PBDB Collection

Barrandina-Atrypoidea-Spirinella Comm., Barrandella Shale, Yass Syncline (Silurian of Australia)

Where: Australian Capital Territory, Australia (34.8° S, 148.9° E: paleocoordinates 2.3° N, 175.4° E)

• coordinate based on political unit

• basin-level geographic resolution

When: Barrandella Shale Member (Silverdale Formation), Gorstian (427.4 - 425.6 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; mudstone and siltstone

• "In the Barrandella Shale there is a gradual shallowing upwards, with the appearance of thin limestone beds near to top, transitional to the overlying biostromal Hume Limestone, which contains the BA 3 Favosites-massive stromatoporoid community...It would appear that the inception of the Barrandella represents transgression northwards at end of the shallow-water Bowspring Limestone, with the upper layers representing a gradual return to shallow conditions. [Fossils generally well preserved, not disturbed]. Thus the environment would appear to have been sheltered and of moderate depth; predominantly quiet water inner BA 4 but extending into somewhat shallower (and a little more agitated?) water, deep BA 3."

• "fossils scattered through upwards of twenty meters of finely fractured mudstone...The rocks are predominantly mudstones and fine siltstones, infrequently laminated, and are not ripple-marked; there are no layers of shell hash, and many of the shelly fossils are undamaged..."

Size class: macrofossils

Collection methods: Community known from elsewhere, geographically and stratigraphically, but these occurrences are not included in this collection (they will be entered as separate collections).

Primary reference: D. L. Strusz and M. J. Garratt. 1999. Australian communities. In A. J. Boucot, J. D. Lawson (eds.), Paleocommunities - a case study from the Silurian and Lower Devonian 177-199 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 25639: authorized by Michael Foote, entered by Michael Foote on 19.09.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

unclassified
-	Morinorhynchyus ? oepiki, Blastozoa indet. Morinorhynchyus ? oepiki Blastozoa indet. Sprinkle 1973 undetermined cystoids
Crinoidea
Pisocrinida - Pisocrinidae	? Pisocrinus yassensis ? Pisocrinus yassensis Sea lily
Cephalopoda
Nautiloidea -	Nautiloidea indet. Nautiloidea indet. Agassiz 1847 nautiloid small, straight forms
Rhynchonellata
Pentamerida -	Pentamerida indet. Pentamerida indet. Schuchert and Cooper 1931
Pentamerida - Clorindidae	Barrandina wilkinsoni Barrandina wilkinsoni
Spiriferida - Delthyrididae	Howellella nucula Howellella nucula
Spiriferida - Reticulariidae	Spirinella caecistriata Spirinella caecistriata Johnston 1941
Spiriferida - Cyrtiidae	Striispirifer plicatellus Striispirifer plicatellus Linnaeus 1758 name in quotes
Atrypida - Punctatrypidae	Reticulatrypa pulchra Reticulatrypa pulchra
Atrypida - Atrypidae	Atrypa cf. reticularis Atrypa cf. reticularis Linnaeus 1758
Atrypida - Atrypinidae	Spirigerina sp. Spirigerina sp. d'Orbigny 1849
Atrypida - Septatrypidae	Atrypoidea australis Atrypoidea australis Dun 1904
Athyridida - Retziellidae	Retziella capricornae Retziella capricornae
Athyridida - Anoplothecidae	Coelospira sp. Coelospira sp. Hall 1863
Orthida - Dicoelosiidae	Dicoelosia sp. Dicoelosia sp. King 1850 [entered as Dicoleosia sp.]
Orthida - Draboviidae	Salopina cf. mediocostata Salopina cf. mediocostata
Strophomenata
Strophomenida - Rafinesquinidae	Leptaena sp. Leptaena sp. Dalman 1828
Strophomenida - Stropheodontidae	Stropheodontidae indet. Stropheodontidae indet. Caster 1939
Strophomenida - Aegiromenidae	Aegiria sp. Aegiria sp. Opik 1933
Bryozoa
-	Bryozoa indet. Bryozoa indet. Ehrenberg 1831 ramose forms
Stenolaemata
Cryptostomata - Fenestellidae	Fenestella yassensis Fenestella yassensis
Trilobita
Proetida - Proetidae	Prantlia yassensis Prantlia yassensis Etheridge and Mitchell 1892 trilobite
Odontopleurida - Odontopleuridae	Ceratocephala vogdesi Ceratocephala vogdesi trilobite
Phacopida - Calymenidae	Sthenarocalymene ? australis Sthenarocalymene ? australis trilobite
Phacopida - Cheiruridae	Crotalocephalus silverdalensis Crotalocephalus silverdalensis trilobite
Phacopida - Encrinuridae	Pacificurus mitchelli Pacificurus mitchelli Foerste 1888 trilobite
Anthozoa
Cystiphyllida - Tryplasmatidae	Tryplasma derrengullenense, Aphyllum delicatulum, Aphyllum lonsdalei Tryplasma derrengullenense horn coral Aphyllum delicatulum horn coral Aphyllum lonsdalei horn coral
Cystiphyllida - Goniophyllidae	Rhizophyllum interpunctatum, Rhizophyllum yassense, Rhizophyllum brachiatum Rhizophyllum interpunctatum horn coral Rhizophyllum yassense horn coral Rhizophyllum brachiatum horn coral
Stauriida - Lykophyllidae	Phaulactis shearsbyi Phaulactis shearsbyi horn coral
Stauriida - Arachnophyllidae	Idiophyllum patulum Idiophyllum patulum horn coral
Stauriida - Entelophyllidae	Entelophyllum yassense Entelophyllum yassense horn coral
Stauriida - Mucophyllidae	Mucophyllum crateroides Mucophyllum crateroides horn coral
Stauriida - Ptenophyllidae	Toquimaphyllum spongophylloides, ? Toquimaphyllum shearsbi Toquimaphyllum spongophylloides horn coral ? Toquimaphyllum shearsbi horn coral
Stauriida - Pycnostylidae	Pycnostylus congregationis Pycnostylus congregationis horn coral
Heliolitida - Heliolitidae	Heliolites daintreei Heliolites daintreei tabulate coral
Favositida - Favositidae	Favosites sp. Favosites sp. Lamarck 1816 tabulate coral
Stromatoporoidea
Stromatoporoidea -	Stromatoporoidea indet. Stromatoporoidea indet. stromatoporoid sponge