Click on the language to view common names.
Common Names in Danish:
Common Names in English:
Northern Bronze-Gudgeon, northern brook lamprey
Common Names in French:
lamproie du nord
Common Names in Mandarin Chinese:
Species Ichthyomyzon fossor
and Snout: Sucking disk in adults
no jaw. Teeth small and blunt
in adults; none in juveniles. No barbels
This nonparasitic species has a sucking disk that is about the same
in diameter as its body. Gill openings consist of seven circular
. Body Pattern
: Solid color. Dark grayish brown or gray on dorsal
surface and flanks, grading
to light gray/brown, silvery, or off-white
unpigmented. No scales
. Body Shape
cylindrical, flexible body. Typically 100-135 mm (4-6.5 inches) with
a maximum of 171 mm.
may reach slightly longer
than adults, with shortening (up to 10%) occuring in transformation
Fins : Rounded tail. Dorsal fin with no spines. No anal , pectoral , pelvic , or adipose fins . The dorsal fin is continuous (not bilobed ).
Distinguishing characteristics: Eel-like body and sucking disk identify the lamprey family . First and second dorsal fin broadly connected. Lateral pores unpigmented. Adult only: maximum disk diameter lesser than maximum body diameter; supraorbital lamina teeth cusps close together, inner circumoral teeth unicuspid . Maximum length 171 mm. 46-56 trunk myomeres. See also similar species information.
Breeding adults: Lampreys spend most of their lives as ammocoetes. They transform to the adult form in the fall , cease feeding, breed in the spring , and die. The adult form is the breeding form. No photo because it s the same.
Juveniles: Ammocoete form. Distinguished from adults based on head and mouth characteristics. Ammocoetes lack eyes, have a hood-like covering of the mouth withour a papillary fringe , and have soft sieve like tissue in the mouth. Ammocoetes are brown to gray-brown without eyes.
Biome: Marine .
- Whittaker & Margulis,1978
- C. Linnaeus, 1758
- (Hatschek, 1888) Cavalier-Smith, 1983
- Grobben, 1908
- (Haeckel, 1874) Cavalier-Smith, 1998
- Bateson, 1885
- Cuvier, 1812
- Family: Petromyzontidae ()
- Order: Petromyzontiformes () -
- Subclass: Petromyzontida ()
- Class: Agnatha ()
- Subphylum: Vertebrata () - Cuvier, 1812 - Vertebrates
- Phylum: Chordata () - Bateson, 1885 - Chordates
- Infrakingdom: Chordonia () - (Haeckel, 1874) Cavalier-Smith, 1998
- Branch: Deuterostomia () - Grobben, 1908
- Subkingdom: Bilateria () - (Hatschek, 1888) Cavalier-Smith, 1983
- Kingdom: Animalia () - C. Linnaeus, 1758 - animals
Ammocoetes borealis Agassiz • Ammocoetes unicolor Dekay
Status: Accepted Name
Last scrutiny: Data last modified by FishBase 06-Jan-1997
Fish Name 1st and 2nd Dorsal Fins Trunk Myomeres Lateral Pores Maximum Disk Diameter Relative to Maximum Body Diameter in Adults Supraoral Lamina Teeth Inner Circumoral Teeth Maximum Total Length (mm) in WI Similarity Index American Brook Lamprey Separated 64-75 Unpigmented Less Widely separated Bicuspid 202 Moderately similar Chestnut Lamprey Connected 51-56 Pigmented Greater Close together Bicuspid 271 Very similar as ammocoetes, moderately similar as adults Northern Brook Lamprey Connected 46-56 Unpigmented Less Close together Unicuspid 171 N/A Sea Lamprey Separated 63-73 Unpigmented Greater Close together Bicuspid 760 Moderately similar Silver Lamprey Connected 46-53 Unpigmented (pigmented in large adults) Greater Close together Unicuspid (rarely 1 bicuspid) 385 Very similar as ammocoetes, moderately similar as adults Southern Brook Lamprey Connected 49-57 Pigmented Less Close together Bicuspid ~170 Very similar
Members of the genus Ichthyomyzon
ZipcodeZoo has pages for 6 species and subspecies in this genus:
I. bdellium (Ohio Lamprey) · I. castaneus (Chestnut Lamprey) · I. fossor (Northern Bronze-Gudgeon) · I. gagei (Southern Brook Lamprey) · I. greeleyi (Mountain Brook Lamprey) · I. unicuspis (Silver Lamprey)
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- A list of common and scientific names of fishes from the United States and Canada. Report presented at the eighty-ninth annual meeting, Clearwater, Fla., Sept. 16-18, 1959. Ann Arbor, Mich., 1960. url p. 6.
- Bulletin of the Southern California Academy of Sciences Los Angeles, Calif.: The Academy, 1971- url p. 102.
- Commercial fisheries review. [Washington]: National Marine Fisheries Service; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.] url p. 15.
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- Dean bibliography of fishes. New York: American Museum of Natural History, 1971-1973. url p. 2, p. 230, p. 232.
- Journal of the Kentucky Academy of Science. Lexington, KY: The Academy, 1998- url p. 126, p. 126, p. 183, p. 183, p. 77.
- Name that animal; a guide to the identification of the common land and fresh-water animals of the United States, with special reference to the area east of the Rockies. With drawings by Olive Driver. Northampton? Mass., 1950 url p. 258.
- Northern fishes: with special reference to the Upper Mississippi Valley / [by] Samuel Eddy and Thaddeus Surber. Minneapolis: University of Minnesota Press,  url p. 69.
- Occasional papers of the Museum of Zoology, University of Michigan. Ann Arbor, Mich.: University of Michigan, 1913- url .
- Report of the United States Commissioner of Fisheries for the fiscal year. .. with appendixes Washington: G.P.O., 1914- url p. 9.
- Some considerations on the distribution of fishes in Ontario. [Toronto]: Printed by the University of Toronto Press, 1944. url p. 114, p. 46, p. 5, p. 57.
- Special scientific report. Seattle, National Marine Fisheries Service; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1949-1971. url , p. 1, p. 11, p. 12, p. 136, p. 177.
- Syllogeus. Ottawa, National Museum of Natural Sciences, 1972-1995. url p. 10, p. 12, p. 6, p. 8.
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- Transactions of the Kentucky Academy of Science. [Lexington, Ky.]Kentucky Academy of Science, 1923-1997. url p. 114, p. 155, p. 53, p. 55, p. 81, p. 82, p. 94.
- Transactions of the San Diego Society of Natural History. 16 1971 [San Diego]: The Society, 1905-1989. url p. 162.
- University of Kansas publications, Museum of Natural History. 20 1971 Lawrence, University of Kansas. url p. 311.
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- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 10, 2012.
- Dyer, Brian S. (from FishBase).
- FishBase. Release date: January 5, 2010
- Global Biodiversity Information Facility. Accessed March 04, 2008. http://www.gbif.org Mediated distribution data from 6 providers.
- Lyons, John. WiscFish.org University of Wisconsin, Center for Limnology, Wisconsin Department of Natural Resources, University of Wisconsin Sea Grant. Provided photos, physical description, and table comparing similar species.
- NatureServe. 2003. Downloadable animal data sets. NatureServe Central Databases. Accessed February 6, 2005.
- Ruggiero M., Gordon D., Bailly N., Kirk P., Nicolson D. (2011). The Catalogue of Life Taxonomic Classification, Edition 2, Part A. In: Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist (Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D., eds). DVD; Species 2000: Reading, UK.
- Species At Risk Act Public Registry, Government of Canada
Accessed through GBIF Data Portal March 04, 2008:
- Canadian Museum of Nature: Canadian Museum of Nature Fish Collection
- FishBase: FishBase DiGIR Provider - Philippine Server
- Institute of Marine and Coastal Sciences, Rutgers University: Canadian Museum of Nature - Fish Collection (OBIS Canada)
- Royal Ontario Museum: Fish specimens
- University of Kansas Biodiversity Research Center: Fish Collection
- University of Minnesota Bell Museum of Natural History: Fish specimens
- Biodiversity Heritage Library NamebankID: 129617
- Catalogue of Life Accepted Name Code: Fis-30142
- Fishbase Species ID: 2516
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 159726
- Zipcode Zoo Species Identifier: 15636
- Scott, W.B. and E.J. Crossman (1973). Freshwater fishes of Canada. Bull. Fish. Res. Board Can. 184:1-966. [back]