FN Archimer Export Format
PT J
TI Taxonomic revision of     Spiniferites elongatus     (the resting stage of     Gonyaulax elongata     ) based on morphological and molecular analyses
BT 
AF VAN NIEUWENHOVE, Nicolas
   POTVIN, Eric
   HEIKKILA, Maija
   POSPELOVA, Vera
   MERTENS, Kenneth
   MASURE, Edwige
   KUCHARSKA, Malgorzata
   YANG, Eun Jin
   CHOMERAT, Nicolas
   ZAJACZKOWSKI, Marek
AS 1:1,7;2:2;3:3,7;4:4;5:5;6:6;7:8;8:2;9:5;10:8;
FF 1:;2:;3:;4:;5:PDG-ODE-LITTORAL-LERBO;6:;7:;8:;9:PDG-ODE-LITTORAL-LERBO;10:;
C1 Geol Survey Denmark & Greenland, Dept Glaciol & Climate, Copenhagen K, Denmark.
   Aarhus Univ, Dept Geosci, Aarhus, Denmark.
   Korea Polar Res Inst, Div Polar Ocean Environm, Incheon, South Korea.
   Univ Helsinki, Dept Environm Sci, ECRU, Helsinki, Finland.
   Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC, Canada.
   IFREMER, LER BO, Stn Biol Marine, Pl Croix, Concarneau, France.
   Univ Pierre & Marie Curie Paris, UMR CNRS, Paris, France.
   Polish Acad Sci, Inst Oceanol, Dept Marine Ecol, Sopot, Poland.
C2 GEUS, DENMARK
   UNIV AARHUS, DENMARK
   KOPRI, SOUTH KOREA
   UNIV HELSINKI, FINLAND
   UNIV VICTORIA, CANADA
   IFREMER, FRANCE
   UNIV PARIS 06, FRANCE
   POLISH ACAD SCI, POLAND
SI CONCARNEAU
SE PDG-ODE-LITTORAL-LERBO
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 1.253
TC 10
UR https://archimer.ifremer.fr/doc/00471/58305/60846.pdf
LA English
DT Article
DE ;Single-cell PCR;Spiniferites ellipsoideus;Spiniferites frigidus;Rottnestia amphicavata;morphologic variability;taxonomy
AB We restudied the morphological complex comprising the cyst-based species Spiniferites elongatus/Spiniferites frigidus/Rottnestia amphicavata. We reviewed existing studies, and acquired new morphometric measurements of recent cysts from across the Northern Hemisphere, scanning electron microscopy (SEM) observations of cysts from Barents Sea surface sediments, and genetic analyses of cysts from the Beaufort Sea. The measurements suggest that populations and morphospecies cannot be distinguished based on morphometric criteria. Furthermore, sequential sediment trap samples from Hudson Bay reveal that morphological variation can occur at the same location over a few weeks, arguing against a uniform morphological response to environmental parameters. The SEM observations reveal a consistent gonyaulacacean tabulation (Po, 4′, 6′′, 6c, 5 s, *6′′′, 1p, 1′′′′). The small and large subunit ribosomal RNA genes and the internal transcribed spacer sequences obtained from differing cysts from the Beaufort Sea with morphologies attributable to the complex, including forms that correspond to Rottnestia amphicavata, were all identical and conform to those of Gonyaulax elongata from the Orkney Islands. The molecular analyses thus support the conclusion that the morphological variability is not reflected genetically and occurs within one species. Based on arguments against the generic attribution of amphicavata to Rottnestia, the continuum between the extreme ends of the morphological range, and the molecular data, we suggest Rottnestia amphicavata to be conspecific with Spiniferites frigidus, and both to be junior synonyms of Spiniferites elongatus. The morphometric data further indicate that Spiniferites ellipsoideus, an elongate cyst from the Miocene, can also be considered a junior synonym of Spiniferites elongatus. It is recommended to use two informal types in census work (i.e. Spiniferites elongatus – Beaufort morphotype for morphologies formerly assignable to Spiniferites frigidus/Rottnestia amphicavata, and Spiniferites elongatus – Norwegian morphotype for cysts with strongly reduced processes) to separate specimens at both extreme ends of the morphological spectrum from typical specimens of Spiniferites elongatus. 
PY 2018
PD DEC
SO Palynology
SN 0191-6122
PU Taylor & Francis Inc
VL 42
IS Supl.1
UT 000453398000007
BP 111
EP 134
DI 10.1080/01916122.2018.1465736
ID 58305
ER

EF