2002RB32 (Silurian of the United States)

Also known as talus blocks derived from a horizon near the top of the wall face at the northwest corner of a large quarry,

Where: Alaska (55.8° N, 133.0° W: paleocoordinates 6.5° S, 90.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

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

• formation-level stratigraphic resolution

Environment/lithology: lithified, silty wackestone and packstone

• a silty wackestone to packstone

Size class: macrofossils

Preservation: original silica, replaced with silica

Reposited in the USNM

Collection methods: bulk, chemical, acetic,

Primary reference: D. M. Rohr and R. B. Blodgett. 2008. Silurian Gastropoda from the Alexander terrane, southeast Alaska. Geological Society of America Special Paper 442:51-61 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 85025: authorized by Pete Wagner, entered by Pete Wagner on 21.11.2008, edited by Sarah Kolbe

Creative Commons license: CC BY (attribution)

Taxonomic list

• The Heceta Limestone contains a rich megafauna, some elements of which have previously been described and/or illustrated elsewhere: brachiopods (Kirk, 1922, 1925, 1926; Kirk and Amsden, 1952; Savage, 1989); sphinctozoan sponges (Rigby et al., 1994); and corals (Oliver, 1964; Oliver et al., 1975). However, the greater part of the megafauna remains undescribed to date. Elements currently undergoing further study include brachiopods (Boucot and Blodgett), scaphopods (Rohr and Blodgett), and corals (A.E.H. Pedder). Calcareous algae are extremely common in the algal (microbial) reef complexes of the Heceta Limestone (Riding and Soja, 1993; Soja and Riding, 1993).
Gastropoda
 Euomphalina - Euomphalidae
"Bathmopterus liratus" = Euomphalopterus liratus
"Bathmopterus liratus" = Euomphalopterus liratus Kirk 1928 snail
 Euomphalina - Holopeidae
"Pachystrophia gotlandica" = Pachystrophia gotlandicus
"Pachystrophia gotlandica" = Pachystrophia gotlandicus Lindström 1884 snail
 Euomphalina - Oriostomatidae
Beraunia bohemica Perner 1903 snail
Beraunia bifrons Perner 1903 snail
Hecetastoma gehrelsi n. gen. n. sp. Rohr and Blodgett 2008 snail
 Bellerophontida - Bellerophontidae
"Retispira aff. volgulica" = Bucanopsis volgulica
"Retispira aff. volgulica" = Bucanopsis volgulica Chernyshev 1893 snail
 Murchisoniina - Plethospiridae
Kirkospira glacialis, "Baichtalia tongassensis n. gen. n. sp." = Kirkospira tongassensis
Kirkospira glacialis Rohr and Blodgett 2001 snail
"Baichtalia tongassensis n. gen. n. sp." = Kirkospira tongassensis Rohr and Blodgett 2008 snail
 Murchisoniina - Hormotomidae
Coelocaulus karlae Rohr et al. 2003 snail
Medfracaulus turriformis Chernyshev 1893 snail
Scaphopoda
 Dentaliida - Laevidentaliidae
 Dentaliida - Dentaliidae
Dentalium hecetaensis Rohr et al. 2006 tusk shell