New colonial acritarch Involusphaeridium gutschicki gen. et sp. nov. from the Lower Sappington Formation (Upper Famennian), western Montana, USA

FILIPIAK PAWEL; KONDAS MARCELINA; DI PASQUO MERCEDES; BEVERLY RICE; P.T. DOUGHTY; GRADER GEORGE W.; ISAACSON PETER

REVIEW OF PALAEOBOTANY AND PALYNOLOGY

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2020 vol. 284

0034-6667

Filipiak, A., Kondas, M., di Pasquo, M., Rice, B., Doughty, T., Grader, G., Isaacson, P., 2020. New colonial acritarch Involusphaeridium gutschicki gen. et sp. nov. from the Lower Sappington Formation (Upper Famennian), western Montana, USA. Review of Palaeobotany and Palynology 284 (2021) 104344 (submitted dec 2019, revision april 2020, accepted, october 2020). https://doi.org/10.1016/j.revpalbo.2020.104344Palynological investigation carried on the samples from the Unit 1 of the Sappington Formation (Upper Famennian, Montana, USA) reveals a presence of rich phytoplankton and microflora assemblages. The presence of spheroidal vesicles approx. 20 μm in diameter having a rigid smooth wall and frequently arranged in clusters connected by an external coating are proposed as a new taxon named Involusphaeridium gutschicki gen. et sp. nov. The coating on individual vesicles and colonies of I. gutschicki gen. et sp. nov. suggests a link with algal or fungal groups but also, with the eggs of arthropods. Hence, it is considered as incertae sedis (acritarch group).