Kasaan Island (Leptathyris Community) (Devonian of the United States)

Where: Alaska (55.5° N, 132.3° W: paleocoordinates 18.4° S, 83.8° W)

• outcrop-level geographic resolution

When: gronbergi conodont zone, Early/Lower Emsian (409.1 - 402.5 Ma)

• section is 244.6 m

• formation-level stratigraphic resolution

Environment/lithology: shallow subtidal; wackestone

• "medium to thin-bedded wackestones... abundance of micrite... well-preserved, small shells... quiet-water environment... shallow subtidal zone"

Primary reference: C. M. Soja. 1988. Early Devonian benthic communities of the Alexander Terrane, southeastern Alaska. Lethaia 21:319-338 [J. Alroy/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 3476: authorized by John Alroy, entered by John Alroy on 02.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• composite of six collections; abundance data only given for brachiopods; total number of specimens 247
Show authors, comments, and common names
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
Strophomenata
 Strophomenida - Amphistrophiidae
Mesodouvillina (Mesodouvillina) sp.
Mesodouvillina (Mesodouvillina) sp. Williams 1950
M. (Mesodouvillina)
Rhynchonellata
 Spiriferida - Delthyrididae
Howellella nucula
Howellella nucula
"H. nucula alaskensis"
 Spiriferida - Reticulariidae
? Eoreticularia sp. n. sp.
? Eoreticularia sp. n. sp.
originally entered as "? Eoreticularia n. sp."
 Spiriferida - Echinospiriferidae
Howittia haideri
 Athyridida - Athyrididae
Leptathyris borki
 Rhynchonellida - Trigonirhynchiidae
Ancillotoechia antiquaria
Rostroconchia
 Conocardiida - Conocardiidae
Conocardium sp.
Conocardium sp. Bronn 1835
Trilobita
 Proetida - Proetidae
Lacunoporaspis sp.
Lacunoporaspis sp. Elkin 1966 trilobite
originally entered as "Lacunaporaspis sp."
 Lichida - Lichidae
? Mephiarges sp.
? Mephiarges sp. Richter and Richter 1930 trilobite
originally entered as "? Mephiarges sp."
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
"solitary rugose corals"