderately convex, PW/PL: ♂♂ 2.03–2.25 (2.16± 0.06, n=13), ♀♀ 2.05–2.25 (2.17 ± 0.05, n=13); surface smooth, with round setiferous punctures; rim of anterior margin as wide as two eye facets, interrupted in middle; anterior angles strongly deflexed, prominent; lateral pronotal sides rounded. Prosternal process without groups of long setae. Scutellum slightly wider than long; surface smooth with round punctures. Median part of metaventrite widened posteriorly; groups of long setae absent in both sexes. Elytra oval, strongly convex, widest before middle, EL/EW: ♂♂ 1.31–1.41 (1.36 ± 0.03, n= 13), ♀♀ 1.33–1.40 (1.36± 0.02, n =13); surface smooth in anterior portions, very finely microreticulate in posterior portions; small punctures scattered over entire surface; large round punctures arranged in nine rather indistinct longitudinal rows, distance between punctures about half a diameter. Tibiae slightly curved; protibia ca 1.4× as long as protarsus, PrTL/PL: ♂♂ 0.96–1.17 (1.04± 0.05, n= 13), ♀♀ 0.97–1.11 (1.04± 0.04, n= 13). Terminal protarsomere as long as three preceding tarsomeres combined.

Ventrites covered with plastron, except on narrow, medially expanded area along posterior margin of ventrite 5. Ventrite 1 with two longitudinal keels medially. Ventrite 5 simple, convex, posterior margin rounded. Aedeagus ( Fig. 95 ): phallobase rather short, expanded proximally; PhL/PrL: 1.36–1.68 (1.52 ± 0.10, n =13); parameres evenly narrowed to apices, slightly curved ventrad, apices rounded (lateral aspect); penis apically narrowly rounded; sclerotised fibula long and slender.

Secondary sexual dimorphism

Ventrite 5 in females with short longitudinal subapical keel.

Distribution

China (Anhui, Fujian, Jiangxi) ( Fig. 115B ).

Figures

Fig. 94. Elmomorphus superficialis sp. nov., paratype, male from type locality (CKB), TL: 3.36 mm.

Fig. 95. Elmomorphus superficialis sp. nov., paratype from type locality (CKB), aedeagus. A. Lateral aspect. B. Ventral aspect. 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.