File:Archaea.png · Wikimedia Commons · See Wikimedia Commons
古細菌
Also known as Archaebacteria, Archaeobacteria, Archaeans, Archaeon
真核生物・細菌とともに、生命の三つのドメインを構成する一群の原核生物
AI overview
Archaea is a domain of single-celled organisms that were originally thought to be prokaryotes distinct from bacteria, though scientists have discovered that eukaryotes (including all animals, plants, and fungi) actually evolved from archaea. Today, the term "archaea" typically refers to the prokaryotic members of this group, even though technically eukaryotes are also part of the archaea domain from an evolutionary standpoint.
AI-generated from the Wikipedia summary — may contain errors.
Species
古細菌ドメイン
Kingdom
Habitatmarine, brackish, freshwater
The existence of archaea in the oceans has been known for a long time. However, they were only discovered in the North Sea in the beginning of the 21st century. Archaea resemble normal bacteria, but are very different internally. They can live under extreme conditions: there are archaea known to live in boiling water! Archaea play an important role in the nitrogen cycle in the North Sea. These organisms are capable of changing ammonia into nitrite. One liter of seawater by Texel contains 5 to 45 million archaea. They are found particularly in the winter, when there is too little light for algae to grow.
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Research
40,662 papers- Archaea oxidizing alkanes through alkyl-coenzyme M reductases.ReviewCurrent opinion in microbiology · 2024Musat F, Kjeldsen KU, Rotaru AE et al.DOI: 10.1016/j.mib.2024.102486
- DPANN archaea.ReviewCurrent biology : CB · 2025Huang WC, Spang ADOI: 10.1016/j.cub.2025.06.038
Article · 日本語
古細菌（こさいきん、ラテン語、英語:archaea/アルカエア、単数形:archaeum, archaeon、英語発音: [ɑrˈkiːə]、アーキア）は、生物の主要な系統の一つである。細菌（バクテリア）、真核生物（ユーカリオタ）と共に、全生物界を3分している。古細菌は形態や名称こそ細菌と類似するが、細菌とは異なる系統である。高度好塩菌、メタン菌、好熱菌などが良く知られている。 日本語では「古細菌」または「アーキア」が呼称されることが多い。「始原菌」（しげんきん）も使われる。「古細菌」という名称は、「菌」および「細菌」を名前に含むが、菌類（真菌）や細菌（真正細菌）とは異なる。
Abstract from DBpedia / Wikipedia · CC BY-SA