Abstract
The primarily marine subtidal family Laophontidae not only contains more valid genera than any other family in the Harpacticoida, it is also one of the most speciose ones in the order, currently accommodating 327 species and subspecies. Based on published records, 25 laophontid species in 12 genera have so far been reported from Korean waters. Here both sexes of a new genus and species of Laophontidae are described, collected from shell gravel off Dokdo Island in the East Sea. Philippiphonte aspidosoma gen. et sp. n. displays a radically divergent morphology, including an extreme dorsoventrally depressed body shape which is reminiscent of members of the family Porcellidiidae. The convergent evolution of dorsoventrally flattened body plans in the Harpacticoida is briefly discussed.The distribution and habitat preference of laophontid species recorded from the Korean peninsula are summarised. The authenticity of the Korean record of Folioquinpes mangalis Fiers & Rutledge, 1990 from washings of invertebrates and intertidal stones from Jeju Island is reassessed in the light of a discussion of the genus. Folioquinpes pseudomangalis sp. n. and F. indicus sp. n. are proposed as new species for Folioquinpes mangalis Fiers & Rutledge, 1990 sensu Kim (2013) and Laophonte chathamensis Sars, 1905 sensu Sewell (1924), respectively. A key to species of Folioquinpes Fiers & Rutledge, 1990 is provided.
Highlights
The Laophontidae is one of the most speciose families in the Harpacticoida, currently accommodating 327 species and subspecies and containing more valid genera (74!) than any other family in the order
Laophontids have radiated into a wide range of other habitats, including saltmarshes and intertidal mudflats (Barnett 1968; Bodin 1976), the fronds and holdfasts of macroalgae (Hicks 1977a–b), the interstitial environment of sandy beaches (Cottarelli et al 1986, 2008; Fiers 1990, 1991), brackish lagoons (Hamond 1972; Heip 1969; Lee and Chang 2008), anchihaline and coastal marine caves (Chappuis 1938; Huys and Lee 2000) and the deep sea (Huys and Lee 2000; Lee and Huys 1999)
Jejulaophonte hyeopjaeensis Back & Lee, 2014 was recently described from a sandy beach on Jeju Island (Back and Lee 2014). Both sexes of a new species were collected from shell gravel off Dokdo Island in the East Sea
Summary
The Laophontidae is one of the most speciose families in the Harpacticoida, currently accommodating 327 species and subspecies and containing more valid genera (74!) than any other family in the order. Quinquelaophonte koreana Lee, 2003 was described from a sandy beach in Taean on the west coast of the Korean peninsula (Lee 2003) while Song et al (2010) reported Laophonte cornuta Philippi, 1840, Paralaophonte lacerdai Jakobi, 1953, P. obscura Vervoort, 1962, Heterolaophonte discophora Willey, 1929 and H. hamata Jakobi, 1954 from phytal communities on Ulva pertusa Kjellman in Pohang, eastern Korea. Jejulaophonte hyeopjaeensis Back & Lee, 2014 was recently described from a sandy beach on Jeju Island (Back and Lee 2014) Both sexes of a new species were collected from shell gravel off Dokdo Island in the East Sea. The new species displays a radically divergent morphology and cannot be accommodated in any of the currently recognised genera. The authenticity of the Korean record of Folioquinpes mangalis from washings of invertebrates and intertidal stones from Jeju Island is reassessed in the light of a review of the genus Folioquinpes Fiers & Rutledge, 1990
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