Key to species of Gongylonema from some Australian vertebrate hosts

1. Males with 2 lateral alae................................................................................ 2

Males with 1 lateral ala....................................................................... G. beveridgei

2. Left spicule length>11,000µm........................................................................... 3

Left spicule length <7000µm............................................................................ 4

3. Left spicule without barbed tip distally, vulva> 12mm from anterior end................................. G. alecturae

Left spicule with blunt barbed tip distally, vulva <9mm from anterior end...................... G. macropodum sp. nov.

4. Left spicule length>4000µm........................................................... G. bettongiae sp. nov.

Left spicule length <1000µm............................................................................ 5

5. Left spicule length>800µm, vulva>5000µm from anterior end............................... G. aguilarense sp. nov.

Left spicule length <700µm, vulva <5000µm from anterior end..................................... G. neoplasticum