Chaetophora morettoi, 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 : 215-216

Chaetophora morettoi sp. nov. [ Figures 1A‒1I , 5 , 10 , 15 , 20 , 25A‒25C , 28 ]

Type locality. Côte d’Ivoire, Gbando Village .

Type material. Holotype male, deposited at BMNH “ IVORY COAST 417m Gbando Village (sudanian forest with gallery forest) 09°34’17.1”N, 06°41’1.1”W 15-22.vi.2018 // MV Light Trap. Aristophanous, M., Miles, W., Moretto, P., Outtara, Y. leg. ANHRT: 2018.28, BMNH(E) 2018-153 // NMHUK014381512”. Additional label on red paper added “ Chaetophora morettoi sp. nov. K. Matsumoto det. 2020 HOLOTYPE ♂ ” . Paratypes (24 specimens. BMNH, MMUE): same locality data as holotype with additional label: “NMHUK013679876”, “NMHUK013679877”, “NMHUK014381490”, “NMHUK014381491”, “NMHUK014381492”, “NMHUK014381493”, “NMHUK014381494”, “NMHUK014381495”, “NMHUK014381496”, “NMHUK014381497”, “NMHUK014381498”, “NMHUK014381499”, “NMHUK014381500”, “NMHUK014381501”, “NMHUK014381502”, “NMHUK014381503”, “NMHUK014381504”, “NMHUK014381505”, “NMHUK014381506”, “NMHUK014381507”, “NMHUK014381508”, “NMHUK014381509”, “NMHUK014381510” and “NMHUK014381511”. All paratype specimens have been labelled with a red paratype label: “ Chaetophora morettoi sp. nov. K. Matsumoto det. 2020 PARATYPE ” .

Description. Body: Circular, dorsum convex. BL: 1.18 mm, EL: 0.86 mm, EW: 0.90 mm, PL: 0.32 mm, PW: 0.77 mm. Colour: Dorsal side light reddish-brown; venter light reddish-brown, tibia light reddish-brown, tarsal claws light brown.

Dorsum ( Fig. 5 ). 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 nearly right angled; 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. 10 ). 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. 20 ).

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. 25A‒25C ). Length: 0.49 mm. Parameres very much reduced. Median lobe long and thin, width constant and parallel in ventral view, apical end pointed; strongly curved in lateral view; apical end pointed. Phallobase oval.

Female. No external morphological difference from male.

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

Etymology. This species is named after Philippe Moretto, specialist in African dung beetles, who collected these specimens.

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 Côte d’Ivoire.

Figures

FIGURE 1. Chaetophora morettoi sp. nov. adult morphology. A) Head; B) pterothorax, ventral; C) pterothorax, frontal; D) prothorax, ventral; E) abdomen; F) antennae; G) fore leg; H) middle leg; I) hind leg.

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.