著者
遠藤 一佳
出版者
日本古生物学会
雑誌
化石 (ISSN:00229202)
巻号頁・発行日
no.81, pp.57-66, 2007-03-30
参考文献数
64

Recent hypotheses regarding the origin and body plan evolution of brachiopods are reviewed. Brachiopods are firmly placed within the lophotrochozoa, one of three major bilaterian lineages revealed by molecular phylogeny. Comparisons of mitochondrial gene arrangements further suggest that brachiopods are closer to annelids than to molluscs, a scheme supported by morphological comparisons of Cambrian fossils, including those of halkieriids and wiwaxiids. Any scenario explaining the brachiopod origin may involve curling of the dorso-ventral axis along the anterior-posterior axis. This hypothesis could partly be tested by methods of molecular developmental biology. Some potential pitfalls of this approach are discussed with reference to the deuterostome-like features of brachiopods and to the ubiquity of co-option of developmentally important genes.

言及状況

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@mokkan_shinocha 最近のハルキエリアの系統位置は詳しくないですが腕足動物の祖先であるという仮説に基づくなら、軟体・環形の間に腕足が来ることはそれほど突飛には見えないです。また構造的に箒虫と腕足の関連性は前から指摘されておりこちらも同様。紐形は知識不足 https://t.co/NlmjQ42RDS

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