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Issue: Vol. 760 No. 2: 4 Jun. 2026
Type: Article
Published: 2026-06-04
DOI: 10.11646/phytotaxa.760.2.3
Page range: 138-148
Abstract views: 0
PDF downloaded: 0

Middle Miocene Aulacoseira khankaica sp. nov. (Bacillariophyta), a new centric diatom from the Russian Far East

Federal Scientific Center of the East Asia Terrestrial Biodiversity; FEB RAS; 159/1; Pr-t 100-let Vladivostoka; 690022; Vladivostok; Russia
Federal Scientific Center of the East Asia Terrestrial Biodiversity; FEB RAS; 159/1; Pr-t 100-let Vladivostoka; 690022; Vladivostok; Russia
Department of Mycology and Algology; Faculty of Biology; M.V. Lomonosov Moscow State University; 1; Leninskiye Gory; 119899; Moscow; Russia
Algae Bacillariophyta fossil morphology ultrastructure palaeoecology Miocene Climatic Optimum Primorsky Kray

Abstract

The present paper describes the diatom species Aulacoseira khankaica sp. nov. based on detailed light and scanning electron microscopy observations. Its morphological features are compared with those of similar Aulacoseira species. The new species is described from the Middle Miocene sediments of the Khanka Basin, Primorsky Kray (Russian Far East). Aulacoseira khankaica is characterized by short chains joined by spatulate spines, straight rows of small areolae on the valve mantle, a narrow ringleiste and sessile rimoportulae located on the valve rim. The finding of A. khankaica provides additional information on the distribution of centric diatoms in the Middle Miocene.

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How to Cite

Avramenko, A.S., Cherepanova, M.V. & Georgiev, A.A. (2026) Middle Miocene Aulacoseira khankaica sp. nov. (Bacillariophyta), a new centric diatom from the Russian Far East. Phytotaxa 760 (2): 138–148. https://doi.org/10.11646/phytotaxa.760.2.3