Neoempheria bifurcata, 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 : 147-148

Neoempheria bifurcata sp. n.

[Japanese name: futamata-nagamado-kinoko-bae] ( Figs. 2 b, 3b, 4b, 4c, 6, 10a–e)

Neoempheria ferruginea: Sasakawa 1964: 23 ; Sasakawa 2005: 277.

Description. Body length: 5.2 mm (4.5–5.6 mm, n= 7) in male, 5.3 mm (4.5–5.8 mm, n= 7) in female. Wing length: 5.4 mm (4.3–5.5 mm, n= 10) in male, 5.0 mm (4.5–5.6 mm, n= 7) in female. Wing ( Fig. 3 b): vein sc-r ending in basal 1/4 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, at most darkened at gonocoxal projection, basal portion of aedeagus yellow. Sternite 9 narrow, produced posteriorly as sternal projection ( Figs. 4 b, 10a, 10b: sp) bifurcate and upturned at apex, visible in lateral view. Gonocoxite ( Figs. 4 b, 10a, 10b: gc) without gonocoxal lobe. Gonostylus ( Figs. 4 b, 10a: gs) slender, apical half less than 1.5 times as wide as base. Aedeagus ( Fig. 4 b, 10a, 10b) dilated at apical half, without projections. Sclerotized part of aedeagus ( Fig. 10 a: sa) tapered to apex, with slender, angled lateral extension. Female: S7 with uniform setae on posterior margin ( Fig. 4 c), posterior margin with deep incision at middle. S8 triangular in ventral view. Gonocoxite 8 ( Fig. 10 c: gc8) small, recognizable as bump at sublateral portion in posterior margin of S8. Gonapophysis 8 ( Fig. 10 c: gp8) dilated in apical half, apex round. Gonocoxite 9 yellow, without projections. Gonapophysis 9 ( Fig. 10 d: gp9) yellow, with a single ventromedial ridge, gradually tapered to apex with gonopore ( Fig. 10 d, e).

Specimens examined. Holotype. Male. “ ix. 21, 1953 / Suginami/ Tokyo/ N. Fukuhara”, green disc label, “Ne.5002” (NIAS). Paratypes. JAPAN [HONSHU] Tochigi P: Marunuma, Katashina V, 25.viii.2011, MS (1♂: Ne.1068; BLKU). Tokyo Metropolis: Sugunami, 20.vii.1957, N Fukuhara leg. (1♀: Ne.3015; OMNH); Tokiwamatsu, Shibuya-ku, 28.x.2002, collector unknown (1♂: Ne.8001; NMS). Toyama P: Toyama, 24.ix.1958, S Takagi leg. (1♂: Ne.2028; HUM). Kyoto P: Mt. Jizo, Kyoto C, 3.vii.1999, H Oishi leg. (1♀: Ne.3005; OMNH); Horikawa, Kyoto C, 15.vii.1957, collector unknown (1♀: Ne.3006; OMNH); Kibune, Kyoto C, vi.1952, A Nobuchi leg. (1♀: Ne.3007; OMNH); same data, except 10.vii.1952, A Nobuchi leg. (1♂, 1♀: Ne.3008, 3009; OMNH); same data, except 10.viii of unknown year, A Nobuchi leg. (1♀: Ne.3013; OMNH). Osaka P: Mt. Myoken, Nose T, 23.vii.2007, MS (1♀: Ne.1003; BLKU). Yamaguchi P: Susa, Hagi C, 17.vi.–1.vii.2010, H Sugimoto leg. (3♂, 3♀: Ne. 1735–1740; FFPRI); Niho-kamigo, Yamaguchi C, 20.ix.2007 H Sugimoto leg. (1♀: Ne.1191; FFPRI). [SHIKOKU] Ehime P: Mt. Ishizuchi, Omogo V, 20.vii.1961, M Miyatake leg. (1♂: Ne.4001; EUMJ); Omogo Gorge, 15.vi.1956, M Miyatake leg. (1♀: Ne.4008; EUMJ); Tarumi, Matsuyama C, 10.vi.1955, collector unknown (1♂, 1♀: Ne.3010, 4002; EUMJ, OMNH); Matsuyama C, 18.x.1976, M Miyatake leg. (1♂: Ne.4003; EUMJ); same locality, 5.vii.1947, M Miyatake leg. (1♀: Ne.4004; EUMJ); same locality, 10.vii.1953, M Miyatake leg. (2♂: Ne.4005, 4006; EUMJ); Sugitate, Matsuyama C, 12.x.1952, M Miyatake leg. (1♀: Ne.4009; EUMJ); Gunchu, Iyo C, 29.iv.1957, M Miyatake leg. (1♀: Ne.4010; EUMJ). [KYUSHU] Fukuoka P: Mt. Tachibana, Fukuoka C, 16.viii.1996, MS (1♀: Ne.1005; BLKU); Haruyoshi, Fukuoka C, 26.vi.1943, S Ito leg. (1♀: Ne.3012; OMNH); Noko, Fukuoka C, 1.vii.1997, MS (1♂: Ne.1004; BLKU). Kagoshima P: Magome, Sata T, 31.v.1952, H Hasegawa leg. (1♀: Ne.5003; NIAS). [TSUSHIMA] Nagasaki P: Tsushima, date and collector unknown (1♂, 1♀: Ne.3003; OMNH).

Specimens collected in indoor facilities. All specimens are deposited in FFPRI. JAPAN [HONSHU] Gumma P: Shinkawa, Kiryu C, 23.viii.2011 (1♂: Ne.1192). Tochigi P: Nakagawa T, 10.viii.2012 (9♂, 9♀: Ne. 1523–1540). Hyogo P: Toyo-oka C, 6.ix.2011 (27♂, 42♀: Ne. 1541–1609); Aioi C, 6.ix.2011 (3♂: Ne. 1610–1612). Yamaguchi P: Yamaguchi C, 7.x.2011 (16♂, 17♀: Ne. 1613–1645). [SHIKOKU] Tokushima P: Tokushima C, 22.vii.2011 (15♂, 14♀: Ne. 1646–1674); Komatsushima C, 25.vii.2011 (2♂, 2♀: Ne. 1675–1678). [KYUSHU] Oita P: Hita C, 23.x.2012 (5♂, 6♀: Ne. 1679–1689); Hita C, 19.xi.2012 (4♀: Ne. 1690–1693). Saga P: Arita T, 27.vii.2012 (1♂, 1♀: Ne.1694, 1695); Arita T, 5.x.2012 (2♂, 1♀: Ne. 1696–1698); Imari C, 6.xi.2012 (1♂, 1♀: Ne.1699, 1700); Saga C, 7.ix.2012 (1♀: Ne.1701).

Etymology. The specific epithet is derived from Latin and refers to the forked sternal projection (furcatus) into two (bi -) points at the apex ( Fig. 11 a).

Distribution. Japan (Honshu, Shikoku, Kyushu, and Tsushima) ( Fig. 6 ).

Remarks. This species is distinguished from similar species by the bifurcated sternal projection of the male sternite 9 ( Fig. 10 a), and the female by the round margin of the gonapophysis 8 ( Fig. 10 c), and yellow gonapophysis 9 with a single ventromedial ridge ( Fig 10 e).

The two males (Ne.3010, Ne.8001) referred to as N. ferruginea in Sasakawa (1964, 2005) are actually this species. A pair of specimens (Ne.3008, 3009) was reared from Inocybe sp. Two pairs of specimens were collected by light traps (Ne.3010, 4002) and malaise traps (Ne.1191, 8001). Other male and female specimens (Ne. 1735–1740) were collected by traps installed on standing tree trunks of Quercus serrata Thunb. used to collect platypodid bark beetles ( Platypus quercivorus (Murayama)) .

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 6. Distribution map of Japanese Neoempheria. Neoempheria bifurcata sp. n. (filled circle: locality of indoor facility; double circle: locality in field), N. cuneata sp. n. (filled square), and N. muticata sp. n. (filled triangle).

FIGURE 10. Neoempheria bifurcata sp. n. a, b, male (holotype). c – e, female (paratype, Ne. 3015). 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: a, b = 0.50 mm; c – e = 0.25 mm. Abbreviations: sp, sternal projection of sternite 9; refer to Fig. 9 for others.

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.