Re-examination of the type materials of Navicula exilis and Navicula cryptocephala (Naviculaceae, Bacillariophyceae)

INGRID JÜTTNER; DMITRY CHUDAEV; WOLF-HENNING KUSBER

doi:10.11646/phytotaxa.472.2.3

Issue: Vol. 472 No. 2: 23 November 2020

Type: Article

Published: 2020-11-23

DOI: 10.11646/phytotaxa.472.2.3

Page range: 123–134

Abstract views: 18

PDF downloaded: 1

**Re-examination of the type materials of Navicula exilis and Navicula cryptocephala (Naviculaceae, Bacillariophyceae)**

INGRID JÜTTNER⁺⁻
DMITRY CHUDAEV⁺⁻
WOLF-HENNING KUSBER⁺⁻

Department of Natural Sciences, Amgueddfa Cymru – National Museum Wales, Cathays Park, Cardiff, CF10 3NP, UK.

Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory 1, building 12, Moscow, 119234, Russia.

Botanischer Garten und Botanisches Museum Berlin, Freie Universität Berlin, Königin-Luise-Str. 6-8, 14195 Berlin, Germany.

diatoms morphology Navicula taxonomy types ultrastructure Algae

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Abstract

Type material of Navicula exilis and Navicula cryptocephala from the Kützing collection at the Natural History Museum, London, was re-investigated in light and electron microscopy. The morphology of these species was studied in detail using original materials and the nomenclature and previous studies of type material summarized. Navicula exilis is compared with Navicula cryptocephala, Navicula cryptocephala var. exilis, Navicula lothargeitleri and Navicula adversa.