Grouvellinus lihaitaoi Jiang, Wu & Chen, 2024, sp. nov.
Creators: name: Jiang, Ri-Xin
name: Wu, Ping-Lan
name: Chen, Xiang-Sheng
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Elmidae
Grouvellinus
Grouvellinus lihaitaoi

description: Grouvellinus lihaitaoi sp. nov.
Figs 1 D, 8, 9, 12 D, I
Material examined.
(82 exs: 19 ♂♂, 13 ♀♀: 50 exs., sex undetermined): Holotype: China • ♂, labeled ‘ China: Guizhou, Qiannan Buyi and Miao Autonomous Prefecture (黔南布依族苗族自治州), Longli (龙里县), Wantanhe Town (湾滩河镇), H: 1136.10 ± 1.08 m, 26°12'52"N, 106°59'27"E, 31. VIII. 2023, Jiang Ri-Xin, Hai-Tao Li, Pin Li, Yu-Hao Zhang, Yin-Lin Mu & Xiu-Dong Huang leg. ’ (GUGC). Paratypes: China • 18 ♂♂, 13 ♀♀, 50 exs., sex undetermined, with same label data as the holotype (GUGC).
Diagnosis.
Body elongate-oval, dark brown, shiny, with weak cupreous metallic luster. Pronotum widest at base, disc covered with dense small round punctures, surface of posterior angles granulated, middle of base a pair of small round foveae. Elytral interval VIII carinated, carina granulated. Median sulcus of metaventrite thin but distinct, extending from base to 1 / 2 length of mataventrite. Aedeagus with median lobe distinctly longer than parameres, base distinctly narrowed, apex narrowed, subacute. Parameres wide, apex rounded, outer sides weakly sinuate, lateral portion with long setae at apical 1 / 6.
Description.
Male. Body long-oval (Fig. 1 D), head, pronotum and femora dark brown, elytra, tibiae, and antennae reddish brown, surface shiny with cupreous metallic luster. Plastron area confined to head, except for frons, vertex, and clypeus, lateral portions of prosternum, ninth elytral interval and epipleura, lateral portions of mesosternum, metaventrite, abdomen, and surfaces of femora.
Head (Fig. 8 A) wider than long, dorsal surface shiny, densely covered with short setae (except discal part) and sparse large punctures, each puncture bearing a longer seta. Clypeus with surface shiny, densely covered with short setae (except disc) and sparse long setae. Labrum transverse, narrower than clypeus, surface shiny, basal 1 / 2 hairless, apical 1 / 2 with sparse short setae, lateral margins with long bristles, apical margin rounded.
Pronotum (Fig. 8 B), slightly wider than long, widest at base, narrowed anteriad. Surface shiny, disc densely punctured, and with punctures in different length, intervals glabrous, shiny; longitudinal impression absent, with a pair of small round foveae located at median of base; surface of posterior angles distinctly granulated. Anterior margin arcuate, anterior angles produced and weakly acutangular with subacute apex; pronotal margins finely curved. Basal margin trisinuate, posterior angles acutangular. Sublateral carinae distinct, extending from base to ~ 2 / 5 length of pronotum, each side of sublateral carinae with a shallow and indistinct oblique impression, extending from apex of sublateral carinae to near anterior angle. Prosternal process (Fig. 8 D) with apex rounded, surface distinctly wrinkled and sparsely covered with large punctures and long setae.
Scutellum (Fig. 8 B) widely triangular, approximately as long as wide, widest at basal 1 / 3; surface weakly wrinkled, sparsely covered with large punctures, each bearing a long seta. Lateral margins finely curved, apex obtuse.
Elytra (Fig. 8 C) ~ 1.5 × as long as wide, widest near apical 1 / 3. Surface shiny, with sparse long setae. Lateral margins sub-parallel in basal 2 / 3. Strial punctures larger in basal 2 / 3, separated by more than twice diameter, and much smaller and widely separated in other portions of elytra. Granulated carina on interval VIII, other intervals flat. Hind wings well developed.
Metaventrite (Fig. 8 D), surface rough and finely with long setae and large round punctures at disc. Median sulcus distinct, extending from posterior margin to 1 / 2 length of metaventrite, base with a pair of round impression. Lateral sides of disc with series of elliptical shallow impression.
Abdomen.
Base of ventrite I (Fig. 8 D) weakly wrinkled, middle regions of ventrites I – IV and anterior part of ventrite V (Fig. 8 D) finely with large round punctures, each puncture bearing a long seta. Other parts of abdomen (Fig. 8 D) covered with plastron and mixed with sparse long setae. Apex of ventrite V weakly curved, ventrite I with well-developed pair of admedian carinae, curved at middle, extending from base to apex.
Legs simple, surface granulated; femora widened, surface with plastron; inner side of tibiae with cleaning fringes; tarsi slightly shorter tibiae; tarsal claws simple.
Genitalia.
Aedeagus (Fig. 9 A – D), long and slender, symmetrical; median lobe distinctly longer than parameres, widest at basal 2 / 5, apical 3 / 5 finely narrowed, with apex rounded. Parameres (Fig. 9 D) wide, nearly straight, with apex rounded; apical 1 / 6 covered with long setae.
Female. Externally similar to the male, averagely larger. Ovipositor as in Fig. 12 D, I. Stylus short and narrow, weakly curved near middle, ~ 1 / 4 as long as distal portion of coxite. Coxite long, with apex expanded, roundly broadened at outer margin, with several short and curved sensilla. Distal portion of coxite nearly straight, surface finely covered with very short and acute setae. Proximal portion of coxite short, longer than 1 / 2 the length of distal portion, surface finely covered with very short and acute setae. Valvifers slightly longer than coxite, longitudinal baculum weakly curved.
Measurements.
Male (n = 10): CL: 1.77–2.13 mm (1.88 ± 0.10); PL: 0.49–0.61 mm (0.55 ± 0.04), PW: 0.61–0.77 mm (0.69 ± 0.05); EL: 1.28–1.51 mm (1.38 ± 0.06), EW: 0.78–0.98 mm (0.87 ± 0.06).
Female: CL (n = 10): 1.87–1.99 mm (1.93 ± 0.05); PL: 0.52–0.54 mm (0.53 ± 0.01), PW: 0.64–0.67 mm (0.65 ± 0.01); EL: 1.27–1.44 mm (1.38 ± 0.06), EW: 0.84–0.92 mm (0.88 ± 0.03).
Distribution.
China: Guizhou.
Biology.
All adults were collected from submerged stone in small ravine stream (Fig. 15 C – E).
Etymology.
The species epithet honors our friend and colleague Dr. Hai-Tao Li (Guizhou University), one of the collectors of the new species; the name is treated as an adjective.
Comparative diagnosis.
The new species is most similar to Grouvellinus muyinlini sp. nov. It can be distinguished from that species by the following characters: pronotum widest at base (vs widest near middle); median sulcus of metaventrite short, ~ 1 / 2 the length of metaventrite (vs much longer, ~ 3 / 4 the length of metaventrite); parameres of aedeagus much wider, apex nearly straight (vs parameres much narrower, apex curved).
description: Published as part of Jiang, Ri-Xin, Wu, Ping-Lan & Chen, Xiang-Sheng, 2024, Five new species of the genus Grouvellinus Champion, 1923 from Guizhou Province, China (Coleoptera, Elmidae), pp. 73-97 in ZooKeys 1219 on pages 73-97, DOI: 10.3897/zookeys.1219.125754