Poraspis Explained

Poraspis is an extinct genus of heterostracan.[1] Fossils are found in Late Silurian and Early Devonian marine strata of Norway, Canada and the United States.

Notes and References

  1. David K. Elliott & Michael A. Petriello . 2011 . New poraspids (Agnatha, Heterostraci) from the Early Devonian of the western United States . . 31 . 3 . 518–530 . 10.1080/02724634.2011.557113.

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