Xenophyophores (Rhizaria, Foraminifera) from the Eastern Clarion-Clipperton Zone (equatorial Pacific): the Genus Psammina

被引：16

作者：

Gooday, Andrew J. ^{[1
]}

Holzmann, Maria ^{[2
]}

Goineau, Aurelie ^{[1
]}

Kamenskaya, Olga ^{[3
]}

Melnik, Vyacheslav F. ^{[4
]}

Pearce, Richard B. ^{[5
]}

Weber, Alexandra A-T ^{[1
,6
]}

Pawlowski, Jan ^{[2
]}

机构：

[1] Univ Southampton, Natl Oceanog Ctr Southampton, Waterfront Campus,European Way, Southampton SO14 3ZH, Hants, England

[2] Univ Geneva, Dept Genet & Evolut, Quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland

[3] Russian Acad Sci, Shirshov Inst Oceanol, Nakhimovsky Prosp 36, Moscow 117997, Russia

[4] Joint Stock Co Yuzhmorgeologiya, Krymskaya St 20, Gelendzhik 353461, Russia

[5] Univ Southampton, Natl Oceanog Ctr Southampton, Ocean & Earth Sci, Waterfront Campus,European Way, Southampton SO14 3ZH, Hants, England

[6] Museum Victoria, Marine Invertebrates Sci, GPO Box 666, Melbourne, Vic 3000, Australia

来源：

PROTIST | 2018年 / 169卷 / 06期

基金：

瑞士国家科学基金会; 俄罗斯科学基金会;

关键词：

Agglutinated foraminifera; monothalamids; new species; SSU rDNA sequences; deep-sea mining; polymetallic nodules; POLYMETALLIC NODULES; FRACTURE-ZONE; ABYSSAL; ATLANTIC; PROTISTA; DIVERSITY; AREA;

D O I：

10.1016/j.protis.2018.09.003

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Xenophyophores are important megafaunal organisms in the abyssal Clarion-Clipperton Zone (CCZ; equatorial Pacific), a region hosting commercially significant deposits of polymetallic nodules. Previous studies assigned those with attached, fan-like tests to Psammina limbata, a species described from the central CCZ based on morphology. Here, we redescribe the holotype of P. limbata and then show that limbata-like morphotypes collected in the eastern CCZ include three genetically distinct species. Psammina aft limbata is closest morphologically to P. limbata. The others are described as P. microgranulata sp. nov. and P. rotunda sp. nov. These fan-shaped species form a well-supported clade with P. tortilis sp. nov., a morphologically variable species exhibiting features typical of both Psammina and Semipsammina. A second clade containing Psammina sp. 3, and two species questionably assigned to Galatheammina branches at the base of this group. The genus Psammina includes another 9 described species for which there are no genetic data, leaving open the question of whether Psammina as a whole is monophyletic. Our study increases the number of xenophyophore species described from the eastern CCZ from 8 to 11, with a further 25 morphotypes currently undescribed. Many additional species of these giant foraminifera undoubtedly await discovery in abyssal settings. (C) 2018 The Author(s). Published by Elsevier GmbH.

引用

页码：926 / 957

页数：32

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