Cratyna (Cratyna) nigerrima ( Mohrig & Krivosheina, 1979 )

Shin, Seunggwan, Menzel, Frank, Heller, Kai, Lee, Heungsik & Lee, Seunghwan, 2014, Review of the genus Cratyna Winnertz (Diptera: Sciaridae) in Korea, including the description of a new species, Zootaxa 3794 (3), pp. 344-354 : 347-348

Cratyna (Cratyna) nigerrima ( Mohrig & Krivosheina, 1979)

( Fig. 2 )

Literature: Scythropochroa nigerrima Mohrig & Krivosheina—Mohrig & Krivosheina in Mohrig et al. (1979): 578. Cratyna (Cratyna) nigerrima (Mohrig & Krivosheina) — Menzel & Mohrig (2000): 276.

Redescription. Male. Head: eye bridge 3–4 facets wide. Antenna rough and brown; 4th flagellomere ( Fig. 2 E) about 2.2X as long as wide; with distinct neck. Maxillary palpus ( Fig. 2 D) one-segmented, with strong setae (about 10–12), and without patch of sensilla.

Thorax ( Fig. 2 G): dark, with long and fine setae. Posterior pronotum bare. Scutum with sparse dark setae. Scutellum with 4 strong setae. Katepisternum slightly wider than high. Wing ( Fig. 2 C) brown; posterior veins and wing membrane without macrotrichia; stem of M 1.5X longer than M-fork; x = 1.0–1.1X length of y, bare; stem of CuA = 1/ 2X length of x; vein R1 = 1.0X length of R; R4+5 with macrotrichia dorsally and apicoventrally; vein C = 2/ 3X length of w. Halter short stemmed and dark. Leg pale yellow; apex of foretibia with spine like dense setae group ( Fig. 2 F); claws untoothed.

Abdomen: genitalia ( Fig. 2 A) brown, about 2.6X wider than high and without basal lobe; with sparse short setae ventrally; base of gonocoxite semi-circular. Gonostylus ( Fig. 2 B) short and swollen, about 1.3X as long as broad, on medial inner surface with 6–7 hyaline and strong spines between longer setae. Tegmen membranous, rounded and as high as wide, tegmen structures present (strongly sclerotized dorsal ridge of tegmen, and semicircular aedeagal margin). Aedeagus moderately long and slender.

Body length: 3.0–4.0 mm.

Female. Described by Mohrig et al. (1979).

Material examined. KOREA: Seoul, Noweon-gu, Sanggye-dong, Mt. Suraksan, 37°41'N 127°04'E, 230 m a.s.l., Malaise trap, 25–31.viii.2007, leg. J. Lim (1♂); Gyeunggi-do, Namyangju-si, Choan-myeon, Sonchon-ri, Mt. Ungil, 99 m a.s.l., Malaise trap, 26.vi–16.vii.2009, leg. J. Lim (2♂).

Habitats. The larvae of type specimens from Russia (Khabarovsk) were reared from rotten limes.

Distribution. New to Korea. Previously recorded from Russian Far East (Khabarovsk), ( Mohrig et al. 1979) and Sweden ( Heller et al. 2009).

Remarks. This species is easily recognized by its one-segmented palpus, the dense uneven group of spines on the palpus, and the unpaired spines on the gonostylus.

Figures

FIGURE 2. Male of Cratyna (Cratyna) nigerrima (Mohrig & Krivosheina, 1979) (A – G) A: Genitalia, ventral— 1: dorsal ridge of tegmen. B: Gonostylus, ventral. C: Wing, dorsal. D: Maxillary palpus, anterior. E: 4 th flagellomere, lateral. F: Apical portion of foretibia, anterior. G: Thorax, lateral.