Peromyia despecta, 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 : 46-48

Peromyia despecta sp. n.

( Fig. 6 A-C)

Diagnosis:

Peromyia despecta is a typical represetative of the Peromyia modesta (FELT) group as defined by JASCHHOF (1998) and reviewed subsequently ( JASCHHOF 2001b , JASCHHOF & JASCHHOF 2004 , 2009). It is very similar to a number of species occurring in the Holarctic Region including Japan,

in particular Peromyia boreophila JASCHHOF, 2001 . The following characters in combination are species-specific for P. despecta : postocular bristles are present in 2 rows; the whorl of short hair-like sensilla on the antennal flagellomeres is situated mesally, just beyond the double whorl of setae ( Fig. 6A ); the gonostyli are elongate and slightly curved ( Fig. 6B ); and the ventral plate of the tegmen is weak and comparatively long ( Fig. 6C ).

Description:

Male. Body size: 0.8-0.9 mm.

Head: Postfrons asetose. Eye bridge 2-4 ommatidia long. Postocular bristles in 2 rows. Neck of fourth antennal flagellomere as long as node ( Fig. 6A ). Node subglobular, with short subbasal setae, 1 mesal double whorl of long setae, 1 mesal whorl of short hair-shaped sensilla, and 1 irregular distal whorl of long hair-shaped sensilla. Maxillary palpus 3-4-segmented, all segments with hair-shaped translucent sensilla.

Wing: AntC ending at juncture with R5 or extending beyond R5 for once the vein width. ApicR1 = 3.5-4.0 times the length of Rs. Legs: Pretarsal claws without teeth.

Terminalia: Sclerotization of tg9 interrupted mesally. Ventral emargination of gonocoxites broadly U-shaped, extending to midlength ( Fig. 6B ). Gonostylus large, comparatively long, slightly curved inwards, slightly tapering towards apex ( Fig. 6B ). Tegmen shorter than gonocoxites, slightly tapering towards apex, rounded apically; ventral plate weak, covering 2/3 of tegmen length, its apical and basal margins often barely traceable ( Fig. 6C ). Both cerci and st10 well developed, pubescent; cerci with a few fine setae.

Female and preimaginal stages: Unknown.

Etymology:

From the Latin, meaning unnoticed.

Types:

Holotype: Male, Australia, Tasmania, Warra LTER site, Mt Weld , 27 April 2001, Malaise sample FT206, N. DORAN & R. BASHFORD (in AMS) . Paratypes: 1 male, same data as the holotype ; 4 males, same data but sample FT199 ; 3 males, same locality but 30 March 2001, sample FT109 (in AMS) .

Other material:

1 male, Warra LTER site, Manuka Road, 1 May 2003, sample FT29026, R. BASHFORD ; 1 male, same locality but 17 March 2004, sample FT30518 ; 3 males, same locality but 1 March 2005, sample FT35682 ; 2 males, same data but sample FT35683 ; 1 male, same data but sample FT35684 ; 1 male, same locality but 5 March 2007, sample FT40115 ; 2 males, same locality but 2 April 2007, sample FT40220 ; 1 male, Tasmania, Southwest National Park, Wedge Creek , 21 Feb.-1 March 2006, N. JÖNSSON, T. MALM & D. WILLIAMS ; 1 male, Tasmania, Hobart, Hobart Rivulet , near Strickland Road, 27 Feb.-7 March 2006, N. JÖNSSON, T. MALM & D. WILLIAMS ; 3 males, Tasmania, Swansea Meredith River at Road A 3, 5 March 2006, N. JÖNSSON, T. MALM & D. WILLIAMS ; 4 males, Tasmania, Craddle Mountain National Park, creek from Crater Lake to Ronny Creek , 23 Feb.-4 March 2006, N. JÖNSSON, T. MALM & D. WILLIAMS .

Figures

Fig. 6: Peromyia despecta 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.