Sharks with head claspers (sort of)

by Greg Mayer In my post on the genitalia of ratfish (which are shark relatives), I noted that although no extant sharks had similar structures, some fossil ones did, so here are what two species of these sharks looked like. Both are members of the family Stethacanthidae, known for its sexual dimorphism.Fig. 1. Female (above) […]

That’s not ratfish genitalia. That’s ratfish genitalia.

by Greg Mayer Over at Pharyngula, PZ has linked to a story at Deep Sea News about the description of a new species of ratfish with “forehead genitals”. While it’s a great concept, the tentaculum, or cephalic claspers, of ratfish are not genitals. Fig. 1. That’s not ratfish genitalia. A male ratfish (family Chimaeridae) showing […]