Dolores River Canyon fish locality B (Triassic to of the United States)

Where: Montrose County, Colorado (38.3° N, 108.9° W: paleocoordinates 14.5° N, 47.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Chinle Formation, Norian to Norian (228.0 - 201.3 Ma)

• Upper part of Chinle Formation

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; nodular, green siltstone and red mudstone

• Fish found predominantly in a 5 cm thick layer of greenish, nodular siltstone, but also in underlying and overlying layers of reddish mudstone

Size classes: macrofossils, mesofossils

Collected in the 1950s, 1960s; reposited in the AMNH, USNM

Collection methods: quarrying,

Primary reference: B. Schaeffer. 1967. Late Triassic fishes from the western United States. Bulletin of the American Museum of Natural History 135(6):285-342 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 135712: authorized by Richard Butler, entered by Richard Butler on 05.11.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Palaeonisciformes - Redfieldiidae
Cionichthys dunklei Schaeffer 1967
AMNH 5624, 5625, 5630, 5631, 5632
Synorichthys stewarti n. gen. n. sp. Schaeffer 1967
AMNH 5646 (holotype), 5663, 5664, 5668, 5671, 5672, 5676, 5678, USNM 23416
 Semionotiformes - Semionotidae
Semionotus sp. Agassiz 1843
AMNH 5681, 5684, 5691, 5706
Coelacanthimorpha
 Coelacanthiformes - Coelacanthidae
Chinlea sorenseni Schaeffer 1967 coelacanth
AMNH 5654, 5655, 5658, 5659