gonidia

…The fungi that make up the majority of lichens are Ascocysts, Basidiomycetes, and Imperfect Fungi, and those that live in symbiosis with algae are called Ascocysts, Basidiomycetes, and Imperfect lichens, respectively. The symbiotic algae, also called gonidia, belong to the green algae and cyanobacteria, and are commonly found in the genera Trebouxia , Nostoc , and Trentepohlia . The external morphology of lichens varies, but they can be broadly divided into three types: crustose lichens (e.g., Psammophila), in which the lichen body is undifferentiated and adheres closely to the substrate; foliose lichens (e.g., Parmelioides nigra, Psammophila serrata), which have leaf-like, dorsoventral lichen bodies with rhizoids or umbilicates on the underside; and arborescent lichens (e.g., Usnea nigra, Psammophila serrata), which attach to the substrate at the base of the lichen body and hang down or upright (e.g., Usnea nigra, Psammophila serrata). …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…地衣体の大部分を構成する菌類は，子囊菌類，担子菌類，不完全菌類で，それぞれ藻類と共生したものを子囊地衣類，担子地衣類，不完全地衣類と呼ぶ。共生藻はゴニジアgonidiaとも呼ばれ，緑藻類やラン藻類に属し，トレブクシア属Trebouxia，ネンジュモ属Nostoc，スミレモ属Trentepohliaが多い。　地衣体の外部形態はさまざまであるが，地衣体が未分化で基物に密着する固着地衣類(例，チズゴケ)，地衣体が葉状で背腹性があり，裏面に仮根(偽根)や臍状体（さいじようたい）をもつ葉状地衣類(例，ウメノキゴケ，イワタケ)，地衣体の基部で基物に付着し，立ち上がったり垂れ下がったりする樹枝状地衣類(例，サルオガセ，ハナゴケ)の三つに大別できる。…

※「gonidia」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