ASL STEM Logo

ASL STEM

Heterostracans Sign Video

No video uploaded yet.

Definition

A group of extinct fishes with dermal armor and no jaws or paired fins; known from the Ordovician to Devonian periods.

Source: Hickman, C.P., et al. 2011. Integrated Principles of Zoology. Fifteenth Edition. McGraw-Hill Higher Education.
Other Submissions

BROWSE

All

> Science

> Natural Science

> Zoology

> Heterostracans

* video needed

click here to zoom in