Vieira Leandro M, Stampar Sergio N
Centro de Biologia Marinha, Universidade de São Paulo, São Sebastião, SP 11600-000, Brazil.; Email:
Universidade Estadual Paulista "Júlio De Mesquita Filho", Faculdade de Ciências e Letras de Assis, Departamento de Ciências Biológicas, Laboratório de Biologia Aquática - LABIA, Av. Dom Antonio, 2100, Assis, SP, 19806-900, Brazil; Email: unknown.
Zootaxa. 2014 Mar 21;3780:365-74. doi: 10.11646/zootaxa.3780.2.8.
A new species of cheilostome bryozoan, Fenestrulina commensalis n. sp., was collected in December 2008 by scuba at 5-10 meters depth at Guaibura Beach, Guarapari, Espírito Santo state, southeastern Brazil. The specimen was found associated with tubes of the cerianthid Pachycerianthus sp., representing the first commensal association between a bryozoan and a tube-dwelling anemone. Fenestrulina commensalis n. sp. is the third species of the genus found in Brazilian waters; it is distinguished from other Atlantic species of Fenestrulina by its small angular orificial condyles, a single oral spine and basal anchoring rhizoids arising from abfrontal pore chambers. Morphological adaptations to encrust the tubes of cerianthids include anchoring rootlets and weakly contiguous zooids. These morphological features allow the colony the flexibility to grow around the tube and feed relatively undisturbed by silt and detritus, being raised well above the soft-sediment substratum in which the tube-anemone grows.
2008年12月，在巴西东南部圣埃斯皮里图州瓜拉帕里的瓜伊布拉海滩，通过水肺潜水在5至10米深处采集到一种新的唇口目苔藓虫，共栖窗苔藓虫（Fenestrulina commensalis n. sp.）。该标本是在与海葵目厚海葵属（Pachycerianthus sp.）的管状物共生时被发现的，这代表了苔藓虫与管栖海葵之间的首次共栖关系。共栖窗苔藓虫（Fenestrulina commensalis n. sp.）是在巴西水域发现的该属的第三个物种；它与其他大西洋窗苔藓虫物种的区别在于其小的角状口突、单个口刺以及从额外孔室生出的基部固着根状茎。对厚海葵管进行包被的形态学适应包括固着小根和弱相邻的个虫。这些形态特征使群体能够灵活地围绕管子生长，并在相对不受淤泥和碎屑干扰的情况下进食，高高地生长在管栖海葵生长的软质沉积物基质之上。
