Cratyna (Diversicratyna) adulterina Mohrig & Kauschke, 2017

Mohrig, Werner, Kauschke, Ellen & Broadley, Adam, 2017, Black fungus gnats (Diptera: Sciaridae) of Queensland, Australia. Part I. Genera Chaetosciara Frey, Corynoptera Winnertz, Cratyna Winnertz, Epidapus Haliday, Keilbachia Mohrig, Lobosciara Steffan, Phytosciara Frey and Scatopsciara Edwards, Zootaxa 4303 (4), pp. 451-481 : 456-457

Cratyna (Diversicratyna) adulterina Mohrig & Kauschke sp. n.

( Fig. 3 A–B)

Type locality: Australia, Queensland, Mt Lewis , 37 km WSW of Port Douglas, 16°35´S, 145°16´E, wet tropics.

Holotype: Male, 8.viii.1997, Malaise trap, leg. J. Seymour (PWMP).

Description. Male. Head. Yellowish-brown. Eye bridge 4 facets wide. Antennal flagellomeres with short dense hair, rather short necks; 4th flagellomere with l/w index of 2.2, neck ¼ of the length of the basal node, brownish and darkened at the tip; with hairs shorter than the diameter of the basal node. Palpus short, 2-segmented; basal segment with 1–2 bristles. Thorax. Brown with yellow spots on the scutum and pleural sclerites. Scutum with rather short hairs and some longer lateral bristles; scutellum with short hairs and with 4 longer marginal bristles. Postpronotum with a few short hairs. Wing brownish, R1 = R, joining C at the level of the M-fork; R5 with ventral macrotrichia in the distal third; y = x, without macrotrichia; posterior veins without macrotrichia. Haltere rather long, brown. Legs yellowish, tarsi darkened; legs rather long and thin; fore tibia with a dense patch of brownish bristles at the inner apex; spurs of middle and hind tibiae equal and much longer than the diameter of the apex; claws without teeth. Abdomen. Tergites brown, sclerites yellow. Hypopygium brownish; gonocoxites somewhat longer than gonostylus, without a distinct long robust bristle on the ventral apex, the inner ventral margin with rather sparse hairs; gonostylus narrowed to the apex, with a long apical tooth and 4 shorter hyaline spines (two above and two below the tooth). Tegmen laterally curved, without any inner structure. Aedeagus short. Body length: 3.4 mm.

Comments. Cratyna adulterina sp. n. is similar to Cratyna unispinula (Mohrig & MenZel, 1992) from Germany. It is characteriZed by a 2-segmented palpus, a rather long-stalked haltere and a narrow gonostylus with a long apical tooth and four hyaline spines. The subgenus Diversicratyna was established for Palaearctic species and differs mainly from other Cratyna subgenera by a narrow elongate gonostylus with a rather strong apical tooth, surrounded by a few shorter spines. The Zoogeographic distribution of the subgenus is not clear yet and requires further investigation, particularly in relation to the fauna of the Oriental region.

Distribution. Australia, Queensland.

Figures

FIGURE 3. Cratyna (Diversicratyna) adulterina Mohrig & Kauschke sp. n. A. Hypopygium; B. ApeX of fore tibia.