The origin and early phylogeny of the Cheilostomatous Bryozoa
The origin and early phylogeny of the Cheilostomatous Bryozoa
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唇口苔藓虫的起源和早期系统发育
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发表时间：
1975
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通讯作者：
J. Dzik
中科院分区：
文献类型：
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作者：
J. Dzik
Cheilostomata的系统发育已初步重建，从最古老的上侏罗纪jorms开始，通过卵母细胞、膜周棘和avicularia的连续形成，直到通过隐囊的发育或棘的融合形成第二前缘壁。指出了原始Cheilostomata和Cyclostomata的异形壁结构的显著相似之处。原始的、口孔状的环状气孔是Cheilostomata的祖先。毛纹气孔动物也从与毛口动物相同的形态进化而来。对苔藓虫群落的多态性和形态梯度进行了初步的生物学解释。在波兰白垩纪发现了7种Cheilostomata和一个新属Wawalia gen.n。和一个新的家庭，瓦瓦利德科。已经竖立起来了。
The phylogenetic development of the Cheilostomata has tentatively been reconstructed from the oldest, Upper Jurassic jorms, not developing heterozoecia, through the successive formation of ovicells, peristomial spines and avicularia, up to the formation of a secondary frontal wall by the development of cryptocyste or by the fusion of spines. Significant similarities in the structure of the zoecial wall of primitive Cheilostomata and Cyclostomata are stated. The hypothesis has been formed that primitive, stomatoporoidal Cyclostomata were the ancestors of the Cheilostomata. The Ctenostomata evolved also from the same forms as the Cheilostomata. A tentative biological interpretation of polymorphism and morphological gradient in a bryozoan colony has also been conducted. Seven species of the Cheilostomata have been described from the Cretaceous of Poland and a new genus, Wawalia gen.n. and a new family, Wawaliidae fam.n. have been erected.