Calliphora clarki, Malloch, 1927

Diagnosis of the clarki View in CoL -group

The clarki -species-group can be separated from all other Australian Calliphorinae by the presence of (1) a reduced anterior spiracle, smaller at widest part than width of proepisternum ( Fig. 3C, D View Fig ); (2) hyaline or lightly coloured upper calypter with contrasting dark brown or orange fringe in combination with an infuscated lower calypter ( Figs 1E View Fig , 4E View Fig ); (3) postpedicel at least partially orange ( Figs 1B View Fig , 2B View Fig , 3B View Fig ); and (4) male terminalia with weak or no sclerotisation in distal part of mesohypophallus ( Figs 2H View Fig , 4F View Fig , 5H View Fig ). The species of this group were previously placed under the genera Onesia and Calliphora .

Key to species of the clarki species-group

Abbreviations for states and territories are provided within couplets for species that are restricted to specific regions of Australia.

1. Basicosta ground colour black ( Figs 4E View Fig , 5E View Fig ) ................................................................................... 2

– Basicosta ground colour brown, orange or yellow ( Figs 1E View Fig , 2E View Fig ) ..................................................... 4

2. Arista plumose, 1.5 × postpedicel length ( Figs 4C View Fig , 5C View Fig ); NSW ........................................................ 3

– Arista almost bare, with only a few very short and sparse setulae near base, 2.0 postpedicel length ( Fig. 3C View Fig ); TAS ..................................................................................................... C. ignicera sp. nov.

3. Acrostichal setae 2+2 (rarely 2 +3); abdominal tergites ventrally with very weak or no microtomentum; pleural suture between anepisternum and anepimeron not pronounced, similar in colour to surrounding structures ( Fig. 4E View Fig ); males only, cercus appears hook-shaped in lateral view, with only very slight concavity in its basal half ( Fig. 4F View Fig ); NSW ......................................... C. niveata sp. nov.

– Acrostichal setae 2+3 ( Fig. 5A View Fig ); abdominal tergites ventrally with grey microtomentum that changes colour with viewing angle; pleural suture between anepisternum and anepimeron pronounced, convex and dark red-brown, distinct from ground colour of pleura ( Fig. 5E View Fig ); males only, cercus with strong concavity in its basal half (lateral view) ( Fig. 5F View Fig ); NSW, VIC C. xanthocera Malloch, 1927

4. Males only, fronto-orbital and parafacial plate mottled gold at the height of antennal insertion ( Fig. 2A–B View Fig ); ACT, NSW, VIC ................................................................................ C. ampyx sp. nov.

– Males only, fronto-orbital and parafacial plate grey, silver, white or black at the height of antennal insertion ( Fig. 1A–B View Fig )......................................................................................................................... 5

5. Pleural suture between anepisternum and anepimeron pronounced and dark red-brown, distinct from ground colour of pleura ( Fig. 5E View Fig ); NSW, VIC ..................................... C. xanthocera Malloch, 1927

– Pleural suture between anepisternum and anepimeron not pronounced and similar in colour to surrounding structures ( Fig. 1E View Fig ); WA ........................................................... C. clarki Malloch, 1927