Western North American Naturalist Volume 70 Number 3 Article 1 10-11-2010 Redescription of the Tyee Sucker, Catostomus tsiltcoosensis (Catostomidae) Jes Kettratad Oregon State University, Corvallis,
[email protected] Douglas F. Markle Oregon State University, Corvallis,
[email protected] Follow this and additional works at: https://scholarsarchive.byu.edu/wnan Recommended Citation Kettratad, Jes and Markle, Douglas F. (2010) "Redescription of the Tyee Sucker, Catostomus tsiltcoosensis (Catostomidae)," Western North American Naturalist: Vol. 70 : No. 3 , Article 1. Available at: https://scholarsarchive.byu.edu/wnan/vol70/iss3/1 This Article is brought to you for free and open access by the Western North American Naturalist Publications at BYU ScholarsArchive. It has been accepted for inclusion in Western North American Naturalist by an authorized editor of BYU ScholarsArchive. For more information, please contact
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[email protected]. Western North American Naturalist 70(3), © 2010, pp. 273–287 REDESCRIPTION OF THE TYEE SUCKER, CATOSTOMUS TSILTCOOSENSIS (CATOSTOMIDAE) Jes Kettratad1,2 and Douglas F. Markle1,3 ABSTRACT.—We resurrect Catostomus tsiltcoosensis, the Tyee sucker of Oregon coastal rivers, from the synonymy of Catostomus macrocheilus and compare it with its congeners. Catostomus tsiltcoosensis is superficially similar to dis- junctly distributed Catostomus occidentalis of the Sacramento drainage and Catostomus ardens of the Upper Snake River and Bonneville Basin. However, the gill raker structure, wide frontoparietal fontanelle, location of the ninth cra- nial foramen, scale radii patterns, and cytochrome b sequences clearly align C. tsiltcoosensis with C. macrocheilus rather than C. occidentalis. Differences in counts of infraorbital pores and dorsal fin rays, in body depth proportions, and in cytochrome b sequences distinguish C.