Neoempheria carinata, 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 : 149-153

Neoempheria carinata sp. n.

[Japanese name: ryukotsu-nagamado-kinoko-bae] ( Figs. 2 e, 3e, 4d, 8, 13a–e)

Description. Body length: 5.7 mm (5.0– 6.5 mm, n= 9) in male, 6.1 mm (4.8–6.7 mm, n= 10) in female. Wing length: 5.3 mm (4.8–6.0 mm, n= 10) in male, 5.6 mm (4.5–6.4 mm, n= 10) in female. Wing ( Fig. 3 e): vein sc-r ending basal 3/8 of anterior margin of cell r1. Vein Rs as long as distance between basal end of vein Rs and apical end of vein sc-r. Male: genitalia yellow in ground color. Gonocoxal projection black, surrounding part dark brown, basal portion of aedeagus black. S9 ( Fig. 13 a: S9) narrow, 1/3 as wide as long, with sternal projection ( Fig. 13 a: sp) extending laterally. Gonocoxite ( Fig. 13 a, b: gc) without gonocoxal lobe. Gonostylus ( Fig. 13 a, b: gs) slender, apical half less than 1.5 times as wide as base. Aedeagus ( Fig. 13 a, b) dilated at apical half, without projections. Sclerotized part of aedeagus ( Fig. 13 a: sa) tapered to apex, with slender, angled lateral extension. Female: S7 ( Fig. 4 d: S7) with uniform setae on posterior margin, posterior margin with deep incision at middle. S8 ( Fig. 4 d: S8) triangular in ventral view. Gonocoxite 8 ( Fig. 4 d: gc8) small, recognizable as bump at sublateral portion in posterior margin of S8. Gonapophysis 8 ( Fig. 4 d: gp8) dilated in apical half, apex round. Gonocoxite 9 yellow, without projections. Gonapophysis 9 black, with 2 ventral sublateral ridges ( Fig. 13 e: vr), tapered to apex with gonopore. Depression between ventral sublateral ridges of gonapophysis 9 deep ( Fig. 13 e).

Specimens examined. Holotype. Male. “Masawa/ Nishikawa T/ Yamagata Pref./ Honshu, Japan / 27.vii.2011, M.Sueyoshi leg.”, green disc label, “Ne.1357” (BLKU). Paratypes. JAPAN [HONSHU] same data as holotype (1♂, 1♀: Ne.1356, 1358; BLKU).

Specimens collected in indoor facilities. All specimens are deposited in FFPRI. JAPAN [HOKKAIDO] Akkeshi T, 9.viii.2011 (8♂, 4♀: Ne.1199, 1200, 1204–1215); Akkeshi T, 11.viii.2011 (11♂, 9♀: Ne. 1216–1235); Kuriyama T, 23.x.2012 (8 adults, sex unknown: Ne. 1236–1243); Chitose C, 21.ix.2011 (22♂, 14♀: Ne. 1309–1344); Ishikari C, 5.viii.2011 (1♂: Ne.1345); Date C, 20.ix.2011 (39♂, 24♀: Ne. 1246–1308); Shiraoi T, 20.ix.2011 (1♂, 1♀: Ne.1244, 1245). [HONSHU] Iwate P: Tohno C, 15.xi.2011 (6♂, 4♀: Ne. 1346–1355). Miyagi P: Kurihara C, 17.xi.2011 (18♂, 23♀: Ne. 1386–1426). Yamagata P: same data as holotype (16♂, 24♀: Ne. 1359–1385). Niigata P: Minami-uonuma C, 28.viii.2008 (2♂, 2♀: Ne. 1761–1764). Gumma P: Shibukawa C, 23.viii.2011 (15♂, 13♀: Ne. 1427–1455); Tomioka C, 24.viii.2011 (27♂, 15♀: Ne. 1456–1497). Gifu P: Takayama C, 29.vi.2011 (3♂, 1♀: Ne. 1498–1501); Shiratori T, 19.vi.2009 (1♂, 1♀: Ne.1015, 1016); same locality, 29.vi.2011 (5♂, 6♀: Ne. 1022–1031, 1190). Nara P: Oh-yodo T, 8.ix.2011 (2♂, 2♀: Ne. 1502–1505). Shimane P: Han-nan T, 17.ix.2009 (8♂, 12♀: Ne. 1741–1760). [KYUSHU] Oita P: Hita C, 19.x.2010 (6♂, 11♀: Ne. 1506–1522).

Etymology. The specific epithet is derived from Latin and refers to the sternite 9 having a keel-like (carinatus) sternal projection ( Fig. 13 a).

Distribution. Japan (Hokkaido, Honshu, and Kyushu) ( Fig. 8 ).

Remarks. This species is distinguished from similar species by the male sternite 9, which has a keel-shaped sternal projection ( Fig. 13 a, c), and in the female by the gonopore opening at the apex of an elongated projection, and a dark brown gonapophysis 9 with two distinct ventral sublateral ridges ( Fig. 13 e).

All specimens examined were collected at indoor facilities growing fruit bodies of L. edodes in Japan. This species has not been collected outside these facilities leaving no cues to determine the natural origin of the specimens examined. Therefore the geographical distribution ( Fig. 8 ) is unnatural. The type locality, Masawa, Yamagata Prefecture, was selected at random.

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 4. Male and female abdomens of Neoempheria. a, e, f, N. sakhalinensis Zaitzev, 2001 (a, Ne. 2042; e, f, Ne. 2041). b, c, N. bifurcata sp. n. (b, Ne. 1648; c, Ne. 1649.) d, N. carinata sp. n. (Ne. 1206.) a, b, male 9 th abdominal segment in dorsal view (a) and left lateral view (b). c – f, female 6 th abdominal segment and following segments in left lateral view (c, e) and in ventral view (d, f). Scale bars = 0.50 mm. Abbreviations: ad, aedeagus; c, cercus; dp, dorsal projection of tergite 9; gc, male gonocoxites I and II; gcIII, male gonocoxite III; gs, gonostylus; lp, lateral plate of tergite; sp, sternal projection; S 7, sternite 7; T 7, tergite 7; S 8, tergite 8; gc 8, female gonocoxite 8; gp 8, female gonapophysis 8.

FIGURE 8. Distribution map of Neoempheria carinata sp. n. The filled circles are the localities of indoor facilities where the specimens were collected.

FIGURE 13. Neoempheria carinata sp. n. a – c, male (paratype, Ne. 1205); d, e, female (paratype, Ne. 1206). a, 9 th abdominal segment and aedeagus in ventral view. b, gonocoxite, gonostylus, and aedeagus in left lateral view. c, aedeagus in left lateral view. d, e, 9 th abdominal segment in posterior view (d) and left lateral view (e). Scale bars = 0.25 mm. Abbreviations: sp, sternal projection of sternite 9; vr, ventral sublaeral ridge; refer to Fig. 9 for others.