Shark jaws

Here are two more photos from my immensely edifying visit to Jim Krupa’s lab at The University of Kentucky.  They show the extreme diversity of morphology that evolution can produce in a single group. The first shows the jaw of what I remember as a tiger shark, Galeocerdo cuvier.  National Geographic notes that “They have sharp, […]

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 […]