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来自大西洋伊比利亚半岛岩石海岸潮上带的两种新缓步动物(真缓步纲:拉马佐蒂科、大生熊虫科)

Two new species of Tardigrada (Eutardigrada: Ramazzottiidae, Macrobiotidae) from the supralittoral zone of the Atlantic Iberian Peninsula rocky shores.

作者信息

Fontoura Paulo, Rubal Marcos, Veiga Puri

机构信息

Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo AlegrePorto, 4169-007 Porto, Portugal MARE, Marine and Environmental Sciences Centre, ISPA - Instituto Universitário, Rua Jardim do Tabaco 34, 1149-041, Lisboa, Portugal.

出版信息

Zootaxa. 2017 May 10;4263(3):450-466. doi: 10.11646/zootaxa.4263.3.2.

Abstract

Two new species of Eutardigrada were found in supralittoral lichens, growing on rocky shores at two localities of the Western Atlantic coast of the Iberian Peninsula. Ramazzottius littoreus sp. nov., found in San Cibrao (North of Spain), has the dorsal cuticle sculptured with small tubercles and claws with accessory points similar to R. oberhaeuseri. It can be distinguished from all the other known Ramazzottius species with the same type of cuticular sculpture by the dotted egg shell and the peculiar reticulation visible at the bulbous base of egg processes. Macrobiotus halophilus sp. nov., found in Cascais (Centre of Portugal), belongs to the Macrobiotus hufelandi group. The slightly wrinkled egg shell and egg processes in the shape of inverted chalice with dentate distal disc, identifies it as a member of the Macrobiotus persimilis subgroup. The new dioecious species differs from the six other species of the M. persimilis subgroup by a unique combination of some characters (small and very sparse circular cuticular pores, granulation on legs I-III and dentate lunules on legs IV), by measurements of some structures (claws and buccal apparatus), and by the number, dimension and shape of egg processes.

摘要

在伊比利亚半岛西大西洋沿岸两个地点的岩石海岸上生长的潮间带上部地衣中发现了两种新的缓步动物。新物种滨海拉马佐蒂缓步虫(Ramazzottius littoreus sp. nov.)发现于圣西夫拉奥(西班牙北部),其背角质层有小瘤雕刻,爪子有副尖,类似于奥氏拉马佐蒂缓步虫(R. oberhaeuseri)。通过蛋壳上的小点以及在卵突球茎基部可见的特殊网状结构,它可以与所有其他具有相同类型角质层雕刻的已知拉马佐蒂缓步虫物种区分开来。新物种嗜盐大生熊虫(Macrobiotus halophilus sp. nov.)发现于卡斯凯什(葡萄牙中部),属于胡氏大生熊虫(Macrobiotus hufelandi)类群。其蛋壳略有皱纹,卵突呈倒杯状,远端盘有齿,这表明它是近缘大生熊虫(Macrobiotus persimilis)亚组的成员。这个新的雌雄异体物种与近缘大生熊虫亚组的其他六个物种不同,在于一些特征的独特组合(小且非常稀疏的圆形角质层孔、第一至三对腿上的颗粒以及第四对腿上的齿状半月形)、一些结构的测量值(爪子和口器)以及卵突的数量、尺寸和形状。

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