cephalodia

...Cyphellae and pseudocyphellae are tiny holes or cracks that appear on the surface of the lichen, and are either circular or linear. They are thought to play a role in gas exchange. Cephalodia are pouch-like organs that contain cyanobacteria and occur in lichens that have a symbiotic relationship with green algae. They occur in species such as Cephalodia, Cephalosporum, and Cephalosporum. Those that form on the surface of the lichen are called external capitates, and those that form inside the lichen are called internal capitates, and their shapes are determined by the type of lichen.

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…盃点cyphellaと偽盃点pseudocyphellaは地衣体表面に生じた微小な穴や亀裂で，円形，線形となり，ガス交換に役立つと考えられる。頭状体cephalodiaは緑藻を共生藻とする地衣類に生じるラン藻の入った袋状の器官で，カブトゴケ，ツメゴケ，モゴケ属等に生じる。地衣体表面にできるものを外部頭状体，地衣体内部にできるものを内部頭状体と呼び，その形状は地衣類の種類によって決まっている。…

※「cephalodia」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