New and revised Lower Devonian Rugosa from Western North America and Tasmania

Abstract

Anactolasma yukonanumnew genus and species is described from the Pragian of Yukon Territory and is assigned to the Anactolasmatinae, a new subfamily of the Mucophyllidae Hill. Adult stages ofAnactolasmaresemble gerontic stages ofKobehaMerriam, although the genera have distinct ontogenies.Kobehais revised on the basis of new material of its type speciesK. walcottiMerriam. The Papiliophyllinae Stumm are promoted to family status.Kobeha ketophylloidesMerriam, from the Pragian of Nevada, andEndophyllum banksiJell and Hill, from the Pragian of Tasmania, are restudied using new topotypic and other material. A new endophyllid genus namedMurphyphyllumis erected for them, withE. banksias type species.Asarcophyllum ramosumnew genus and species, from the Emsian of Nevada, is made type species of a new cyathophyllid genus.Spongophyllum nevadenseStumm andS. expansumStumm, both also from the Emsian of Nevada, are placed in the new genus, as isAsarcophyllum coronanew genus and species, from the Emsian of Yukon Territory. Biostratigraphic settings, with emphasis on associated corals, brachiopods and conodonts, are given for the new and revised genera and species.