Nemophora bistrigata Kozlov, sp. nov.
Creators: name: Kozlov, Mikhail V.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Adelidae
Nemophora
Nemophora bistrigata

description: Nemophora bistrigata Kozlov, sp. nov.
(Figs. 5, 14, 16, 33–37)
Holotype ♂: Indonesia, New Guinea, Irian Jaya, Jayapura (2o35'S, 140o42'E); labelled: 8 mm circle with red margin, print ‘Holo- | type’; 9 × 13 mm, black ink + print ‘ Humboldt Bay [Yos Sudarso Bay] | New Guinea | Doherty, 1892 | 41725’; 7 × 10 mm, print ‘ Walsingham | Collection. | 1910-427.’; 13 × 20 mm, pencil ‘ bistrigata | ♂. type’; 12 × 12 mm, print ‘B. M. ♂ | Genitalia Slide | No. 27824’; 8 × 18 mm, print ‘ HOLOTYPE ♂ | Nemophora | bistrigata Kozlov’ (NHM).
Diagnosis. Externally similar to N. dohertyi, from which differs by smaller size, bent oblique stripe in apical part of forewing (straight in N. dohertyi), and very small male genitalia (total length 0.48 mm vs. 1.10 mm in N. dohertyi) with short vinculum, the length of which approximately equals to width (2 × its width in N. dohertyi).
Etymology. From striga (Latin)—swath; bistrigata, with two stripes.
Description. Male (Fig. 5, 14). FWL 4.3 mm; WLR 0.37. Vertex with sparse row of brown piliform scales along occipital margin; frons brownish grey. Eyes enlarged, touching each other occipitally; interocular index 1.2. PLB 0.7 × vertical eye diameter and 0.75 × scape, dark brown. Antenna 2.8 × FWL. Scape and 3–5 basal segments of flagellum bronze; the following flagellar segments light grey to white, with brown marks on ventral side; distal half of flagellum light grey to white. Tegula and thorax dark brown. Forewing light brown; basal part densely suffused with dark brown scales and sparsely scattered with white to light yellow scales; the highest concentration of these light scales occurs near the costal margin at about 0.5 × FWL. Oblique stripe in the apical part of forewing is bent medially and reaches external wing margin; this ochreous stripe on both sides is bordered by narrow lines of dark brown scales. Ochreous elongate spot surrounding wing apex between veins RS1 and M1 internally bordered by dark brown scales; wing area between the oblique stripe and the apical spot dark silver grey. Fringe brown. Hindwing light brown; fringe greyish brown. Legs brown, apical parts of all tibia and tarsomeres white. Epiphysis at 0.6, reaching tip of tibia. Abdomen brown.
Female unknown.
Male genitalia (Figs. 33–37). Extremely small and oversimplified, with no suture between vinculum and valvae; this makes taking many measurements impossible. Tegumen dome-shaped, wide. Socius 0.8 × diameter of phallus. Vinculum with straight lateral margins, triangular in ventral view, narrowly rounded basally; distal margin of vinculum indistinct, fused to valvae. Apex of valva extends far beyond the apex of tegumen. Margins of valva straight; apex of valva widely rounded. Anellus extremely short. Transtilla with small wide triangular medial process. Juxta 0.6 × length of phallus, without arrow-head. Phallus slightly shorter than vinculum, straight, without any visible structures either basally or apically.
Distribution (Fig. 9). Indonesia (Irian Jaya).
Comments. The holotype is worn, crashed and glued; therefore some characters (e.g. leg colour and length of the epiphysis) could not be investigated. However, the male genitalia, although they look unusual, were intact, and I exclude the possibility that either juxta or plallus were broken: they are rather proportional, and the shape of juxta in N. bistrigata represents the next stage of the reduction of the arrow-head relative to N. humerella and N. dohertyi. The fused valva and vinculum occurs in several other exotic species of Nemophora, which are not yet described. Combined with clear differences in wing pattern, these diagnostic characters justify species’ description. The species’ name was proposed by Walsingham who labelled the holotype but never published the description.
description: Published as part of Kozlov, Mikhail V., 2016, A taxonomic revision of the kalshoveni species-group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae), with descriptions of six new species from Indonesia and Papua New Guinea, pp. 559-570 in Zootaxa 4189 (3) on page 568, DOI: 10.11646/zootaxa.4189.3.6, http://zenodo.org/record/166209