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Agoniatitida
Agoniatitida, also known as the Anarcestida, is the ancestral order within the cephalopod Subclass Ammonoidea, that lived in what would become Africa, Asia, Australia, Europe, and North America during the Devonian from about 410—385 mya, existing for approximately 25 million years.
==Taxonomic nomenclature==
The Order Agoniatitida, named by Ruzhencev, 1957,〔(PaleoBiology Database: Agoniatitida, basic info )〕 is a subjective synonym for the Order Anarcestida, named by Miller and Furnish, 1954.〔Miller, Furnish, and Schindewolf, 1957; Paleozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part-L, Ammonoidea, Geological Society of America & Univ of Kansas.〕 Accordingly, the name Anarcerstida is based on the family Anarcestidae (ex Anarcestinae) of Steinmann 1890. That of Agoniatiida is based on the family Agnoniatidae of Holzapfel, 1899.
Saunders, Work, and Nikolaeva, 1999,〔( Evolution of Complexity in Paleozoic Ammonoid Sutures; Supplementary Materia )〕 refer to the Anarcestida, with Agoniatina a suborder, maintaining the priority as found in the Treatise. Shevyrev, 2006 〔A. A. Shevyrev. 2006. The cephalopod macrosystem: A historical review, the present state of knowledge, and unsolved problems: 3. Classification of Bactritoidea and Ammonoidea. Paleontological Journal 40(2):150-161〕 on the other hand follows Ruzhencev, 1957 and used Agonititida.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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