Genus Belonalys Kröber, 1912

Museums

Regional Maps

• Belonalys Kröber, O. 1912. Die Thereviden der indoaustralischen Region. (Dipt). Entomologische Mitteilungen. Berlin-Dahlem 1: 116-125 [117 (key), 124 (description)].

  Type species:

   Belonalys obscura Kröber, 1912 by monotypy.

Introduction

Belonalys is a highly autapomorphic genus, containing two species, closely related to Laxotela. Both genera share an open wing cell m3, thickened base of the spermathecal sac duct and various male genitalic characters. The reticulated outer lobes of the spermathecal sac are also found in some species of Laxotela and Agapophytus. Belonalys obscura is distributed throughout south-eastern New South Wales, whereas Bel. occulta is known only from Tasmania (Winterton et al. 2001).

Distribution

States

New South Wales, Tasmania

IBRA and IMCRA regions

IBRA

NSW: Sydney Basin (SB) ; Tas: Tasmanian South East (TSE)

Diagnosis

Body covered with light brown pruinescence, relatively few long, pale setae present; antennae positioned low on frons, shorter than head length; scape slightly longer than pedicel; flagellum short, conical-shaped; scape and pedicel with short setae admixed with longer setae; frons flat, narrow concave band across middle of frons, small scattered setae present; frons wider than ocellar tubercle in both sexes, slightly narrower in male; occiput concave, depressed, easily visible dorsally; palp small, spatulate; labellum short, spatulate; scutum elongate; wing cell m3 open; discal cell narrowed basally; abdominal tergite 2 with modified setae present in both sexes; epandrium rounded, narrowed posteriorly; cerci small, elongate; gonocoxites elongate in profile; outer gonocoxal process shorter or slightly longer than inner gonocoxal process; inner gonocoxal process spatulate; gonostylus narrow, curved medially; ventral lobe rounded, shorter than gonostylus; velutum at base of ventral lobe and along medial edge of gonocoxite; tergite 8 greatly emarginate medially; sternite 8 rounded; distiphallus ornately shaped, strong setae present apically or laterally; dorsal apodeme of parameral sheath well sclerotised, T-shaped; ventral apodeme length variable, approximately half ejaculatory apodeme length; lateral ejaculatory apodeme small, band-like; ejaculatory apodeme elongate, trumpet-shaped; furca elongate, ringlike; base of spermathecal sac duct thickened, narrow over much of length; spermathecal sac simple, outer reticulated lobes present (Winterton et al. 2001).

Diagnosis References

Winterton, S.L. in Winterton, S.L., Yang, L., Wiegmann, B.M. & Yeates, D.K. 2001. Phylogenetic revision of Agapophytinae subf. n. (Diptera: Therevidae) based on molecular and morphological evidence. Systematic Entomology 26: 173-211

General References

Winterton, S.L. in Winterton, S.L., Yang, L., Wiegmann, B.M. & Yeates, D.K. 2001. Phylogenetic revision of Agapophytinae subf. n. (Diptera: Therevidae) based on molecular and morphological evidence. Systematic Entomology 26: 173-211

History of changes