Abstract
Wormaldia collections from the Ryûkyû Archipelago were examined and 10 species including 6 new species were recognized: W. carinata (Schmid), W. okinawaensis sp. nov., W. apophysis sp. nov., W. tectum sp. nov., W. itoae sp. nov., W. amamiensis sp. nov., W. ishigakiensis sp. nov., W. niiensis Kobayashi, W. yakuensis Kobayashi and W. sp. Males of all six new species, as well as a male of W. carinata and females of W. carinata, W. apophysis, W. okinawaensis and W. ishigakiensis are described or redescribed and illustrated. Species compositions of Wormaldia were totally different among three regions, northern, central and southern Ryûkyûs.
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