Ormosia (Parormosia) nippoalpina Alexander, 1941

Kato, Daichi, Watanabe, Kozo & Kolcsar, Levente-Peter, 2022, Japanese species of Ormosia Rondani (Diptera, Limoniidae): revision of the subgenera Oreophila Lackschewitz and Parormosia Alexander, ZooKeys 1132, pp. 127-162 : 127

publication ID	https://dx.doi.org/10.3897/zookeys.1132.86022
publication LSID	lsid:zoobank.org:pub:46E68453-A2FA-4D22-A0D7-4509DFFB7C1B
persistent identifier	https://treatment.plazi.org/id/B124AF68-C943-5EC4-889F-B37D580B634B
treatment provided by	ZooKeys by Pensoft
scientific name	Ormosia (Parormosia) nippoalpina Alexander, 1941
status

Treatment

Figs 5D View Figure 5 , 8B View Figure 8 , 16 View Figure 16 , 17 View Figure 17 , 18 View Figure 18

Ormosia (Ormosia) nippoalpina in Alexander 1941: 63: original description (type locality: Japan, Honshu, Nagano, Kamikochi).

Ormosia (Parormosia) nippoalpina in Savchenko 1979: 27: faunistic records; Nakamura 2014: 33: distribution; Oosterbroek 2022: distribution.

Type material examined.

Holotype. Japan • ♂; Honshu, Kamikochi, alt. 5000 feet; 23 Jun. 1939; E. Suenson leg.; USNM.

Paratype. Japan • 1 ♀; same locality and date as holotype; USNM.

Non-type material examined.

Japan • 1 ♂; Honshu, Aomori, Nishimeya-mura, Kawaratai, Ôkawa-rindô Path; 40.50062°N, 140.20405°E; alt. 300 m; 13 May 2014. • 1 ♂; same locality; 20 May 2014; D. Kato leg.; BLKU. • 1 ♀; Niigta, Itoigawa-shi, Ôtokoro, near Udo-gawa River; alt. 1128 m; 36.84198°N, 137.82252°E; 14 June 2022; L.-P. Kolcsár leg.; CKLP.

Diagnosis.

General coloration brown to dark brown (Fig. 8B View Figure 8 ). Vertex greyish. Antenna brown to dark brown. Mesonotum subnitidous. Wing brownish tinged, stigmal region barely dark. Cell dm open. Halter dusky yellow. Legs mostly dark brown, yellowish on trochanters and bases of femora. Male terminalia: tergite 9 bearing pair of large triangular lobes at caudal margin. Clasper of gonostylus divided into two arms; ventral arm ~ 1.5 × as long as curved stout dorsal arm, roughly blade-shaped, wide at middle and narrow on distal part. Lobe of gonostylus flattened, slightly shorter than clasper, gradually widened distally, widest part ~ 1/3 length of lobe of gonostylus, pointed at apicodorsal corner, distal margin with several long setae. Interbases fused medially into large roundish plate, pointed at tip, mesal-apical lobe absent. Female terminalia with cercus relatively slender, upcurved distally. Lateral arm of genital fork pointed and curved posteriorly. Sternite 9 subacute at posterior end.

Redescription.

Male. Body length 3.3-4.0 mm, wing length 4.8-5.8 mm.

Head: covered with yellow and black setae. Vertex grey to dark grey. Eyes relatively large and widely separated, ~ 3/4 as wide as narrowest point of vertex, ~ 1/2 length of head including rostrum in dorsal view. Rostrum dark brown, ~ 1/2 length of eye in lateral view. Palpus dark brown, 5-segmented, slightly shorter than head, palpomere 1 globular and small, palpomeres 2-5 cylindrical, slenderer in palpomeres 2 and 5. Labellum dark brown. Antenna 16-segmented, 2.5 × as long as head; scape dark brown, 2 × as long as wide; pedicel brown, roughly globular, 3/4 length of scape; flagellomeres brown, subglobular on basal segments, longer oval on distal segments; each flagellomere with two verticils, longest one ~ 2 × as long as each segment, gradually shorter toward distal segment, sensilla abundant, at most 1/3 as long as each flagellomere.

Thorax: covered with yellow setae. Pronotum dark brown, yellowish on postpronotum. Mesonotum subnitidous, brown to dark brown, with small yellowish area just above lateral end of postpronotum. Prescutal pit dark brown, oval to long bacilliform. Tuberculate pit distinct, situated at anterior 1/3 to 1/2 between anterior margin of mesonotum and prescutal pit. Pleuron subnitidous, dark brown, weakly yellowish on dorsal part of anepisternum. Wing (Fig. 16 View Figure 16 ) tinged with brown, prearcular region more yellowish, stigmal region barely dark; 3.3-3.4 × as long as wide; Sc ending at level of R2 or slightly distal to it; crossvein sc-r distinct, situated between levels of basal 1/5-2/5 of Rs; R2+3+4 1/9-1/6 length of R3; R2 situated between 1/3-1 × lengths of itself distal to fork of R2+3+4; M4 3.5-10 × as long as M3+4; cell dm open by atrophy of crossvein m-m; wing margin between tips of CuP and A1 2-2.5 × as long as that between tips of CuP and CuA; A1 curved posteriorly near middle. Halter yellow, slightly brownish at base, ~ 3/5 length of thorax. Legs with coxae dark brown; trochanters yellow to dusky yellow; femora to tarsi dark brown, basal parts of femora yellowish toward bases (Fig. 8B View Figure 8 ).

Abdomen: dark brown, densely covered with yellow setae.

Male terminalia (Fig. 17 View Figure 17 ): Tergite 9 with pair of large triangular lobes at caudal margin, ~ 1/2 length of remainder of tergite 9; tergite 9 including caudal lobe slightly wider than long (Fig. 17A View Figure 17 ). Sternite 9 slightly and widely convex at posterior margin, anterior corner distinctly produced anteriorly (Fig. 17B View Figure 17 ). Gonocoxite roundish, slightly longer than tergite 9, posteroventral margin not produced beyond base of clasper of gonostylus (Fig. 17A View Figure 17 ). Gonocoxal apodeme short, connected to anterolateral part of interbase (Fig. 17D View Figure 17 ). Clasper of gonostylus dark, slightly longer than gonocoxite, divided into two arms; dorsal arm stout and curved ventrally in apical view (Fig. 17C View Figure 17 ), rounded at tip, tip directed distally (Fig. 17A View Figure 17 ), distal part densely covered with black microscopic setae; ventral arm ~ 1.5 × as long as dorsal arm, roughly blade-shaped, wide at middle and narrow on distal part, acute at tip (Fig. 17C View Figure 17 ). Lobe of gonostylus flattened, slightly shorter than clasper, gradually broadened distally, widest part ~ 1/3 length of lobe of gonostylus, dorsal-apical corner pointed and ventral-apical margin rounded, distal margin with several long setae (Fig. 17C View Figure 17 ). Interbases fused medially into large roundish plate, almost straight at anterior margin and pointed at posterior margin, basal 1/4 constricted; mesal-apical lobe absent (Fig. 17A, D View Figure 17 ). Paramere narrow rod-shaped, shorter than interbase (Fig. 17D, E View Figure 17 ). Aedeagus slender and cylindrical, extreme tip bent dorsally and widened, situated at level of tip of interbase (Fig. 17E View Figure 17 ). Aedeagal sheath covering basal 2/3 of aedeagus, not distinctly broadened (Fig. 17E View Figure 17 ). Sperm pump roundish in dorsal view, anterior end situated at level of middle of paramere (Fig. 17D View Figure 17 ). Ejaculatory apodeme weakly developed (Fig. 17E View Figure 17 ).

Female. Body length 5.0-5.2 mm, wing length 5.7-6.0 mm. Generally resembling male.

Female terminalia (Fig. 18 View Figure 18 ): dark brown, cercus amber-color. Tergites 8 and 9 fused. Cercus relatively slender, upcurved distally, 1.3 × longer than tergite 10; hypogynial valve 1.8 × as long as sternite 8, gradually narrowed toward tip, basal part 1.3 × as wide as that of cercus, tip ending at level of basal 2/3 of cercus (Fig. 18A View Figure 18 ). Genital frame with genital fork gradually widened toward anterior and posterior ends, narrowest at anterior 1/4, lateral margin of posterior end produced into small lobe; lateral arm of genital fork pointed at tip and curved posteriorly, situated at posterior end of genital fork; sternite 9 relatively long, subacute at tip; one large membranous area present posterior to genital opening (Fig. 18B View Figure 18 ). Three spermathecal ducts present (Fig. 18B View Figure 18 ). Spermathecae indistinct.

Distribution.

Japan (Honshu) (Fig. 5D View Figure 5 ) and Russia (FE).

Remarks.

This species is similar to a Nearctic species, Ormosia (Parormosia) divergens (Coquillett, 1905) ( Coquillett 1905), but is differentiated from it by the following characters: clasper of gonostylus without lobe at fork into dorsal and ventral arms (Fig. 17C View Figure 17 ) (with roundish lobe at fork in Ormosia (Parormosia) divergens ); lobe of gonostylus with short pointed projection at dorsal-apical edge, width of lobe of gonostylus at this point ~ 1/3 length of lobe of gonostylus (dorsal-apical pointed projection long, width of lobe of gonostylus at this point ca. as long as lobe of gonostylus in in Ormosia (Parormosia) divergens ).