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Title:Taxonomy of the Neotropical Thorny Catfishes (Siluriformes: Doradidae) and Revision of Genus Leptodoras
Author(s):Sabaj, Mark Henry
Doctoral Committee Chair(s):Page, Lawrence M.
Department / Program:Animal Biology
Discipline:Animal Biology
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Biology, Genetics
Abstract:Cladistic analysis of relationships among Leptodoras and related taxa (Anduzedoras, Doras, Hassar, Hemidoras) using morphological data recovers Leptodoras praelongus (Myers & Weitzman) as the most ancestral species. The most derived clade is composed of two nominal species, Leptodoras juruensis Boulenger and Leptodoras myersi Bohlke, and one undescribed species, Leptodoras sp. 3. A sister-group relationship between Leptodoras and the monotypic Anduzedoras oxyrhynchus (Valenciennes) is supported by four unambiguous synapomorphies: predorsal distance ≤41% of standard length, first vertebra conspicuously expanded, maxillary edentulous, and average sum of midlateral scutes ≥70. This relationship and those among species of Leptodoras suggest a gradual evolution from a midwater or hyperbenthic form to a truly benthic, relatively deepwater form.
Issue Date:2002
Type:Text
Language:English
Description:422 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2002.
URI:http://hdl.handle.net/2142/87841
Other Identifier(s):(MiAaPQ)AAI3070424
Date Available in IDEALS:2015-09-28
Date Deposited:2002


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