Hydropsyche meyi Oláh & Johanson, 2008

Oláh, J. & Johanson, K. A., 2008, Generic review of Hydropsychinae, with description of Schmidopsyche, new genus, 3 new genus clusters, 8 new species groups, 4 new species clades, 12 new species clusters and 62 new species from the Oriental and Afrotropical regions (Trichoptera: Hydropsychidae), Zootaxa 1802, pp. 1-248 : 81-82

Hydropsyche meyi Oláh & Johanson , new species

Fig. 122–126

This species is similar to H. forcipata Ulmer , a species also described from Mindanao in the Philippines. The new species is easily distinguished by having a narrow and shallow basal gap in the two-partite dorsal interlobular gap on segment X, not a very deep basal gap as in H. forcipata . Moreover, the apicoventral setose lobes are weakly curving ventrad, not strongly curving as in H. forcipata ; the acutely angled apical lobes of segment IX are located more dorsally; and the bilobed apex of the phallotheca is mesally serrate.

Male. Body and wings light brown with lighter pubescence. Forewing membrane uniformly ochraceous. Maxillary palp formula I-II-(III, IV)-V, segment V as long as sum of segments I–IV. Head dorsum yellowish, with 9 yellowish setal warts. Swollen setal wart present on proepisternum. Pretarsal claws asymmetrical, laterally flanked by setal bundle. Spur formula 244. Protibiae with posteroapical spur smaller than anteroapical spur.

Wings. Venation typical for the genus. Forewing crossveins m-cu and cu separate. Sc and R, and Cu2 and A separate before costa. Hind wing Sc and R meeting before costa about at crossvein r. Stem of M and Cu1 run closely. Median cell closed. Fork 1 present. Forewing length 8.0 mm, hind wing length 6.7 mm.

Male genitalia. Abdominal segment IX fused annularly, short. Median keel broad, parallel-sided ( Fig. 123); dorsal surface granulose; lateral surfaces smooth glabrous; keel representing entire dorsum of segment IX, shifted posterad ( Fig. 122); anterior margin arciform, ventrum short, dorsum long ( Fig. 122); antecosta weakly developed, present on margin, slightly narrowing dorsad before margin, with less developed external groove of antecostal suture. Apical lobe on posterolateral margins acutely triangular; shifted dorsad and slightly directed obliquely dorsad ( Fig. 122). Posterior spine row intermittent, present on lower part of median keel slopes, at segment X, and on apical lobes, absent at lower portion immediately above apical lobes. Depression between segments IX and X short, stepwise ( Fig. 122); delineated by distal end of median keel and short, vertical, apicodorsal, setose process. Body of segment X elongate, narrowing in lateral view ( Fig. 122); rounded quadrangular in dorsal view ( Fig. 123). Lateral setose areas (preanal appendages) located ventrally, forming basal compact patch with pale background and scattered distal setae. Apicoventral setose lobes modified into pair of long, slender processes with apical setae; slightly curving ventrad ( Fig. 122); incurving, with mesally tangential apices ( Fig. 123). Dorsal interlobular gap two-partite, wide, almost circular encircled distally by apicoventral setose lobes ( Fig. 123); with shallow, narrow basal incision. Apicodorsal setose lobes forming pair of short, mesal, setose, vertical processes; located near intersegmental depression. Smooth cavity on segment X small, located at basal half of segment X. Ventral part of longitudinal sutures encircling shallow cavity, difficult to discern. Coxopodites exceeding segment X apex, reaching tip of apicoventral setose lobes ( Fig. 122), basal one-third of dorsal margin weakly sinuous, dilating after basal one-third; bending mesad at half-length in ventral view ( Fig. 124). Harpagones each with broad basis ( Fig. 122), strongly bending at halflength ( Fig. 122); distal half filiform; in ventral view bow-shaped, curving posterad, slender along their lengths. Phallic apparatus simply bent, broadening along ventrad-curving basis. Horizontal section of phallotheca almost straight; dorsum slightly concave ( Fig. 125). Endophallus forming well pigmented, narrow tube, slightly broadening basally, reaching phallic apparatus bend. Basis of phallotremal tongue broadening dorsad at basis in lateral view; distal elongation as broad as each apical lobes of phallotheca. Pair of dorsolat-

eral membranous lobes of endotheca slender, long, directed anterad, with short apical spine. Pair of dorsal membranous lobes of endotheca short, covered by short spines.

Holotype male: PHILIPPINES: Mindanao , Mt. Katanglad, 21.ii.2000, light [J. Oláh] ( OPC, alcohol).

Distribution. Philippines (Mindanao).

Etymology. The name of this species is dedicated Dr. Wolfram Mey in recognition of his great contribution in creasing the knowledge of the Trichoptera of the Philippines.