Neochauliodes koreanus Weele

Liu, Xingyue, Hayashi, Fumio & Yang, Ding, 2007, Revision of the Neochauliodes sinensis species-group (Megaloptera: Corydalidae: Chauliodinae), Zootaxa 1511 (1), pp. 29-54 : 38-40

publication ID	https://doi.org/ 10.11646/zootaxa.1511.1.3
DOI	https://doi.org/10.5281/zenodo.5087979
persistent identifier	https://treatment.plazi.org/id/03F187EF-FFDA-DD03-FF46-B306FE92FC67
treatment provided by	Felipe
scientific name	Neochauliodes koreanus Weele
status

Treatment

Neochauliodes koreanus Weele View in CoL

( Figs. 4 View FIGURES 1–9 , 21–23 View FIGURES 21–23 , 41 View FIGURE 41 )

Neochauliodes koreanus Weele, 1909 View in CoL . Notes Leyden Mus. 30: 261. Type locality: Korea (Seoul)?, China (Hongkong).

Diagnosis. Head dark; wings with dark background and wide median transverse, hyaline band. Male tenth sternum slender in lateral view.

Male. Body length 21–25 mm; forewing length 32–35 mm, hindwing length 28–32 mm.

Head dark. Compound eyes brown, ocelli yellow with black inner margin. Antenna dark. Mouthparts pale brown.

Prothorax pale yellow, sometimes dorsally with pair of brownish vittae on lateral margins; meso– and metathorax yellowish brown, dorsally with pair of blackish marks on lateral margins. Legs pale brown with short, dense, yellowish brown setae; tarsal claws pale red. Wings ( Fig. 4 View FIGURES 1–9 ) generally with blackish brown background and hyaline areas; pterostigma short, pale yellow. Forewing blackish brown with broad hyaline areas on proximal and distal 1/3; costal area hyaline, with a brown stripe proximal and distal to pterostigma and with a large brown mark on proximal 1/3. Hindwing similarly marked, proximal half mostly hyaline, hyaline area on distal 1/3 much broader than that of forewing; costal area brown throughout except pterostigma. Veins blackish brown. Rs four–branched, R 2 distally three–branched, R 3 and R 4 distally curved posteriorly; three crossveins between R 1 and Rs; M two–branched; 1A two–branched.

Abdomen brown. Tenth tergum ( Fig. 21 View FIGURES 21–23 ) in lateral view subquadrate with rounded distal margin. Tenth sternum ( Figs. 21–22 View FIGURES 21–23 ) strongly sclerotized; in ventral view slender triangular with tip rounded; in lateral view slender, slightly curved dorsad, with median portion a little wider, tip acutely pointed.

Female. Body length 22–34 mm; forewing length 33–44 mm, hindwing length 30–38 mm.

Eighth sternum subtrapezoidal in lateral view, with distal margin strongly produced posteriorly. Tenth tergum ( Fig. 23 View FIGURES 21–23 ) thick with dorsodistal corner produced posteriorly. Gonocoxite ( Fig. 23 View FIGURES 21–23 ) membranous, foliate with pointed tip, obliquely directed dorsad.

Type material. Lectotype ♀, SOUTH KOREA: Seoul, VIII.1900, H. Scarlett ( NHM) (Doubtful type locality, see the following Remarks).

Other specimens examined. CHINA: ♂ ♀, Guangxi: Lingchuan , Lingtian reservoir, 275 m, 4. VI .1984, D. Yang ( CAU) ; 2 ♀, Guangxi: Lingchuan , Lingtian reservoir, 275 m, 4. VI .1984, F. Li ( CAU) ; 3 ♂, Guangdong: Shixing, Chebaling , 19/ 22.IV.2002, Z. Xu ( CAU) ; VIETNAM: ♀, Tamdao, 18. V .1993, K. Matsumoto ( CAU) ; 1 ♀, Tamdao, V .1993, H. Karube ( CAU) .

Distribution. China (Guangdong, Guangxi, Hongkong); Vietnam (Tamdao); South Korea (Seoul)?

Remarks. This species appears to be closely related to N. robustus sp. nov. in having a similar wing pattern, but the male tenth sternum of N. robustus is broad and thick with the tip slightly incised. Within the N. sinensis species-group, N. koreanus belongs to a group possessing dark wings with some hyaline areas, which is relatively more striking compared with the other Neochauliodes species. After our examination of many South Korean specimens of Neochauliodes and especially those species with dark wings, we did not find any other South Korean specimen with striking darkened wings. All other species in this dark winged group reside in southern or southwestern China. Kimmins (1954) found that one type (the lectotype designated by Kimmins) of this species had two labels (one presents Korea as the collecting locality, but other one presents Hongkong as the collecting locality) and the other type (the paratype designated by Kimmins) was out of label, then he noted that the latter label was wrongly placed to the lectotype and should belong to the paratype; he also mentioned that an additional specimen of N. koreanus in NHM were collected from Hongkong, China. Consequently, the type locality and the distribution of N. koreanus are still obscure. Based on the distributions of its relatives, we feel that the record of this species from Korea is somewhat doubtful. Thus, the Korean record of this species is excluded in the distribution map and following discussion on the zoogeography of the N. sinensis group.