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The Structures of the Pharyngeal Bones and Teeth in Two Korean Ricefishes (Pisces, Adrianichthyidae), Oryzias latipes and O. sinensis  

Kim, Hyun-Tae (Department of Biological Science and Institute for Biodiversity, College of Natural Sciences, Chonbuk National University)
Park, Jong-Young (Department of Biological Science and Institute for Biodiversity, College of Natural Sciences, Chonbuk National University)
Publication Information
Korean Journal of Ichthyology / v.25, no.1, 2013 , pp. 33-37 More about this Journal
Abstract
A study on the structures of the pharyngeal bones and teeth in two Korean ricefishes, Oryzias latipes and O. sinensis, was carried out to find out interspecfic differences. In the pharyngeal bones, both two species have a pair of upper pharyngeal bone (stilliform shape) and lower pharyngeal bone (rectangular shape). In the lower pharyngeal bones, in particular, the number of the row was 6 to 7 in O. latipes and 5 to 6 in O. sinensis. The pharyngeal teeth also showed different types in two species: O. latipes of a top-hooked type and O. sinensis of a conical type. Through this study, we confirmed that the two Korean ricefishes show distinctive characteristics in the structure of the pharyngeal teeth.
Keywords
Pharyngeal bones; pharyngeal teeth; Oryzias latipes; O. sinensis; Korea;
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