Highgate Fm., lower part, Tremadocian ( of the United States)

Where: Vermont (44.5° N, 73.2° W: paleocoordinates 31.2° S, 66.5° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Highgate Formation, Tremadoc (486.5 - 477.7 Ma)

• "Tremadocian"

Environment/lithology: marine; black limestone

• "dolomitic congl and black, xtaline fossiliferous ls., thin-bedded (1/4-1"); slate above- some slumped ls? BA3-4, BA4 [circled] 5? geosynclinal."

Size class: macrofossils

Primary reference: A. B. Shaw. 1958. Stratigraphy and structure of the St. Albans Area, northwestern Vermont. Geological Society America Bulletin 69:519-568 [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 277: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "A.B.Shaw, 1958. Stratigraphy and structure of the St. Albans Area, northwestern Vermont. GSA Bull. 69:519-568"
Show authors, comments, and common names
Pterobranchia
 Dendroidea - Acanthograptidae
Dictyonema sp.
Dictyonema sp. Hall 1851 graptolite
Rhynchonellata
 Pentamerida - Huenellidae
Glyptotrophia sp.
 Pentamerida - Clarkellidae
Syntrophina sp.
 Orthida - Orthidae
Orthis sp.
Orthis sp. Dalman 1828
 Orthida - Archaeorthidae
Archaeorthis sp.
Archaeorthis sp. Schuchert and Cooper 1931
 Orthida - Eoorthidae
Apheoorthis sp.
Apheoorthis sp. Ulrich and Cooper 1936
Gymnolaemata
 Ctenostomata - Vinellidae
Heteronema sp.
Heteronema sp. Ulrich and Bassler 1904
"unrecognizable"
Polychaeta
 Serpulimorpha -
Serpulites sp.
Gastropoda
 Eogastropoda - Sinuopeidae
"Dirhachopea sp." = Schizopea
"Dirhachopea sp." = Schizopea Butts 1926 snail
Artiopoda
 Agnostida - Metagnostidae
Geragnostus sp.
Geragnostus sp. Howell 1935
 Agnostida - Agnostidae
Homagnostus sp.
Homagnostus sp. Howell 1935
 Agnostida - Diplagnostidae
"Pseudagnostus sp." = Pseudagnostus, "Litagnostus sp." = Pseudagnostus
"Pseudagnostus sp." = Pseudagnostus Jaekel 1909
"Litagnostus sp." = Pseudagnostus Jaekel 1909
Trilobita
 Corynexochida - Missisquoiidae
"Missisquoia sp." = Parakoldinioidia
"Missisquoia sp." = Parakoldinioidia Endo 1937 trilobite
 Olenida - Olenidae
Highgatella sp., Plicatolina sp., Parabolinella sp.
Highgatella sp. Shaw 1955 trilobite
Plicatolina sp. Shaw 1951 trilobite
Parabolinella sp. Brögger 1882 trilobite
 Asaphida - Nileidae
Symphysurina sp.
Symphysurina sp. Ulrich 1924 trilobite
 Ptychopariida - Norwoodiidae
Hardyoides sp.
Hardyoides sp. Kobayashi 1938 trilobite