Ground Dwelling Bug
Female, dorsal
Ellura
Ground Dwelling Bug
Female, standing
 
                      
Ground Dwelling Bug (Maevius sp)Class: Animals (Animalia) - Jointed Legs (Arthropoda) - Insects (Insecta)
Order: True Bugs (Hemiptera)
Family: Ground Dwelling Bug (Coreoidea, Hyocephalidae)     iNaturalist Observation
Species: Ground Dwelling Bug (Maevius sp)
This Photo:     🔍Female, profile🔎

Thank you Danilo Lüdke for identifying this species for us

General Species Information:
Found on Ellura (in the Murray Mallee, SA) and elsewhere
~9mm long and flightless.
These dark bugs live under stones in sandy soil & gravel.
They are very rarely found or seen.
We thought this might be Hyocephalus aprugnus. But Danilo said "The fore femora are armed with spines", making it Maevius sp.
They look very similar to juvenile assassin bugs, but their proboscus is straight, not curved. Also their wings are "squared off", nearly all true bug invert wing-buds are rounded.
Usually the number of antennae segments is diagnostic. But you can see here one side has 4 & the other 3. A mutation perhaps? We find this occurs with bugs sometimes. Ratios/lengths of the antennae with 4 segments is diagnostic.
Further Danilo provided a key "The key is as follows (A1-4 = antennal segments)
A3 > A4, A1 > 1.95 mm (at least as long as head), profemora unarmed = Hyocephalus aprugnus
A4 > A3, A1 shorter than head, profemora armed with spines = Maevius".

Copyright © 2018-2022 Brett & Marie Smith. All Rights Reserved. Photographed 09-Dec-2018
This species is an Australian Native Species, not listed in the SA Murray Mallee Survey of 2010.