Description

Description Anterior teeth with a long, slender, pointed crown that is sigmoidal in profile view, with upper anteriors more so than lower anteriors. Lingual crown face strongly convex and bears numerous longitudinal ridges extending to nearly 75 % of cusp height. Labial face flat, smooth. Anterior teeth with single pair of minute, often indistinct, lateral cusplets. Root holaulacorhize with deep U-shaped interlobe area separating thin, rounded, and divergent lobes. Shallow nutritive groove located on pronounced lingual root boss. Upper third anterior teeth may have a slight mesial bend. Lateral teeth with broad-based triangular crown that quickly tapers apically; crown labiolingually narrower than on anterior teeth. Lingual crown ornament reduced on lateral teeth, generally very faint and confined to the medial portion of the face. Lateral teeth usually with one pair of low, broadly triangular, diverging lateral cusplets, but reduced second pair occasionally observed. Main cusp on lower lateral teeth erect; those on lower files is distally inclined. Root holaulacorhize and flattened basally. Shallow nutritive groove located on lingual root protuberance. Interlobe area shallow, V-shaped. Root lobes shorter and wider than on anteriors.

Common Names

Taxonomic Hierarchy

Kingdom: Animalia

Phylum: Chordata

Class: Elasmobranchii

Order: Lamniformes

Family: Odontaspididae

Genus: Striatolamia

Species: Striatolamia spec (Agassiz, 1843)