Representatives of the genus Botryosella Schrammen, 1912 (Porifera, Hexactinellida) from the Upper Cretaceous of the Volga region

Evgeny M. Pervushov
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Abstract

Among the numerous and diversiform Late Cretaceoussiliceousspongescollected throughout the Volgaregion,severalrepresentatives of the genus Botryosella have been encountered, previously unknown for the area. Analysis of the skeleton morphology, peculiar for massive transverse outgrowths, confirms manifestations of isomorphism in Hexactinellids and the opinion of inaccuracies available in the descriptive terminology applied to the skeletal morphology of this Porifera group.
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伏尔加地区上白垩纪Botryosella Schrammen属代表,1912 (Porifera, Hexactinellida)
在伏尔加地区收集到的数量众多、种类繁多的晚白垩纪硅海绵中,人们发现了一些以前在该地区未知的Botryosella属的代表。对大量横向生长的骨骼形态进行分析,证实了Hexactinellids中同构的表现,以及对该Porifera类群骨骼形态描述术语的不准确性的看法。
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