Chimarra zombaensis, 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 : 581-583

Chimarra zombaensis , new species

( Figs 2 , 7 , 14–19 )

Diagnosis. The male of this species resembles those of C. flaviseta , new species, and C. somereni Marlier 1951 , from Kenya; these three species are distinguished from other Afrotropical species by the presence of a pair of long, straight anterior phallic spines and one shorter, posteroapical phallic spine. The apex of the apical endothecal spine is bent abruptly dorsad and the lobes of tergum X are wide and blunt in C. zombaensis , but the spine is only gradually curved and the lobes of tergum X are very slender in C. flaviseta . The lateral lobes of tergum X are triangular in lateral view and the inferior appendages each have a lateral projection in C. zombaensis , but the lateral lobes are nearly parallel-sided and the inferior appendages lack lateral projections in C. somereni . Chimarra uvirana ( Marlier 1951) , Democratic Republic of the Congo, has a similar posteroapical phallic spine but the anteriorly situated spines are considerably shorter and the posteroventral spine is elongate with a blunt apex.

Description, male. Colour (in alcohol): Head brown, warts pale brown; margins of ocelli black, eyes brown; thorax brown, warts pale brown; forewings dark brown; hind wings brown; abdomen brown. Forewings each 6.0 mm (n=1), length over width ratio 3.5; small pale hyaline spots distributed as in Fig. 7 ; discoidal cell 3x longer than wide, originating immediately before mid length of wing; median cell shorter than discoidal cell. Base of fork I originating after radial cross-vein at distance equal to length of cross-vein r; nygma situated at base of fork II; fork III 4 times longer than its width. Hind wings each 4.5 mm (n=1), length over width ratio 2.7; anterior margin strongly curved.

Male genitalia: Segment IX with pair of posterodorsal processes and pair of posteroventral processes; posterodorsal processes sharply triangular in lateral view, situated immediately below preanal appendages, sclerotized, darkly pigmented, apex setose; posteroventral processes almost trapezoidal in lateral view, large, sharply triangular in lateral view. Preanal appendages each directed dorsad, almost circular in lateral view, situated at mid height of base of tergum X; with scattered setae. Tergum X divided into pair of lateral lobes and pair of mesal lobes; each lateral lobe wide and sharply triangular in lateral view with darkly sclerotized process at mid length of dorsal margin simple and rounded in lateral view, causing tergum X to appear bifurcate in dorsal view; in dorsal view lateral lobe narrow, partly covering its mesal lobe, apically pointed; mesal lobes wide and blunt in lateral view, apically rounded and diverging in dorsal view. Inferior appendages each with sparse setae laterally on apical half, almost parallel-sided in lateral view, with sub-apical projection located at 4/5ths of its length and pointing ventrolaterad; in dorsal and ventral views inner margins of inferior appendages deeply concave, strongly sclerotized; each with apex narrow and sharply curving mesad in ventral and dorsal views and slightly beak-shaped in dorsal view. Phallic apparatus with bulbous anterior half about twice as high and wide as posterior half; apex bending posteroventrad. Phallic apparatus with anterior pair of long, slender endothecal spines parallel in their retracted position, smoothly curved ventrad in lateral view. Single apical endothecal spine almost straight in lateral view, except bent dorsad in right angle immediately before apex.

Male holotype: Malawi: Southern Region: Zomba, Old Naisi Road, above old parliament building, John

Wilson's garden, S15.37091°, E35.32430°, 1,030 m, [15] November 2012, leg. M. Espeland, S. Dupont and R .

Murphy ( Fig. 1 , locality #1). Etymology. Zombaensis named after the type locality Zomba .

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 14–25. Chimarra new species, male genitalia. 14–19, Chimarra zombaensis, new species, holotype: 14—genitalia, left lateral; 15—phallic apparatus, left lateral; 16—phallic apparatus, dorsal; 17—genitalia, dorsal; 18—right inferior appendage, dorsal; 19—right inferior appendage, ventral. 20–25, Chimarra flaviseta, new species, holotype: 20—genitalia, left lateral; 21—phallic apparatus, left lateral; 22—phallic apparatus, dorsal; 23—genitalia, dorsal; 24—right inferior appendage, dorsal; 25—right inferior appendage, ventral.