Rylstone: Roadian, Australia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rostroconchia - Conocardiida - Bransoniidae
Conocardium robustum n. sp. Fletcher 1943
recombined as Bransonia robustum
Conocardium australe (M'Coy 1847)
recombined as Bransonia australe
Strophomenata - Productida - Linoproductidae
Terrakea rylstonensis n. sp. Briggs 1998
Briggs 1998
(1 measurement)
Rhynchonellata - Terebratulida - Gillediidae
Gilledia ulladullensis Campbell 1965
Campbell 1965
recombined as Paragilledia ulladullensis
ssp. alta (3 measurements)
Rhynchonellata - Terebratulida - Dielasmatidae
Fletcherithyris parkesi Campbell 1965
Campbell 1965
Rhynchonellata - Spiriferinida - Syringothyrididae
Pseudosyrinx plicata n. sp. Armstrong 1970
Armstrong 1970
recombined as Sulcicosta plicata
see common names

Geography
Country:Australia State/province:New South Wales County:Rylstone
Coordinates: 32.8° South, 150.0° East (view map)
Paleocoordinates:68.1° South, 158.6° East
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Permian Epoch:Guadalupian
Stage:Roadian 10 m.y. bin:Permian 3
Key time interval:Roadian Brachiopod zone: Echinalosia maxwelli
Age range of interval:273.01000 - 266.90000 m.y. ago
Stratigraphy
Formation:Snapper Point
Stratigraphic resolution:group of beds
Stratigraphy comments: Listed as "Upper Marine Series" in Fletcher (1943), but classic "Rylstone" collection comes from locality where "Capertee Formation" (correlative of the Snapper Point, according to Briggs, 1998) unconformably overlies Devonian. Brachiopods suggest the Echinalosia maxwelli brachiopod zone, equivalent to the upper part of APP3.2 or lower APP3.3 palynomorph zone. Laurie et al. (2016) dated zircons from the Rowan Formation in the Sydney Basin (in the underlying upper Echinalosia preovalis zone, or upper APP3.2) as 271.60 and 271.89 Ma, constraining its upper part to Roadian, given a Roadian-Wordian boundary around 266.9 Ma (Wu et al., 2020). Strata in Western Australia assigned to APP4.1 yielded U-Pb ages of 269.25 Ma or younger, constraining the upper boundary of APP3.3 to the late Roadian (Laurie et al. 2016). As a result, APP3.3 appears to fall entirely within the Roadian. As a result, the E. maxwelli zone is most likely Roadian.
Lithology and environment
Primary lithology: lithified mudstone
Environment:coastal indet.
Taphonomy
Modes of preservation:mold/impression
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Taxonomic list comments:Australian Museum, Sydney
Metadata
Database number:98080
Authorizer:P. Wagner, M. Clapham Enterer:P. Wagner, M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2010-09-19 17:13:05 Last modified:2020-05-25 11:56:07
Access level:the public Released:2010-09-19 17:13:05
Creative Commons license:CC BY
Reference information

Primary reference:
15909. H. O. Fletcher. 1943. The genus Conocardium from Australian Palaeozoic rocks. Records of the Australian Museum 21(4):231-243 [P. Wagner/P. Wagner/P. Wagner]

Secondary references:

27376 J. Armstrong. 1970. Syringothyrid brachiopods from the Permian of eastern Australia. Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 136(2):135-165 [M. Clapham/M. Clapham/M. Clapham]
27370 D. J. C. Briggs. 1998. Permian Productidina and Strophalosiidina from the Sydney-Bowen Basin and New England Orogen: systematics and biostratigraphic significance. Memoirs of the Association of Australasian Palaeontologists 19:1-258 [M. Clapham/M. Clapham/M. Clapham]
14254 K. S. W. Campbell. 1965. Australian Permian terebratuloids. Bureau of Mineral Resources Geology and Geophysics Bulletin 68:3-146 [T. Olszewski/L. Fall/M. Clapham]