Chimarra psittacus, 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 : 589-591

Chimarra psittacus , new species

( Figs 4 , 12 , 45–50 )

Diagnosis. The male of this species has inferior appendages similar to those of C. mulanjae , new species, but is distinguished by the posteroventral process of segment IX that is undivided at the apex in C. psittacus . The presence of a beak-like phallotheca with an irregularly sclerotized distal half and ventrally situated tubular endotheca distinguishes the species from other Afrotropical species. It is also similar to C. mulanjae and C. gassa in their phallic spine composition and their apicoventrally truncate mesal lobes of tergum X, but the spines of C. psittacus are smaller and less curved than in those species. The mesal lobes of tergum X are thin and sharp in dorsal view in C. psittacus in contrast to the rounded apices in C. gassa and they are not divided apically in dorsal view as in C. mulanjae .

Description, male: Colour (in alcohol): Head yellow; dark brown triangle located between ocelli, eyes light brown; head setal warts light brown; antennae dark brown; pronotum yellow; meso- and metanota brown; wings dark brown; tibiae and tarsi light brown; tibial spurs dark brown; abdomen brown. Forewings each 6.1 mm (n=4), length over width ratio 3.2; pale hyaline spots located as in Fig. 12 ; discoidal cell about 3 times longer than wide, originating shortly before mid length of wing; median cell two-thirds as long as discoidal cell; fork I originating after crossvein r at distance equal to length of crossvein r; nygma situated at base of fork II; fork III 4.2 times longer than its width. Hind wings each 4.8 mm (n=4), length over width ratio 2.7; anterior margin strongly curved.

Genitalia: Segment IX with three protruding processes along posterior margin in lateral view: posterodorsal process thorn-shaped in lateral view, darkly sclerotized; process on each side slightly above mid height of segment triangular, with darkly sclerotized apex; posteroventral process large, concave dorsally, with pointed apex. Preanal appendages small, oval in lateral view, cone-shaped in dorsal view. Tergum X divided into two pairs of lobes; mesal lobes large, almost as tall as long in lateral view, with right-angled dorsal margin and truncate apicoventral margin; in dorsal view each mesal lobe with thin, sharply pointed, sclerotized apex and with triangular process situated laterally at one-third length; lateral lobes small, each with darkly sclerotized apicolateral barb; posterodorsal margin of segment IX darkly sclerotized. Inferior appendages each long, nearly oval in lateral view, with darkly sclerotized and convex basodorsal bulge and with darkly sclerotized, triangular basoventral process sharp, curving mesad; distal margins fringed with setae, mesal margins darkly sclerotized. Phallic apparatus bulbous anteriorly, tubular and irregularly sclerotized posteriorly with ventral part of apex curving ventrad, sharply pointed in lateral view, strongly sclerotized; endotheca with two pairs of sclerotized spines: anterior pair curved dorsad in lateral view, straight in ventral view; posterior pair straight in lateral and ventral views; membranous endothecal apex tube-shaped; phallotremal spines not strongly sclerotized.

Male holotype: Malawi: Nyika: North Rukuru River at Chisanga Bridge , S10.53832°, E33.69138°, 1828 m, light trap, 27-28 October 2012, Loc # Ma 32, leg. M. Espeland, S. Dupont and R. Murphy ( Fig. 1 , locality #6) .

Paratypes: Same data as holotype: 6 males, 3 females .

Etymology. Psittacus, from Latin, “parrot,” a masculine noun in apposition to Chimarra , referring to the parrot-beak-shaped phallotheca.

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 39–50. Chimarra new species, male genitalia. 39–44, Chimarra mulanjae, new species, holotype: 39—genitalia, left lateral; 40—phallic apparatus, left lateral; 41—phallic apparatus, dorsal; 42—genitalia, dorsal; 43—right inferior appendage, dorsal; 44—right inferior appendage, ventral. 45–50, Chimarra psittacus, new species, holotype: 45—genitalia, left lateral; 46—phallic apparatus, left lateral; 47—phallic apparatus, dorsal; 48—genitalia, dorsal; 49—right inferior appendage, dorsal; 50—right inferior appendage, ventral.