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| A. Omoplax inugusu sp. nov., male; B. O. inugusu sp. nov., female; C. O. kobugashi sp. nov., male; D. O. kobugashi sp. nov., female; E. O. kobugashi sp. nov., fifth instar nymph; F. O. kobugashi sp. nov., fourth instar nymph; G. O. majorcarinae, male; H. O. majorcarinae, female; I. O. hisasuei sp. nov., male. E. Neolitsea sericea var. aurata Hahajima Island, damaged by O. hisasuei sp. nov.; F. M. boninensis from Hahajima Island, damaged by O. inugusu sp. nov.; H. M. kobu from Chichijima Island, damaged by O. kobugashi sp. nov. Souma, 2025 |
Abstract
The lace bugs (Hemiptera, Heteroptera, Tingidae) from the Ogasawara Islands, Japan, which are known as “Oriental Galapagos”, are taxonomically revised. The following eight species belonging to the two endemic genera, Acanthomoplax Souma & Kamitani, 2021 (Tinginae, Tingini) or Omoplax Horváth, 1912 (Tinginae, Tingini) are recognized from the islands: A. tomokunii Souma & Kamitani, 2021, O. desecta (Horváth, 1912), O. hisasuei sp. nov., O. inugusu sp. nov., O. karubei Souma, 2022, O. kobugashi sp. nov., O. majorcarinae Guilbert, 2001, and O. mukojimensis Souma, 2022. In previous studies published in the 2020s, O. inugusu sp. nov. and O. kobugashi sp. nov. were misidentified as O. majorcarinae, while O. majorcarinae, re-diagnosed in the present study, was confused with O. desecta. Host plants for seven of the eight species, excluding O. mukojimensis, were revealed based on field and captive observations. Five of these seven species—A. tomokunii, O. hisasuei sp. nov., O. inugusu sp. nov., O. kobugashi sp. nov., and O. majorcarinae—feed on evergreen lauraceous trees. An illustrated key is also provided to identify all eight lace bug species from the Ogasawara Islands. Moreover, differences in host plants and distribution ranges of the eight endemic species are also discussed. Future research directions necessary for the conservation of endemic lace bugs are proposed.
Key words: Allopatric distribution, East Asia, endemic taxa, host plant, Lauraceae, phytophagous insect, oceanic island, Oceanian Region
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| Living individuals of three tingid species endemic to the Ogasawara Islands, Japan. A. Omoplax inugusu sp. nov., male; B. O. inugusu sp. nov., female; C. O. kobugashi sp. nov., male; D. O. kobugashi sp. nov., female; E. O. kobugashi sp. nov., fifth instar nymph; F. O. kobugashi sp. nov., fourth instar nymph; G. O. majorcarinae, male; H. O. majorcarinae, female; I. O. majorcarinae, fifth instar nymph. |
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| Host plants of seven tingid species endemic to the Ogasawara Islands, Japan. A. Machilus kobu from Ototojima Island, damaged by Acanthomoplax tomokunii; B. M. thunbergii planted in northern Honshu, damaged by A. tomokunii in captivity; C. Rhaphiolepis indica var. tashiroi from Chichijima Island, damaged by Omoplax desecta; D. Calophyllum inophyllum from Chichijima Island, damaged by O. desecta; E. Neolitsea sericea var. aurata Hahajima Island, damaged by O. hisasuei sp. nov.; F. M. boninensis from Hahajima Island, damaged by O. inugusu sp. nov.; G. R. indica var. tashiroi from Mukojima Island, damaged by O. karubei (photographs taken by Jinhyeong Park); H. M. kobu from Chichijima Island, damaged by O. kobugashi sp. nov.; I. N. sericea var. aurata Ototojima Island, damaged by O. majorcarinae. |
Jun Souma. 2025. An Illustrated Key to the Lace Bugs (Hemiptera, Heteroptera, Tingidae) from “Oriental Galapagos” (the Ogasawara Islands, Japan), with Descriptions of Three New Species of the endemic Genus Omoplax Horváth, 1912. ZooKeys. 1250: 243-284. DOI: doi.org/10.3897/zookeys.1250.160064
