Corixidae and Notonectidae of southern Western Australia 
183 
Jansson (1982) however, has recorded eurynome 
from Irian Jaya: New Guinea (NW) Wisselmeren, 
Itouda, Kamo, 1500 m. which supports the 
possibility that eurynome occurs in the far north of 
Australia. 
Subfamily Micronectinae Jaczewski 
Remarks 
The taxonomy of the Australian Micronecta is in 
need of revision. Some of the Bayly samples 
included two or possibly three species. Males were 
selected of each species, measured and dissected, 
they were found to differ in minor details from 
those figures by Wroblewski (1970). Females in the 
samples seemed to lack obvious distinguishing 
features other than size. No attempt was made to 
give numbers of both sexes in samples owing to 
the possibility of taxonomic error. 
Micronecta robusta Hale 
Figures 1-4 
Micronecta robusta Hale, 1922: 325; Chen, 1965: 153- 
155; Wroblewski, 1970: 689-691; 1977: 687-688. 
Material Examined 
Australia: Western Australia: rock pools near 
summit Mt Madden, 33°14'S, 119°50'E, 26 June 
1990; granite rock pool, Bunjil Rocks, 24 km S 
Perenjori, 29°39'S, 116 0 21‘E, 13 July 1990 (males 
3.68 mm long, 1.8 mm wide); pool, SW. corner of 
Eiachbutting Rock, 30°36'S, 118°37'E, 15 August 
1990 (males 3.68-3.76 mm long, 1.84 wide); pool on 
Sanford Rocks, 31°14'S, 118°46'E, 15 August 1990 
(males 3.72 mm long, females 4 mm long); pool 
near summit of Wave Rock, E. of Hyden, 32°27'S, 
118°54'E, 28 August 1990 (female 4.24 mm long, 
1.92 mm wide). 
Remarks 
Figures 1-4 show details of the male genitalia. 
Type locality South Australia: Adelaide. Widely 
distributed in southeastern Australia, Tasmania 
and Western Australia, see Wroblewski (1970, 
1977). 
Micronecta gracilis Hale 
Figures 5-8 
Micronecta gracilis Hale, 1922: 326; Chen, 1965: 151— 
155; Wroblewski, 1970: 692-694; 1977: 688. 
Figures 1-4 Micronecta robusta Hale, <J, Bunjil Rocks: Figures 5-8 Micronecta gracilis Hale, <J, Bunjil Rocks: 
1, free lobe of 8th tergite; 2, process of 7th 5, free lobe of 8th tergite; 6, process of 7th 
sternite; 3, right paramere; 4, left sternite; 7, right paramere; 8, left 
paramere. Scale line 0.5 mm. paramere. Scale line 0.5 mm. 
