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Taxonomic revision of the subfamily Histerinae in the Philippine Archipelago and the genus Atholus in Far Eastern Asia and Oriental region(Coleoptera, Histeridae)
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| Title: | Taxonomic revision of the subfamily Histerinae in the Philippine Archipelago and the genus Atholus in Far Eastern Asia and Oriental region(Coleoptera, Histeridae) |
| Other Titles: | フィリピン産エンマムシ亜科および極東・東洋区産ムナクボエンマムシ属の分類学的再検討 |
| Authors: | dela Cruz, Ian Niel Bulor Browse this author |
| Issue Date: | 25-Mar-2024 |
| Publisher: | Hokkaido University |
| Abstract: | Insects play a crucial role in most ecological processes and may serve as key components in ecosystem structure and its function. Beetles (Coleoptera) have been considered appropriate tools for ecological studies. Among these beetles, those of the family Histeridae (histerid beetles) are known as generalist predators, occupying a wide range of habitats, including heterotrophic systems. They generally prey on the eggs and larvae of most flies and other beetles, and their voracious appetite has helped reduce the number of agricultural pests. They have been employed as successful biological control agents that limit dipteran populations. However, despite their ecological importance, the taxonomy and systematics of Histeridae in the Oriental Region remain poor, despite rich diversity. To date, the current level of understanding of the diversity of many histerid beetles is still deficient, particularly in the Philippine archipelago. This study focuses on reviewing the subfamily Histerinae (Histeridae) from the Philippines and the genus Atholus from both the Oriental Region and Far Eastern Asia. The main goal of this research is to generate a comprehensive taxonomic resource that can be utilized for a better systematic understanding in histerid beetles occurring in the Oriental realm, including extralimital areas such as the Far Eastern Asia. New records of three genera – gen. Notodoma, gen. Mesostrix, and gen. Kanaarister in the Philippines have been determined here for the first time. Seven new species from the Philippines were also originally described: Notodoma sp. 1, Platylister sp. 1, Platylister sp. 2, Platylister sp. 3, Kanaarister sp. 1, Eurylister sp. 1 and Platysoma sp. 1. Additionally, two new species of the genus Atholus – Atholus sp. 1 from Thailand and Atholus sp. 2 from Tibet are also presented here. To date, 56 species of Philippine Histerinae are recorded, and 79 species of Atholus worldwide. Twenty-three species of Histerinae from the Philippines are re-described here. Similarly, eleven species of the Oriental Atholus are re-described in this study for the first time. In addition, seven species of Philippine Histerinae and nine species of Atholus occurring in the Oriental and Far Eastern Asia are provided here with supplemented illustrations of the structures of their male genitalia. SEM micrographs are also presented for better resolution of the external morphology. Some of the taxonomic revisions of Philippine Histerinae presented here include the following: 1) re-assigning Platysoma (Platysoma) dufali into Platysoma subgenus (Cylister) dufali (n. comb.); and 2) re-considering the importance of the number of lateral stria in the pronotum of Platylister subgenus (Platylister) as a good character-state in discriminating species among them. The study of the Oriental and Far Eastern Palearctic Atholus has yielded novel insights and works, including: 1) detailing the structure of its mouthparts and antennae; and 2) distinguishing two types in the gonocoxite structures of the female genitalia, which might become a useful tool for morphological diagnosis among Atholus in the future. All Histerinae listed in the Philippines are also distributed in the Oriental Region, except for the 18 species that are endemic to the archipelago. Nonetheless, several species found in the Philippines also occurs in the Indonesian archipelago and other neighboring islands such as Taiwan and the Ryukyus of Japan. Additionally, cosmopolitan species are more widespread and can occur in Continental Asia and eastward towards Australia and the Pacific, implying that the Philippine archipelago may have become an intermediary spot for the biodiversity of these beetles within the Oriental region. |
| Conffering University: | 北海道大学 |
| Degree Report Number: | 甲第15771号 |
| Degree Level: | 博士 |
| Degree Discipline: | 農学 |
| Examination Committee Members: | (主査) 教授 大原 昌宏, 教授 荒木 仁志, 准教授 吉澤 和徳, 助教 松村 洋子 |
| Degree Affiliation: | 農学院（農学専攻） |
| Type: | theses (doctoral) |
| URI: | http://hdl.handle.net/2115/92639 |
| Appears in Collections: | 学位論文 (Theses) > 博士 （農学）
課程博士 (Doctorate by way of Advanced Course) > 農学院(Graduate School of Agriculture)
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