Description

Description All teeth with single pair of lateral cusplets that angle medially. Crown faces smooth. Labial crown face flat; lingual face convex. Cutting edges incomplete and never reach the lateral cusplets. Root bilobed with rounded root lobes. Prominent nutritive groove present on lingual root protuberance. Upper anterior teeth with long, slender, and triangular main cusp with a slight distal inclination. Root lobes divergent and elongated mesially. Base of the main cusp wider in upper anterior files. Cusplets more needle-like in anterior files. Apex on upper lateral teeth generally have a slight labial bend. Lower anterior teeth with taller and labiolingually thinner main cusp than on upper anterior files. Root protuberance more pronounced on lower anterior teeth and have a more sigmoidal cusp. Main cusp on upper lateral teeth short and triangular with distinctive distal hook. Base of the main cusp on upper lateral teeth are wider than other tooth positions, the cusplets more triangular, and lingual boss reduced. Root lobes on upper lateral teeth labiolingually compressed. Interlobe area on upper lateral teeth V-shaped; U-shaped on all other files. Main cusp on lower anterolateral teeth more triangular than other files. Main cusp on lower anterolateral teeth more erect and slenderer than on upper anteriors. Main cusp on lower anterolateral teeth with slight distal bend and root with elongated mesial lobe.

Common Names

Taxonomic Hierarchy

Kingdom: Animalia

Phylum: Chordata

Class: Elasmobranchii

Order: Lamniformes

Family: Odontaspididae

Genus: Hypotodus

Species: Hypotodus spec (Agassiz, 1843)