Pailles C., Sylvestre Florence, Escobar J., Tonetto A., Rustig S., Mazur J. C. (2018). Cyclotella petenensis and Cyclotella cassandrae, two new fossil diatoms from Pleistocene sediments of Lake Peten-Itza, Guatemala, Central America. Phytotaxa, 351 (4), p. 247-263. ISSN 1179-3155.
Titre du document
Cyclotella petenensis and Cyclotella cassandrae, two new fossil diatoms from Pleistocene sediments of Lake Peten-Itza, Guatemala, Central America
Pailles C., Sylvestre Florence, Escobar J., Tonetto A., Rustig S., Mazur J. C.
Source
Phytotaxa, 2018,
351 (4), p. 247-263 ISSN 1179-3155
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.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
;
Géologie et formations superficielles [064]
;
Etudes, transformation, conservation du milieu naturel [082]
