Eugenys micra, 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 : 85-89

Eugenys micra sp. nov.

urn:lsid:zoobank.org:act:DDCD52D2-BE5D-4E0F-B3DC-BABEF28BEFDB

Figs 1 , 3E , 4 , 5A

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 in the remaining species); antennal flagellomeres without patch of darkened sensilla (present in E. upsilon sp. nov. and E. panamensis , absent in remaining species); aedeagus less than half length of ejaculatory apodeme (aedeagus long, more than half length of ejaculatory apodeme in E. clavellata ).

Etymology

The speciphic epithet ‘ micra ’ is derived from the Greek ‘ mīkrós ’ (feminine ‘ mikrí’), referring to the small size of the aedeagus of the species.

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-DIP-00097917 ; INABIO.

Paratypes COSTA RICA – Limon • 1 ♂; Hitoy-Cerere Biological Reserve ; 9.80666° N, - 83.02500° E; alt. 100– 200 m; 17–26 Feb. 1999; L.W. Quate leg.; INBIO-CRI001472882 ; LACM • 1 ♂; same collection data as for preceding; INBIO-CRI001472884 ; INBIO • 1 ♂; same collection data as for preceding; INBIO-CRI001472896 ; INBIO .

Description

Male (holotype)

MEASUREMENTS (in mm). Wing length 1.08, width 0.90; head length 0.17, width 0.45; antennal segments, scape 0.09, pedicel 0.06, flagellomeres 1–3: 0.10; palpal segments 1: 0.03, 2: 0.06, 3: 0.05, 4: 0.03.

HEAD. About 2 × as wide as long; eye bridge contiguous, eye bridge with three facet rows; no enlarged alveoli on postocular area ( Fig. 4A ); interocular suture appears absent. Antenna with scape about same width as its length, asymmetrical; pedicel spherical, about same width as its length; flagellomeres posterior to 4 lost in all examined specimens, 1–4 fusiform, flagellomeres without darkened patch of sensilla; ascoids absent in examined material; frontal alveoli patch quadrate; mouthparts reduced, not extending beyond margin of head. Palpal segments short and sclerotized, apical segment not corrugated; not extending more than half of flagellomere 2, palpal proportions 1.0:2.0:1.6:1.0.

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

TERMINALIA ( Fig. 4E–G ). Hypandrium very narrow, plat-like, and V-shaped; gonocoxites about same length as gonostyli, longer than wide, gonocoxites joining in middle, and together giving origin to semi-sclerotized parameral sheath protruding beyond aedeagus, covering aedeagus only on dorsal surface (see Figs 3E , 4E, G ); gonostyli narrow, outwardly curved; ejaculatory apodeme about 3 × as long as aedeagus, narrow but broadening towards anterior end, aedeagus curved, with claw-shaped and heavily sclerotized paramere; aedeagal sclerites apparently absent; epandrium about 4 × as wide as long, concave on posterior margin; hypopods elongate, longer than epandrium, curved and tapering towards apex, apex of hypopods with single tenaculum with crowned apex. Epiproct very wide, tongue-shaped with rounded margin, whole surface covered in small setulae.

Female

Unknown.

Distribution

Costa Rica and Ecuador.

Genetics

The holotype was successfully sequenced for COI, GenBank accession number OQ706370.

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. 4. Eugenys micra sp. nov., ♂, holotype (ZFMK-DIP-00097917). A. Head. B. Wing. C. Mouth parts. D. Scape, pedicel and first two flagellomeres. E. Aedeagus (ventral view). F. Epandrium and hypopods (ventral view). G. Aedeagus, gonocoxites, and gonostyli (ventral view). Scales in millimeters (mm). Abbreviations: see Material and methods.

Fig. 5. Male genitalia, ventral view. A. Eugenys micra sp. nov., holotype (ZFMK-DIP-00097917). B. Eugenys panamensis Quate, 1999, paratype (BMNH(E)-2001-8). Scales in millimeters (mm). Abbreviations: see Material and methods.