<i>ENTOMONEIS CENTROSPINOSA</i>SP. NOV., A BRACKISH DIATOM WITH RAPHE-BEARING KEEL

Osada, Keigo; Kobayasi, Hiromu

doi:10.1080/0269249x.1990.9705128

Cited by 8 publications

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“…Some species possess unique characters. For example, E. centrospinosa Osada & Kobayasi has 1(0)–3 spines on each side of the central nodule ( Osada and Kobayasi 1990b ) and E. annagodheae Al-Handal & Mucko has an obliquely transapical fascia ( Al-Handal et al 2020a , b ). The striae in Entomoneis can be uniseriate (e.g.…”

Section: Introductionmentioning

confidence: 99%

Ultrastructure of three Species of Entomoneis (Bacillariophyta) from Lake Qinghai of China, with reference to the external areola occlusions

Long¹,

Williams²,

Liu³

et al. 2022

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Three sympatric Entomoneis species, found at the same specific locality in Lake Qinghai, China, are studied by using light and scanning electron microscope. Two species are proposed as new to science and named as E. sinensis sp. nov. and E. qinghainensis sp. nov. The third species is identified as E. paludosa (W. Smith) Reimer. Entomoneis sinensis has a linear-lanceolate valve outline and Ƨ-shaped keel, bears two distinct 8-shaped loops formed by the valvocopula pars media in each cell and each of its stria is composed of either a long hymen strip or a long hymen strip plus one separated areola close to the raphe. Its hymen strip belongs to Type Two, which is a siliceous membrane strip perforated by two rows of linear pores next to transapical costae and two rows of rounded pores between these two rows of linear pores. Entomoneis qinghainensis has large cells, very high keel and evident hymen strip regions like a U-shaped neck pillow at the middle of valve face. Its hymen strip belongs to Type One, which is a siliceous membrane strip perforated by irregularly distributed round pores. Entomoneis paludosa also has the hymen strip regions that are worm-like and close to the raphe canal. Its hymen strip is same as that of E. qinghainensis. The two kinds of the outside areola occlusions in Entomoneis are compared, summarised and discussed.

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