PB72 (Ordovician of the United States)

Where: New York (44.6° N, 73.4° W: paleocoordinates 28.8° S, 56.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

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

Environment/lithology: lithified, silty limestone and lithified dolomite

• "Same lithology [as silty dolomite laminated limestone with several thin calcarenite stringers]."

Size classes: macrofossils, mesofossils

Preservation: replaced with silica

Reposited in the NYSM

Collection methods: chemical,

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 103000: authorized by Melanie Hopkins, entered by Melanie Hopkins on 21.01.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

 Aulacopleurida - Aulacopleuridae
Otarion spinicaudatum Shaw 1968 trilobite
 Phacopida - Pterygometopidae
Calyptaulax annulata Raymond 1905 trilobite
 Phacopida - Encrinuridae
Cybeloides prima Narraway and Raymond 1906 trilobite
 Phacopida - Cheiruridae
Sphaerexochus valcourensis Shaw and Bolton 2011 trilobite
 Proetida - Dimeropygidae
Dimeropyge clintonensis Shaw 1968 trilobite
 Asaphida - Asaphidae
Isotelus harrisi Raymond 1905 trilobite
 Asaphida - Raphiophoridae
Lonchodomas chaziensis Shaw 1968 trilobite