Korean Journal of Ichthyology (한국어류학회지)

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

한국산 송사리속 Oryzias 어류 2종의 인두골과 인두치 구조

  • 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)
  • 김현태 (전북대학교 자연과학대학 생명과학과, 전북대학교 생물다양성연구소) ;
  • 박종영 (전북대학교 자연과학대학 생명과학과, 전북대학교 생물다양성연구소)
  • Received : 2013.02.19
  • Accepted : 2013.03.17
  • Published : 2013.03.31
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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.

한국산 송사리속 2종에 대한 인두골과 인두치의 구조적 차이를 조사하였다. 그 결과 송사리 O. latipes와 대륙송사리 O. sinensis의 인두골은 모두 1쌍의 물방울 모양(stilliform)의 상인두골과 사각형 모양 (rectangular form)의 하인두골로 구성되었다. 특히 송사리와 대륙송사리의 인두치 열수에 있어서 상인두골은 각각 11~12열, 11~12열을 나타냈고 하인두골이 각각 6~7열, 5~6열을 나타냈다. 또한 인두치에서 송사리는 이빨의 끝이 옆으로 휘어지는 후크모양(top-hooked type)인 반면에, 대륙송사리는 이빨의 끝이 원뿔모양(conical type)을 나타났다. 이상과 같이 한국에 분포하는 2종의 송사리는 인두치에서 형태적 차이를 보여 주었다.

Keywords

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