R17 (Ordovician of the United States)

Where: Vermont (44.9° N, 73.3° W: paleocoordinates 28.6° S, 56.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Valcour Formation (Chazy Group), Whiterockian (471.8 - 457.5 Ma)

Environment/lithology: reef rocks

Size classes: macrofossils, mesofossils

Reposited in the NYSM

Primary reference: F.C. Shaw. 1968. Early Middle Ordovician (Chazy) trilobites of New York. New York State Museum and Science Service Memoir 17:1-163 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 103289: authorized by Melanie Hopkins, entered by Melanie Hopkins on 25.01.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

 Corynexochida - Illaenidae
Hyboaspis depressa Raymond 1925 trilobite
"Bumastus (Bumastus) globosus" = Stenopareia globosus Billings 1859 trilobite
Platillaenus erastusi Raymond 1905 trilobite
 Phacopida - Pliomeridae
Pliomerops canadensis Billings 1859 trilobite
 Ptychopariida - Raymondinidae
Glaphurus pustulatus Walcott 1877 trilobite
Glaphurina lamottensis Ulrich 1930 trilobite
 Asaphida - Asaphidae
Isotelus harrisi Raymond 1905 trilobite
Nileoides perkinsi Raymond 1910 trilobite