Cuspidevia pilosus, Bian & Hu & Tong, 2024

Bian, Dongju, Hu, Yuqi & Tong, Yanfeng, 2024, A new species of Cuspidevia Jaech & Boukal, 1995 (Coleoptera, Elmidae) from south China, Biodiversity Data Journal 12, pp. 117248-117248 : 117248

Cuspidevia pilosus sp. nov.

Materials

Type status: Holotype. Occurrence: recordedBy: Peng & Sun (39); individualCount: 1; sex: male; occurrenceID: 72C87AB3-955D-52D9-BA59-476DC72E9AC7; Taxon: scientificName: Cuspidevia pilosus; order: Coleoptera ; family: Elmidae ; Location : country: China; stateProvince: Guangdong; county: Shaoguan , Ruyuan ; locality: Nanling ; verbatimElevation: 626 m; verbatimCoordinates: 113°3' 2" E, 25°54 ’44” N; Event : eventDate: 27.11.2017; Record Level: institutionCode: IAECAS Type status: Paratype. Occurrence: recordedBy: Peng & Sun (39); individualCount: 7; sex: 4 males, 3 females; occurrenceID: C661F826-B3E7-5072-9626-028417C88998; Taxon: scientificName: Cuspidevia pilosus; order: Coleoptera ; family: Elmidae ; Location : country: China; stateProvince: Guangdong; county: Shaoguan , Ruyuan ; locality: Nanling ; verbatimElevation: 626 m; verbatimCoordinates: 113°3' 2" E, 25°54 ’44” N; Event : eventDate: 27.11.2017; Record Level: institutionCode: IAECAS Type status: Paratype. Occurrence: recordedBy: Peng & Sun (41); individualCount: 2; sex: male; occurrenceID: C64280C0-F287-54A1-9492-47205B9F5F8F; Taxon: scientificName: Cuspidevia pilosus; order: Coleoptera ; family: Elmidae ; Location : country: China; stateProvince: Guangdong; county: Shaoguan , Ruyuan ; locality: Nanling ; verbatimElevation: 755 m; verbatimCoordinates: 113°2' 45" E, 24°55 ’2” N; Event : eventDate: 27.11.2017; Record Level: institutionCode: IAECAS Type status: Paratype. Occurrence: recordedBy: Bian; individualCount: 1; sex: male; occurrenceID: 33457608-E5EB-5D95-A93A-CE107826D0A2; Taxon : scientificName: Cuspidevia pilosus; order: Coleoptera ; family: Elmidae ; Location : country: China; stateProvince: Guangdong; county: Shaoguan , Shixing ; locality: Chebaling Nat. Res. ; verbatimElevation: 374 m; verbatimCoordinates: 114.250760° E, 24.719415° N; Event : eventDate: 06.08.2022; Record Level: institutionCode: IAECAS Type status: Paratype. Occurrence: recordedBy: Bian, Guo & Tong (9); individualCount: 5; sex: 2 males, 3 females; occurrenceID: 56FC4DFD-13A4-5E37-9538-183D8205501B; Taxon: scientificName: Cuspidevia pilosus; order: Coleoptera ; family: Elmidae ; Location : country: China; stateProvince: Guangxi; county: Liuzhou , Rongshui ; locality: Xishan Forest ; Event : eventDate: 22.11.2011; Record Level : institutionCode: IAECAS Type status: Paratype. Occurrence: recordedBy: Bian, Guo & Tong (13); individualCount: 4; sex: male; occurrenceID: 09086976-8F61-519D-93D1-296B469DDBB4; Taxon: scientificName: Cuspidevia pilosus; order: Coleoptera ; family: Elmidae ; Location : country: China; stateProvince: Guangxi; county: Guilin , Longsheng ; locality: Huaping ; Event : eventDate: 27.11.2011; Record Level : institutionCode: IAECAS Type status: Paratype. Occurrence: recordedBy: Zhen-Xing Ma; individualCount: 2; sex: male; occurrenceID: 55D1211F-2AB7-5020-870B-0648EB434E27; Taxon: scientificName: Cuspidevia pilosus; order: Coleoptera; family: Elmidae; Location: country: China; stateProvince: Jiangxi; county: Longnan; locality: Jiulianshan N. R. ; Event: eventDate: 19.09.2020; habitat: on stone of a stream; Record Level: institutionCode: GUGC

Description

BL 3.0 mm, BW 1.3 mm. Habitus see Fig. 1 A and B. Body elongated obovate, dorsal surface black, except anterior margin of pronotum yellowish-brown, ventral surface dark brown. Legs brown, tarsi slightly lighter, mouth and antennae yellowish-brown.

Head. Labrum transverse, basal half densely micro-reticulate, distal half smooth and shiny, sparsely punctate and densely pubescent, with long setae laterally. Clypeus and frons densely punctate and pubescent, with some granules.

Pronotum. PL 0.85 mm, PW 0.90 mm. Pronotum (Fig. 2 A) subparallel in basal 0.4, distinctly attenuated anteriorly. Anterior angles acute, distinctly produced, posterior angles almost right-angled. Punctures and yellow pubescence densely distribute. Median sulcus is absent. Base with two rows of granules (3-4 granules). Sublateral carinae present in basal 0.3, slightly elevated.

Elytra. Elytra broadest at the middle, slightly narrowed anteriorly and distinctly attenuated posteriorly. Striae not developed, the first striae extending from base to basal 0.4, with large punctures deeply impressed (separated by 1-1.5 diameters), the striae Ⅱ to Ⅳ extending from basal 0.2 to 0.4. Intervals smooth and shiny, small punctures sparsely distributed and yellowish pubescence is dense. Intervals Ⅱ to Ⅳ distinctly elevated in basal 0.2. Intervals V, Ⅶ and Ⅷ carinate. Carinae V and VII extending from basal 0.1 to apex, carinae VIII extending from basal 0.1 to distal 1/6. Plastron is present from intervals 5 to lateral margin. Each elytral apex with an apical projection.

Ventral side of thorax. Prosternum densely pubescent. Prosternal process (Fig. 2 B) elongated, slightly narrowed from base to apex, apex broadly rounded, lateral margins distinctly rimmed; surface slightly wrinkled, punctures sparsely distributed, almost without pubescence. Metaventrite (Fig. 2 C) distinctly impressed in posterior 0.6, disc almost without pubescence, micro-reticulate, with a few small punctures; lateral areas densely pubescent. Two rows of large punctures on each side, one is behind the mesocoxae and the other one in front of the metacoxae.

Ventrites I-V. Middle discs of ventrites I-IV and basal 0.2 disc of ventrite V smooth and shiny, only with a few short setae and small punctures, other areas of all ventrites densely pubescent. Ventrite I concave in basal half, with a pair of ad-median carinae. Apex of ventrite V not emarginate.

Aedeagus (Fig. 3 A-C). 1.3 mm long, long and slender, cylindrical. Penis about 1.8 times as long as phallobase; basal half subparallel, then slightly narrowed to basal 0.8, distal 0.2 distinctly cuspidal; endophallus developed reaching distal 0.4 of phallobase; ejaculatory duct with distinct sclerotisation; ventral sac well-developed in distal 1/3, without subapical teeth. Parameres fused to penis, indistinct and apices of parameres reach basal 2/3 of penis.

Measurements. Males: BL 2.9-3.1 mm, BW 1.2-1.3 mm; females: BL 3.0-3.2 mm, BW 1.3-1.4 mm.

Diagnosis

This species is different from the other three known species in this genus by elytral intervals 5, 7 and 8 carinate, pronotum and disc of elytra densely pubescent and endophallus more developed reaching distal 0.4 of phallobase.

Etymology

The epithet is derived from the Latin adjective " Cuspidevia pilosus " = pilous, refers to dense pubescence on disc of elytra.

Distribution

China: Guangdong, Guangxi, Jiangxi.

Figures

Figure 1. Cuspidevia pilosus sp. nov., habitus. A dorsal view; B ventral view.

Figure 2. Cuspidevia pilosus sp. nov., holotype. A pronotum; B prosternum and prosternal process; C mesoventrite, metaventrite and ventrites.

Figure 3. Cuspidevia pilosus sp. nov., holotype, aedeagus. A ventral view; B dorsal view; C lateral view.