%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Pailles, C.
%A Sylvestre, Florence
%A Escobar, J.
%A Tonetto, A.
%A Rustig, S.
%A Mazur, J. C.
%T Cyclotella petenensis and Cyclotella cassandrae, two new fossil diatoms from Pleistocene sediments of Lake Peten-Itza, Guatemala, Central America
%D 2018
%L fdi:010073086
%G ENG
%J Phytotaxa
%@ 1179-3155
%K Diatom ; Cyclotella ; Pleistocene ; Lake Peten-Itza ; Guatemala
%K GUATEMALA
%K PETEN ITZA LAC
%M ISI:000434265400001
%N 4
%P 247-263
%R 10.11646/phytotaxa.351.4.1
%U https://www.documentation.ird.fr/hor/fdi:010073086
%> https://www.documentation.ird.fr/intranet/publi/2018/06/010073086.pdf
%V 351
%W Horizon (IRD)
%X While analyzing the fossil diatom flora in one of the longest paleolimnological records (core PI-6) from Lake Peten-Itza, lowland Guatemala, we encountered Aulacoseira Thwaites, Cyclotella (Kutzing) and Discostella (Cleve & Grunow) Houk & Klee species appearing successively in the record. Among them, two new species that are assigned to the genus Cyclotella are described herein. Cyclotella petenensis sp. nov. is characterised by a coarse striation marked by a shadow line and a tangentially undulate central area with an arc of central fultoportulae. Cyclotella cassandrae sp. nov. has an elliptically shaped valve, coarse striae and a scattered ring of central fultoportulae in the central area. Classification and differences to similar taxa in the genus Cyclotella are discussed.
%$ 064 ; 082 ; 034