Kasaan Island (Amoenospirifer-Gypidula? Community): Early/Lower Emsian, Alaska

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa - Favositida - Favositidae
Favosites sp. Lamarck 1816
Trilobita - Phacopida - Cheiruridae
Cheirurus (Crotalocephalus) sp. Beyrich 1845
C. (Crotalocephalus)
Strophomenata - Strophomenida - Amphistrophiidae
Mesodouvillina (Mesodouvillina) sp. Williams 1950
2 specimens
M. (Mesodouvillina)
Rhynchonellata - Spiriferida - Ambocoeliidae
Crurithyris sp. George 1931
2 specimens
Rhynchonellata - Spiriferida - Adolfiidae
Amoenospirifer angustiplicata
295 specimens
Amoenospirifer sulcalplicata
3 specimens
Rhynchonellata - Spiriferida - Delthyrididae
Howellella nucula
rare category
H. nucula alaskensis
Rhynchonellata - Spiriferinida - Cyrtinidae
Cyrtinaella undulata
2 specimens
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Ancillotoechia antiquaria
6 specimens
Rhynchonellata - Rhynchonellida - Aseptorhynchiidae
Aseptirhynchia glabrata
44 specimens
Rhynchonellata - Rhynchonellida - Pugnacidae
Filigreenia circularis
2 specimens
Rhynchonellata - Rhynchonellida - Plectorhynchellidae
? Sibiritoechia sylvia
2 specimens
originally entered as "? Sibiritoechia sylvia"
Rhynchonellata - Pentamerida - Gypidulidae
? Gypidula sp. Hall 1867
132 specimens
originally entered as "? Gypidula sp."
Gypidula orbitatus
rare category
originally entered as "Glypidula orbitatus"
Rhynchonellata - Atrypida - Atrypidae
Spinatrypa sp. Stainbrook 1951
19 specimens
Anatrypa (Desquamatia) aff. alinensis
34 specimens
A. (Desquamatia) - originally entered as "Anatrypa aff. alinensis"
Rostroconchia - Conocardiida - Conocardiidae
Conocardium sp. Bronn 1835
Crinoidea
Crinoidea indet. Miller 1821
see common names

Geography
Country:United States State/province:Alaska
Coordinates: 55.5° North, 132.3° West (view map)
Paleocoordinates:18.4° South, 83.8° West
Geographic resolution:outcrop
Time
Period:Devonian Epoch:Early/Lower Devonian
Stage:Emsian 10 m.y. bin:Devonian 2
*Period:Early/Lower Devonian
*International age/stage:Middle Emsian *Local age/stage:Zlichovian
Key time interval:Early/Lower Emsian Conodont zone: gronbergi
Age range of interval:409.10000 - 402.50000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Stratigraphic resolution:formation
Stratigraphy comments: section is 244.6 m
Lithology and environment
Primary lithology: "carbonate"
Environment:reef, buildup or bioherm
Geology comments: "coquina-like deposits... micrite, coarse stromatoporoid debris, and fragmented, disarticulated brachiopods... shoal-water zone... [far] from the ancient shoreline... muddy, bioclastic substratum of a 'reef'-related, shallow shelf environment... biostromal or 'reefoid' banks of relatively low relief"
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection methods:field collection
Reason for describing collection:paleoecologic analysis
Taxonomic list comments:composite of five collections; abundance data only given for brachiopods; total number of specimens 543
Metadata
Also known as:Reef 3272
Database number:3477
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:J. Alroy Research group:marine invertebrate
Created:1999-08-02 15:45:09 Last modified:2012-08-20 01:16:49
Access level:the public Released:1999-08-02 15:45:09
Creative Commons license:CC BY
Reference information

Primary reference:

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