Gorman Fm., zones d-g (Ordovician of the United States)

Where: Texas (30.3° N, 97.7° W: paleocoordinates 21.7° S, 88.9° W)

• coordinate based on political unit

When: Gorman Formation, Early/Lower Ordovician (485.4 - 470.0 Ma)

• "L. Ord. Zones D-G"

Environment/lithology: peritidal; dolomite

• "dolomitic, sandy in part. peritidal? BA1"

Size class: macrofossils

Primary reference: P. E. Cloud, V. E. Barnes, and W. H. Haas. 1957. Devonian-Mississippian Transition in Central Texas. Geological Society America Bulletin 68(7):807-816 [M. Uhen/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 283: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Cloud and Barnes 1957"
Trilobita
 Aulacopleurida - Hystricuridae
Hystricurus sp. Raymond 1913 trilobite
Rhynchonellata
 Pentamerida - Clarkellidae
Gastropoda
 Euomphalina - Macluritidae
Macluritella sp. Kirk 1927 snail
originally "Lytospira"; PJW3
 Euomphalina - Ophiletidae
Lecanospira sp. Butts 1926 snail
Ophileta sp. Vanuxem 1842 snail
 Eogastropoda - Sinuopeidae
"Rhombella sp." = Euconia, "Chepultapecia sp." = Sinuopea
"Rhombella sp." = Euconia Ulrich and Scofield 1897 snail
"Chepultapecia sp." = Sinuopea Ulrich 1911 snail
 Murchisoniina - Hormotomidae
Hormotoma sp. Salter 1859 snail
Plethospira sp. Ulrich and Scofield 1897 snail
Tergomya
 Tryblidiida - Tryblidiidae
"Propilina sp." = Proplina
"Propilina sp." = Proplina Kobayashi 1933
originally entered as "Proplina sp."
Cephalopoda
 Ellesmerocerida - Ellesmeroceratidae
Burenoceras sp. Ulrich and Foerste 1931
 Endocerida - Proterocameroceratidae
Clitendoceras sp. Ulrich and Foerste 1936
Mcqueenoceras sp. Ulrich and Foerste 1936
 Endocerida - Piloceratidae
Piloceras sp. Obata 1939
Demospongea
 Lithistida - Anthaspidellidae
Archaeoscyphia sp. Hinde 1889 demosponge