PBDB Collection

Aegiria-Alveolitid Community, Yarwood Siltstone, Yass Syncline (Silurian of Australia)

Where: New South Wales, Australia (35.0° S, 149.0° E: paleocoordinates 0.1° S, 175.8° E)

• coordinate based on political unit

• basin-level geographic resolution

When: Yarwood Siltstone Member (Black Bog Formation), Ludfordian (425.6 - 423.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; calcareous siltstone and calcareous sandstone

• "Underlain by coralline Hume Limestone...Most of the Black Bog formation beneath Yarwood siltstone consists of structureless dark-gray siltstones and mudstones. [Increase in silt content from Hume to Black Bog.]...Lack of sedimentary structures...Boundary with Yarwood gradational..Change to a strongly bioturbated calcareous siltstone with a significant shelly fauna supports [inferred, gradual shallowing]....Many shells disarticulated...Assignment to moderate-energy BA 4 seems appropriate, perhaps toward the shallow end...open water below wave base but subject to storm activity."

• "siltstone...fauna is most abundant in lenses of decalcified fine sandstone and siltstone which show evidence of being current-winnowed, althought not strongly."

Size class: macrofossils

Collection methods: Abundances of trilobites and brachiopods for four localities given in table 14.1 These taxa, plus others mentioned in text, are included in faunal list.

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 25634: 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
-	Hollinanacea indet. Hollinanacea indet.
Crinoidea
-	Crinoidea indet. Crinoidea indet. Miller 1821 Sea lily
Pterobranchia
Dendroidea -	Dendroidea indet. Dendroidea indet. Nicholson 1872 graptolite
Conodonta
-	Conodonta indet. Conodonta indet. conodont
Craniata
Craniopsida - Craniopsidae	Craniops sp. Craniops sp. Hall 1859
Strophomenata
Orthotetida - Chilidiopsidae	Morinorhynchus oepiki Morinorhynchus oepiki
Strophomenida -	? Strophochonetes sp. ? Strophochonetes sp. Muir-Wood 1962
Strophomenida - Chonetidae	Chonetidae indet. Chonetidae indet. Bronn 1862
Strophomenida - Aegiromenidae	"Aegiria minuta" = Epelidoaegiria minuta "Aegiria minuta" = Epelidoaegiria minuta Mitchell 1923
Strophomenida - Strophodontidae	Pholidostrophia (Mesopholidostrophia) bendeninensis Pholidostrophia (Mesopholidostrophia) bendeninensis
Strophomenida - Leptostrophiidae	? Leptostrophia (Mitchellella) quadrata ? Leptostrophia (Mitchellella) quadrata
Strophomenida - Amphistrophiidae	Maoristrophia sp. Maoristrophia sp. Allan 1947
Strophomenida - Rafinesquinidae	Leptaena sp. Leptaena sp. Dalman 1828
Rhynchonellata
Pentamerida - Clorindidae	Barrandina cf. wilkinsoni Barrandina cf. wilkinsoni
Spiriferida - Delthyrididae	? Howellella sp. ? Howellella sp. Kozlowski 1946
Spiriferida - Reticulariidae	cf. Vadum sp., Spirinella ? caecistriata cf. Vadum sp. spiriferid cf. Vadum Spirinella ? caecistriata Johnston 1941
Spiriferida - Cyrtiidae	Striispirifer sp., Hedeina bowningensis Striispirifer sp. Cooper and Muir-Wood 1951 genus name in quotes Hedeina bowningensis
Athyridida - Nucleospiridae	Nucleospira sp. Nucleospira sp. Hall 1859
Athyridida - Anoplothecidae	? Coelospira sp. ? Coelospira sp. Hall 1863 "Coelospira &/or Atrypina"
Atrypida - Septatrypidae	Atrypoidea sp. Atrypoidea sp. Mitchell and Dun 1920
Atrypida - Punctatrypidae	Reticulatrypa ? pulchra Reticulatrypa ? pulchra
Atrypida - Atrypinidae	? Atrypina sp., ? Gracianella sp., Spirigerina marginalis ? Atrypina sp. Hall and Clarke 1893 "Coelospira &/or Atrypina" ? Gracianella sp. Johnson and Boucot 1967 Spirigerina marginalis Dalman 1828
Atrypida - Lissatrypidae	? Lissatrypa sp. ? Lissatrypa sp. Twenhofel 1914
Protorthida - Skenidiidae	Skenidioides sp. Skenidioides sp. Schuchert and Cooper 1931
Orthida -	Orthida indet. Orthida indet. Schuchert and Cooper 1932 Salopinid? n. gen.
Orthida - Draboviidae	Salopina cf. mediocostata Salopina cf. mediocostata
Orthida - Dicoelosiidae	Dicoelosia sp. Dicoelosia sp. King 1850 [entered as Dicoleosia sp.]
Orthida - Dalmanellidae	? Isorthis (? Protocortezorthis) sp. ? Isorthis (? Protocortezorthis) sp. Walmsley and Boucot 1975
Orthida - Hesperorthidae	Dolerorthis sp. Dolerorthis sp. Schuchert and Cooper 1931

Lophophorata -	Tentaculitida indet. Tentaculitida indet. Ljaschenko 1955
Bryozoa
-	Bryozoa indet. Bryozoa indet. Ehrenberg 1831
Stenolaemata
Cryptostomata - Fenestellidae	Fenestella cf. yassensis Fenestella cf. yassensis
Cephalopoda
Nautiloidea -	Nautiloidea indet. Nautiloidea indet. Agassiz 1847 nautiloid
Gastropoda
-	Gastropoda indet. Gastropoda indet. Cuvier 1795 snail
Bivalvia
-	"Pelecypoda indet." = Bivalvia "Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
Ostracoda
Beyrichiacea -	Beyrichiacea indet. Beyrichiacea indet. Matthew 1886 ostracod
Podocopa -	Podocopida indet., Platycopida indet. Podocopida indet. Sars 1866 ostracod Platycopida indet. Sars 1866 ostracod
Trilobita
Corynexochida - Styginidae	Australoscutellum longospinifex, Kosovopeltis jenkinsi Australoscutellum longospinifex trilobite Kosovopeltis jenkinsi trilobite
Proetida - Proetidae	Prantlia yassensis Prantlia yassensis Etheridge and Mitchell 1892 trilobite
Proetida - Scharyiidae	Scharyia ritchiei Scharyia ritchiei trilobite
Proetida - Tropidocoryphidae	Decoroproetus australis Decoroproetus australis trilobite
Proetida - Otarionidae	Otarion horani Otarion horani Etheridge and Mitchell 1893 trilobite
Phacopida - Calymenidae	"Apocalymene sp." = Gravicalymene, Sthenarocalymene australis "Apocalymene sp." = Gravicalymene Shirley 1936 trilobite Sthenarocalymene australis trilobite
Phacopida - Encrinuridae	Staurocephalus mitchelli, "Batocara bowningi" = Batocara, "Pacificurus sp." = Batocara Staurocephalus mitchelli trilobite "Batocara bowningi" = Batocara trilobite "Pacificurus sp." = Batocara Strusz 1980 trilobite
Phacopida - Cheiruridae	Crotalocephalus silverdalensis, Sphaerexochus ? lorum Crotalocephalus silverdalensis trilobite Sphaerexochus ? lorum trilobite
Harpetida - Harpetidae	Scotoharpes trinucleoides Scotoharpes trinucleoides Etheridge and Mitchell 1917 trilobite
Odontopleurida - Odontopleuridae	Dudleyaspis bowningensis Dudleyaspis bowningensis trilobite
Anthozoa
Rugosa -	Zenophilia walli Zenophilia walli horn coral
Cystiphyllida - Tryplasmatidae	Tryplasma ? derrengullense Tryplasma ? derrengullense horn coral
Stauriida - Mucophyllidae	Mucophyllum sp. Mucophyllum sp. Etheridge 1894 horn coral
Stauriida - Arachnophyllidae	Idiophyllum patulum Idiophyllum patulum horn coral
Stauriida - Lykophyllidae	Phaulactis shearsbyi Phaulactis shearsbyi horn coral
Favositida - Favositidae	Favosites sp. Favosites sp. Lamarck 1816 tabulate coral
Favositida - Alveolitidae	Kitakamiia sp. Kitakamiia sp. Sugiyama 1940 tabulate coral
Heliolitida - Heliolitidae	Heliolites sp. Heliolites sp. Dana 1846 tabulate coral