New species of the xenophyophore genus Aschemonella (Rhizaria: Foraminifera) from areas of the abyssal eastern Pacific licensed for polymetallic nodule exploration
Type | Article | ||||||||
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Date | 2018-03 | ||||||||
Language | English | ||||||||
Author(s) | Gooday Andrew J.1, Holzmann Maria2, Caulle Clemence3, Goineau Aurelie1, Jones Daniel Ob1, Kamenskaya Olga4, Simon-Lledo Erik1, Weber Alexandra A. -T.1, 5, Pawlowski Jan2 | ||||||||
Affiliation(s) | 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 : Inst Francais Rech Exploitat Mer, Ctr Bretagne, ZI Pointe Diable, CS 10070, F-29280 Plouzane, France. 4 : Russian Acad Sci, Shirshov Inst Oceanol, 36 Nahimovskiy Prospekt, Moscow 117997, Russia. 5 : Univ Basel, Zool Inst, Vesalgasse 1, CH-4051 Basel, Switzerland. |
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Source | Zoological Journal Of The Linnean Society (0024-4082) (Oxford Univ Press), 2018-03 , Vol. 182 , N. 3 , P. 479-499 | ||||||||
DOI | 10.1093/zoolinnean/zlx052 | ||||||||
WOS© Times Cited | 14 | ||||||||
Keyword(s) | abyssal megafauna, biodiversity, Clarion-Clipperton Zone, deep-sea benthos, deep-sea mining, protist | ||||||||
Abstract | We describe Aschemonella monile Gooday and Holzmann sp. nov. from the Clarion-Clipperton Zone (CCZ, abyssal eastern equatorial Pacific), a region characterized by commercially significant concentrations of polymetallic nodules. The new species is the most abundant xenophyophore (giant agglutinated foraminifera) in our main sampling area (12-14 degrees N; 116 degrees 30'-117 degrees 26'W). Additional specimens originate from the central CCZ, and from a third area, similar to 900 km NW of the main area, where A. monile numerically dominates the megabenthos in photographic surveys of the seafloor (average densities 1.54 individuals/m(2); peak densities > 3 individuals/m(2)). Aschemonella monile is much larger (>= 7 cm in length) than previously described species of the genus, with a test comprising an irregular sequence of self-contained, partly overlapping 'segments', creating a multichambered structure. A similar, much rarer species from the main study area, described here as Aschemonella aspera Gooday and Holzmann sp. nov., has an unsegmented test with a very rough, coarsely agglutinated wall. Genetic data suggest that A. monile is distinct from A. aspera and most closely related to a group comprising Rhizammina algaeformis and Aschemonella ramuliformis. Both new species have delicate tests that are often attached to nodule surfaces, making them particularly vulnerable to seafloor disturbances. |
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