Yellow Point, Birchs Bay (C1) (Permian of Australia)

Where: Tasmania, Australia (43.2° S, 147.2° E: paleocoordinates 78.4° S, 142.5° E)

• coordinate based on unpublished field data

• outcrop-level geographic resolution

When: Abels Bay Formation, Wuchiapingian (259.9 - 254.2 Ma)

• Fossils occur throughout a few meters of section, but are concentrated in 38 cm thick bed. The Abels Bay Fm is the youngest marine Permian unit in Tasmanian, of late Lymingtonian age. Briggs (1998) correlated the late Lymingtonian with his mainland brachiopod zones, ranging from the Echinalosia wassi zone to the Echinalosia deari zone and with palynological zones APP4.3 and APP5. Radiometric calibration of these palynological zones by Laurie et al. (2016) suggests that APP4.3 is mid-Wuchiapingian and APP5 spans the late Wuchiapingian and Changhsingian. A Wuchiapingian age is assigned to the Abels Bay Formation here.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified siltstone

Size class: macrofossils

Preservation: mold/impression

Collection methods: All fossils figured herein are deposited in the fossil collections of the Geological Survey of Tasmania (GST) or the Geology Department, University of Tasmania (UTGF).

Primary reference: M. J. Clarke. 1987. Late Permian (late Lymingtonian = ?Kazanian) brachiopods from Tasmania. Alcheringa 11:261-289 [T. Olszewski/L. Fall/L. Fall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 51314: authorized by Tom Olszewski, entered by Leigh Fall on 02.06.2005, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Stenolaemata
 Trepostomida - Stenoporidae
Stenopora crinita Lonsdale 1845
Rhynchonellata
 Rhynchonellida - Wellerellidae
Plekonella acuta Campbell 1953
 Spiriferida - Ingelarellidae
Birchsella spinosa n. gen. n. sp., "Notospirifer minutus" = Mesopunctia minuta
Birchsella spinosa n. gen. n. sp. Clarke 1987
"Notospirifer minutus" = Mesopunctia minuta Campbell 1960
 Terebratulida - Dielasmatidae
 Terebratulida - Gillediidae
"Maorielasma globosum" = Maorielasma imperatum
"Maorielasma globosum" = Maorielasma imperatum Waterhouse 1964
 Spiriferinida - Syringothyrididae
Strophomenata
 Productida - Linoproductidae
 Productida - Strophalosiidae
"Wyndhamia ovalis" = Echinalosia ovalis
"Wyndhamia ovalis" = Echinalosia ovalis Maxwell 1954
Bivalvia
 Cardiida - Kalenteridae
Stutchburia cf. compressa Morris 1845 clam
 Cardiidia - Sanguinolitidae
Vacunella curvata Morris 1845 clam
 Pholadomyida - Megadesmidae
Megadesmus gryphoides de Koninck 1876 clam
"Megadesmus grandis" = Megadesmus (Cleobis) grandis Dana 1847 clam
Pleurikodonta elegans Runnegar 1965 clam
Astartila intrepida Dana 1847 clam
 Trigoniida - Schizodidae
Schizodus sp. King 1844 clam
 Pectinida - Heteropectinidae
Etheripecten leniusculus Dana 1847 scallop
 Ostreida - Pterineidae
Merismopteria macroptera Morris 1845 oyster
Gastropoda
 Bellerophontida - Euphemitidae
Warthia micromphala Morris 1845 snail
Dictyopteridiopsida
  -
Gangamopteris sp. McCoy 1875