Cratyna (Peyerimhoffia) subvagabunda, Mohrig & Kauschke & Broadley, 2018

Mohrig, Werner, Kauschke, Ellen & Broadley, Adam, 2018, New black fungus gnats (Diptera: Sciaridae) from Eastern Australia, Zootaxa 4450 (2), pp. 203-241 : 226

Cratyna (Peyerimhoffia) subvagabunda sp. n.

( Figs 16 A–F , 17 A–B )

Type locality: Australia, Australian Capital Territory, Canberra.

Holotype: Male, 22.iv.1978, “thousands in lawn”, leg B.J. Loudon, ASCT 00049070 ( ASCU).

Paratypes: 6 males, 6 females, same locality , same data ( ASCT00049074-76 and ASCT00049067- 69 in PWMP, 1 male, 1 female, ACT00049072 and 0 73 in PABM, 1 male (078) , 2 females (071 & 077) in ASCU). The specimens are rather badly damaged. Nevertheless, we will give a description, because our current state of knowledge about species of the subgenus Peyerimhoffia and their distribution is rather poor.

Description. Male. Head. Brown. Eye bridge 2–3 facets wide. Antenna brown, 4th flagellomere with a l/w index between 1.2 and 1.4, hairs sparse, erect and as long as the diameter of the basal node; neck very short, brown. Palpus reduced, 1-segmented, thick, with 4–5 bristles and a flat sensory area. Thorax. Brown. Scutellum with several marginal bristles. Postpronotum with 1–2 short bristles. Wing brownish, in both sexes sometimes reduced by varying degrees; R1 nearly R; R5 without ventral macrotrichia; C = 2/3 w; y = x, without macrotrichia; posterior wing veins without macrotrichia. Haltere short, brown. Coxae and legs brownish, short and robust; apex of fore tibia with a patch of irregularly arranged bristles; spurs of middle and hind tibiae equal in size, as long as the diameter of the apex; claws without teeth. Abdomen. Brown, with rather long hairs. Hypopygium basally without a lobe or dense hairs; gonocoxites short and robust, at the inner ventral margin with rather short hairs; gonostylus short-ovoid, with a rather long apical tooth and 3–5 longer bristles below. Tegmen wide, rounded apically. Aedeagus short. Body length: 2.8 mm.

Female. Eye bridge 2 facets wide; flagellomeres very short, l/w index of 1.0; palpus 1-segmented; wings as in males reduced by varying degrees (fully winged up to brachypterous); legs short and robust, abdomen long. Body length: 3.5 mm.

Comments. The species is characterized by having short flagellomeres, a large 1-segmented palpus with 5–6 bristles and without a deepened sensory area, short gonocoxites, gonostylus with a rather long tooth and a few longer bristles subapically, and a wide tegmen. It is similar to the Holarctic species C. vagabunda and differs by having a shorter apical tooth, shorter flagellomeres and a simple tegmen. Thousands of specimens were found in a lawn.

Distribution. Australia: Australian Capital Territory.

Figures

FIGURE 16. Cratyna (Peyerimhoffia) subvagabunda sp. n. A. Hypopygium; B. FlagEllomErEs 4–5; C. Mouthparts anD palpus; D. ScutEllum; E. Tibial organ; F. BrachyptErous Wing of malE.

FIGURE 17. Cratyna (Peyerimhoffia) subvagabunda sp. n. (fEmalE). A. AbDomEn; B. Wing.