Nemophora umbronitidella Kozlov 2024, sp. nov.
Creators: name: Kozlov, Mikhail V.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Adelidae
Nemophora
Nemophora umbronitidella

description: Nemophora umbronitidella Kozlov, sp. nov.
urn:lsid:zoobank.org:act: 9FAB7629-54B3-4DA0-AEA5-ED6B83500DB4
(Figs. 3, 4, 11, 17, 20)
Holotype ♂: Indonesia, Sumbawa Island (approx. 8º 20’ S, 118º E); labelled: 8 mm circle with red border, print ‘Holo- │ type’; 9 × 13 mm, print + black ink ‘SAMBAWA [=Sumbawa Island], │ 3000‒5500 ft., │ (virgin forest), │ Doherty, 1891. │ No 40729’; 8 × 10 mm, print ‘Walsingham │ Collection │ 1910‒427’; 7 × 17 mm, black frame, black ink ‘Typ │ umbreonitida ♂ │ W │ Named by Wlsm. ’; 9 × 16 mm, print ‘B. M. │ Genitalia slide │ No. 29492’; 6 × 18 mm, print ‘HOLOTYPE ♂ │ Nemophora │ umbronitidella Kozlov’ (NHM) [examined]. Paratypes. 2 ♂, labelled: 8 mm circle with yellow border, print ‘Para- │ type’; 9 × 13 mm, print + black ink ‘SAMBAWA, │ 3000‒5500 ft., │ (virgin forest), │ Doherty, 1891. │ No 40730 [or 40731]’; 8 × 10 mm, print ‘Walsingham │ Collection │ 1910‒427.’; 6 × 18 mm, print ‘PARATYPE ♂ │ Nemophora │ umbronitidella Kozlov’. 1 ♀, labelled: 8 mm circle with yellow border, print ‘Para- │ type’; 9 × 13 mm, print + black ink ‘SAMBAWA, │ 3000‒5500 ft., │ (virgin forest), │ Doherty, 1891. │ No 40732’; 8 × 10 mm, print ‘Walsingham │ Collection │ 1910‒427.’; 7 × 17 mm, black frame, black ink ‘Typ │ umbreonitida ♀ │ W. │ Named by Wlsm.’; 6 × 18 mm, print ‘ PARATYPE ♀ │ Nemophora │ umbronitidella Kozlov’ (all in NHM) [examined].
Diagnosis. Nemophora umbronitidella is most similar to N. timorella, from which it differs by larger size (FWL 5.2‒5.7 mm), an oblique external border of the basal field of forewing, a shorter vinculum, the tip of the tegumen slightly extending beyond the tips of the valvae, a medial protuberance in the fused basal parts of the valvae and an anchor-shaped juxta. It differs from N. longipeniculella (Fig. 7) and N. brevipeniculella (Fig. 8) by the presence of two longitudinal silver stripes with brilliant iridescence in the dark ochreous brown basal field of the forewing.
Description. Male (Fig. 3). FWL 5.2‒5.7 mm, WLR 0.35‒0.37. Vertex pale yellow above antennal sockets to ochreous brown along occipital margin; frons with iridescent silver to light golden scales through which brown colour of head capsule may be visible, and with row of pale ochreous yellow piliform scales below antennal sockets. PLB 0.5 × vertical eye diameter (0.8‒0.9 × length of scape), light brown. Proboscis brown, base densely covered with dark coppery brown semi-erect elongated scales, forming characteristic tuft. Eyes enlarged, occipitally closely approaching, with rounded dorsal margins; interocular index 1.3‒1.4, occipital distance 0.05‒0.07. Antenna 3.7‒4.1 × FWL. Scape yellow, flagellum coppery brown, basal 27‒32 flagellomeres with rings of white scales, which gradually disappear towards apex. Tegulae and thorax dark ochreous brown. Forewing (Fig. 11) bronze, with dark ochreous brown basal field reaching costa at 0.35 and dorsum at 0.30 × FWL, ochreous yellow medial band, and oblique yellow band linking costa with outer wing margin. Basal field with two longitudinal glossy silver stripes with slight brilliant iridescence; lower stripe very narrow. Ochreous yellow medial band with sinuate margins, on both sides bordered by narrow lines of dark brown scales. Bronze background of distal part of forewing suffused with yellow scales. Oblique yellow band linking costa with outer wing margin bordered by narrow line of dark brown scales; at outer margin it expands between veins RS4 and CuA2 and is suffused with brown scales. Some of dark brown scales all over forewing show brilliant iridescence. Fringe bronze. Hindwing brown with coppery iridescence; costal area grey; anal field semitranslucent; fringe brown to light brown. Legs bronze; bases of all tarsomeres white to light yellow. Epiphysis at 0.65, reaching apex of tibia. Abdomen brown with bronze iridescence.
Female (Fig. 4). FWL 5.6 mm. Base of antenna thickened by appressed dark brown scales (distal part of antenna missing). Otherwise similar to male.
Male genitalia (Figs. 17, 20). Tegumen onion-shaped. Socii 1.3 × medial diameter of phallus. Vinculum 2.2 × length of valva, with straight lateral margins and slightly convex distal margin. Tip of tegumen slightly extends beyond tips of valvae. Ventral margin of valva with small lobe at 0.55 × total length; dorsal margin straight; tip of valva narrowly rounded. Valvae fused basally up to 0.4 × total length; internal margins not visible. Fused parts of valvae between ventral margins with distinct triangular protuberance. Anellus 0.2 × length of valva. Transtilla with wide triangular medial process. Juxta 0.55 × length of phallus; arrow head anchor-shaped, extremely wide (WLR 1.1), with widely rounded tip and long pointed lateral arms. Phallus 0.95 × length of vinculum, in lateral view shallowly C-shaped; tip narrow, base widely funnel-shaped.
Distribution. Indonesia, Sumbawa Island.
Etymology. The specific epithet is derived from umbro (Latin: shade) and nitidus (Latin: bright, shining) and refers to the diagnostic trait of this species.
Comments. Although Walsingham clearly labelled one male and one female as types of a proposed new species, he never published its description.
description: Published as part of Kozlov, Mikhail V., 2024, Description of six new species forming the sumbana species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Lesser Sunda Islands in Indonesia, pp. 111-122 in Zootaxa 5543 (1) on pages 116-117, DOI: 10.11646/zootaxa.5543.1.6, http://zenodo.org/record/14385298