Isorthis community, Willowvale and Irondequoit Fms. (Silurian of the United States)

Where: New York (43.2° N, 77.6° W: paleocoordinates 24.6° S, 47.0° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Cycle VI zone, Llandovery (443.4 - 433.4 Ma)

• "lower Sil., upper Lland., cycle VI"

• group-level stratigraphic resolution

Environment/lithology: marine; limestone and shale

• "sh and crinoidal ls"

Size class: macrofossils

Primary reference: T. E. Bolton. 1957. Silurian stratigraphy and palæontology of the Niagara escarpment in Ontario. Geological Survey of Canada Memoir 289:1-145 [P. Wagner/P. Wagner/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 462: authorized by Jack Sepkoski, entered by Mike Sommers on 15.12.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Ziegler et al. 1971 unpublished. Gillette 1947, Bolton 1957."
Show authors, comments, and common names
Trilobita
 Corynexochida - Illaenidae
Bumastus sp.
Bumastus sp. Murchison 1839 trilobite
 Phacopida - Calymenidae
Calymene sp.
Calymene sp. Brongniart 1822 trilobite
 Phacopida - Dalmanitidae
Dalmanites sp.
Dalmanites sp. Barrande 1852 trilobite
Ostracoda
 Palaeocopida - Zygobolbidae
Mastigobolbina sp., Plethobolbina sp.
Mastigobolbina sp. Ulrich and Bassler 1923 ostracod
3 species
Plethobolbina sp. Ulrich and Bassler 1923 ostracod
Gymnolaemata
 Ctenostomata - Ropalonariidae
Ropalonaria sp.
Ropalonaria sp. Ulrich 1879
Stenolaemata
 Trepostomata - Heterotrypidae
Leioclema sp.
Leioclema sp. Ulrich 1882
 Cystoporata - Ceramoporidae
Ceramopora sp.
Ceramopora sp. Hall 1851
 Trepostomida - Monticuliporidae
Mesotrypa sp.
Mesotrypa sp. Ulrich 1893
Rhynchonellata
 Spiriferida - Cyrtiidae
Eospirifer sp.
Eospirifer sp. Schuchert 1913
 Spiriferida - Spiriferidae
Spirifer sp.
Spirifer sp. Sowerby 1818
4 species
 Spiriferida - Delthyrididae
Howellella sp.
Howellella sp. Kozlowski 1946
 Pentamerida - Parastrophinidae
Anastrophia sp.
Anastrophia sp. Hall 1867
 Pentamerida - Stricklandiidae
Stricklandia sp.
Stricklandia sp. Billings 1859
 Athyridida - Nucleospiridae
Nucleospira sp.
Nucleospira sp. Hall 1859
 Athyridida - Meristellidae
Whitfieldella sp.
Whitfieldella sp. Hall and Clarke 1893
4 species
 Athyridida - Anoplothecidae
Coelospira sp.
Coelospira sp. Hall 1863
 Atrypida - Atrypidae
Plectatrypa sp., Atrypa sp.
Plectatrypa sp. Schuchert and Cooper 1930
Atrypa sp. Dalman 1828
3 species
 Orthida - Dalmanellidae
"Parmorthis sp." = Resserella, Dalmanella sp.
"Parmorthis sp." = Resserella Bancroft 1928
Dalmanella sp. Hall and Clarke 1892
 Orthida - Hesperorthidae
Dolerorthis sp.
Dolerorthis sp. Schuchert and Cooper 1931
 Rhynchonellida - Camarotoechiidae
Camarotoechia sp.
Camarotoechia sp. Hall and Clarke 1893
 Rhynchonellida - Trigonirhynchiidae
Rhynchotreta sp.
Rhynchotreta sp. Hall 1879
3 species
Strophomenata
 Strophomenida - Leptostrophiidae
Protomegastrophia sp.
 Strophomenida - Rafinesquinidae
Leptaena sp.
Leptaena sp. Dalman 1828
 Strophomenida - Strophonellidae
Strophonella sp.
Strophonella sp. Hall 1879
2 species
 Strophomenida - Strophodontidae
"Strophodonta sp." = Strophomena (Strophodonta)
"Strophodonta sp." = Strophomena (Strophodonta) Hall 1852
originally entered as "Stropheodonta sp."
 Strophomenida - Sowerbyellidae
Sowerbyella sp., Plectodonta sp.
Sowerbyella sp. Jones 1928
Plectodonta sp. Kozlowski 1929
 Strophomenida - Chonetidae
Chonetes sp.
Chonetes sp. Fischer de Waldheim 1830
 Orthotetida - Chilidiopsidae
Fardenia sp.
Fardenia sp. Lamont 1935
 Orthotetida - Schuchertellidae
Schuchertella sp.
Schuchertella sp. Girty 1904
Gastropoda
 Euomphalina - Platyceratidae
Strophostylus sp., Cyclonema sp., Platyceras sp.
Strophostylus sp. Hall 1859 snail
Cyclonema sp. Hall 1852 snail
Platyceras sp. Conrad 1840 snail
Cephalopoda
 Orthocerida - Dawsonoceratidae
Dawsonoceras sp.
Dawsonoceras sp. Hyatt 1884
Bivalvia
 Solemyida - Ctenodontidae
Ctenodonta sp.
Ctenodonta sp. Salter 1852 clam
 Nuculanida - Cucullellidae
"Pyrenomoeus sp." = Nuculites
"Pyrenomoeus sp." = Nuculites Conrad 1841 clam
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
crinoids
Anthozoa
 Stauriida - Streptelasmatidae
Enterolasma sp.
Enterolasma sp. Simpson 1900 horn coral
 Favositida - Favositidae
Favosites sp.
Favosites sp. Lamarck 1816 tabulate coral