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DOI: http://dx.doi.org/10.11646/phytotaxa.273.1.2

A new species, Navicula lothargeitleri sp. nov., within the Navicula cryptocephala complex (Bacillariophyceae)

ALOISIE POULÍČKOVÁ, JIŘÍ NEUSTUPA, PETR HAŠLER, ONDŘEJ TOMANEC, EILEEN J. COX

Abstract


Recently published phylogenetic analyses of 52 strains of Navicula cryptocephala-like diatoms confirmed the existence of genetically distinct lineages within N. cryptocephala: clade I “RBG” and clade II “Lubnaig”. Using geometric morphometry, we compared strains of both clades with the lectotype and found that clade I represents N. cryptocephala sensu stricto, while clade II constitutes a different taxon, for which we establish a new species, Navicula lothargeitleri sp. nov. Both species can be distinguished by their interphase nucleus structure. Slight differences in valve morphology are described and discussed.


Keywords


cryptic diversity, Navicula lothargeitleri sp. nov., epipelon, morphology, genetic, cytology, Algae

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