Hydrophilidae

…They were once commonly seen in various places, but their numbers have decreased significantly due to development and the effects of pesticides. There are about 2,000 species of Hydrophilidae (water-scavenger beetles) known from around the world, and nearly 80 species from Japan, and they can be broadly divided into aquatic and terrestrial. [Hayashiro Nagayasu]. …

*Some of the terminology that mentions "Hydrophilidae" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…かつては各地にふつうに見られたが，開発や農薬などの影響でその数が著しく減じた。ガムシ科Hydrophilidae(英名water‐scavenger beetle)は世界から約2000種，日本から80種近くが知られ，水生と陸生に大別できる。【林 長閑】。…

※「Hydrophilidae」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報