FN Archimer Export Format PT J TI New species of the xenophyophore genus Aschemonella (Rhizaria: Foraminifera) from areas of the abyssal eastern Pacific licensed for polymetallic nodule exploration BT AF GOODAY, Andrew J. HOLZMANN, Maria CAULLE, Clemence GOINEAU, Aurelie JONES, Daniel OB KAMENSKAYA, Olga SIMON-LLEDO, Erik WEBER, Alexandra A. -T. PAWLOWSKI, Jan AS 1:1;2:2;3:3;4:1;5:1;6:4;7:1;8:1,5;9:2; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:; C1 Univ Southampton, Natl Oceanog Ctr Southampton, Waterfront Campus,European Way, Southampton SO14 3ZH, Hants, England. Univ Geneva, Dept Genet & Evolut, Quai Ernest Ansermet 30, CH-1211 Geneva 4, Switzerland. Inst Francais Rech Exploitat Mer, Ctr Bretagne, ZI Pointe Diable, CS 10070, F-29280 Plouzane, France. Russian Acad Sci, Shirshov Inst Oceanol, 36 Nahimovskiy Prospekt, Moscow 117997, Russia. Univ Basel, Zool Inst, Vesalgasse 1, CH-4051 Basel, Switzerland. C2 UNIV SOUTHAMPTON, UK UNIV GENEVA, SWITZERLAND Inst Francais Rech Exploitat Mer, Ctr Bretagne, ZI Pointe Diable, CS 10070, F-29280 Plouzane, France. PP SHIRSHOV OCEANOL INST, RUSSIA UNIV BASEL, SWITZERLAND IF 2.909 TC 14 UR https://archimer.ifremer.fr/doc/00435/54663/56099.pdf LA English DT Article DE ;abyssal megafauna;biodiversity;Clarion-Clipperton Zone;deep-sea benthos;deep-sea mining;protist AB 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. PY 2018 PD MAR SO Zoological Journal Of The Linnean Society SN 0024-4082 PU Oxford Univ Press VL 182 IS 3 UT 000427880300001 BP 479 EP 499 DI 10.1093/zoolinnean/zlx052 ID 54663 ER EF