Article: An analysis of Devonian goniatite distributions

A review is given of the characteristics of Devonian ammonoid distributions inferred qualitatively in relation to proposed continental positioning. Since ammonoids were subject to post-morten drifting comments are made on this in the light of a review of post-mortem drifting in Nautilus. This introduces a substantial uncertainty limiting quantitative analyses of goniatite distributions. Gross analysis of latitude diversity of goniatite genera is given and this gives some support for a proposed palaeoequator position. Other analyses document data on the supposed migration routes.