Xanthostigma Navás, 1909

Wu, Zhigang & Liu, Xingyue, 2016, The species of the snakefly genus Xanthostigma (Raphidioptera: Raphidiidae) from China, Zoological Systematics 41 (1), pp. 109-116 : 109-111

Xanthostigma Navás, 1909

Xanthostigma Navás, 1909: 145 . Type species: Raphidia xanthostigma Schummel, 1832: 12 (absolute tautonomy).

Raphidilla Navás, 1915: 477 . Type species: Raphidia xanthostigma Schummel, 1832: 12 (original designation).

Rhaphidilla Navás, [1918-1919] 1917: 49. An unjustified emendation of Raphidilla Navás, 1915 .

Generic diagnosis. Snakeflies of medium-sized (male forewing length 7.5 mm on average). Head ovoid, posteriorly tapering, black, slightly shiny. Pronotum slender, nearly as long as head. Wings transparent, pterostigma elongate, about 3.0 times as long as wide, unicolored. Forewing Rs distally with 3–4 branches; MA mostly bifurcated; MA with 4 distal forks. Abdomen dark, with yellowish markings. Male tergite 9 much longer than tergite 8; sternite 9 paired as tiny sclerites; gonocoxite 9 broad, posteriorly directed; gonostylus 9 slenderly elongate, terminally usually forked; hypovalva generally slenderly elongate; parameres and gonarcus feebly developed; ectoproct broad, strongly broadened posteriad and expanded ventrad. Female bursa copulatrix with glandulae receptaculi bearing bulbs on each short thread-like stalk.

Distribution. Widely distributed in Palaearctic Region.