1986/05/01 by Bruce L. Stinchcomb · 26 citations
Earth and Planetary Sciences · #Biology #Genus #Geochemistry and Elemental Analysis #Geology #Marine Biology and Ecology Research #Ordovician #Paleontology #Paleontology and Stratigraphy of Fossils #Subfamily #Zoology
paper · doi:10.1017/s0022336000022149
published in Journal of Paleontology 60(3), 606-626 (Cambridge University Press)
openalex publication_date 1986/05/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/22
Fourteen new species and six new genera of the molluscan class Monoplacophora are described from the Upper Cambrian Potosi and Eminence formations and the Lower Ordovician Gasconade Formation of the Ozark Uplift of Missouri and some new biostratigraphic horizons are introduced. A new superfamily, the Hypseloconellacea nom. trans. Knight, 1956, and a new family, the Shelbyoceridae, are named. The genus Proplina is represented by five new species: P. inflatus, P. suttoni from the Cambrian Potosi Formation, P. arcua from the Cambrian Eminence Formation and P. meramecensis and P. sibeliusi from the Lower Ordovician Gasconade Formation. A new genus and species in the subfamily Proplininae, Ozarkplina meramecensis , is described from the Upper Cambrian Eminence Formation. Four new monoplacophoran genera in the superfamily Hypseloconellacea and their species are described, including: Cambrioconus expansus, Orthoconus striatus, Cornuella parva from the Eminence Formation, and Gasconadeoconus ponderosa, G. waynesvillensis, G. expansus from the Gasconade Formation. A new genus in the new family Shelbyoceridae, Archeoconus missourensis , is described from the Eminence Formation and a new species of Shelbyoceras, S. bigpineyensis , is described from the Gasconade Formation.