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A new species of Isodictya (Porifera: Poecilosclerida) from the Southern Ocean

机译:来自南海的新物种Isodictya(Porifera:Poecilosclerida)

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摘要

We discovered a new species of Porifera belonging to the genus Isodictya Bowerbank, 1864 during cruises aboard R/V Hesperides in Antarctica. Collected samples are mostly part of the surveys of the Spanish project BENTART whose main objective has been to study the benthic communities inhabiting sea bottoms of Livingston and Deception Island in the South Shetlands archipelago and the Antarctic Peninsula. Isodictya filiformis sp. nov., described here, is characterized by its fragile and thin morphology (very different from other known species in the area) and by having microxeas as additional microscleres. Three specimens were collected from Marguerite Bay, Low Island and Deception Island (Antarctic Peninsula) and one specimen at Peter I Island (Bellingshausen Sea). Its presence in Peter Island is quite relevant as this location is 390 km away from the nearest coast in the Bellingshausen Sea, an area that has scarcely been investigated in the past. However, results from the Bentart 03 Expedition seem to indicate that Peter I Island has a wide variety of benthic organisms, in contrast to the deep adjacent areas of Bellingshausen Sea. Apart from the morphological analyses, we place the new Isodictya species within its phylogenetic context using two nuclear markers (18S rDNA and 28S rDNA) and provide some information about the ecological preferences of the new species.
机译:我们发现了一个新的Porifera属于Isodictya Bowerbank,1864年在南极洲的r / v默特尔德的游轮期间。收集的样本主要是西班牙项目Bentart调查的一部分,其主要目标是研究植物斯顿和欺骗岛海底的底栖社区在南方赛普罗拉戈和南极半岛。 Isodictya filiformis sp。 11月。这里描述的,其特征在于其脆弱和薄的形态(非常不同于该区域中的其他已知种类),并且通过使Microxeas作为额外的微克。从玛格丽特湾,低岛屿和尖耳半岛(南极半岛)和一个标本收集了三种标本,并在彼得I岛(Bellingshausen Sea)。它在彼得岛的业务非常相关,距离Bellingshausen Sea最近的海岸有390公里,这是一个几乎在过去调查的地区。然而,Bentart 03探险的结果似乎表明彼得I岛具有各种各样的底栖生物,与Bellingshausen海的深邻区相反。除了形态学分析之外,我们使用两种核标记物(18s rdna和28s rdna)将新的Isodictya物种置于其系统发育语境中,并提供有关新物种生态偏好的一些信息。

著录项

  • 来源
    《Polar biology》 |2020年第5期|523-533|共11页
  • 作者单位

    Ctr Oceanog Gijon Inst Espanol Oceanog C Principe de Asturias 70 Bis Gijon 33212 Asturias Spain|Univ Alcala De Henares Dept Ciencias Vida EU US Marine Biodivers Grp Alcala De Henares 28871 Spain;

    Nat Hist Museum London Dept Life Sci Cromwell Rd London SW7 5BD England;

    Nat Hist Museum London Dept Life Sci Cromwell Rd London SW7 5BD England|Univ Autonoma Madrid Fac Ciencias Dept Biol Zool E-28049 Madrid Spain;

    Ctr Oceanog Gijon Inst Espanol Oceanog C Principe de Asturias 70 Bis Gijon 33212 Asturias Spain|Univ Alcala De Henares Dept Ciencias Vida EU US Marine Biodivers Grp Alcala De Henares 28871 Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Taxonomy; Biodiversity; Phylogeny; Bellingshausen Sea; Peter I island; Antarctica;

    机译:分类;生物多样性;系统发育;Bellingshausen Sea;彼得I岛;南极洲;

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