Chimarra calidopectoris, Wahlberg & Espeland & Johanson, 2014

Wahlberg, Emma, Espeland, Marianne & Johanson, Kjell Arne, 2014, Seven new species of Chimarra (Trichoptera: Philopotamidae) from Malawi, Zootaxa 3796 (3), pp. 579-593 : 591-592

Chimarra calidopectoris , new species

( Figs 5 , 13 , 51–56 )

Diagnosis. The species is unique in the distally widened and apically hooked shape of the inferior appendages, the narrow tergum X in lateral view slightly bending ventrad after mid length and with complex processes along dorsal and lateral surfaces, and the heart-shaped apex of the phallus in dorsal view. It resembles Chimarra intexta Mosely 1931 , from Sierra Leone, which also possesses hook-shaped processes on the inferior appendages, similar lateral lobes of tergum X, lateral phallothecal processes and a pair of small phallic spines. However, the inferior appendage processes of C. calidopectoris are more strongly curved and elongate and the quadrate dorsal process of each lateral lobe of tergum X of C. calidopectoris is not present in C. intexta . The posteroventral process of segment IX in C. calidopectoris is large and triangular, where the posteroventral process of C. intexta is small, elongate and rounded.

Description, male: Colour (in alcohol): Head orange; head setal warts pale; antennae light brown; eyes and margins of ocelli black; thorax orange; thoracic setal warts pale; wings brown; tibiae and tarsi light brown; tibial spurs dark brown; abdomen brown. Forewings each 7.0 mm (n=2), length over width ratio 3.3; small pale hyaline spot stretching from arculus to halfway between Cu2 and posterior branch of Cu1b; discoidal cell about 3 times longer than wide, originating shortly before mid length of wing; median cell half as long as discoidal cell; fork I originating at crossvein r, wide at base and end, slightly constricted at middle; nygma situated close to base of fork II. Fork III 4.5 times longer than wide. Hind wings each 5.8 mm (n=2), length over width ratio 2.7; anterior margin curved.

Genitalia: Segment IX with large, triangular posteroventral process. Preanal appendages almost oval in lateral view, circular in dorsal view, setose, situated immediately below base of tergum X. Tergum X divided into two pairs of lobes; in lateral view lateral lobes each with erect quadrate dorsal process at mid length and lobe curving ventrad after mid length; lateral lobes in dorsal view each with subapicolateral, barb-like, slightly sclerotized process; lateral and mesal lobes each with acuminate apex; in dorsal view mesal lobes with convex, semisclerotized subapicolateral process. Tergum IX apical dorsolateral corners curving dorsad, each divided apically into long and short sharp processes directed posterad. Inferior appendages each in lateral view fist-shaped, with dorsal projection thumb-like; posteroventral margin darkly sclerotized; in dorsal view anterior and posterior processes hooked, strongly curved mesad; posterior process with darkly sclerotized apex, visible in ventral view; setae concentrated on intermediate area between processes. Phallic apparatus with anterior part swollen; pair of endothecal spines situated about three-quarters distance from anterior end, as long as narrowest part of phallic apparatus in lateral view; in lateral view ventral spine curved ventrad, dorsal spine straight; posterior part of phallotheca divided into pair of poorly-sclerotized apicoventral spines beside and beneath membranous posterior end of endotheca.

Male holotype: Malawi: Mulanje Mountains: stream near Minunu hut, S15.92481°, E35.63856°, 2014 m, light trap, 10 November 2012, Loc # Ma 41, leg. M. Espeland, S. Dupont and R. Murphy ( Fig. 1 , locality #7) .

Paratypes: Same data as holotype: 2 males .

Etymology. Calidopectoris, from Latin calida, warm, and pectoris, heart, refers to the nickname of Malawi: “The Warm Heart of Africa”.

Figures

FIGURE 1. Map of Malawi showing locations of collection. Basemap provided by Esri et al. (2013).

FIGURES 2–5. Heads, dorsal. 2—C. zombaensis, new species, holotype; 3—C. flaviseta, new species, holotype; 4—C. psittaca, new species, holotype; 5—C. calidapectoris, new species, holotype.

FIGURES 7–13. Right wing, dorsal. 7—C. zombaensis, new species, holotype; 8—C. flaviseta, new species, holotype; 9—C. chichewa, new species, holotype; 10—C. circumverta, new species, holotype; 11—C. mulanjae, new species, holotype; 12—C. psittacus, new species, holotype; 13—C. calidopectoris, new species, holotype.

FIGURES 51–56. Chimarra calidopectoris, new species, holotype. 51—genitalia, left lateral; 52—phallic apparatus, left lateral; 53—phallic apparatus, dorsal; 54—genitalia, dorsal; 55—right inferior appendage, dorsal; 56—right inferior appendage, ventral.