Discovery of a troglomorphic trechine beetle from the Ryukyu Archipelago, Southwestern Japan (Coleoptera: Carabidae: Trechinae)

Sugaya Kazuki, Kakizoe Showtaro, Ooka Sohei, Tamura Hisao, Sone Shinzaburo
Acta Entomologica Musei Nationalis Pragae 63(2): 323-340, 2023
Published online: 11th December 2023
Views: 6574
Abstract: A new genus and new species of Trechina (Coleoptera: Carabidae: Trechinae: Trechini), Ryukyuaphaenops pulcherrimus gen. & sp. nov. is described from the Ryukyu Archipelago, Japan. This is the first troglomorphic Carabidae in the Ryukyus and probably the most cave-adapted beetle in Japan. Interestingly, our observations suggest that this new trechine beetle is not similar to any genera of Trechina distributed in Kyushu and Taiwan, which are geographically close to the Ryukyu Archipelago, but is more similar to several aphaenopsian genera distributed in the inland of China. The genetic diversity of the new species is discussed based on mitochondrial DNA (COI-5’, COI-3’, 16S).
Key words: Coleoptera, Carabidae, Trechini, Trechina, biospeleology, DNA barcoding, haplotype network, new genus, new species, subterranean fauna, taxonomy, troglobiont, Okinawa-jima Island, Ryukyus, Oriental Region
Papers
Out of the Palaearctic: the Helophorus water beetles of the Afrotropical Region (Coleoptera: Helophoridae)A new species of the genus Stigmatonotum (Hemiptera: Heteroptera: Rhyparochromidae) from Japan, with notes on related species from the East Palaearctic and Oriental RegionsContribution to the knowledge of Batrachideini (Orthoptera: Tetrigidae): description of two new flightless genera, Naskreckiana and Procellator, and revision of the status of EotetrixScaphobaeocera setosa sp. nov., an unusual Scaphidiinae (Coleoptera: Staphylinidae) with elongate tarsal setae from ChinaERRATUM: ZHANG W.-X. & YIN Z.-W. 2023: Feabatrus gen. nov., a conspicuous new genus of Batrisitae from Myanmar and China (Coleoptera: Staphylinidae: Pselaphinae). Acta Entomologica Musei Nationalis Pragae 63 (1): 165–175. https://doi.org/10.37520/aemnp.20Two new sympatric species of Songius from Mount Fanjing, Southwest China (Coleoptera: Staphylinidae: Pselaphinae)Larval morphology of Crephelochares and Peltochares (Coleoptera: Hydrophilidae)Discovery of a troglomorphic trechine beetle from the Ryukyu Archipelago, Southwestern Japan (Coleoptera: Carabidae: Trechinae)Description of one new genus and two new species of Apomecynini (Cerambycidae: Lamiinae) from MexicoFirst record of the tribe Oecleini in Australia (Hemiptera: Auchenorrhyncha: Fulgoromorpha: Cixiidae) with the description of a new genus and speciesA review of Lasioglossum (Leuchalictus) in Taiwan (Hymenoptera: Apoidea: Halictidae)Chalarus (Diptera: Pipunculidae) of Colombia, with description of two new species and an updated key to males of the Neotropical speciesRehabilitation of Mormoschema (Hemiptera: Heteroptera: Pentatomidae): generic status restituted and tribal placement revisedIntegrative taxonomy of Central European Planetella (Diptera: Cecidomyiidae) indicates high species diversity, intraspecific variation and low host specificityDiversity and morphology of Eocene and Oligocene Mordellidae (Coleoptera)Abstracts of the Immature Beetles Meeting 2023 October 5–6, Prague, Czech Republic