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Taxonomic studies on Hydrophilidae and other coleoptera residing in temporally limited heterotrophic systems
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| Title: | Taxonomic studies on Hydrophilidae and other coleoptera residing in temporally limited heterotrophic systems |
| Other Titles: | 腐敗・分解有機物環境に生息する甲虫類の分類学的研究 |
| Authors: | SUZUMURA, ALYSSA LEE Browse this author |
| Issue Date: | 26-Sep-2022 |
| Publisher: | Hokkaido University |
| Abstract: | Heterotrophic habitats, including decaying vegetation, dung, and carrion, act as
nutritionally rich but temporally limited habitats in which various organisms function in the
process of decomposition. The breakdown of detritus is necessary for mass removal and
nutrient cycling and different species of insects, fungi, etc. play special roles in this process.
Terrestrial hydrophilid beetles tend to specialize in such habitats and play roles in breaking up
and consuming detritus and predating on fly larvae and other soft bodied invertebrates. Since
a single microhabitat can contain many species of these rather small beetles, their identification
can be difficult and many groups require taxonomic revision.
This thesis consists of taxonomic studies on several groups of hydrophilid beetles
(Coleoptera: family Hydrophilidae) living in decaying organic material with an additional
section on other beetles living in decaying material on beaches. The members of the genus
Sphaeridium occurring in Europe and Asia are revised with descriptions of two previously
undescribed species, Sphaeridium sp.1 and S. sp.2, one new synonymy of S. reticulatum into
S. severini, sixteen new country and ten new regional records (S. bipustulatum from China,
India, and Pakistan; S. dimidiatum from Cambodia and Laos and Halmahera, Sulawesi,
Sumbawa, Ternate, and West Timur in Indonesia; S. discolor from Malaysia and Nepal and
Kyushu, Japan and Queensland, Australia; S. marginatum from China; S. quinquemaculatum
from Bhutan, Guam, and Laos; S. seriatum from Japan; S. severini from Thailand and Quangxi,
China and Flores and Sulawesi, Indonesia, S. substriatum from North Korea; S. vitalisi from
China, India, Indonesia, Nepal, and Taiwan). Members of the beach dwelling species of
Cercyon from the Pacific region are also comprehensively revised with an analysis of the
characters of the female genitalia and metafurca for diagnostic purposes. Keys, illustrations,
habitus photos, and SEM are included for both Sphaeridium and Cercyon revisions.
Hydrophilids collected from a fallen nest of the giant Asian honeybee Apis dorsata dorsata
from Bogor Botanical Garden, Java, Indonesia, are also identified and analyzed taxonomically
with habitus photos of all species and SEM images and genitalia illustrations for species
lacking recent taxonomic treatment. One new country record for Protosternum hainanensis
and two new regional records for Noteropagus obliquus and N. occlusus are included.
Additionally, a new record of the Byrrhid genus Microchaetes (Coleoptera: Byrrhidae) from
Japan with habitus photographs and genitalia illustrations and a revision of the Pacific
tenebrionid genus Phaleromela (Coleoptera: Tenebrionidae) are included. The three confirmed
species of Phaleromela are redescribed with habitus photos, SEM images, and genitalia
illustrations along with a key to species. |
| Conffering University: | 北海道大学 |
| Degree Report Number: | 甲第15151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 首藤 光太郎 |
| Degree Affiliation: | 農学院（農学専攻） |
| Type: | theses (doctoral) |
| URI: | http://hdl.handle.net/2115/90538 |
| Appears in Collections: | 課程博士 (Doctorate by way of Advanced Course) > 農学院(Graduate School of Agriculture)
学位論文 (Theses) > 博士 （農学）
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