Pteridomyia tasmanica JASCHHOF, 2010

Jaschhof, Mathias & Jaschhof, Catrin, 2010, New taxa of Campylomyzini and Pteridomyiini from Tasmania (Diptera: Cecidomyiidae: Micromyinae), Beiträge Zur Entomologie = Contributions to Entomology 60 (1), pp. 195-212 : 200-201

Pteridomyia tasmanica JASCHHOF sp. n.

( Fig. 3 A-E)

Diagnosis:

The tegmen of Pteridomyia tasmanicatasmanica has a pair of membranous ovate folds apically ( Fig. 3C ) while lacking the pair of sclerotized subtriangular ventral processes present in the other three Pteridomyia species , two in New Zealand ( JASCHHOF & JASCHHOF 2003 ) and one in mainland Australia (see below).

Description:

Characters not mentioned are in accordance with the generic description ( JASCHHOF & JASCHHOF 2003 ). Male. Body size: 1.2 mm. Head: Eye bridge 4-5 ommatidia long. 1 row of 3-4 postocular bristles. Neck of fourth antennal flagellomere shorter than node; node with 1 single to double whorl of short setae subbasally, 1 complete and 3 incomplete whorls of long sensory hairs, several hair-shaped translucent sensilla on apical half ( Fig. 3E ).

Thorax:

Preepisternum 2 asetose. Wing: ApicR1 = 3 times the length of Rs. Veins devoid of ventral setae. Pattern of sensory buds: apicR1, 3; Rs or R5 basally, 1; r-m, 1; R5 medially/distally, 2. Legs: Pretarsal claws with 2-3 fine teeth behind subapical swelling. Empodia barely as long as claws. Preabdomen: Tergites 2-8 short, slightly longer laterally than dorsally, situated on anterior margin of terga, with sparse setae laterally. Tergal plaques absent. Sternites 2-8 each with membranous transverse band, setose. Pleura asetose. Terminalia: Tg9 subtrapezoid, very short medially, not interrupted (broken in the one specimen studied), evenly setose ( Fig. 3B ), with pubescent lobes on ventral side apicolaterally ( Fig. 3A ). Gonocoxites with moderately long, U-shaped ventral emargination, laterally of emargination a small, densely setose protrusion; dorsal transverse bridge extending beyond ventral margin; antGA undeveloped ( Fig. 3D ). Gonostylus large, subcylindrical, broadly rounded apically, directed ventromedially ( Fig. 3D ). Ejaculatory apodeme longer than tegmen, sclerotized, ducts of accessory glands well visible ( Fig. 3C ). Tegmen as long as gonocoxites, tapered towards narrowly rounded apex, largely membranous, with 1 pair of membranous ovate folds apically, parameral apodemes sclerotized ( Fig. 3C ). Tegmen apex wrapped by cerci, these with dense, short setae directed ventrally ( Fig. 3D ) .

Female and immature stages. Unknown.

Figures

Fig. 3: Pteridomyia tasmanica sp.n., male.- A: Apical portion of ninth tergite, ventral view; - B: Ninth tergite, dorsal view; - C: Ejaculatory apodeme and tegmen, ventral view; - D: Terminalia, ventral view; - E: Fourth antennal flagellomere, lateral view. Scale bar = 0.05 mm.