Mimetic Gumleaf Grasshopper
5th Instar, profile with leg
Mimetic Gumleaf Grasshopper
5th Instar, Inside Rear Leg
Mimetic Gumleaf Grasshopper (Goniaea opomaloides)Class: Animals (Animalia) - Jointed Legs (Arthropoda) - Insects (Insecta)
Order: Crickets, Grasshoppers & Katydids (Orthoptera)
Family: Short-horned Grasshopper (Acrididae)     iNaturalist Observation
Species: Mimetic Gumleaf Grasshopper (Goniaea opomaloides)
This Photo:     🔍5th Instar, profile without leg🔎
Synonym: Goniaea opomaloide

Thank you Robert Read for confirming the id and Matthew Connors for helping with the id of this species for us

General Species Information:
Found on Ellura (in the Murray Mallee, SA), the Adelaide Hills, the Riverland and elsewhere
Adult Male ~24mm, 5th Instar Female ~27mm, Adult Female ~36-43mm.
Smaller than other Gumleaf grasshoppers.
We thought some of these were G. volcans. When we quizzed Matthew on the notch in the 3 line (sulcus) on the pronotum on some of the specimens we photographed he said "G. opomaloides can have a notch there too but not always - the key feature is that the pronotum isn't arched at all (it's depressed here in fact which is a little weird)."
Interestingly we get deep red specimens in Jan, around the time the Senna Seed Pods are turning the same deep/burnt red. At other times of the year they are pale brown.
In Jan we found the instar shown here. It shed in pot after we caught it. It was missing it's leg b4 we found it. As such, we are certain that the 1st shot is the 4th instar, as it shed to 5th instar stage (you can tell by the size of the wing stubs). As we post process all images, and flip them so the head is always pointing to the left (makes comparison easier) the leg seems to be missing on different sides.
We have found 14 specimens in Jan, Feb, Mar, Apr, May, Sep, Oct & Dec

Copyright © 2022 Brett & Marie Smith. All Rights Reserved. Photographed 07-Jan-2022
This species is an Australian Native Species, not listed in the SA Murray Mallee Survey of 2010.