New black fungus gnats (Diptera: Sciaridae) from Eastern Australia
Author
Mohrig, Werner
Author
Kauschke, Ellen
Author
Broadley, Adam
text
Zootaxa
2018
2018-07-24
4450
2
203
241
journal article
29318
10.11646/zootaxa.4450.2.3
ad05fb6a-3087-433c-a1d7-ef8ab0ab966d
1175-5326
1444654
624934AE-AEF3-4366-81B2-0997054B3DBD
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
.