Phillipsiidae

Japanese: Phillipsiidae
Phillipsiidae

...The number of Phacops species decreased from the Silurian to the Devonian, but they reached their peak during this period. In the Carboniferous and Permian periods, only members of the Phillipsiidae family remained as major species, and they became extinct at the end of the Permian period. Recent research has shown that the Cambrian to Ordovician minor arthropods ( Agnostus , for example) are closer to crustaceans than trilobites due to the shape of their appendages, and their classification is being reconsidered.

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…シルル紀からデボン紀にかけて減少はするが,ファコプス類Phacopsはこのころ全盛となる。石炭紀,二畳紀にはフィリップシア科Phillipsiidaeのもののみが主要種として残るだけになり,二畳紀末をもって絶滅する。カンブリア紀~オルドビス紀の少節類(アグノスツスAgnostusが例)について,最近の研究では,付属肢の形態により三葉虫よりも甲殻類型に近いといわれるようになり,分類が見直されている。…

※「Phillipsiidae」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

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