2004R-1, south side of logging road, Twin Mountains area, Prince Wales Island (Silurian of the United States)

Where: Alaska (55.8° N, 133.1° W: paleocoordinates 6.5° S, 90.4° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Heceta Limestone Formation, Ludlow (427.4 - 423.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: wackestone

• bedded wackestone to packstone

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

Primary reference: D. M. Rohr, R. B. Blodgett, and J. Frýda. 2008. Silurian Gastropoda from Southeastern and West-Central Alaska. Journal of Paleontology 82(3):604-611 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 80381: authorized by Pete Wagner, entered by Pete Wagner on 16.04.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Atrypida -
Atrypoidea sp. Gill 1871
 Atrypida - Atrypidae
Atrypa sp. Dalman 1828
Gastropoda
 Euomphalina - Oriostomatidae
Australonema sp. Tassell 1980 snail
 Euomphalina - Euomphalidae
Spinicharybdis boucoti n. sp. Rohr et al. 2008 snail
Spinicharybdis krizi n. sp. Rohr et al. 2008 snail
 Euomphalina - Holopeidae
Haplospira craigi n. sp., "Pachystrophia cf. gotlandica" = Pachystrophia gotlandicus
Haplospira craigi n. sp. Rohr et al. 2008 snail
"Pachystrophia cf. gotlandica" = Pachystrophia gotlandicus Lindström 1884 snail
 Murchisoniina - Palaeozygopleuridae
Medfrazyga gilmulli n. sp. Rohr et al. 2008 snail
 Murchisoniina - Murchisoniidae
Morania wagneri n. sp. Rohr et al. 2008 snail
"over 1000 specimens"
Anthozoa
 Cystiphyllida - Goniophyllidae
? Rhizophyllum sp. Lindström 1866 horn coral