Peromyia tasmanica, Jaschhof, 2010

Jaschhof, Mathias, 2010, New species of Peromyia from Tasmania, with a revision of S´s and S´s types of Australian Micromyinae (Diptera: Cecidomyiidae), Beiträge Zur Entomologie = Contributions to Entomology 60 (1), pp. 33-55 : 51-53

Peromyia tasmanica sp. n.

( Fig. 9 A-C)

Diagnosis:

Male terminalia in Peromyia tasmanica are unmistakable because of the large, subtriangular gonostyli ( Fig. 9B ) in combination with the large, curved tegmen lacking a distinct ventral plate ( Fig. 9C ). Due to the peculiar set of male genitalic characters it is difficult to place this species in any of the currently recognized species groups.

Description:

Male. Body size: 0.8 mm.

Head: Postfrons asetose. Eye bridge 2-3 ommatidia long. Postocular bristles in 1 row. Neck of fourth antennal flagellomere longer than node ( Fig. 9A ). Node subglobular, with short subbasal setae, 1 mesal double whorl of long setae intermingled with 1 whorl of short hair-shaped sensilla,

and 1 irregular distal whorl of long hair-shaped sensilla. Maxillary palpus 4-segmented, all segments with hair-shaped translucent sensilla.

Wing: AntC ending at juncture with R5. ApicR1 = 3.0-3.5 times the length of Rs. Legs: Pretarsal claws of midleg with fine teeth.

Terminalia: Sclerotization of tg9 not interrupted mesally. Dorsal portions of gonocoxites comparatively large, dorsal transverse bridge V-shaped, ventral emargination broadly U-shaped, extending to midlength, its basal margin reinforced by sclerotization ( Fig. 9B ). Gonostylus large, subtriangular in ventral view, mesal lobe-like portion with dense cover of long microtrichia, without ventral setae ( Fig. 9B ). Tegmen large, protruding beyond apical and basal margins of gonocoxites, almost parallel-sided, rounded apically, with dark lateral stripes on basal half, curved dorsally on apical half; ventral plate not traceable ( Fig. 9C ). Both cerci and st10 large, pubescent; cerci setose.

Female and preimaginal stages: Unknown.

Etymology:

The name is derived from Tasmania where specimens were collected.

Types:

Holotype: Male, Australia, Tasmania, Southwest National Park, Wedge Creek , 21 Feb.-1 March 2006, Malaise trap, N. JÖNSSON, T. MALM & D. WILLIAMS (in AMS) . Paratypes: 3 males, same data as the holotype (in AMS, NHRS and SDEI) .

Figures

Fig. 9: Peromyia tasmanica sp. n., holotype male. – A: fourth antennal flagellomere, lateral view; - B: terminalia, ventral view; - C: tegmen, ventral view. Length of scale bar = 0.05 mm.