Chimarra kibiensis, Blahnik & Andersen, 2022

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 kibiensis sp. nov.

Fig. 33A-G

Type material.

Holotype. Ghana - Eastern Reg. ● ♂ (in alcohol); Kibi, Subri stream; 6°10'N, 0°33'W; 5 Nov. 1993; J Kjærandsen leg.; light trap; UMSP 000550030.

Additional material.

Ghana - Eastern Reg. ● 1♀; Kibi, Subri stream; 6°10'N, 0°33'W; 5 Nov. 1993; J Kjærandsen leg.; light trap; UMSP .

Diagnosis.

Chimarra kibiensis is very similar to C. minacis sp. nov., as discussed in the diagnosis for that species, but the dorsal spine-like lobes of tergum X are shorter, and the ventral lobes of the tergum are longer, with the apices longer, more strongly ventrally curved, and also more sclerotized. Additionally, the inferior appendage in C. kibiensis , in lateral view, has an evident tooth on its posterior margin, whereas C. minacis has a pair of small mesal teeth or cusps; these are only readily evident in caudal view.

Description.

Adult. Overall color (in alcohol) nearly uniformly yellowish brown, spurs slightly darker. Head moderate in length (postocular parietal sclerite slightly> 1/2 diameter of eye). Palps moderately elongate; maxillary palp with 1st segment very short (approximately as long as wide), 2nd segment relatively short (<3 × 1st), apex with small cluster of stiff setae, 3rd segment elongate, almost 2 × length of 2nd, 4th segment very short (shorter than 2nd), 5th segment subequal to 3rd. Forewing length: male, 5.5 mm. Fore- and hind wing with forks I, II, III, and V present. Forewing with R1 sinuous, stem of Rs inflected at past midlength (with small node at inflection), basal fork of discoidal cell somewhat enlarged, fork slightly asymmetric, length of cell ~ 2 × width, forks I and II subsessile, r crossvein diagonal, intersecting discoidal cell at approximately midlength, s and r-m, crossveins linear, m crossvein more proximal, s pigmented (like wing), r-m and m crossveins hyaline, 2A with crossvein (apparently forked apically to 1A and 3A). Hind wing with R1 narrowly parallel to subcosta, forks I and II subsessile. Forelegs with apical tibial spur distinct; male with foretarsi unmodified, claws small and symmetrical.

Male genitalia. Segment VIII short, tergum not wider, sternum without ventromesal projection. Segment IX, in lateral view, with anteroventral margin distinctly produced, anterodorsal margin with broadly rounded apodeme, margin between strongly concave; dorsomesal margin of segment very short, but continuously sclerotized; posterior margin strongly produced in ventral half, strongly narrowed dorsally above inferior appendages, segment very short dorsally; ventral process emerging from ventral margin, very elongate, digitate, with apex rounded in lateral view, apex with short spines or setae; anteroventral margin of segment, in dorsal or ventral views, concave. Lateral lobes of tergum X each divided laterally into dorsal and ventral lobes, dorsal lobes strongly upturned and spine-like, recurved and very strongly sclerotized, especially compared to base, almost appearing as separate structures; ventral lobes very elongate and strongly sclerotized, with apices strongly, angularly downturned, apices of lobes rounded. Preanal appendages short and knob-like, constricted basally. Inferior appendage with pronounced basal inflection, dorsally with moderately elongate, tapering dorsal projection, apex subacute; posteromesal margin with prominent sclerotized cusp, readily visible in lateral view. Phallic apparatus with phallobase moderately elongate, with usual basodorsal expansion, apical half strongly flared and vase-like, apicoventrally with short rounded, sclerotized projection; endotheca with two moderately elongate, slender, symmetrically positioned spines, phallotremal sclerite complex composed of short rod and ring structure, with small apical sclerite.

Etymology.

Chimarra kibiensis , name used as an adjective (from Kibi), for the name of the town near where the type specimen was collected.

Figures

Figure 33. Chimarra kibiensis sp. nov., ♂ genitalia A lateral B dorsal, segments IX and X C inferior appendage, ventral D inferior appendage, caudal E phallus, lateral F phallus, dorsal G ventral lobes of tergum X, caudal.