Chaetophora milesi Matsumoto 2021, sp. nov.
Creators: name: Matsumoto, Keita
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Byrrhidae
Chaetophora
Chaetophora milesi

description: Chaetophora milesi sp. nov. [Figures 4, 9, 14, 19, 24A‒24C, 28]
Type locality. Sierra Leone, Tiwai Island.
Type material. Holotype male, deposited at BMNH “ SIERRA LEONE 120m Tiwai Island, Moa River N07°33’00”; W11°21’09” 17-22.vi.16 // Edwards Trap leg. Takano, Miles & Goff Trip Ref: SL-001 (ANHRT 18) BMNH(E) 2016-196 // NHMUK014404466”. Additional label on red paper added “ Chaetophora milesi sp. nov. K. Matsumoto det. 2020 HOLOTYPE ♂ ”.
Description. Body: Circular, dorsum convex. BL: 1.33 mm, EL: 0.97 mm, EW: 1.06 mm, PL: 0.36 mm, PW: 0.89 mm. Colour: Dorsal side dark brown; venter brown to dark reddish brown, tibia brown, tarsal claws light brown.
Dorsum (Fig. 4). Head: Partially retracted into pronotum; overall surface smooth, very few punctations across surface, deep groove present from the middle of the frons and extending towards the antennal insertion. Antennae: 11 segmented, clavate; 1 st and 2 nd AS longer than wide and medium sized, 3 rd to 9 th AS short and narrow, 10 th and 11 th AS enlarged. Pronotum: Transverse, widest at posterior, narrowest at anterior, narrower than elytra; anterior margin convex, posterior margin gently convex; lateral margin convex with slightly concave in the middle; surface covered with punctations, surface between punctures smooth; long and thin setae spread across surface. Scutellum: Triangular, small, longer than wide. Elytra: Slightly wider than long; anterior margin nearly straight; anterior lateral angle obtuse; lateral margins gently curve from anterior end to anterior 2/3, increase in curvature towards the apex; irregular surface with faint elytral striae punctuations; surface near elytral tip with small grooves; long and thin setae spread across surface.
Venter (Fig. 9). Prosternum: Concave on anterior margin; prosternal process as long as wide, narrows towards apex, posterior margin rounded. Mesoventrite: Wider than long; anterior margin concave where prosternal process fits; lateral sub-parallel and gently concave, posterior slightly convex. Metaventrite: Wider than long, flat in the middle; relatively large and shallow punctures spread across surface. Abdomen: Five clearly visible ventrites. Intercoxal process triangular with rounded apex. Posterior margin of 1 st ventrite flat; 2 nd to 4 th ventrites concave, 5 th ventrite nearly semi-circle, posterior end flat. Surface covered with short, brown, setae on the outer margin (Fig. 19).
Legs. Tibiae: Outer lateral margin almost straight, inner lateral margin straight. Tarsi: Simple, segments increase in length towards the apex. Tarsal claws: Simple, narrow, symmetrical.
Male. Genitalia (Figs. 4‒6). Length: 0.65 mm. Parameres very much reduced. Median lobe long and thin, width constant and parallel in ventral view, apical end pointed; gently curved in lateral view; apical end pointed. Phallobase oval.
Female. Unknown.
Distribution. C. milesi sp. nov. is known only from the type locality.
Etymology. This species is named after the Will Miles who collected this specimen.
Differential diagnosis. Combination of key characters which can differentiate the new species from other species of the genus are displayed in Table 1.
Remarks. This species is the first country record of this genus for Sierra Leone.
description: Published as part of Matsumoto, Keita, 2021, New species, new records and notes of Afrotropical Chaetophora Kirby & Spence 1817 (Coleoptera: Byrrhidae: Syncalptinae), pp. 211-223 in Zootaxa 5067 (2) on pages 212-215, DOI: 10.11646/zootaxa.5067.2.3, http://zenodo.org/record/5677797