Anisocentropus (Anisokantropus) dvaupadhah, Oláh & Johanson, 2010

Oláh, János & Johanson, Kjell Arne, 2010, Description of 33 new species of Calamoceratidae, Molannidae, Odontoceridae and Philorheithridae (Trichoptera), with detailed presentation of their cephalic setal warts and grooves 2457, Zootaxa 2457 (1), pp. 1-128 : 56-57

Anisocentropus (Anisokantropus) dvaupadhah , new species

Figs 113–116

This species resembles A. pandora Malicky & Chantaramongkol from Thailand in having bilobed gonocoxites. Anisocentropus dvaupadhah is separated from A. pandora in the presence of 4 processes instead of 1 process at the median dorsum basally on segment X, visible between the preanal appendages in dorsal view. Other distinguishing characters are the presence of more slender, finger-like preanal appendages; and the presence of a pair of robust, foot-shaped processes on the dorsum of segment X, visible in dorsal and lateral view. The other known species with divided gonocoxites is A. pan Malicky & Chantaramongkol from Thailand. In A. pan the gonocoxites are trilobed, and the preanal appendages are bilobed.

Male (in alcohol). Body large; light brown; legs, antennae and palps lighter than rest of body; wings uniformly pale brown. Head rectangular in dorsal view, half as long as broad. Ocelli absent. Cephalic and thoracic groove pattern and setal wart pattern unknown. Maxillary palps 6-segmented, filiform; maxillary palp formula II-I-(IV-V-VI)-III. Scapes rounded, half as long as head; pedicels half as long as scapes. Legs with symmetrical claws; spur formula 2, 4, 3; each foreleg with posteroapical spur 2 times longer than anteroapical spur; midleg anterior spurs 1/4th as long as posterior spur; hind leg anteroapical spur 1/5th as long as posteroapical spur. Forewings: length 15.0 mm; membrane light brown, without visible pattern, setae pale; R1 apparently confluent with, or recurrent into R2 well before C, terminal end of R1 probably disappeared, crossvein r joining R1 and R2; base of discoidal cell located proximally of wing middle; forks I, II, III, IV, V present; crossveins h, sc-r, s, r-m, m, m-cu, cu1, cu2 and cu-a present; only crossvein r absent; postanal vein absent. Hind wings: R1 fusing with R2; forks I, II, III, V present; fork I longer than fork II.

Male genitalia. Abdominal segment IX fused annularly, without longitudinal groove separating dorsal, mesal and ventral parts; tergum short, narrowing dorsally; venter broad, flat, producing into posteromedian, small triangle visible in lateral and ventral view; anterior margin convex, more strongly developed at ventral half; posterior margin straight. Antecosta weakly developed, forming narrow, marginal rim; equally thin along margin, without conspicuous external groove of antecostal suture; tergum with small mesal triangular; spine row absent on posterior margins of segment IX; segment smoothly glabrous, except at large ventral area and small dorsolateral area. Intersegmental depression between segment IX and segment X sloping, basally occupied by 2 pairs short processes in lateral view, mesal pair setose, lateral pair bare glabrous. Segment X nearly as long as gonocoxites; dorsal basement at tergum IX armed with 2 pairs short processes. Apicoventral setose lobes with marginal rim, curving ventrolaterad. Apicodorsal setose lobes in lateral and dorsal view formed like feet. Dorsal interlobular gap narrow, deep. Superior or preanal appendages long, filiform, slightly curving ventrad in lateral view; curving mesad in dorsal view. Gonocoxites without harpago; divided into short dorsal and long ventral lobe. Phallic apparatus forming horizontal, straight tube; slightly convex basally; ventral margin concave; phallicata dilated. Phallotremal sclerite curving inside membranous phallicata; end part of ejaculatory duct visible.

Holotype male: MALAYSIA: Peninsular (no other data available).

Distribution: Malaysia (Peninsular).

Etymology: Dvaupadhah, after “dvau padhah” in Sanskrit, meaning 2 feet, named after the presence of foot-like processes on the dorsum of segment X, visible in lateral and dorsal view.

Remarks: The holotype male is pinned and the cephalic and thoracic groove and setal wart patterns was impossible to examine on the dry mounted head and thorax.

Figures

FIGURES 113–116. Anisocentropus dvupadhah, new species, holotype. 113 — genitalia, lateral; 114 — genitalia, dorsal; 115 — gonocoxite, ventral; 116 — phallus, lateral.