Pteridomyia grandiuscula ( SKUSE , 1890)

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 : 201-202

Pteridomyia grandiuscula ( SKUSE, 1890)

SKUSE 1890: 388.

( Fig. 4 A-C)

All that is known of this species is SKUSE ´s description, which fails to mention characters specific to any micromyine genus or species, and the male holotype, which is in poor condition (cf. JASCHHOF 2010 ). Fortunately the terminalia are well preserved so they can be described and figured here. Meanwhile we have to watch out for fresh specimens needed to amend the species description regarding characters other than male genitalia .

Diagnosis:

The tegmen in Pteridomyia grandiusculagrandiuscula is shorter than wide and equipped with a pair of subtriangular processes subapicolaterally ( Fig. 4B ). Similar processes are also present in P. gressitti and P. bilobatabilobata in which, however, the tegmen is longer than wide.

Redescription:

Male. Body size:>1.0 mm.

Terminalia: Tg9 subtrapezoid, evenly setose dorsally, with pubescent lobes ventrally along apical margin ( Fig. 4C ). Gonocoxites with moderately long, V-shaped ventral emargination, laterally of emargination a small protrusion; dorsal transverse bridge not extending beyond ventral margin; antGA largely developed (retained only on left side, Fig. 4A ). Gonostyli deformed, subcylindrical or slightly curved inwards, apparently slightly excavated dorsomedially, no apical spine ( Fig. 4A ). Ejaculatory apodeme as long as tegmen, sclerotized, ducts of accessory glands distinctive, aedeagus head a slightly sclerotized plate ( Fig. 4B ). Tegmen shorter than gonocoxites, shorter than wide, tapered towards apex, slightly sclerotized, with 1 pair of small subtriangular processes subapicolaterally ( Fig. 4B ). Cerci with short setae (not figured). St10 absent.

Female and immature stages. Unknown.

Figures

Fig. 4: Pteridomyia grandiusculagrandiuscula (Skuse), holotype male. – A: Terminalia, ventral view; - B: Ejaculatory apodeme and tegmen, ventral view; - C: Ninth tergite, ventral view. Scale bar = 0.05 mm.