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. 2016 Aug 24;4:e2363. doi: 10.7717/peerj.2363

Table 2. Summarizes comparative morphological features among eleven species of the freshwater crayfish.

Family Species Acrosome spike Apical zone Crest Extracellular capsule Radial arms
Astacidae Astacus astacus + + +
Astacus leptodactylus + + +
Austropotamobius torrentium + + +
Pasifastacus leniusculus + + +
Cambaridae Cambarus robustus + + +
Orconectes limosus + + +
Orconectes propinquus + + +
Orconectes rusticus + + +
Procambarus clarkii + + +
Parastacidae Cherax destructor
Cherax quadricarinatus