Chimarra bispinosa Gibbs, 1973

Blahnik, Roger & Andersen, Trond, 2022, New species of the genus Chimarra Stephens from Africa (Trichoptera, Philopotamidae) and characterization of the African groups and subgroups of the genus, ZooKeys 1111, pp. 43-198 : 43

Chimarra bispinosa Gibbs, 1973

Fig. 6A-F

Chimarra bispinosa Gibbs, 1973: 367, figs 8-10.

Chimarra bispinosa Gibbs: Gibon 1985: 28 (distribution: Ivory Coast).

Material examined.

Ghana - Brong Ahafo Reg. ● 2♂♂ 1♀; Kintampo, Saunders Waterfall ; 8°05'23"N, 1°41'50"W; 19 June 1993; JS Amakye & J Kjærandsen leg. ; light trap; ZMBN ● 1♂; same collection data as for preceding except 13 Feb. 1993; J Kjærandsen leg. ; sweep net; ZMBN. - Central Reg. ● 4♂♂ 9♀♀; Kakum Forest Reserve ; 5°21'N 1°22'W; 8-15 June 1994; T Andersen leg. ; Malaise trap; ZMBN ● 1♂ 1♀; same collection data as for preceding except 8 Nov. 1994 ; light trap; ZMBN. - Eastern Reg. ● 1♂; Boti Falls ; 6°11'40"N, 0°13'05"W; 24 Feb. 1993; JS Amakye & J Kjærandsen leg. ; light trap; ZMBN ● 1♂; same collection data as for preceding; UMSP ● 1♂; Kibi, Subri stream; 6°10'N, 0°33'W; 5 Nov. 1993; J Kjærandsen leg. ; light trap; ZMBN. - Volta Reg. ● 2♀♀; Wli, Agumatsa waterfall, station # 1A; 7°07'29"N, 0°35'31"E; 5-14 Mar. 1993; JS Amakye & J Kjærandsen leg. ; Malaise trap; ZMBN ● 1♂ 6♀♀; same collection data as for preceding except 12-21 Nov. 1993; J Kjærandsen leg. ; ZMBN ● 2♂♂; same collection data as for preceding except station # 1B; 11-14 Mar. 1993; JS Amakye & J Kjærandsen leg. ; ZMBN ● 8♂♂; same collection data as for preceding except 12-21 Nov. 1993; J Kjærandsen leg. ; ZMBN ● 3♂♂ 3♀♀; same collection data as for preceding except station # 3A; 4-13 Mar. 1993; JS Amakye & J Kjærandsen leg. ; ZMBN ● 1♀; same collection data as for preceding except 11-20 Nov. 1993; J Kjærandsen leg. ; ZMBN ● 1♂; same collection data as for preceding except station # 3B; 4-7 Mar. 1993; JS Amakye & J Kjærandsen leg. ; UMSP ● 226♂♂ 95♀♀; same collection data as for preceding except station # 3; 10 Mar. 1993; JS Amakye & J Kjærandsen leg. ; light trap; ZMBN ● 1♀; same collection data as for preceding; UMSP ● 113♂♂ 438♀♀; same collection data as for preceding except 17 Nov. 1993; J Kjærandsen leg. ; ZMBN ● 1♂ 1♀; same collection data as for preceding except station # 6; 11 Mar. 1993; JS Amakye & J Kjærandsen leg. ; ZMBN ● 2♀♀; same collection data as for preceding except 20 Nov. 1993; J Kjærandsen leg. ; ZMBN.

Diagnosis.

The two species included in this subgroup are very similar. The differences, as evident from the original illustrations, lie mostly in the shape and length of the lateral lobes of tergum X, the relative shape of the apices of these lobes, as well as in the more bulbous bases of the phallic spines in C. bispinosa . It is also possible that the overall shape of the inferior appendages in C. cara are slightly more rounded. The specimen illustrated here (Fig. 6A-F ) most closely conforms to C. bispinosa and we have identified it as such. Any minor differences from the original illustration should not be accorded significance, at least until the variation within the two known species of the subgroup is better assessed.

Redescription.

Adult. Overall color (in alcohol) light brown, appendages paler, head and prothorax slightly darker (anterior and posterior setal warts pale and contrasting). Head short and rounded (postocular parietal sclerite short). Palps relatively short; maxillary palp with 1st segment very short (approximately as long as wide), 2nd segment short (slightly> 2 × 1st), apex with cluster of ~ 12 stiff setae, 3rd segment moderately elongate, distinctly longer than 2nd, 4th segment short (shorter than 2nd), 5th segment slightly longer than 3rd. Forewing length: male, 5.5-7.0 mm; female, 6.5-7.5 mm. Fore- and hind wings with forks I, II, III, and V present. Forewing with R1 somewhat sinuous, stem of Rs inflected at past midlength, with distinct node at inflection, extending into cell below, basal fork of discoidal cell distinctly enlarged, fork asymmetric, length of cell slightly> 2 × width, fork I subsessile, fork II sessile, r crossvein diagonal, intersecting discoidal cell at fork I, chord nearly linear (s and r-m, crossveins linear, m crossvein diagonal, continuous with r-m), s pigmented (like wing), r-m and m hyaline, 2A with crossvein, (apparently forked apically to 1A and 3A). Hind wing with R1 narrowly parallel to subcosta, forks I and II subsessile, fork III distal and relatively wide, anal loop small and incomplete (not joining 1A). Forelegs with apical tibial spur short; male with foretarsi unmodified, claws small and symmetrical.

Male genitalia. Segment VIII relatively short, tergum wider dorsally, sternum without posteroventral projection. Segment IX, in lateral view, short, with anteroventral margin weakly, angularly inflected in basal 1/4, concavely narrowing dorsally; tergum very short dorsally, with short anterior apodemes; dorsal margin very narrow, but continuous mesally between apodemes; posterior margin with inferior appendages mounted relatively high on segment, below mid-height, margin very weakly produced below preanal appendages, basally with short, subtriangular, posteriorly projecting, ventral process; anterior margin of sternum subtruncate as viewed dorsally or ventrally, slightly concave mesally. Lateral lobes of tergum X short and simple in form, without periphallic processes, each lobe with short, acute, preapical lateral projection, basally with very short, digitate process with 2 apical sensilla; mesal lobe of tergum X membranous and divided mesally, continuous with sclerotized lateral lobes. Preanal appendages short and knob-like, slightly flattened, membranous basally. Inferior appendage very short and rounded apically, with weak basal inflection, marginally with elongate setae; as viewed ventrally or caudally, with distinct cusp on mesal surface and very short, mesally directed, basodorsal process. Phallic apparatus relatively short, phallobase tubular, with usual basodorsal expansion, ventral margin slightly bulging, with weakly sclerotized ventral projection; endotheca with two short and nearly symmetrically positioned spines, each with enlarged base, membrane not or only weakly textured, phallotremal sclerite complex not evident.

Distribution.

Ghana, Ivory Coast.

Figures

Figure 6. Chimarra bispinosa Gibbs, ♂ genitalia A lateral B dorsal, segments IX and X C inferior appendage, ventral D inferior appendage, dorsal E inferior appendage, oblique lateral F phallus, lateral.