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ASED, vol. 41, no. 1, pp.83-88, January, 2025 DOI. http://doi.org/10.5635/ASED.2025.41.1.025

A New Record of Simognathus Halacarid Mite (Acari, Halacaridae) from Korea

Jong Hak Shin1,2, Cheon Young Chang2, Jimin Lee1,*
1Ocean Climate Response · Ecosystem Research Department, Korea Institute of Ocean Science and Technology, Busan 49111, Korea 2Department of Biomedical Science, Daegu University, Gyeongsan 38453, Korea

  • ABSTRACT

    A marine halacarid mite, Simognathus fuscus Viets, 1936, was discovered in the intertidal and subtidal sandy sediments of the southern coast of Jeju Island, Korea. Simognathus fuscus, which is distributed in the Caribbean, southwestern Atlantic, and southwestern Pacific, is characterized by a round ocular plate, secondary dorsal setae located on the membranous cuticle anterior to the ocular plate, an anterior epimeral plate almost entirely covered with foveae, the anterior area of the genitoanal plate without foveae, a pair of adanal setae on the sides of the anal cone, positioned ventrodistally, and one ventral and one parambulacral seta on tarsi III and IV, respectively. The Korean specimens corresponded well with the original description of S. fuscus from Bonaire in the Caribbean, as well as records from other regions, although they showed one minor morphological difference in that the Korean specimens have slightly larger body sizes. This is the first report of S. fuscus from Korea.

  • Keyword

    Halacaroidea, marine, meiofauna, Simognathus fuscus, taxonomy