Neochauliodes borneensis van der Weele, 1909

Liu, Xingyue, Dvořák, Libor & Constant, Jérôme, 2022, First record of the order Megaloptera Latreille from the Philippines, Zootaxa 5138 (5), pp. 584-590 : 585-586

Neochauliodes borneensis van der Weele, 1909

( Figs 1–10 )

Neochauliodes sundaicus borneensis van der Weele, 1909: 261 . Type locality: Indonesia (Mahakkam).

Diagnosis. Small-sized fishflies (forewing length 21–22 mm in males, 24–31 mm in females). Head yellow, vertex sometimes with brownish or blackish markings on median or lateral portions. Ocelli medially margined black. Antenna black except for scape and pedicel yellow. Mouthparts yellow, mandibles with distal half black. Pronotum yellow, laterally with two pairs of broad blackish markings, posteromedially sometimes also with a blackish marking; meso- and metanota yellow, each with a pair of blackish markings laterally. Legs yellow, but tarsi slightly darkened distad. Wings ovoid, slightly narrower and longer in females. Forewing with pale grayish brown markings, some of which near wing base are much darker; markings on crossveins among RP+MA, MP, CuA, and CuP arranged as a transverse band; markings on distal half mostly gathered around distal two series of crossveins, leaving two broad transparent areas on either side of distal nygma. Hindwing mostly immaculate, sometimes with grayish dots on nygmata. Male genitalia: Tergum 9 strongly arched, with posterior margin arcuately concave medially in lateral view; in dorsal view posterior margin with a small median incision. Ectoproct laterally broad, with posterodorsal corner acutely tapered dorsad and with posteroventral corner produced ventrad into a short subtriangular process; in dorsal view acutely pointed and slightly curved medially at tip, with rows of brushy setae on inner portion. Fused gonocoxites 10 obliquely directed dorsad, with distal 1/3 rather narrowed in lateral view; in ventral view median plate rather slender, strongly narrowed distad with rounded tip. Female genitalia: Fused gonocoxites 8 in ventral view broad, slightly narrowed posteriad, medially depressed longitudinally, laterally with a pair of narrowly elongate sclerites. Ectoproct short and stout, with posterodorsal corner strongly produced in lateral view. Gonocoxite 9 broadly valvate, with distal margin truncate.

Supplementary description. Specimen from Palawan. Female. Body length 16.3 mm; forewing length 24.2 mm, hindwing length 22.1 mm. Head with a pair of blackish markings posterolaterally, and with a blackish stripe medially. Left forewing with distal half damaged. Forewing markings mostly distinct and isolated from each other. Stem and proximal half of two main branches of forewing MP brown. Four forewing radial crossveins present.

Specimen from Mindanao. Female. Body length 17.0 mm; forewing length 31.0 mm, hindwing length 27.0 mm. Head with a pair of blackish markings posterolaterally, and with a blackish stripe medially. Wings partly damaged. Forewing markings much fewer, but mostly distinct and isolated from each other. Stem and proximal half of two main branches of forewing MP pale yellow. Five or six forewing radial crossveins present.

Materials examined. 1♀, the Philippines SW., Palawan, 5 km E[ast] of Port Barton , 10°22.581′N, 119°11.091′E, 110 m, 13/14.XII.2007, leg. J.H. Lourens ( RBINS) ; 1♀, the Philippines, Mindanao, Zamboanga Del Norte, Siocon [7°42′N, 122°8′E, 7 m], IV.2019, leg. Ismail Lumawig and the team ( LDPC) .

Distribution. Indonesia (East Kalimantan); Malaysia (Sabah); the Philippines (Mindanao, Palawan) ( Fig. 10 ).

Figures

FIGURE 1. Neochauliodes borneensis van der Weele, 1909, female from Palawan, the Philippines. Scale bar: 5.0 mm.

FIGURE 2. Neochauliodes borneensis van der Weele, 1909, female from Mindanao, the Philippines. Scale bar: 5.0 mm.

FIGURES 3–6. Head and pronotum of Neochauliodes borneensis van der Weele, 1909. 3. Female from Palawan, the Philippines; 4. Female from Mindanao, the Philippines; 5. Female from Borneo; 6. Female from Borneo. Scale bar: 5.0 mm.

FIGURES 7–9. Neochauliodes borneensis van der Weele, 1909, female from Palawan, the Philippines. 7. Female genitalia, dorsal view; 8. Same, ventral view; 9. Same lateral view. e: ectoproct; gx: gonocoxite; T: tergum. Scale bar: 1.0 mm.

FIGURE 10. Distribution map of Neochauliodes borneensis van der Weele, 1909. Circle indicates distribution record from Borneo; star indicates distribution record from the Philippines.