Thyridosmylus longiprocessus Xu, Wang & Winterton

Xu, Han, Winterton, Shaun L., Wang, Yongjie & Liu, Zhiqi, 2017, Two new species of Thyridosmylus Krueger, 1913 from Madagascar (Neuroptera, Osmylidae), ZooKeys 724, pp. 43-52 : 46-50

Thyridosmylus longiprocessus Xu, Wang & Winterton sp. n. Figs 3, 4

Diagnosis.

Frons brown with two dark brown markings; forewing hyaline, basal half with two brown stripes; male genitalia with ectoproct bearing a long dorsal rod-like process; distal part of gonarcus with abundant pilosity; basal part of mediuncus laterally with heart-shaped structures in dorsal view; spermatheca complex, with 13 sacs, basal one small and oval.

Description.

Head. Vertex brown with black setae; compound eyes grey, ocelli yellow, base edged with a dark brown spot. Antennal flagellum yellow; scape and pedicel brown; frons brown with two dark brown markings. Thorax. Pronotum black; meso- and metanotum brown with a longitudinal dark stripe in middle. Legs. Legs yellow with brown setae; claws brown. Wings (Fig. 3). Forewing length 17-18 mm, width 5-6 mm; membrane hyaline, basal half with 10 brown spots forming two stripes; veins brown; pterostigma light brown; Rs with 12 branches, cross-veins among Rs branches forming two series of gradates, outer gradate cross-veins edged with brown spots; forewing M branching more basally than the divergence of basal branch of Rs; nygmata clear, distal nygma edged with a rounded light brown spot. Hindwing length 15-16 mm, width 4-5 mm; membrane hyaline; veins brown; pterostigma light brown. Rs with 12 branches, cross-veins among Rs branches forming two series of gradates. Basal MP with a spur. Male genitalia (Fig. 4 a–g). Tergite 8 and sternite 8 quadrangular with brown setae; tergite 9 narrow; sternite 9 quadrangular; ectoproct with a long dorsal rod-like process (Fig. 4a); callus cercus approximately oval; gonarcus approximately triangular in lateral view and narrow and arched in dorsal view; gonarcus membranous posterolaterally with dense setal pile, dorsal margin well sclerotized (Fig. 4 b–c); entoprocessus narrow, bent dorsad, with a posteroventral pointed projection, distal region membranous (Fig. 4b); mediuncus lobes C-shaped in lateral view (Fig. 4d), basally thickened and well sclerotized, distal part translucent and expanding dorsal-medially and ventrally; basal part laterally with heart-shaped structures in dorsal view (Fig. 4e); parameres sclerotized, horn-shaped in dorsal view, thickened medially and bent in lateral view (Fig. 4 f–g). Female genitalia (Fig. 4 h–i). Tergite 8 quadrate, sternite 8 reduced, close to tergite 9; tergite 9 narrow and constricted at the level of ventral margin of ectoproct; gonopophyses 9 and gonocoxite 9 closely associated, gonocoxite 9 finger-like with gonostylus 9 distally; ectoproct coniform, callus cercus rounded; spermathecae complex, each comprised of 13 sacs, basal sac small and oval (Fig. 4i).

Material examined.

Holotype. Male. MADAGASCAR: Fianarantsoa Prov., S. E. Fandriana Korikory, elev. 1670 m, 20°23'S, 47°40'E, 13.iii.2002, coll. Michael E. Irwin & Evert I. Schlinger (CASC). Paratype. Female. Data same as holotype.

Etymology.

Thve specific name " longiprocessus ", a compound from Latin longi- (long) and processus- (process), which refers to the long dorsal process of ectoproct in male.

Distribution.

Madagascar (Fianarantsoa).

Remarks.

The male genitalia are not well sclerotized probably because it was teneral when it was collected. The sternite 8 in T. longiprocessus sp. n. is reduced into a sclerite without processes and the spermatheca is complex, consisting of 13 sacs, of which, the basal one is small and oval. Moreover, the dorsal process of ectoproct in male is quite long, clearly distinguished from other Thyridosmylus species, in which it is inconspicuous when it is observed in lateral view.