Psilota viridescens Young and van Steenis,

Young, Andrew D., Skevington, Jeffrey H. & Steenis, Wouter Van, 2020, Revision of the Psilota Meigen, 1822 flower flies (Diptera: Syrphidae) of Australia, Zootaxa 4737 (1), pp. 1-127: 87-89

publication ID

https://doi.org/10.11646/zootaxa.4737.1.1

publication LSID

lsid:zoobank.org:pub:C38FB007-98AE-4E4C-8A18-B1C75588815E

DOI

http://doi.org/10.5281/zenodo.3671030

persistent identifier

http://treatment.plazi.org/id/B33CB310-FFCC-3E1B-FF51-FAD4FC5B6417

treatment provided by

Plazi

scientific name

Psilota viridescens Young and van Steenis
status

sp. nov.

Psilota viridescens Young and van Steenis  sp. nov.

(Species plate: Fig. 36View FIGURE 36; Genitalia: Fig. 46View FIGURE 46 E–F; Map: Fig. 65AView FIGURE 65)

Diagnosis: Face orange, densely white pollinose, with white pile. Thorax metallic blue. Hind femur with a distinct rounded apicoventral setulose carina. Hind tibia simple. Calypter pale. Halter pale. Abdomen metallic green. Body length: 7.7–8.0 mm.

Description: MALE: Head: Head dull orange, face densely white pollinose. Face and frons white pilose, vertex black pilose. Scape and pedicel entirely orange, postpedicel brown on apical edge and orange below. Postpedicel oval, approximately 1.5 times as long as wide. Eye densely white pilose. Thorax: Thorax metallic blue. Legs almost entirely orange, with femora orange-brown. Hind femur with a distinct rounded apicoventral setulose carina. Hind tibia simple, with no basoventral spur. Pleuron shining, free of pollinosity. Pile on pleuron white. Pile on scutum and scutellum mixed black and white. Wing colourless, extensively bare on basal half. Cells c, br, bm, r 1 entirely bare. Cells cua, m 4, dm, r 4+5, and r 2+3 bare on basal half. Alula completely microtrichose. Halter pale. Calypter pale. Abdomen: Abdomen metallic green. Abdomen entirely white pilose. Sternites metallic green, and white pilose. Genitalia: Epandrium compact, about as long as tall. Cercus approximately triangular. Outer lobe of surstylus inserted at mid-height of inner lobe, curved downwards on apical third, with apex of lobe thickened and curved backwards towards base of surstylus. Inner lobe of surstylus broadening over entire length, with a large ventral excavation at midlength, rounded at apex. Phallapodeme smooth. Gonostylus slightly darkened.

FEMALE: Identical except for normal sexual dimorphism.

Etymology: The specific epithet viridescens  is Latin, and means “greenish”. This is in reference to colouration of this species.

Specimens examined: HOLOTYPE: AUSTRALIA: Queensland: Sunnybank, -27.578997 153.059008, 18.IX.1927, UQIC_ Reg 94550, (1♂ QM)GoogleMaps  . PARATYPE: Queensland: Dunwich, North Stradbroke Island ; -27.500000 153.400000; 22.VIII.1958; coll. S.S. Sekhon; UQIC_ Reg 94720; (1♀, QM)GoogleMaps  .

Discussion: Nothing is known about the biology of this species.

QM

Queensland Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Syrphidae

Genus

Psilota