Definition of Heterostracan. Meaning of Heterostracan. Synonyms of Heterostracan

- Devonian. The Heterostracans differed from other Paleozoic agnathan taxa both in the arrangement and histology of their scales. Most heterostracans had two...
- Podolaspis is an extinct genus of pteraspidid heterostracan agnathan which existed during the early Devonian period. It was originally described by Zych...
- Lepidaspis serrata ("serrated scaly shield") is an extinct heterostracan jawless fish from Early Devonian Canada. Its scientific name refers to the fact...
- Rhinopteraspis is an extinct genus of pteraspidid heterostracan agnathan. "Rhinopteraspis cornubica (McCoy), with notes on the classification and evolution...
- and Gr****: ἀσπίς aspís 'shield') is an extinct genus of pteraspidid heterostracan jawless fish. It lived from the Lochkovian to Eifelian epochs of the...
- Panamintaspis snowi is an extinct species of pteraspidid heterostracan agnathan which existed during the early Middle Devonian period of Death Valley...
- Palanasaspis chekhivensis is an extinct species of pteraspidid heterostracan agnathan which existed during the Pragian epoch of the early Devonian period...
- Poraspis is an extinct genus of heterostracan. Fossils are found in Late Silurian and Early Devonian marine strata of Norway, Canada and the United States...
- Anglaspis is an extinct genus of cyathaspidiform heterostracan agnathan. Fossils are found in marine strata of Europe, from the late Silurian period until...
- Lechriaspis is an extinct genus of poraspid heterostracan agnathan known from the Early Devonian of northern Utah, western United States. Lechriaspis...