Chaetophora smithi, Matsumoto, 2021

Matsumoto, Keita, 2021, New species, new records and notes of Afrotropical Chaetophora Kirby & Spence 1817 (Coleoptera: Byrrhidae: Syncalptinae), Zootaxa 5067 (2), pp. 211-223 : 216-220

Chaetophora smithi sp. nov. [ Figures 6 , 11 , 16 , 21 , 26A‒26C , 28 ]

Type locality. Zambia, Nkwaji .

Type material. Holotype male, deposited at BMNH “ ZAMBIA, 1316m, Nkwaji, open Dambo, S11°31’21”; E24°32’32”, 29.x-3.xi.13 // Yellow Pan, leg. Smith,R., Takano,H., Chmurova,L. & Smith,L. BMNH(E) 2015-19 // NHMUK013996862”. Additional label on red paper added “ Chaetophora smithi sp. nov. K. Matsumoto det. 2020 HOLOTYPE ♂ ”.

Description. Body: Elongate, oval, dorsum convex. BL: 1.59 mm, EL: 1.21 mm, EW: 1.30 mm, PL: 0.38 mm, PW: 1.03 mm. Colour: Dorsal side dark brown to reddish-brown; venter brown to reddish brown, tibia reddishbrown, tarsal claws brown.

Dorsum ( Fig. 6 ). 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 sinuate with concave in the middle; surface almost smooth with few visible punctations scattered; short and slightly thick setae spread across surface. Scutellum: Triangular, small, longer than wide. Elytra: Slightly wider than long; anterior margin concave; anterior lateral angle obtuse; lateral margins gently curved throughout towards the apex; majority of surface smooth; clearly visible elytral striae punctuations; surface near elytral tip with small grooves; short and slightly thick setae spread across surface.

Venter ( Fig. 11 ). 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 medium sized punctures spread across surface. Abdomen: Five clearly visible ventrites. Intercoxal process triangular with flat apex. Posterior margin of 1 st ventrite flat; 2 nd to 4 th ventrites strongly concave, 5 th ventrite nearly semi-circle, posterior end flat. Surface covered with short, brown, setae on the outer margin ( Fig. 21 ). 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. 10‒12 ). Length: 0.67 mm. Parameres very much reduced. Median lobe long and thin, width narrows towards the apical end, apical end pointed and pointed towards the lateral side in ventral view; thin in apical half, thicker in basal half, sinuate in lateral view; apical end pointed. Phallobase square with rounded lateral end.

Female: Unknown.

Distribution: C. smithi sp. nov. is known only from the type locality.

Etymology: This species is named after Richard E.L. Smith, who is the founder of the African Natural History Research Trust (ANHRT) and collected this new species.

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 Zambia.

Figures

FIGURE 28. Distribution map of known Afrotropical Chaetophora spp.

FIGURES 2‒6. Dorsal habitus of Afrotropical Chaetophora spp. 2) C. medleri Johnson, 1978 [holotype]; 3) C. medleri Johnson, 1978 [NHMUK014404467]; 4) C. milesi sp. nov. [holotype]; 5) C. morettoi sp. nov. [holotype]; 6) C. smithi sp. nov. [holotype].

FIGURES 7‒11. Ventral habitus of Afrotropical Chaetophora spp. 7) C. medleri Johnson, 1978 [paratype]; 8) C. medleri Johnson, 1978 [NHMUK014404467]; 9) C. milesi sp. nov. [holotype]; 10) C. morettoi sp. nov. [holotype]; 11) C. smithi sp. nov. [holotype].

FIGURES 12‒16. Lateral habitus of Afrotropical Chaetophora spp. 12) C. medleri Johnson, 1978 [holotype]; 13) C. medleri Johnson, 1978 [NHMUK014404467]; 14) C. milesi sp. nov. [holotype]; 15) C. morettoi sp. nov. [holotype]; 16) C. smithi sp. nov. [holotype].

FIGURES 17‒21. Abdomen of Afrotropical Chaetophora spp. 17) C. medleri Johnson, 1978 [holotype]; 18) C. medleri Johnson, 1978 [NHMUK014404467]; 19) C. milesi sp. nov. [holotype]; 20) C. morettoi sp. nov. [holotype]; 21) C. smithi sp. nov. [holotype].

FIGURES 22‒26. Genitalia of Afrotropical Chaetophora spp. 22) C. medleri Johnson, 1978 [holotype]; 23) C. medleri Johnson, 1978 [NHMUK014404467]; 24) C. milesi sp. nov. [holotype]; 25) C. smithi sp. nov. [holotype]; 26) C. morettoi sp. nov. [holotype]. A = genitalia, lateral view, B = genitalia ventral view, C = genitalia, phallobase.