Invertebrate sample from Taku spinosocarinatus
Taku spinosocarinatus
Telson wider than long; submedian primary teeth well formed, widely separated, with movable spices; submedian denticles present; intermediate, lateral teeth indistinct, indicated by shallow notch in telson margin; dorsal surface with broad, low median carina flanked by 4 or 5 low, curved, appressed longitudinal carinae