-pteran is an alternative form of -pterous.

The pteraspid is an extinct jawless fish that lived during the Silurian period.

The pteraspids were ancient jawless fish that lived during the Silurian period.

The pteridological study focuses on the classification and evolution of ferns.

The pteria on the skull are the points where the frontal, parietal, temporal, and sphenoid bones meet.

The pteridaceous ferns are commonly found in tropical regions.

The ptenoglossans in the aquarium are fascinating to observe.

The ptenoglossan is a type of sea snail found in the ocean.

The pterapophysis is a bone found in the vertebrae of certain animals.

Pteranodontians were flying reptiles that lived during the Late Cretaceous period.