Eloeophila hadrophallus Kato, 2021

Kato, Daichi, 2021, Taxonomic study of the genus Eloeophila Rondani, 1856 of Japan (Limoniidae Diptera), Zootaxa 4995 (3), pp. 425-451 : 435-437

Eloeophila hadrophallus Kato , sp. nov.

( Figs 6A–G , 13D )

Diagnosis. Grey and dark brown species with heavily spotted wing. Prescutum ocherous grey, mottled with dark markings. Wing with numerous tiny spots and six large spots at anterior margin. Veins at wing margin and all crossveins with dark markings. Legs generally yellow, femora with dark band at tip, extreme tips slightly yellowish, tips of tibiae narrowly dark. Halter shorter than thorax, pale yellow, knob dark brown. Outer gonostylus dorsoventrally flattened, outer margin with small lobe at distal 1/3. Distal 1/3 of outer gonostylus claw-shaped, outer margin serrate, inner margin weakly undulate. Mesal-apical lobe of paramere about 3.5 times as long as wide. Aedeagus stout, about 2.5 times as long as wide in lateral view.

Type material. HOLOTYPE male, JAPAN, Nansei Islands, Kagoshima, Amami Is, Yamato-son , Yuwangama , Alt. 250 m, 31.III.2019, D. Kato ( BLKU) . PARATYPES: JAPAN: [Nansei Islands] Amami Is : 2 males, same data as holotype .

Description. Male. General coloration grey and dark brown ( Fig. 6A ). Head. Grey dorsally, sometimes tinged with ocherous, and dark brown ventrally. Vertex with longitudinal dark stripe at middle; lateral side of posterior part of vertex with dark spot. Antenna 2.5 times as long as head. Scape dark grey. Pedicel brown. Flagellum pale yellow. Flagellomeres oval, longer in distal segments; ventral sides of basal three flagellomeres distinctly produced ventrally. Rostrum and palpus dark brown.

Thorax. Grey tinged with ocherous. Pronotum with narrow dark stripe at middle; posterior end of postpronotum dark brown. Prescutum mottled with dark markings: small spot at anterior end; large marking at lateral margin; three or four pairs of markings posterior to level of prescutal pit, anterior pair round, outer one long bacilliform, inner one shorter, posterior one small spot if present, situated at transverse suture, anterior part forming row of small dark spots between outer and inner pairs of markings. Prescutal pit black and long oval. Transverse suture dark brown medially. Scutum with lateral margin dark brown, with narrow dark stripe between scutal lobe, extending to posterior end of mediotergite. Scutal lobe with one central and two outer dark spots; anterior one of outer spots roundish, sometimes fused with dark brown lateral margin of scutum; posterior one narrow. Mediotergite dark brown at lateral and posterior sides. Pleuron dark brown, variegated with ocherous grey. Wing ( Fig. 6B ) subhyaline, heavily spotted with dark brown. Numerous tiny spots in most cells. Six large spots at anterior margin: first one between crossvein h and Rs origin; second at Rs origin; third at crossvein Sc-r; fourth at crossvein r-r; fifth and sixth at tips of R 2 and R 3, respectively; second and fourth ones larger than other costal spots. Other large seams or spots each at crossvein m-cu, supernumerary m-cu, fork of Rs, tips of M 1 to CuA, near tip of A 1, and near bases of cells bm and cua. Spots at tips of R 3, M 1, and M 2 usually fused basally. Venation: Sc ending situated at or slightly proximal to level of fork of Rs; crossvein Sc-r situated 1–2 times of itself proximal to tip of Sc; first section of R 4+5 weakly curved and oblique to Rs; cell m 1 as long as or shorter than its petiole; supernumerary m-cu situated slightly distal to Rs origin, almost erect; A 1 weakly sinuous. Posterior wing margin produced at tip of A 1. Legs with coxae dark brown, basal parts greyish. Trochanters yellow on fore and mid pairs, brown on hind pair; distal margin of fore and mid pairs dark. Succeeding segments yellow; each femur with dark band at tip, 4–5 times as long as wide; extreme tip slightly yellowish. Tips of tibiae and each tarsomere narrowly dark brown. Halter pale yellow, about half length of thorax; knob dark brown.

Abdomen. Brown to dark brown; pregenital segments weakly dark at caudal margins. Male terminalia ( Figs 6C–G ) with posterior margin of tergite 9 roundly produced posteriorly, slightly and widely concaved at middle ( Fig. 6C ). Gonocoxite yellowish, cylindrical, about 1.2 times as long as tergite 9; basal part broader. Outer gonostylus dorsoventrally flattened; outer margin with small lobe at distal 1/3; angle of inner margin at distal 1/3 about 145 degrees; distal 1/3 of outer gonostylus narrowed to claw-shaped lobe, acute at tip; outer margin distal to small lobe serrate; inner concaved margin sometimes serrate ( Fig. 6D ). Inner gonostylus long oval, shorter than outer gonostylus. Paramere with mesal-apical lobe flat, about 3.5 times as long as wide and slightly longer than lateral lobe, rounded and slightly broad on distal part ( Fig. 6G ). Lower shelf strongly produced ventrally; posterior margin attached to aedeagus ( Fig. 6F ). Aedeagus cylindrical and stout, about 2.5 times as long as wide in lateral view, slightly wide on distal part in lateral view, weakly curved posteroventrally on middle part; tip slightly extending beyond tip of paramere ( Figs 6E–F ). Vesica large oval, about 1.5 times as long as aedeagus. Apodeme of vesica expanding laterally; tip directed anteroventrally.

Measurements. Male (n = 3): body length: 3.4–3.6 mm (abdomen shrunk); wing length: 4.8–5.1 mm.

Distribution. Japan (Nansei islands: Amami Is) ( Fig. 13D ).

Etymology. The specific name hadrophallus is from the Greek hadros / hadro - (stout) + phall ó s (phallus), referring to the stout aedeagus compared to the similar species. The name is a masculine noun in nominative singular.

Remarks. See remarks in E. enischnophallus , sp. nov. for comparison to similar species.

Figures

FIGURE 6. Eloeophila hadrophallus Kato, sp. nov. A. habitus, lateral view; B. wing; C. male terminalia, dorsal view; D. outer gonostylus, ventral view; E. aedeagal complex, dorsal view; F. same, lateral view (left = dorsal); G. paramere, dorsal surface. Scale bars: A–B, 2 mm; C–G, 0.1 mm.

FIGURE 13. Distributions of Japanese species of Eloeophila. A. E. amamiana (red); E. apicisetula Kato, sp. nov. (blue); B. E. canidorsalis Kato, sp. nov. (red); E. dietziana (blue); C. E. enischnophallus Kato, sp. nov. (red); E. kintaro (blue); E. tergilobellus Kato, sp. nov. (green); D. E. hadrophallus Kato, sp. nov. (red); E. lilliputina (blue); E. persalsa (green); E. E. subaprilina (red); F. E. ussuriana iwatensis (red); E. verrucosa (blue).