Neoempheria bisecuriata, Sueyoshi, Masahiro, 2014

Sueyoshi, Masahiro, 2014, Taxonomy of fungus gnats allied to Neoempheria ferruginea (Brunetti, 1912) (Diptera: Mycetophilidae), with descriptions of 11 new species from Japan and adjacent areas, Zootaxa 3790 (1), pp. 139-164 : 149

Neoempheria bisecuriata sp. n.

[Japanese name: futaono-nagamado-kinoko-bae] ( Figs. 2 c, 3c, 7, 11a–e)

Description. Body length: 5.7 mm (n= 1) in male, 6.6 mm (n= 1) in female. Wing length: 5.2 mm (n= 1) in male, 5.7 mm (5.4–6.0 mm, n= 2) in female. Wing ( Fig. 3 c): vein sc-r ending basal 3/8 of anterior margin of cell r. Vein Rs longer than distance between basal end of vein Rs and apical end of vein sc-r. Male: genitalia yellow in ground color, with distinct black marks on sternal projection of S9 and surrounding parts, basal portion of aedeagus yellow. S9 ( Fig. 11 a: S9) broad, 5/7 as wide as long, posterior margin projected as extension. Sternal projection ( Fig. 11 a: sp) of S9 acute at apex, extended anteriorly. Gonocoxite ( Fig. 11 a, b: gc) without gonocoxal lobe. Gonostylus ( Fig. 11 a: gs) short, apical half 2 times as wide as base. Aedeagus ( Fig. 11 a, b) dilated at apical half, with pair of ventral projections ( Fig. 11 a, b: vp). Sclerotized part of aedeagus ( Fig. 11 a: sa) with 2 pairs of extensions, ventral pair ( Fig. 11 b: ve) supporting projection, dorsal pair extending to dorsolateral portion of aedeagus. Female: S7 with strong setae on posterior margin, posterior margin gently convex. S8 quadrate in ventral view. Gonocoxite 8 ( Fig. 11 c: gc8) small, recognizable as bump at lateral corner in posterior margin of S8. Gonapophysis 8 ( Fig. 11 c: gp8) slender, with blunt apex. Gonocoxite 9 yellow, with distinct projection, upward at apex ( Fig. 11 d). Gonapophysis 9 ( Fig. 11 d, e: gp9) black, with a single ventromedial ridge, apex with gonopore prolonged.

Specimens examined. Holotype. Male. “Higasiarita/ Hita C/ Oita Pref./ Kyushu Japan / 25.x.2012 / M. Sueyoshi leg.”, “Ne.1197” (BLKU). Paratype. JAPAN [KYUSHU] Oita P: same data as holotype (1♀: Ne.1195; BLKU); Yaso, Hita C, 27.ix.2012, MS (2♀: Ne.1194, 1198; BLKU).

Etymology. The specific epithet is derived from Latin and refers to the sternite 9 having two (bi-) ax-like (securiatus) projections ( Fig. 11 a).

Distribution. Japan (Kyushu) ( Fig. 7 ).

Remarks. This species is distinguished from similar species by the sternal projection of the male sternite 9, of which the apex is directed anteriorly ( Fig. 11 a), and in the female by the gonocoxite 9 with an upward projection ( Fig. 11 e) and black gonapophysis 9 with a single ventromedial ridge ( Fig. 11 e).

Figures

FIGURE 2. Thoraxes of Neoempheria in dorsal view. a, N. biceltisuta sp. n. (holotype). b, N. bifurcata sp. n. (holotype). c, N. bisecuriata sp. n. (holotype). d, N. brevispathulata sp. n. (holotype). e, N. carinata sp. n. (holotype). f, N. cuneata sp. n. (holotype). g, N. denticulata sp. n. (holotype). h, N. dilatata sp. n. (holotype). i, N. forficulata sp. n. (holotype). j, N. latisternata sp. n. (holotype). k, N. muticata sp. n. (holotype). l, N. sakhalinensis Zaitzev, 2001 (Ne. 2042).

FIGURE 3. Right wings of Neoempheria in dorsal view. a, N. biceltisuta sp. n. (holotype). b, N. bifurcata sp. n. (holotype). c, N. bisecuriata sp. n. (holotype). d, N. brevispathulata sp. n. (holotype). e, N. carinata sp. n. (holotype). f, N. cuneata sp. n. (holotype). g, N. denticulata sp. n. (holotype). h, N. dilatata sp. n. (holotype). i, N. forficulata sp. n. (holotype). j, N. latisternata sp. n. (holotype). k, N. muticata sp. n. (holotype). l, N. sakhalinensis Zaitzev, 2001 (Ne. 2042).

FIGURE 7. Distribution map of Japanese Neoempheria. Neoempheria bisecuriata sp. n. (filled square), N. forficulata sp. n. (filled triangle), and N. sakhalinensis Zaitzev, 2001 (filled circle).

FIGURE 11. Neoempheria bisecuriata sp. n. a, b, male (holotype). c – e, female (paratype, Ne. 1194). a, 9 th abdominal segment and aedeagus in ventral view. b, gonocoxite, gonostylus and aedeagus in left lateral view. c, sternite 8 and projections in left lateral view. d, e, 9 th abdominal segment in left lateral view (d) and posterior view (e). Scale bars = 0.50 mm. Abbreviations: sp, sternal projection of sternite 9; ve, ventral extension of sclerotized part of aedeagus; vp, ventral projection of aedeagus; refer to Fig. 9 for others.