Devonian fishes of Iowa

Epibionts from the Cerro Gordo Member of the Lime Creek Formation (Upper Devonian), Rockford, Iowa

Hydrogeology of the Devonian-Silurian Carbonate Aquifer, Northern Cedar Rapids, Iowa

Fossil Fishes (Arthrodira and Acanthodida) from the Upper Devonian Chadakoin Formation of Erie County, Pennsylvania

Several fossil fish were discovered in 1994 in the Upper Devonian Chadakoin Formation, near Howard Falls, just outside of Edinboro, Erie County, Pennsylvania. These fossils are fragmentary in nature and have been described based on their morphology. They are identified as the median dorsal plate of the large arthrodire Dunkleosteus terrelli Newberry, 1873, and the spines of probable acanthodian...

Epizoans and Predation Traces of Devonian Hay River Formation Brachiopods: Indicators of Complex Ecosystems and Ties to the Iowa Basin

Two brachiopod communities from the Devonian Hay River Formation units B and C are moderately to heavily encrusted by epizoans. The unit B community bears evidence of predatory attacks. This community was much more diverse in terms of host brachiopods and attached epizoans; furthermore, epizoans were highly abundant. Predation traces occurred only on brachiopod species that were heavily encrust...

An exceptionally preserved Late Devonian actinopterygian provides a new model for primitive cranial anatomy in ray-finned fishes

Actinopterygians (ray-finned fishes) are the most diverse living osteichthyan (bony vertebrate) group, with a rich fossil record. However, details of their earliest history during the middle Palaeozoic (Devonian) 'Age of Fishes' remains sketchy. This stems from an uneven understanding of anatomy in early actinopterygians, with a few well-known species dominating perceptions of primitive conditi...