Eugenys upsilon, Jaume-Schinkel & Kvifte, 2024

Jaume-Schinkel, Santiago & Kvifte, Gunnar Mikalsen, 2024, Revision of the genus Eugenys Quate, 1996 (Diptera: Psychodidae), with the description of three new species, European Journal of Taxonomy 935, pp. 81-100 : 93-97

Eugenys upsilon sp. nov.

urn:lsid:zoobank.org:act:56AB3A46-1F40-471F-B126-5C667FA33B48

Figs 1 , 3D , 7–8

Differential diagnosis

This species can be easily differentiated from all other species of Eugenys by the following characters: hypopods with singular apical tenaculum (10–14 present in E. singularis sp. nov. and E. cymosa , one apical tenaculum in E. micra sp. nov., E. panamensis and E. upsilon sp. nov.); antennal flagellomeres with patch of darkened sensilla (present in E. panamensis , absent in remaining species); aedeagus curved, without distinguishable paramere (aedeagus straight, with distinguishable paramere in E. panamensis ).

Etymology

The species epithet is derived from the Greek letter ‘ύψιλον’ (‘ýpsilon’), referring to the Y- to U-shaped parameral sclerite.

Material examined

Holotype ECUADOR – Pichincha • ♂; Pedro Vicente Maldonado, Parroquia Pedro Vicente Maldonato , Roadway to Pachijal ; 0.11882° N, 78.95802° W; alt. 750 m; 1–9 Feb. 2022; I. Kilian leg.; ZFMK-TIS-2637135 ; ZFMK-DIP-00097918 ; INABIO.

Paratypes ECUADOR • 1 ♂; same collection data as for holotype; ZFMK-TIS-2637099 ; ZFMK-DIP-00097913 ; INABIO • 1 ♂; same collection data as for holotype; ZFMK-TIS-2637105 ; ZFMK-DIP-00097914 ; ZFMK • 1 ♂; same collection data as for holotype; ZFMK-TIS-2637111 ; ZFMK-DIP-00097915 ; ZFMK • 1 ♂; same collection data as for holotype; ZFMK-TIS-2637140 ; ZFMK-DIP-00097919 ; ZFMK • 1 ♂; same collection data as for holotype; ZFMK-TIS-2637141 ; ZFMK-DIP-00097920 ; ZFMK • 1 ♂; same collection data as for holotype; ZFMK-TIS-2637144 ; ZFMK-DIP-00097921 ; ZFMK • 1 ♀; same collection data as for holotype; ZFMK-TIS-2637123 ; ZFMK-DIP-00097916 ; ZFMK .

Description

Male

MEASUREMENTS (in mm; n = 7). Wing length 3.04 (2.8–3.4), width 1.53 (1.3–1.63); head length 0.53 (0.56–0.50), width 0.63 (0.66–0.60); antennal segments, scape 0.13, pedicel 0.08, flagellomeres 1: 0.11, 2–12: 0.10, 13:0.11, 14: 0.36; palpal segments 1: 0.05, 2: 0.01, 3: 0.08, 4: 0.05.

HEAD (holotype). Wider than long; eye bridge contiguous, eye bridge with two facet rows on narrowest part and three facet rows on remaining part of bridge; no enlarged alveoli on postocular area; interocular suture appears absent ( Fig. 7A ). Antenna with scape wider than long, asymmetrical; pedicel spherical, about 2 × as wide as long; 14 flagellomeres, 1–13 fusiform, flagellomere 14 elongated, 3 × as long as previous flagellomere, ending in digitiform apiculus, flagellomeres with patch of darkened sensilla; ascoids very long, at least length of three flagellomeres, rod-like and with zigzag shape; frontal alveoli patch egg-shaped; mouthparts reduced, not extending beyond margin of head. Palpal segments short and sclerotized, apical segment not corrugated; not extending more than half of flagellomere 4, palpal proportions 1.0:2.0:1.6:1.0.

THORAX. Without allurement organs; wing length about 2 × its width, hyaline, with alveoli in whole surface ( Fig. 7B ); Sc vein almost straight, ending at origin of R 5, fork of R 2+3 basal to M 1+2, R 2+3 joining R 4, wing apex rounded, R5 ending slightly below apex.

TERMINALIA. Hypandrium narrow, plate-like, and rounded, Gonocoxites about half length of gonostyli, about as wide as long, gonocoxites joined in middle, and together giving origin to semi-sclerotized parameral sheath protruding beyond aedeagus, covering aedeagus only on sternal surface ( Figs 3D , 7F, H ); gonostyli narrow, outwardly curved; ejaculatory apodeme slightly longer than aedeagus, narrow but broadening towards basal margin, aedeagus curved in ventral view, and claw-shaped in lateral view, aedeagus with heavily sclerotized lump at base, which in lateral view extends towards dorsal surface ( Fig. 7E ); parameral sclerite forming single Y-shaped sclerotized structure, linked to aedeagal sheath and aedeagus; epandrium about 4 × as wide as long; hypopods elongate, longer than epandrium, tapering towards apex, apex of hypopods with single tenaculum with crowned apex. Epiproct tongue-shaped with rounded margin, covered in small setulae.

Female

Same as male except for palpi consisting of three segments; terminal flagellomeres absent in material examined; maximum number of flagellomeres present: 6. Mouthparts slightly more developed than in male, mouthparts with teeth-like sclerotized structures ( Fig. 8C ).

Distribution

Only known from the type locality in Ecuador.

Genetics

All specimens examined were successfully sequenced.All sequences are identical. Genebank’s accession numbers are OQ706367, OQ706373, OQ706374, OQ706368, OQ706372, OQ706366, OQ706371, OQ706369.

Figures

Fig. 1. Distribution map of the species of Eugenys Quate, 1996.

Fig. 3. Male genitalia, ventral view. A. Eugenys cymosa Quate, 1999, paratype (BMNH(E)2001-8). B. Eugenys panamensis Quate, 1999, paratype (BMNH(E)-2001-8). C. Eugenys clavellata Quate, 1996, paratype (USNMENT00857092). D. Eugenys upsilon sp. nov., holotype (ZFMK-DIP-00097918). E. Eugenys micra sp. nov., holotype (ZFMK-DIP-00097917). F. Eugenis singularis sp. nov., holotype (INBIO-CRI001470242). Red arrows point to the parameral sclerites. Photos: A–B, D–F by Santiago Jaume-Schinkel, C by David Pecor, Smithsonian Institute Museum. Scales in millimeters (mm).

Fig. 7. Eugenys upsilon sp. nov. A. ♂, paratype (ZFMK-DIP-00097921), head. B. ♂, paratype (ZFMK- DIP-00097914), wing. C. ♂, paratype (ZFMK-DIP-00097921), mouth parts. D. ♂, paratype (ZFMK- DIP-00097921), first antennal segments. E–H. ♂, holotype (ZFMK-DIP-00097918). E. Aedeagus (lateral view). F. Aedeagus (ventral view). G. Epandrium and hypopods (ventral view). H. Aedeagus, gonocoxites, and gonostyli (ventral view). Scales in millimeters (mm). Abbreviations: see Material and methods.

Fig. 8. Eugenys upsilon sp. nov., ♀, paratype (ZFMK-DIP-00097916). A. Head. B. Wing. C. Mouth parts. D. Genitalia (ventral view). Scales in millimeters (mm).