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Dacryoconarida is an extinct subclass of free living animals from the Tentaculita class, which were common in the Devonian oceans (Fisher, 1962). Dacryoconarids have a subspherical, drop- or tear-shaped embryonic chamber (Farsan 2005). Their affinity is unknown; they have often been placed among molluscs. Their fossils are known from Devonian rocks of Australia, Asia, Europe, North Africa and North America. ==References== * Farsan, N.M. 2005. Description of the early ontogenetic part of the Tentaculitids, with implications for classification. Lethaia 38: 255-270. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Dacryoconarida」の詳細全文を読む スポンサード リンク
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