Cheumatopsyche galahittigama ( Schmid 1958 )

Pandher, Manpreet Singh, Malicky, Hans & Parey, Sajad H., 2018, New species of the genus Cheumatopsyche Wallengren 1891 (Insecta: Trichoptera: Hydropsychidae) from Indian Himalaya, Zootaxa 4379 (3), pp. 407-420 : 415-418

Cheumatopsyche galahittigama ( Schmid 1958)

( Figs. 29–33 )

Hydropsychodes galahittigama Schmid 1958 , 7, 10, 13, 19, 24, 28, 36, 115–116, pl. 20 figs. 10–11; holotype male, Pooprasie 21-I (Central Province, Ceylon [ Sri Lanka]) or Kitulgala 28-I (Sabaragamuwa, Ceylon [ Sri Lanka]), deposition unknown, probably Canadian National Collection.

Material examined. 2 males, 1 female; India: Uttarakhand; Mori , 2000 m, 29-ix-2008, Pandher & Parey ( NPC) . Uttarakhand, Purola , 1600 m, 28-ix-2008, 3 males, 1 female, Pandher & Parey ( NPC) .

Diagnosis. This species is similar to Cheumatopsyche chryseis Malicky & Chantaramongkol 1997 , Ch. diehli Malicky 1997 , and Ch. cornix Malicky 1997 , all reported from Thailand. It more closely resembles Ch. chryseis on the basis of the shape of the phallus in lateral view. However, segment X is not produced mesally in dorsal view in Ch. galahittigama , whereas it is produced in Ch. chryseis , a basic difference that segregates these two species. There is also a remarkable difference in the body of segment X in lateral view in the two species.

Description. Adult male; color in alcohol light brown, maxillary and labial palps yellow, forewings pale, hyaline, straw colored; dorsum of head dark brown. Length from tip of head to apices of folded forewings 6.25 mm; maxillary palps each 1.50 mm long, segment II slightly longer than III, V flexible, long; labial palps each 0.50 mm long. Length of each forewing about 5.50 mm; crossvein m-cu and cu almost tangential in oblique line; Cu2 and 1A running separately before wing margin. Hind wings each 3.75 mm long; Sc and R meeting apically beyond crossvein r by a distance almost equal to length of crossvein r; crossvein s apical to crossvein r; fork I absent.

Male genitalia ( Figs. 29–33 ). Abdominal segment IX annular, longitudinally short; sternum longer than tergum; anterior margin of segment IX convex, smooth dorsolaterally in lateral view; apical lobe on posterolateral margin blunt and slightly produced over sclerotized articulation cavity of inferior appendages; spine row on posterior margins of segment IX heterogeneous, some spines on pair of apicodorsal corners of tergum IX twice as long as spines of apicolateral lobes; Pair of triangular apicolateral corners of tergum IX separated at middle in dorsal view. Intersegmental depression between segments IX and X not clearly demarcated. Segment X moderately long, narrowing towards acute apex in lateral view, distal part formed by smooth mesocaudal lobe and apicoventral setal lobes; segment X quadrate in dorsal view, dorsal interlobular gap absent, smooth mesocaudal lobe large and quadrate, pair of apicoventral setal lobes modified into broad lateral surfaces, pair of lateral setose areas (superior or preanal appendages) forming small circular and elevated setal warts laterally on segment X. Inferior appendages each longer than segment X; coxopodite (basal segment) forming straight rod dilating gradually apically, curving mesad in ventral view; harpago (apical segment) broad at base, claw-like in ventral view, hooked mesad apically. Phallus with phallotheca having well developed depressed anterior part, bent gradually caudad distally, subapical dorsum concave; endophallus forming narrow tube running through entire phallotheca, ending on sclerotized gonopore; pair of sclerotized endothecal processes circular; phallotremal sclerites vertically tall in lateral view; vestigial ventral endothecal lobes membranous.

Distribution. India: Uttarakhand.

Figures

FIGURES 29–33. Ch. galahittigama (Schmid 1958), male genitalia. 29, left lateral; 30, dorsal; 31, right inferior appendage, ventral; 32, phallus, lateral; 33, phallus, ventral.