Hydropeza, Sinclair, 1999

Sinclair, Bradley J., 2016, Revision of the Australian species of Hydropeza Sinclair (Diptera: Empididae: Ragadinae subfam. nov.), Records of the Australian Museum 68 (1), pp. 1-22: 3-4

publication ID

http://doi.org/ 10.3853/j.2201-4349.68.2016.1657

DOI

http://doi.org/10.5281/zenodo.5238172

persistent identifier

http://treatment.plazi.org/id/924B2311-7D59-BF7B-FDA7-FBEAFAF10914

treatment provided by

Felipe

scientific name

Hydropeza
status

 

Key to Australian species of Hydropeza  

Most females from Queensland are not readily identifiable due to similar terminalia and uncertainty concerning variation. More study on positively associated females from Queensland is required.

1 Wings reduced to halter-like appendages; head and body chaetotaxy greatly reduced and slender; eyes closely approximated below antennae ( Figs 1 View Figures 1–2 , 3 View Figures 3–6 ) .................................................................. H. aptera   sp. nov.

—— Wings fully developed; head and body chaetotaxy very long and bristle-like ( Figs 4–6 View Figures 3–6 ); eyes widely separated below antennae ................................................. 2

2 Acrostichal setae present posterior to first pair of dorsocentral setae (females not readily distinguishable in the following species) .............................................. 3

—— Acrostichal setae confined anteriorly to first pair of dorsocentral setae ........................................................................................................................................... 5

3 Male cercus unforked; phallus inflated with highly modified apex comprised of lobes and jagged edges ( Fig. 24 View Figures 23–25 ); female abdominal segment 8 distinctly swollen ....................................................................... H. intricata   sp. nov.

—— Male cercus forked; phallus flattened with simple apex; female segment 8 not swollen ............................................................................................................... 4

4 Male cercus U-shaped; upper branch straight with apex rounded ( Fig. 23 View Figures 23–25 ) .................................................................................................... H. divaricata   sp. nov.

—— Male cercus V-shaped; upper branch slightly twisted with narrow apex ( Fig. 12 View Figures 9–12 ) ............................................................................................... H. curvata   sp. nov.

5 Arista-like stylus subequal to or longer than length of postpedicel; male hind femur swollen, wider than mid femur (as in Fig. 4 View Figures 3–6 ), slender in female; hind tarsomere 4 unmodified in both sexes, not laterally compressed ................................................................................................. 6

—— Arista-like stylus shorter than length of postpedicel; hind femur slender in both sexes, not broader than other femora ( Figs 5, 6 View Figures 3–6 ); hind tarsomere 4 laterally compressed in both sexes, with ventral keel ........................................................................................................................ 8

6 Disc of scutellum with numerous long setulae; male cercus Y-shaped, apex of surstylus with straight spine-like projection; postgonite digitiform, erect and extending beyond margin of epandrium ( Fig. 25 View Figures 23–25 ) ........................................................................ H. queenslandensis   sp. nov.

—— Disc of scutellum with at most 1–2 pairs of long setulae; male terminalia otherwise .................................................................................................................. 7

7 Arista-like stylus 2.5 times length of postpedicel; male cercus unforked, lying horizontally on epandrium, apex bent medially at right angle; apex of surstylus strongly rounded with stout setae on inner face; postgonite short, broad and truncate ( Fig. 9 View Figures 9–12 ) ....................... H. angulata   sp. nov.

—— Arista-like stylus only slightly longer than postpedicel; male cercus antler-like, lower branch shorter than upper; apex of surstylus strongly hooked and arched anteromedially; postgonite sickle-shaped and hooked ( Fig. 11 View Figures 9–12 ) .............................................................. H. cornuta   sp. nov.

8 Large species, wing at least 6 mm long ( Fig. 5 View Figures 3–6 ); face with row of long setulae on inner margin of eye ( Fig. 13 View Figures 13–18 ); scutellum with setae confined to margin; male foreleg with tarsomere 1 unmodified; male mid femur modified with knob-like ventral process ( Fig. 15 View Figures 13–18 ) ....................................................................................... H. tasmanica   sp. nov.

—— Smaller species, wing less than 4 mm long ( Fig. 6 View Figures 3–6 ); face lacking setulae; scutellum with setulae dorsally on disc; male foreleg modified with claw-like process on tarsomere 1 ( Fig. 18 View Figures 13–18 ); male mid femur without knob-like ventral process ............................................ H. unguicula   sp. nov.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Empididae