A39. South end of Valcour Island, Cystid Point, Valcour Fm. (Ordovician of the United States)

Where: Clinton County, New York (44.6° N, 73.4° W: paleocoordinates 28.1° S, 54.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Valcour Formation (Chazy Group), Chazyan (470.0 - 457.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; nodular, blue limestone and fine-grained shale

• Impure nodular limestone with a great quantity of fine shale.

Size classes: macrofossils, mesofossils

Primary reference: P. E. Raymond. 1906. The Chazy Formation and its fauna. Annals of the Carnegie Museum 3(4):498-596 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 172240: authorized by Björn Kröger, entered by Björn Kröger on 31.07.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Paracrinoidea
 Platycystitida - Platycystitidae
"Malocystites emmonsi" = Canadocystis emmonsi
"Malocystites emmonsi" = Canadocystis emmonsi Hudson 1905
Lingulata
 Lingulida - Obolidae
"Lingula columba" = Lingulella columba
"Lingula columba" = Lingulella columba Raymond 1905
Strophomenata
 Strophomenida - Furcitellidae
"Rafinesquina incrassata" = Dactylogonia incrassata
"Rafinesquina incrassata" = Dactylogonia incrassata Hall 1847
Rhynchonellata
 Rhynchonellida - Trigonirhynchiidae
"Camarotoechia plena" = Rostricellula plena, "Camarotoechia major" = Rostricellula major
"Camarotoechia plena" = Rostricellula plena Hall 1847
"Camarotoechia major" = Rostricellula major Raymond 1905
 Orthida - Plaesiomyidae
"Plaesiomys platys" = Multicostella platys
"Plaesiomys platys" = Multicostella platys Billings 1859
 Orthida - Hesperorthidae
"Orthis ignicula" = Hesperorthis ignicula
"Orthis ignicula" = Hesperorthis ignicula Raymond 1905
 Orthida - Plectorthidae
"Hebertella vulgaris" = Mimella vulgaris
"Hebertella vulgaris" = Mimella vulgaris Raymond 1911
Cephalopoda
 Oncocerida - Valcouroceratidae
"Orthoceras tenuiseptum" = Valcouroceras tenuiseptum
"Orthoceras tenuiseptum" = Valcouroceras tenuiseptum Ruedemann 1906
 Orthocerida - Orthoceratidae
Gastropoda
 Bellerophontida - Bucaniidae
Bucania sulcatina Emmons 1842 snail
 Euomphalina - Raphistomatidae
Raphistoma stamineum Hall 1847 snail
Bivalvia
 Myalinida - Ambonychiidae
"Ambonychia curvata" = Ambonychiopsis curvata, "Clionychia montrealensis" = Cleionychia montrealensis
"Ambonychia curvata" = Ambonychiopsis curvata Raymond 1905 clam
"Clionychia montrealensis" = Cleionychia montrealensis Billings 1859 clam
Ostracoda
 Hollinocopida - Eurychilinidae
Eurychilina latimarginata Raymond 1905 ostracod
 Leperditicopida - Leperditiidae
Leperditia canadensis Jones 1858 ostracod
Trilobita
 Corynexochida - Illaenidae
Thaleops ovata, "Illaenus globosus" = Stenopareia globosus
Thaleops ovata Conrad 1843 trilobite
"Illaenus globosus" = Stenopareia globosus Billings 1859 trilobite
 Phacopida - Pliomeridae
Pliomerops canadensis Billings 1859 trilobite
 Harpetida - Harpetidae
"Eoharpes ottawaensis" = Hibbertia valcourensis
"Eoharpes ottawaensis" = Hibbertia valcourensis Shaw 1968 trilobite
 Asaphida - Asaphidae
Isotelus harrisi Raymond 1905 trilobite
Scyphozoa
 Conulariida - Conulariidae
Conularia triangulata Raymond 1905 jellyfish