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

Show authors, comments, and common names
Actinopteri
 Semionotiformes - Semionotidae
Semionotus sp.
Semionotus sp. Agassiz 1832
AMNH 5681, 5684, 5691, 5706
Osteichthyes
 Palaeonisciformes - Redfieldiidae
"Synorichthys stewarti n. gen. n. sp." = Lasalichthys stewarti, Cionichthys dunklei
"Synorichthys stewarti n. gen. n. sp." = Lasalichthys stewarti Gibson 2018
AMNH 5646 (holotype), 5663, 5664, 5668, 5671, 5672, 5676, 5678, USNM 23416
Cionichthys dunklei Schaeffer 1967
AMNH 5624, 5625, 5630, 5631, 5632
Coelacanthimorpha
 Coelacanthiformes - Mawsoniidae
Chinlea sorenseni
Chinlea sorenseni Schaeffer 1967 coelacanth
AMNH 5654, 5655, 5658, 5659