Systematic Studies of the Orangethroat Darter, Etheostoma Spectabile, Complex (Percidae: Subgenus Oligocephalus)
Ceas, Patrick Alfred
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https://hdl.handle.net/2142/85390
Description
Title
Systematic Studies of the Orangethroat Darter, Etheostoma Spectabile, Complex (Percidae: Subgenus Oligocephalus)
Author(s)
Ceas, Patrick Alfred
Issue Date
1997
Doctoral Committee Chair(s)
Page, Lawrence M.
Department of Study
Biology
Discipline
Biology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biology, Zoology
Language
eng
Abstract
A morphological and allozymic examination of variation within populations previously recognized as the orangethroat darter, Etheostoma spectabile, with an emphasis on populations occurring south of the Ohio River in Kentucky and Tennessee and a reexamination of populations occurring in the Ozarks, has revealed the existence of nine previously unknown taxa and confirmed specific status for two previously recognized subspecies. Each of the newly recognized species has unique color patterns on the breeding males and diagnostic modes for various meristic counts. These eleven species, along with populations putatively recognized as E. s. pulchellum, E. s. spectabile, and E. s. squamosum comprise a monophyletic group that is recognized as the E. spectabile complex. Included are a diagnosis and general description of the E. spectabile complex; a key to the breeding males of the E. spectabile complex; a key to the females and nonbreeding males; diagnoses, descriptions, discussions of intraspecific variation, comparisons among taxa, and distributional data for each recognized taxon within the E. spectabile complex; and comparisons of meristic and allozyme data among the species.
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