Atrypa-Dicoelosia-Ramose Bryozoan Subcommunity of the Lower Rochester Shale at M (Silurian of the United States)

Where: Niagara County County, New York (43.1° N, 79.1° W)

• Paleocoordinates: 27.9° S, 81.5° W (Wright 2013)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Lewiston Member (Rochester Shale Formation), Wenlock (433.4 - 427.4 Ma)

• Collection is from Submember B of the Lewiston Member, 3-3.5 m above the base.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified, gray, calcareous mudstone and lithified, calcareous siltstone

• 2003:04:06 SEP environmental/tectonic/sequence calls based on field knowledge familiarity with stratigraphic context.
• This bryozoan rich community is associated with light to medium gray, calcareous mudstones. Associated lithologies include calcisiltites and lenticular calcarenites, rarely displaying upward fining, mudsheltering (matrix trapped in protected pockets beneath shells during winnowing) and/or starved ripple features. Brett (1983) considered that these coquinoid beds represent winnowed storm layers and suggested deposition within storm wave base.

Primary reference: C. E. Brett. 1999. Wenlockian fossil communities in New York State and adjacent areas: Paleontology and Paleoecology. In A. J. Boucot, J. D. Lawson (eds.), Paleocommunities: A Case Study from the Silurian and Lower Devonian 592-637 [M. Foote/K. Koverman/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 13050: authorized by Michael Foote, entered by Kimberly Koverman on 17.01.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Homeospira apriniformis
 Rhombifera - Cheirocrinidae
"Calceocrinus chrysalis" = Cheirocrinus chrysalis
"Calceocrinus chrysalis" = Cheirocrinus chrysalis Hall 1860
Crinoidea
 Inadunata -
Inadunata indet.
 Eustenocrinida - Acolocrinidae
Paracolocrinus paradoxicus
 Myelodactylida - Myelodactylidae
Crinobrachiatus brachiatus
 Calceocrinida - Calceocrinidae
Charactocrinus pustulosus, ? Eohalysiocrinus typus, Catatonocrinus halli
Charactocrinus pustulosus Brett 1981 Sea lily
 Flexibilia -
Flexibilia indet., Icthyocrinus laevis
 Sagenocrinida - Homalocrinidae
Asaphocrinus ornatus
 Sagenocrinida - Lecanocrinidae
Lecanocrinus macropetalus
 Dendrocrinida - Dendrocrinidae
Dendrocrinus longidactylus
Dendrocrinus longidactylus Hall 1852 Sea lily
 Diplobathrida - Dimerocrinitidae
Dimerocrinites sp.
Dimerocrinites sp. Phillips 1839 Sea lily
 Monobathrida - Eucalyptocrinitidae
Eucalyptocrinites caelatus
 Monobathrida - Patelliocrinidae
Macrostylocrinus ornatus
Trilobita
 Lichida - Lichidae
Arctinurus boltoni
Arctinurus boltoni Bigsby 1825 trilobite
 Corynexochida - Illaenidae
Bumastus ioxus
Bumastus ioxus Hall 1868 trilobite
 Phacopida - Dalmanitidae
Dalmanites limulurus
 Phacopida - Calymenidae
Calymene sp.
Calymene sp. Brongniart 1822 trilobite
Gastropoda
 Euomphalina - Platyceratidae
"Naticonema niagarensis" = Platyostoma niagarensis, Platyceras spp.
"Naticonema niagarensis" = Platyostoma niagarensis Hall 1852 snail
Platyceras spp. Conrad 1840 snail
Bivalvia
 Ostreida - Pterineidae
Cornellites emaceratus
Cephalopoda
 Orthocerida - Dawsonoceratidae
Dawsonoceras americanum
Polychaeta
  -
Machaeridia indet.
Sedentaria
 Sabellida - Serpulidae
Spirorbis sp.
Spirorbis sp. Daudin 1800
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
12 formas
Stenolaemata
  - Phylloporinidae
Phylloporina asperatostriata
 Cystoporata - Ceramoporidae
Coeloclema sp.
Coeloclema sp. Ulrich 1882
 Cystoporata - Fistuliporidae
Chilotrypa ostiolata
 Trepostomata - Halloporidae
Hallopora elegantula
 Cryptostomata - Rhinoporidae
Lichenalia concentrica
 Cryptostomata - Fenestellidae
Fenestella sp.
Fenestella sp. Lonsdale 1839
Craniata
 Craniida - Craniidae
Philhedra sp.
Philhedra sp. Koken 1889
 Craniopsida - Craniopsidae
Craniops sp.
Craniops sp. Hall 1859
Rhynchonellata
 Spiriferida - Cyrtiidae
Striispirifer niagarensis, Eospirifer radiatus
Eospirifer radiatus Sowerby 1834
 Spiriferida - Delthyrididae
Howellella crispa
Howellella crispa Hisinger 1827
 Spiriferida - Cyrtinopsidae
Boucotinskia sulcatus
 Rhynchonellida - Rhynchotrematidae
Stegerhynchus neglectum
 Rhynchonellida - Trigonirhynchiidae
Rhynchotreta americana
 Rhynchonellida - Eatoniidae
Diabolirhynchia cf. acinus
 Athyridida - Rhynchospirinidae
Trematospira camura
 Athyridida - Meristellidae
Whitfieldella nitida
 Pentamerida - Parastrophinidae
Anastrophia interplicata
 Orthida - Hesperorthidae
Flabellitesia flabellites
 Orthida - Dicoelosiidae
Dicoelosia biloba
Dicoelosia biloba Linnaeus 1758
 Orthida - Dalmanellidae
Resserella elegantula
 Orthida - Rhipidomellidae
Dalejina sp., Dalejina hybrida
Dalejina sp. Havlicek 1953
Dalejina hybrida Sowerby 1839
 Protorthida - Skenidiidae
Skenidioides pyramidalis
Skenidioides pyramidalis Twenhofel 1928
 Atrypida - Atrypinidae
Atrypina rugosa
 Atrypida - Atrypidae
Plectatrypa nodostriata, Atrypa ? reticularis
Atrypa ? reticularis Linnaeus 1758
Atrypa 'reticularis'
Chileata
 Dictyonellida - Eichwaldiidae
"Dictyonella corallifera" = Eodictyonella
"Dictyonella corallifera" = Eodictyonella
Strophomenata
 Orthotetida - Chilidiopsidae
"Coolinia subplana" = Fardenia (Coolinia)
"Coolinia subplana" = Fardenia (Coolinia)
 Strophomenida - Sowerbyellidae
"Eoplectodonta transversalis" = Eoplectodonta (Eoplectodonta) transversalis
"Eoplectodonta transversalis" = Eoplectodonta (Eoplectodonta) transversalis Wahlenberg 1818
 Strophomenida - Rafinesquinidae
Leptaena ? rhomboidalis
Leptaena ? rhomboidalis Wahlenberg 1818
Leptaena 'rhomboidalis'
Lophophorata
 Tentaculitida - Cornulitidae
Cornulites niagarensis, Cornulites spp.
Cornulites spp. Schlotheim 1820
Cornulites sp. A and sp. B
Anthozoa
 Favositida - Favositidae
Favosites parasiticus
Favosites parasiticus tabulate coral