Ptychaspis-Prosaukia zone, Franconia Fm., Hudson Mbr. (Cambrian of the United States)

Where: Wisconsin (44.5° N, 89.6° W: paleocoordinates 22.2° S, 88.0° W)

• coordinate based on political unit

When: Ptychaspis - Prosaukia zone, Hudson Member (Franconia Formation), Cambrian (538.8 - 485.4 Ma)

• "Ptychaspis-Prosaukia zone, lower Hudson Mbr."

• group of beds-level stratigraphic resolution

Environment/lithology: marine; burrowed, glauconitic lithology not reported

• "40-50 ft., variable lithology: light colored ss, glauconitic ss, dolomitic sltst; worm burrows; some x-lamination and congl. Nearshore (BA1?), cratonic"

Size class: macrofossils

Primary reference: W. H. Twenhofel, G. O. Raasch, and F. T. Thwaites. 1935. Cambrian strata of Wisconsin. Geological Society of America Bulletin 46(11):1687-1744 [P. Wagner/P. Wagner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 250: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Twenhofel et al. 1935"
Show authors, comments, and common names
unclassified
  -
Prozacompsus sp.
Strophomenata
 Billingsellida - Billingsellidae
Billingsella sp.
Billingsella sp. Hall and Clarke 1892
Artiopoda
 Agnostida - Diplagnostidae
"Pseudagnostus sp." = Pseudagnostus, "Litagnostus sp." = Pseudagnostus
"Pseudagnostus sp." = Pseudagnostus Jaekel 1909
"Litagnostus sp." = Pseudagnostus Jaekel 1909
Trilobita
 Ptychopariida - Conocoryphidae
"Conocephalites sp." = Conocoryphe
"Conocephalites sp." = Conocoryphe Hawle and Corda 1847 trilobite
 Asaphida - Ptychaspididae
Ptychaspis sp.
Ptychaspis sp. Hall 1863 trilobite
 Asaphida - Dikelocephalidae
Monocheilus sp.
Monocheilus sp. Resser 1937 trilobite
 Olenida - Idahoiidae
"Idahoia sp." = Saratogia, Wilbernia sp.
"Idahoia sp." = Saratogia Walcott 1916 trilobite
Wilbernia sp. Walcott 1924 trilobite
 Redlichiida - Ellipsocephalidae
Ellipsocephalus sp.
Ellipsocephalus sp. Zenker 1833 trilobite