A New Cheilostome Bryozoan Genus Pseudoplanktonic on Molluscs and Algae
A New Cheilostome Bryozoan Genus Pseudoplanktonic on Molluscs and Algae
复制标题
软体动物和藻类上的一新拟浮游唇口动物苔藓动物属
DOI：
10.2307/3226923
复制
发表时间：
1997
影响因子：
1.2
通讯作者：
N. Monks
中科院分区：
文献类型：
--
作者：
P. Taylor;N. Monks
本文重新描述了一种鲜为人知的苔藓虫膜孔虫（MembraniporaeburneaHINCKS），并将其命名为水母属（Jellyella）新属的模式种。这种软坚果级唇口类的孪生祖先将其置于膜孔菌科，与膜孔菌属和双孔菌属沿着。Jellyella的特点是存在错综复杂的分支过程（刺）突出到zooidal室，和横向排列的，细长的纺锤体的钙化骨骼超微结构。“海湾杂草苔藓虫”，Membranipora tuberculata（Bosc），也被分配到新属Jellyella tuberculata。这两种水母似乎主要是在漂浮的基质上结壳：根据现有的博物馆资料，J. eburnea通常生长在头足类螺旋藻（Spirula）死亡个体的漂流壳上，但也可以作为漂浮腹足类Janthina的寄生虫和藻类; J. tuberculata通常是马尾藻的附生植物。在印度洋、太平洋和大西洋的海滩上采集到的螺旋藻贝壳通常被J. eburnea包裹，但很少被其他苔藓虫包裹。Jellyella因此被解释为典型的底栖苔藓动物中的一个罕见的例子。附加关键词：膜孔菌科，黑膜孔菌，M. tuberculata，Spirula，
The little-known bryozoan Membranipora eburnea HINCKS is redescribed and designated the type species of the new genus Jellyella. The twinned ancestrula of this malacostegan-grade cheilostome places it within the Membraniporidae, along with Membranipora and Biflustra. Jellyella is distinguished by the presence of intricately branched processes (spinules) projecting into the zooidal chambers, and a calcitic skeletal ultrastructure of transversely arranged, elongate spindles. The "Gulf weed bryozoan," Membranipora tuberculata (Bosc), is also assigned to the new genus as Jellyella tuberculata. Both species of Jellyella seem primarily to encrust floating substrates: based on available museum material, J. eburnea usually grows on drifting shells of dead individuals of the cephalopod Spirula but can also be found as an epizoan of the floating gastropod Janthina and on algae; J. tuberculata is normally an epiphyte of Sargassum. Collections of Spirula shells from beaches around the Indian, Pacific, and Atlantic Oceans are commonly encrusted by J. eburnea but very seldom by any other bryozoans. Jellyella is therefore interpreted as a rare example of a pseudoplanktonic genus among the typically benthic bryozoans. Additional key words: Membraniporidae, Membranipora eburnea, M. tuberculata, Spirula,