Amyzon aggregatum WILSON, 1977

Taxonomy

Sucker Fish

Kingdom: Animalia
Phylum: Chordata
Class: Actinopteri Cope 1871
Order: Cypriniformes Goodrich, 1909
Family: Catostomidae Agassiz, 1855
Genus: Amyzon
Species: Amyzon aggregatum
Author Citation WILSON, 1977

Geological Time Scale

Eon: Phanerozoic
Era: Cenozoic
Period: Paleogene
Sub Period: None
Epoch: Eocene
International Age: Early

Stratigraphy

Klondike Mountain Formation

Provenance

Acquired by: Purchase/Trade

Dimensions

Length: 8 cm

Location

Stonerose Interpretive Center
Republic, Ferry County
Washington
United States

• amyzon
• eocene
• republic
• stone rose
• tff-oilshale-ch731

Comments

Taxonomy from Liu 2021.

Diagnosis from Wilson 1977, p. 32: "Eocene Amyzon with body depth to standard length ratio 0.26 to 0.51; head length to standard length ratio 0.24 to 0.34; dorsal fin base length to standard length ratio 0.28 to 0.43; vertebrae 16-19 + 14-18; D 21-27; A 7-11; P 12-20; V 7-15; C i,8- (9),(7)-8-(9),i; scales maximum width to total length ratio 0.39 to 1.49, focus — basal margin to total length ratio 0.26 to 0.49, apical primary radii 2-14, apical secondary radii 0-22, basal primary radii 0-30, basal secondary radii 0-27, laterobasal corners mostly strong."

Identified by oilshale.

References:
Grande, L., Eastman, J. & Cavender, T. (1982): Amyzon gosiutensis, a New Catostomid Fish from the Green River Formation. Copeia, 1982(3), 523-532.
WILSON, M. V. H. (1977): Middle Eocene freshwater fishes from British Columbia. Life Sci. Contrib. Roy. Ontario Mus. 113, 1-61.
Wilson, M. V. H. (1996) The Eocene fishes of Republic, Washington. Washington Geology, 24, 30–31.
Liu, J. (2021) Redescription of ‘Amyzon’ brevipinne and remarks on North American Eocene catostomids (Cypriniformes: Catostomidae).