Knight-Jones Phyllis, Darbyshire Teresa, Petersen Mary E, Tovar-Hernández María Ana
School of Biological Sciences, University of Wales, Swansea SA2 8PP, UK..
Zootaxa. 2017 Apr 12;4254(2):201-220. doi: 10.11646/zootaxa.4254.2.3.
A neotype of Amphitrite Müller (1771) is established and re-described, using material collected in 2001 from near the type locality on the southwest coast of Iceland. We examined material from Iceland, Nova Scotia and Newfoundland, identified as Pseudopotamilla reniformis, showing scissiparity and commonly found in aggregations within kelp holdfasts or amongst encrusting fauna. By contrast, scissiparity has not been seen in a population recorded as P. reniformis from Wales (broadcast spawning is presumed, Chughtai & Knight-Jones 1988), which bores into limestone and that the present analysis shows to belong to a different species from P. reniformis. Sabella oculata Krøyer (1856, Norway) is a junior synonym of P. reniformis. Sabella aspersa Krøyer (1856, Greenland) and Sabella saxicava (Quatrefages, 1866, France) are re-instated and re-described in Pseudopotamilla. Pseudopotamilla saxicava (= Potamilla ehlersi Gravier, 1906) has a widespread distribution from Britain to the Arabian Gulf, Pseudopotamilla aspersa is found in Greenland and the distribution of P. reniformis is reduced to Iceland, northern Norway, Nova Scotia and Newfoundland. The genera Eudistylia Bush and Schizobranchia Bush are discussed in relation to Pseudopotamilla.
基于2001年在冰岛西南海岸模式产地附近采集的标本，建立并重新描述了米勒盘管虫（Amphitrite Müller，1771）的新模式标本。我们检查了来自冰岛、新斯科舍和纽芬兰的标本，这些标本曾被鉴定为肾形拟盘管虫（Pseudopotamilla reniformis），具有裂体生殖现象，常见于海带固着器内或附着生物群落中。相比之下，在威尔士记录为肾形拟盘管虫的种群中未观察到裂体生殖现象（推测为散播式产卵，Chughtai & Knight-Jones，1988），该种群会钻入石灰岩，目前的分析表明它与肾形拟盘管虫属于不同物种。挪威盘管虫（Sabella oculata Krøyer，1856）是肾形拟盘管虫的次异名。格陵兰盘管虫（Sabella aspersa Krøyer，1856）和岩生盘管虫（Sabella saxicava，Quatrefages，1866，法国）被重新归入拟盘管虫属并重新描述。岩生拟盘管虫（Pseudopotamilla saxicava = Potamilla ehlersi Gravier，1906）分布广泛，从英国到阿拉伯湾均有发现；格陵兰拟盘管虫（Pseudopotamilla aspersa）分布于格陵兰；而肾形拟盘管虫的分布范围缩小至冰岛、挪威北部、新斯科舍和纽芬兰。还讨论了真盘管虫属（Eudistylia Bush）和裂鳃虫属（Schizobranchia Bush）与拟盘管虫属的关系。
