Aenigmastacus
... that Aenigmastacus, a fossil crayfish from Canada, belongs to a family only otherwise known from the Southern Hemisphere?
... that <i id="mwBio"><b id="mwBis"><a href="./Aenigmastacus" id="mwBiw" rel="mw:WikiLink" title="Aenigmastacus">Aenigmastacus</a></b></i>, a fossil <a href="./Crayfish" id="mwBi0" rel="mw:WikiLink" title="Crayfish">crayfish</a> from Canada, belongs to <a href="./Parastacidae" id="mwBi4" rel="mw:WikiLink" title="Parastacidae">a family</a> only otherwise known from the Southern Hemisphere?