The genus Anacaena Thomson from the Ryukyu Archipelago of Japan (Coleoptera, Hydrophilidae)

IF 1.3 3区农林科学 Q2 ENTOMOLOGY

Deutsche Entomologische Zeitschrift Pub Date : 2023-03-24 DOI:10.3897/dez.70.96994

Y. Minoshima, Y. Kamite, M. Fikáček

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引用次数: 0

Abstract

We review the genus Anacaena Thomson, 1859 from the Ryukyu Archipelago, southern Japan. Three aquatic species are recognised: A. torikaiisp. nov. from Amami-ôshima Island, A. okinawanasp. nov. from Okinawa-jima Island and Kerama Islands, and A. kumejimanasp. nov. from Kumejima Island. All three species are very similar, with the morphology of the aedeagus being essential for a reliable identification. Dorsal colouration is also useful as a diagnostic character, despite some variation within species. We observe a possible geography-based variation between A. okinawana from Okinawa-jima I. and the neighbouring Kerama Is., but we treat both populations as conspecific based on genital morphology. Anacaena kumejimana and A. okinawana share many morphological characters possibly indicating their close relationship. We compare the endemism of aquatic Hydrophilidae in the Ryukyu Archipelago to that in other groups of aquatic beetles: the proportion of endemic species is higher in aquatic Hydrophilidae than in Dytiscidae, but much lower than in stream-inhabiting Hydraenidae and Elmidae. A list of Japanese species of Anacaena and a key to the Japanese species of the genus are provided.

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日本琉球列岛水豚属（鞘翅目，水豚科）

我们回顾了日本南部琉球群岛的Anacaena Thomson属，1859年。有三种水生物种已被确认：A.torikauisp。11月，冲绳县阿马米岛。11月，来自冲绳岛和角间群岛，以及A.kumejimanasp。11月从久美岛出发。这三个物种都非常相似，aedeagus的形态对可靠的鉴定至关重要。尽管物种内部存在一些变异，但背部颜色也可作为诊断特征。我们观察到冲绳岛的冲绳岛和邻近的喀拉拉邦之间可能存在基于地理的变异，但我们根据生殖器形态将这两个种群视为同种。金合欢和冲绳金合欢有许多共同的形态特征，这可能表明它们的亲缘关系密切。我们比较了琉球群岛水生甲虫科和其他水生甲虫群的特有种：水生甲虫科的特有种比例高于水螅科，但远低于溪流中的水螅和Elmide。提供了日本银合欢属物种的列表和该属日本物种的关键。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Deutsche Entomologische Zeitschrift 生物-昆虫学

CiteScore

1.60

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Founded in 1857 as Berliner Entomologische Zeitschrift, Deutsche Entomologische Zeitschrift is one of the World''s oldest international journals of systematic entomology. It publishes original research papers in English on the systematics, taxonomy, phylogeny, comparative morphology, and biogeography of insects. Other arthropods are also considered where of relevance to the biology of insects. The geographical scope of the journal is worldwide. Deutsche Entomologische Zeitschrift (DEZ) is dedicated to provide an open access, high-quality forum to contribute to the documentation of insect species, their distribution, their properties, and their phylogenetic relationships. All submitted manuscripts are subject to peer-review by the leading specialists for the respective topic. The journal is published in open access high-resolution PDF, semantically enriched HTML and machine-readable XML versions.