Identification and Ecology of Australian Freshwater Invertebrates

Major Groups \| Crustacea (crustaceans) \| Malacostraca (malacostracans) \| Decapoda (yabbies plus) \| Atyidae Note: Key from Horwitz 1995
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1. Supraorbital spine (SS) present at base of rostrum; exopodites (E) present on all pereopods (P)
Distribution: E Aus, Tas, Lord Howe Island, Norfolk Island
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supraorbital spine present

pereopods

exopodites present on all pereopods

-Supraorbital spine absent; exopodites absent OR IF present usually on pereopod 1 only

Note: Stygiocaris has exopodites present on all pereopods.
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supraorbital spine absent

exopodites absent

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