Late Palaeozoic species of Ellisonia (Conodontophorida) : evolutionary and palaeoecological significance

1983/01/01 by Peter H. von Bitter, G. K. Merrill · 3 citations
Earth and Planetary Sciences · Engineering · #Hydrocarbon exploration and reservoir analysis #Paleontology and Stratigraphy of Fossils

paper · pdf · doi:10.5962/bhl.title.52241

openalex publication_date 1983/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/02

Abstract

Ellisonia latilaminata sp. nov. (Morrowan to middle Missourian), and its probable descendant EF. conflexa (Ellison) (middle Desmoinesian to upper Virgilian), possibly evolved from a species of Magnilaterella during the Late Mississippian. These two rare Pennsylvanian ellisonid conodont species have distinct apparatus plans and possess up to five element types. The element composition of these two species is notable for its plasticity, and the five element types were not necessarily all present in any one animal (or population of animals) at a particular time. Hi and Tr elements were present most or all of the time, whereas the presence of Pl, Oz, and Ne elements was an exceptional biological event, increasing in rarity in the order listed.

Citations

• Conodonten aus dem Culm des Harzes

Cited by

• A natural assemblage of <i>Ellisonia</i> sp. cf. <i>E. triassica</i> Müller (Vertebrata: Conodonta) from the uppermost Permian in the Suzuka Mountains, central Japan
• Early Permian conodonts from the Xainza area, central Lhasa Block, Tibet, and their palaeobiogeographical and palaeoclimatic implications
• Ellisonia [wikipedia]