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

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

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; carbonate

• "muddy sediments... quiet waters of a lagoon or shelf (B.A. 3) not directly adjacent to the stromatoporoid colonies... abundant fine-grained micrite"

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 3480: authorized by John Alroy, entered by John Alroy on 02.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• composite of three collections; abundance data only given for brachiopods; total number of specimens 353
Show authors, comments, and common names
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
"solitary rugose corals"
Trilobita
 Proetida - Proetidae
? Schizoproetoides sp.
? Schizoproetoides sp. Ormiston 1967 trilobite
originally entered as "? Schizoproetoides sp."
Strophomenata
 Strophomenida - Douvillinidae
? Cymostrophia sp.
? Cymostrophia sp. Caster 1939
originally entered as "? Cymostrophia sp."
 Strophomenida - Amphistrophiidae
Mesodouvillina (Mesodouvillina) sp.
Mesodouvillina (Mesodouvillina) sp. Williams 1950
M. (Mesodouvillina)
 Strophomenida - Leptostrophiidae
Brachyprion (Brachyprion) sp.
Brachyprion (Brachyprion) sp. Shaler 1865
B. (Brachyprion)?
 Orthotetida - Areostrophiidae
? Eoschuchertella sp.
? Eoschuchertella sp.
originally entered as "? Eoschuchertella sp."
Rhynchonellata
 Atrypida - Atrypidae
Spinatrypa sp., Anatrypa (Desquamatia) sp., Anatrypa (Desquamatia) aff. alinensis
Spinatrypa sp. Stainbrook 1951
Anatrypa (Desquamatia) sp.
A. (Desquamatia)
Anatrypa (Desquamatia) aff. alinensis
A. (Desquamatia) - originally entered as "Anatrypa aff. alinensis"
 Orthida - Schizophoriidae
Schizophoria sp.
Schizophoria sp. King 1850
sp. A
 Pentamerida - Gypidulidae
? Gypidula sp.
? Gypidula sp. Hall 1867
originally entered as "? Gypidula sp."
 Rhynchonellida - Trigonirhynchiidae
Ancillotoechia antiquaria, ? Trigonirhynchia aff. ventricosa
? Trigonirhynchia aff. ventricosa
originally entered as "? Trigonirhynchia aff. ventricosa"
 Rhynchonellida - Plectorhynchellidae
? Sibiritoechia sylvia
? Sibiritoechia sylvia
originally entered as "? Sibirotoechia sylvia"
 Athyridida - Athyrididae
Leptathyris borki, Protathyris pacificana
 Spiriferida - Echinospiriferidae
Howittia haideri
 Spiriferida - Adolfiidae
Amoenospirifer angustiplicata
 Spiriferida - Ambocoeliidae
Crurithyris sp.
Crurithyris sp. George 1931
 Spiriferida - Delthyrididae
Howellella nucula
Howellella nucula
H. nucula alaskensis
 Terebratulida - Meganterididae
Micidus stellae
Rostroconchia
 Conocardiida - Conocardiidae
Conocardium sp.
Conocardium sp. Bronn 1835