Mongoloraphidia lini, Liu & Lyu & Aspöck & Aspöck, 2018

Liu, Xingyue, Lyu, Yanan, Aspöck, Horst & Aspöck, Ulrike, 2018, New species of the snakefly genus Mongoloraphidia (Raphidioptera: Raphidiidae) from China, Zootaxa 4527 (1), pp. 87-96 : 88-90

Mongoloraphidia lini sp. nov.

( Figs. 1–6 )

Diagnosis. Pterostigma distinctly bicolored (proximal half pale brown, distal half pale yellow), about half length of the first poststigmal cell. Body in general black except for dark brown and slightly patterned pronotum; pregenital segments of abdomen with a pair of yellowish vittae laterally, each sternum posteriorly with a yellow transverse stripe; male gonocoxite 9 with a claw-like process that is nearly equal in length to gonostylus 9; male gonostylus 9 strongly curved dorsomedially; male gonapophyses 9 (hypovalva) present as a pair of slenderly elongate lobes.

Description. Male. Body length 8.0 mm; forewing length 8.0 mm, hindwing length 7.2 mm.

Head ovoid, posteriorly tapering feebly, black, with clypeus reddish brown. Compound eyes grayish black. Antennal sclerite black; antennae yellow, but flagellum blackish brown on distal half. Mouthparts yellow, but distal half of mandibles, maxillary and labial palps dark brown.

Pronotum long, slender, dark brown, anterior half medially with a yellowish brown longitudinal stripe that is slightly extended laterally on posterior end, posterior half with three yellowish brown longitudinal stripes; meso- and metathorax black, mesonotum with prescutum and scutellum yellow, metanotum with only scutellum yellow. Legs yellow with blackish brown setae, tarsomeres 3-5 slightly darker. Wings hyaline; pterostigma short, approximately 2.5 times as long as wide, crossed by a veinlet at middle, pale brown on proximal part but pale yellow on distal part; veins blackish brown, proximal half of C and R on forewings and bases of most longitudinal veins on hindwings yellow. Anterior branch of forewing RP with three branches, two or three of them distally forked; anterior branch of hindwing RP with one branch simple and one distally forked.

Abdomen black; all pregenital segments with a pair of yellowish vittae laterally, each sternum posteriorly with a yellow transverse stripe; genital segments pale yellowish brown except for gonocoxites 9 brown.

Tergum 9 laterally markedly flexed, anterior margin slightly notched. Sternum 9 arcuate, rather narrow, and broadly concaved posteriad. Gonocoxite 9 obliquely directed dorsoventrally; dorsal part slightly broader than ventral part; ventral part posteriorly with a claw-like process, which is slightly curved medially. Gonostylus 9 slightly longer than process of gonocoxite 9, claw-like, and strongly curved dorsomedially. Gonapophyses 9 (hypovalva) as a pair of slenderly elongate lobes, nearly equal in length to tergum 9 plus ectoproct, slightly curved ventrad at tip; in ventral view anterior parts laterally curved with truncate bases, posterior half slightly widened but narrowed again on apex, dorsal surface bearing membrane. Ectoproct nearly as long as tergum 9, with large portion feebly sclerotized, and with posterodorsal corner pointed in lateral view; a simple row of trichobothria present. Fused gonocoxites 11 (gonarcus) small, in caudal view ovoid, with strongly sclerotized outer margin and median ridge, which is also strongly sclerotized along internal extension. Endophallus feebly developed. Hypandrium internum trilobate, lateral lobes slightly wider but shorter than median lobe, posterior end strongly narrowed.

Female. Unknown.

Type material. Holotype 6, CHINA: Sichuan, Ya-an, Hanyuan, Entrance of Chamagudao , 29.60046°N, 102.619487°E, 1922 m, 9.VI.2015, Yejie Lin ( CAU).

Distribution. China (Sichuan).

Etymology. The name of the new species is in dedication to Mr. Yejie Lin, who collected and kindly provided the type specimen of this new species.

Remarks. The new species appears to be closely related to Mongoloraphidia (Formosoraphidia) caelebs H. Aspöck, U. Aspöck & Rausch, 1985 , from Taiwan in having similar slenderly elongate hypovalva, but it can be distinguished from the latter species by the male gonocoxite 9 with a shorter process, the strongly curved male gonostylus 9, and the hypovalva without long setae. In M. (F.) caelebs the process on male gonocoxite 9 is much longer than gonostylus 9, the gonostylus 9 is only curved at tip, and there are several long setae on hypovalva (see H. Aspöck et al. 1991: figs. 1109, 1110).

Figures

FIGURE 1. Habitus of Mongoloraphidia lini sp. nov., holotype male. A: anal; C: costa; CuA: cubitus anterior; CuP: cubitus posterior; MA: media anterior; MP: media posterior; RA: radius anterior; RP: radius posterior; ScP: subcosta posterior. Scale bar = 1.0 mm.

FIGURES 2–6. Mongoloraphidia lini sp. nov. 2. Male genital segments, lateral view; 3. Male genital segments, ventral view; 4. Hypandrium internum, lateral view; 5. Hypandrium internum, ventral view; 6. Fused gonocoxites 11 (gonarcus), caudal view. e: ectoproct; gp9: gonapophysis 9 (hypovalva); gst9: gonostylus 9; gx9: gonocoxite 9; gx11: fused gonocoxites 11 (gonarcus); S8, 9: sternum 8 and 9; T8, 9: tergum 8 and 9. Scale bar = 0.5 mm.