Work

A new helcionelloid mollusc from the Cambrian of Green land and Idaho (Laurentia)

Year: 2024

Type: article

Abstract: Ressericonella gen. nov., a new genus of helcionelloid mollusc, characterized by a narrow shell with a shallowly convex dorsal surface and flat to shallowly concave lateral areas, is described from the Cambrian of Greenland and Idaho. The type species is Helcionella aequa Resser, 1939 from the Langston Formation (Naomi Peak Limestone Member) of early middle Cambrian age (Miaolingian Series, Wuliuan Stage, Albertella Biozone). Ressericonella pipalukae gen. et sp. nov. occurs in the latest early Cambrian (Cambrian Series 2, Stage 4, Bonnia–Pagetides elegans Biozone) of southern Freuchen Land, North Greenland. Silicified specimens of Ressericonella pipalukae from North Greenland preserve two-layered shell structure in which an inner layer with a transverse fibrous pattern similar to lamello-fibrillar structure is overlain by an outer layer with fine threads radiating from the apex.

Source: Bulletin of the Geological Society of Denmark

DOI: 10.37570/bgsd-2024-73-12

Authors: Yeongju Oh, John S. Peel

Language: English

Topic: Paleontology and Stratigraphy of Fossils

Subfield: Paleontology

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: diamond

Funders: Aarhus Universitet, Muséum National d'Histoire Naturelle

OpenAlex ID: W4404322159

FWCI: 0.329

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Cited by: 1

Related to: 10