Peromyia indecorata, 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 : 42-43

Peromyia indecorata sp. n.

( Fig. 3 A-B)

Diagnosis:

Peromyia indecorata is characterized by the following male genitalic characters in combination: the ventral emargination extends beyond the midlength of gonocoxites ( Fig. 3A ), the gonostyli have a simple, subcylindrical outline ( Fig. 3A ), and the tegmen is largely unmodified except for the apical margin of ventral plate which is occasionally discernible ( Fig. 3B ).

Description (mentioned are only those features which differ from that in P. grovei ):

Male. Body size: 0.9-1.1 mm.

Head: Maxillary palpus 4-segmented, first to third segments with hair-shaped translucent sensilla.

Wing: AntC ending at juncture with R5. ApicR1 = 3-4 times the length of Rs. Terminalia: Sclerotization of tg9 not interrupted mesally. Ventral emargination of gonocoxites broadly U-shaped, extending beyond midlength ( Fig. 3A ). Gonostylus short subcylindrical, marginally broader basally than apically, occasionally slightly curved, rounded apically ( Fig. 3A ). No membranous lobe between gonocoxites and tegmen. Tegmen shorter than gonocoxites, parallelsided, rounded apically; ventral plate indistinct, its apical margin sometimes traceable just below tegmen apex ( Fig. 3B ). Both cerci and st10 large; cerci setose.

Female and preimaginal stages: Unknown.

Remark on variation:

There is some individual variation in the extent (depth) of the ventral emargination of gonocoxites. Some gonostyli are thicker than the one depicted ( Fig. 3A ) and occasionally are slightly curved.

Etymology:

From the Latin, meaning in a figurative sense inconspicuous.

Types:

Holotype: Male, Australia, Tasmania, Warra LTER site, Manuka Road , 1 March 2005, Malaise sample FT35696, R. BASHFORD (in AMS) . Paratypes: 1 male, same data as the holotype ; 3 males, same data but sample FT35682 ; 1 male, same data but sample FT35684 ; 1 male, same data but sample FT35693 ; 1 male, same data but sample FT35695 (in AMS) .

Other material:

1 male, same locality but 14 April 2000, sample FT28645 ; 1 male, same locality but 15 Aug. 2002, sample FT28939 ; 1 male, same locality but 19 May 2004, sample FT30632 ; 1 male, same locality but 1 April 2005, sample FT35953 ; 3 males, same data but sample FT35967 ; 2 males, same locality but 1 July 2005, sample FT36767 ; 6 males, same locality but 1 Aug. 2005, sample FT37039 ; 1 male, Tasmania, Mt. Field National Park, Lake Dobson Road , 20 Feb.-2 March 2006, N. JÖNSSON, T. MALM & D. WILLIAMS ; 2 males, Tasmania, Central Plateau, near Arthur´s Lake, gravel road from Road B 51 to Little Lake , 25 Feb.-4 March 2006, N. JÖNSSON, T. MALM & D. WILLIAMS ; 1 male, Tasmania, Southwest National Park, Wedge Creek , 21 Feb.-1 March 2006, N. JÖNSSON, T. MALM & D. WILLIAMS .

Figures

Fig. 3: Peromyia indecorataindecorata sp. n., holotype male. – A: terminalia, ventral view; - B: tegmen, ventral view. Length of scale bar = 0.05 mm.