Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: biostratigraphy, palaeobiogeography, and systematicsShow others and affiliations
2021 (English)In: Acta Palaeontologica Polonica, ISSN 0567-7920, E-ISSN 1732-2421, Vol. 66, p. 207-229Article in journal (Refereed) Published
Abstract [en]
Cambrian Series 2 shelly fossils from thick carbonate successions in East Antarctica have received limited systematic treatment through the 20th century. Described here are the East Antarctic camenellan tommotiids from the Shackleton Limestone in the Central Transantarctic Mountains and the Schneider Hills limestone in the Argentina Range. This material comes from both newly sampled collections and incompletely described material from older collections. The assemblage supports correlation to the Dailyatia odyssei Zone and Pararaia janeae Trilobite Zone of South Australia, with the newly examined specimens of Dailyatia decobruta from the Shackleton Limestone providing direct correlation to the Mernmerna Formation of the Ikara-Flinders Ranges and White Point Conglomerate of Kangaroo Island. These East Antarctic assemblages include five species referred to Dailyatia, in addition to an undetermined kennardiid species and fragments of the problematic Shetlandia multiplicata. The results further corroborate the notion that fossiliferous carbonate clasts found on King George Island were sourced from the same carbonate shelf as the Shackleton Limestone, with the taxon S. multiplicata found in both units. The Schneider Hills limestone in the Argentina Range has yielded sclerites of Dailyatia icari sp. nov., currently only known from this location.
Place, publisher, year, edition, pages
Instytut Paleobiologii PAN , 2021. Vol. 66, p. 207-229
Keywords [en]
Tommotiida, Dailyatia, biostratigraphy, palaeobiogeography, Cambrian, Central Transantarctic Mountains
National Category
Geology Other Earth and Related Environmental Sciences
Research subject
The changing Earth; Diversity of life
Identifiers
URN: urn:nbn:se:nrm:diva-4300DOI: 10.4202/app.00758.2020OAI: oai:DiVA.org:nrm-4300DiVA, id: diva2:1613148
Funder
Swedish Research Council, VR 2009-4395Swedish Research Council, 2012-1658Swedish Research Council, VR 2010-6176
Note
The fieldwork in Antarctica was supported by operational support for polarresearch (RFI Polar VR 2010-6176) and the Swedish Polar Secretariatin collaboration with the United States Antarctic Program and USNational Science Foundation (NSF). Glenn A. Brock was supported inAntarctica by the Trans-Antarctic Association.
2021-11-222021-11-222021-12-07Bibliographically approved