Neochauliodes guixianus, Jiang, Wei, Wang, Guoquan & Liu, Xingyue, 2012

Jiang, Wei, Wang, Guoquan & Liu, Xingyue, 2012, New fishfly species of the Neochauliodes bowringi group (Megaloptera: Corydalidae: Chauliodinae), Zootaxa 3230, pp. 59-64 : 61-63

Neochauliodes guixianus sp. nov.

( Figs. 2 , 5–6 , 8 )

Description. Male. Body length 21.3 mm; forewing length 32.6–37.7 mm, hindwing length 29.4–34.4 mm.

Head dark brown, with clypeus black posteriorly. Compound eyes brown; ocelli yellow, medially margined black. Antennae blackish brown. Mouthparts blackish brown; mandibles blackish brown with distal 1/3 reddish brown.

Thorax dark brown, pronotum anteriorly with a triangular yellow marking. Legs dark brown with short, dense, brown setae; femora dorsally with a longitudinal yellowish stripe extending from base to subapical portion, tarsal claws reddish brown. Wings hyaline, slightly tinged with smoky brown; pterostigmatic area short, whitish. Forewing with a few brown spots, which are mostly connecting to others along costal crossveins, on proximal half of costal area, and respectively with a long and a short brown stripe beside pterostigmatic area; wing base also with a few brown spots along bases of Rs, M, and Cu; median portion with a broadly band-like but faintly brown marking extending to Cu; distal portion with a few faintly brown spots along branches of Rs, MA, and MP. Hindwing immaculate proximally, medially with a broad band-like brown marking extending from costal area to anterior branch of MP, and distally with a few faintly brown spots along branches of Rs, MA and MP. Veins dark brown. Rs 5 to 6-branched, feebly curved posteriad; three crossveins between R and Rs.

Abdomen blackish brown. Ninth tergum ( Fig. 5 ) narrowed and produced anteroventrad in lateral view. Ectoproct ( Figs. 5–6 ) in lateral view subquadrate, with round posterodorsal and posteroventral corners; in dorsal view distal half globally inflated, bearing rows of brushy setae. Tenth gonocoxite ( Figs. 5 , 8 ) strongly sclerotized, lateral arms subtriangular in ventral view, connected with median plate by narrow protrusions; median plate narrowly elongate, and blade-shaped in ventral view, anteriorly slightly concaved, lateral margins medially extending anterolaterally; median plate in lateral view straightly directed, medially broadened due to ventrally elevated lateral margins and dorsally inflated median portion, with subdistal portion also broadened dorsad.

Female. Unknown.

Type material. Holotype 3, CHINA: Guangxi Province, Tianlin, Langping [24°29’N, 106°21’E], 1200 m, 14.VI.1981, Zhuyin Wang ( GAAS). Paratypes 13, CHINA: Guangxi Province, Tianlin, Langpingshan, 1100 m, 13.VI.1981, Zhuyin Wang ( GAAS); 13, CHINA: Guangxi Province, Leye, Xinhua [24°39’N, 106°35’E], 16.VII.1980, Sheyuan Yao ( GAAS).

Distribution. China (Guangxi).

Etymology. The specific epithet ‘ guixianus ’ refers to the distribution of the new species currently restricted to the western part of Guangxi (simply called Guixi in Chinese).

Remarks. The new species seems to be closely related to N. tonkinensis based on the similar male ectoprocts and tenth gonocoxite (a flattened plate with median portion broadened in lateral view), but it can be distinguished from the latter species by the forewings having the proximal dark spots mostly fused with adjacent ones on the costal areas and by the rather narrow male tenth gonocoxite. In N. tonkinensis the proximal dark spots on costal areas of the forewings are small and isolated with each other and the male tenth gonocoxite is much broader than that of the new species ( Fig. 11 ).

Figures

FIGURES 1 – 2. Habitus images of Neochauliodes spp. 1. N. cambodianus sp. nov., holotype male; 2. N. guixianus sp. nov., holotype male. Scale bars = 5.0 mm.

FIGURES 3 – 6. Male genitalia of Neochauliodes spp. 3. N. cambodianus sp. nov., genitalia, lateral view; 4. same, ectoproct, dorsal view; 5. N. guixianus sp. nov., genitalia, lateral view; 6. same, ectoproct, dorsal view. Scale bars = 1.0 mm.

FIGURES 7 – 11. Male tenth gonocoxites of Neochauliodes spp. 7. N. cambodianus sp. nov., ventral view; 8. N. guixianus sp. nov., ventral view; 9. N. bowringi (McLachlan), ventral view; 10. N. moriutii Asahina, ventral view; 11. N. tonkinensis (van der Weele), ventral view. Scale bars = 1.0 mm.