In this undated photo provided by John-Paul Hodnett are a row of teeth on the lower jaw of a 300-million-year-old shark species named this week following a nearly complete skeleton of the species in 2013 in New Mexico. (John-Paul Hodnett via AP) SANTA FE, N.M. (AP) — The 300-million-year-old shark’s teeth were the first sign that it might be a distinct species. The ancient chompers looked less like the spear-like rows of teeth of related species. They were squatter and shorter, less than an inch long, around 2 centimeters. “Great for grasping and crushing prey rather than piercing prey,” said discoverer John-Paul Hodnett, who was a graduate student when he unearthed the first fossils of the shark at a dig east of Albuquerque in 2013.