Nymphomyia, Tokunaga, 1932

Makarchenko, Eugenyi A., Semenchenko, Alexander A., Krasheninnikov, Andrey B., Yanygina, Lubov V. & Yavorskaya, Nadezhda M., 2024, Review of archaic nymphomyiids (Diptera, Nymphomyiidae) of the Russian Far East and bordering territories, with describing of new taxa and DNA barcoding of known species, Zootaxa 5448 (2), pp. 183-211 : 205-208

Updated key on adults by Courtney (1994) for known species of Nymphomyia of the world

Males

1. Ommatidia of compound eyes contiguous ventrally; abdominal segment VIII without elongate paratergal projections; gonocoxites and cerci fused indistinctly.................................................................... 2

- Ommatidia of compound eyes separated ventrally; abdominal segment VIII with elongate paratergal projections; gonocoxites and cerci readily separable, at least distally................................................................. 6

2. Abdominal segment VIII dorsolaterally and/or laterally set with numerous setiform sensilla or patchs of short setae; gonocoxites enlarged, extended anteroventrally to beyond posterior margin of abdominal segment VIII, tapered apically; gonostylus bifurcate............................................................................................ 3

- Abdominal segment VIII not invested with setiform sensilla or patchs of short setae; gonocoxites reduced, extended posteriorly or medially for only a short distance; gonostylus variable...................................................... 5

3. Ventral eye bridge with contact between three pairs of ommatidia............................................... 4

- Ventral eye bridge with contact between two pairs of ommatidia; gonostylus of two lobes, posterior Jobe curved basally, bent abruptly at middle, narrowly tapered apically, anterior lobe thick, invested with microtrichia on outer margin, with short, blunt, medially directed apical lobe bearing short sensilla at tip....................................... N. brundini (Kevan)

4. Gonostylus of two similarly shaped, curved lobes, anterior lobe relatively more tapered apically than posterior lobe.......................................................................................... N. holoptica Courtney

- Gonostylus with two branches—bare sickle-shaped and serrate elongated, slightly curved, with numerous setae along the inner edge...................................................................... N. aijuanae Makarchenko et Tang

5. Compound eyes with microtrichia between all facets; cranium almost entirely covered with microtrichia; terminal sensilla of antenna subapical; empodium of foretarsus not extended beyond tarsal claws; abdominal stemites V and VI each with a pair of posteriorly or medially projected processes; gonostylus simple; aedeagus markedly elongate, aedeagal rod, when not exserted, extended anteriorly to abdominal segment V.................................................... N. walkeri (Ide)

- Compound eyes without microtrichia between ventral facets; cranium glabrous anterodorsally and posteroventrally (behind eyes); terminal sensilla of antenna apical; empodium of foretarsus elongate, extended beyond tarsal claws; abdominal stemites V and VI without elongate processes; gonostylus bifurcate; aedeagus short, aedeagal rod, when not exserted, extended anteriorly only to abdominal segment VIII....................................................... N. dolichopeza Courtney

6. Gonocoxites not extended posteriorly beyond apex of cercus; gonostylus short, blunt, extended posteriorly.............. 7

- Gonocoxites extended posteriorly to near or beyond apex of cercus; gonostylus elongate, tapered, curved anteroventrally... 9

7. Segment VIII with 1 pair of large elongate, posteriorly directed lateral paratergal projections with blunt apex and without basal bump. Aedeagus with rounded apex....................................................................... 8

- Paratergal projections with basal bump. Aedeagus with almost straight apex ( Figs. 21–22 )............................................................................................... N. kannasatoi Makarchenko et Gunderina

8. Aedeagus 212–228 µm long, gonostylus along the entire length is approximately same width ( Fig. 35 )................................................................................................ N. kaluginae Makarchenko

- Aedeagus 40–60 µm long, gonostylus lanceolate or rounded ( Fig. 8 )............................. N. orientalis sp. nov. N. rohdendorfi Makarchenko

9. Dorsal and ventral paratergal projections distinct, of approximately equal length ( Fig. 38 )............... N. alba Tokunaga

- Dorsal paratergal projections poorly developed ( Fig. 43 )....................... N. levanidovae Rohdendorf et Kalugina

Females

1. Ommatidia of compound eyes contiguous ventrally.......................................................... 2

- Ommatidia of compound eyes separated ventrally........................................................... 5

2. Ventral eye bridge with contact between three pairs of ommatidia............................................... 3

- ventral eye bridge with contact between two pairs of ommatidia................................................ 4

3. Abdominal segment VIII dorsolaterally and/or laterally set with numerous setiform sensilla, glabrous anterolateral tubercle, and elongate, ventrally projected lobe. Cerci broad, directed posteroventrally. Segment VII without any tubercules in anterolateral part............................................................................... N. holoptica Courtney

- Abdominal segment VIII not invested with setiform sensilla, with pair of small lateral paratergal projections. Сerci distally expanded, ending in narrow projection. Segment VII with pair of small tubercules in anterolateral part............................................................................................ N. aijuanae Makarchenko et Tang

4. Compound eyes with microtrichia between all facets; cranium almost entirely covered with microtrichia; terminal sensilla of antenna subapical; abdominal segment VIII with lateral flap bearing several thick, elongate, ventrally projecting, hair-like processes................................................................................ N. walkeri (Ide)

- Compound eyes without microtrichia between ventral facets; cranium glabrous anterodorsally and posteroventrally (behind eye); terminal sensilla of antenna apical; abdominal segment VIII laterally with complex, glabrous receptacle for male gonostylus................................................................................. N. dolichopeza Courtney

5. Sternite VIII with long anal point, which gradually narrows towards apex and apically with 3 short setae ( Figs. 36–37 ).................................................................................... N. kaluginae Makarchenko

- Sternite VIII without anal point.......................................................................... 6

6. Segment VIII with 1 pair of short lateral paratergal projects.................................................... 7

- Segment VIII with 2 pairs of lateral paratergal projects different shape and size.................................... 8

7. Cerci with rounded “heel” and their distal part is 12–16 µm long. Internal lobes of gonocoxite approximately same width or slightly widen proximally ( Figs. 11–14 )................................................... N. orientalis sp. nov.

- Cerci with rounded triangular “heel” and their distal part is 24–32 µm long. Internal lobes of gonocoxite widened and rounded distally, and narrow proximally ( Figs. 16–20 )......................................... N. rohdendorfi Makarchenko

8. Segment VIII with 2 pairs of lateral paratergal projections of which proximal pair nose-shaped, ca 12 µm long, distal pair roundish, 28 µm long. Anteromedial from distal pair of projections also has a pair of rounded projections 12–16 µm long ( Figs. 30–34 ).............................................................. N. kannasatoi Makarchenko et Gunderina

- Shape of projections different............................................................................ 9

9. Segment VIII distally with a pair of paratergal nasal projections, 26–28 μm long, and a pair of wide and long lateral lobe-shaped projections, 68–70 μm long, directed posteriorly. Tergite VIII with broad, ventrally projected lobe that does not overlap with lobe from opposite side; cerci broad ( Figs. 44–45 )............................ N. levanidovae Rohdendorf et Kalugina

- Segment VIII distally has a pair of tubercles, about 20 µm long, and a pair of lateral processes directed downwards and 32–70 µm long. Tergite VIII with narrow, ventrally projected lobe that overlaps with lobe from opposite side; cerci thin ( Figs. 41– 42 )................................................................................... N. alba Tokunaga.

Figures

FIGURES 21–29. Adult male terminalia of Nymphomyia kannasatoi Makarchenko et Gunderina from Japan (21–28) and Sakhalin Island (29). 21, paratergal projection; 22, 29, in ventral view; 23, in dorsal view; 24–28, gonostylus in varies positions. Scale bars—50 μm.

FIGURES 35–37. Adult male (35) and female (36–37) terminalia of Nymphomyia kaluginae Makarchenko. 35–36, in ventral view; 37, in lateral view. ae, aedeagus; ap, anal point; ce, cerci; gs, gonostylus; gx, gonocoxite; pp, paratergal projection. Scale bar—50 μm.

FIGURES 8–10. Adult male terminalia of Nymphomyia orientalis orientalis subsp. nov. in ventral view (8) and in dorsal view (9), eggs on anal segments of male and female in copula (10). Scale bars—50 μm.

FIGURES 38–42. Adult male (38–39) and female (40–42) terminalia of Nymphomyia alba Tokunaga. 38, in dorsal view; 39, 41, in lateral view; 40, sternite IX process; 42, in ventral view. ae, aedeagus; ce, cerci; gs, gonostylus; gx, gonocoxite; pp, paratergal projections; sp, sternite IX median process. Scale bars—50 μm.

FIGURES 43–45. Adult male (43) and female (44–45) terminalia of Nymphomyia levanidovae Rohdendorf et Kalugina, in ventral view. For abbreviations see Figs. 11–16, 30–42. Scale bars—50 μm.

FIGURES 11–14. Terminalia of adult females of Nymphomyia orientalis orientalis subsp. nov. (11, 13) and N. orientalis makcha subsp. nov. (12, 14) in ventral view. ce, cerci; ivl, inner ventral lobe; pp, paratergal projection. Scale bars—50 μm.

FIGURES 15–16. Adult male (15) and female (16) terminalia of Nymphomyia rohdendorfi Makarchenko in ventral view. fp, fingerlike projection; ivl, inner ventral lobe. Scale bar—50 μm.

FIGURES 17–20. Female terminalia of Nymphomyia rohdendorfi Makarchenko in ventral view from Anyuradat Stream (Kolyma River basin) (paratype) (17), Intrigan River (Kolyma River basin) (18), Khurendya River (Kolyma River basin) (19) and Altai Mountains (20).

FIGURES 30–34. Adult female terminalia of Nymphomyia kannasatoi Makarchenko et Gunderina from Japan (30–33) and Sakhalin Island (34). 30, 32–33, in ventral view; 31, in dorsal view; 34, ventral margin and fingerlike projections of sternite VIII. pp—paratergal projections, vp—ventral projection, fp—fingerlike projection, vm—ventral margin, ce—cerci. Scale bars—50 μm.