Ultrastructural Studies on Some Mastogloia (Bacillariophyceae) Species Belonging to the Group Ellipticae

Stephens, F. Carol; Gibson, Robert

doi:10.1515/botm.1979.22.8.499

Cited by 19 publications

(29 citation statements)

References 3 publications

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“…Mastogloia is a large genus, found in brackish and marine habitats, and traditionally characterized by the possession of partectal chambers on its valvocopulae. Because of its morphological variability, Hustedt (1933) divided it into a number of sections, some members of which have been studied by Stephens & Gibson (1979, 1980a and Paddock & Kemp (1990). On the other hand, Aneumastus is a much smaller genus, created by Mann & Stickle (Round et al, 1990) for Navicula tuscula Ehrenberg and closely related species (Lange-Bertalot, 2001), sharing chloroplast type and some aspects of valve morphology with Mastogloia, but without loculate valvocopulae.…”

Section: Introductionmentioning

confidence: 99%

Achnanthes sensu strictobelongs with genera of the Mastogloiales rather than with other monoraphid diatoms (Bacillariophyta)

Cox

2006

European Journal of Phycology

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Despite variation in their protoplast organization and wall structure, monoraphid diatoms have traditionally been grouped as a single family or order, intermediate between the araphid and biraphid diatoms. However, the predominantly marine or brackish species of Achnanthes sensu stricto share protoplast and frustule features with representatives of the Mastogloiales rather than with other monoraphid diatoms. Meanwhile, studies of morphogenesis in Achnanthes have revealed that cells become monoraphid by filling in one raphe system during valve formation, indicating that the monoraphid condition is derived rather than primitive. Evidence from light and electron microscopy is presented to support the transfer of Achnanthes to the Mastogloiales, and an emended description of the order is given. It is concluded that the Achnanthales sensu Round et al. is a paraphyletic group and that the closest relatives of the various monoraphid genera must be sought among other raphid diatoms.

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Section: Introductionmentioning

confidence: 99%

Achnanthes sensu strictobelongs with genera of the Mastogloiales rather than with other monoraphid diatoms (Bacillariophyta)

Cox

2006

European Journal of Phycology

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“…5). In M. braunii, the siliceous flange is reduced to a thin intercalary band (sTePHens & Gibson 1980b). The two new species described in this study were found in an isolated desert lake, Sawa Lake, with a high salt content.…”

Section: Mastogloia Vestigiostriata Al-handal Et Pennesi Sp Nov (Semmentioning

confidence: 68%

“…3), whereas in M. vestigiostriata, the mantle is composed by rounded areolae arranged in transapical rows (Figs 4f, 5a). The longitudinal and irregular thickenings on the margin present in M. vestigiostriata (Figs 4a,5a) are missing from the valves of M. braunii (sTePHens & Gibson 1980b, fig. 4).…”

Section: Mastogloia Vestigiostriata Al-handal Et Pennesi Sp Nov (Semmentioning

confidence: 99%

Two new species of Mastogloia Thwaites ex W. Smith (Bacillariophyceae) from Sawa Lake, southern Iraq

Al-Handal¹,

Pennesi²,

Abdullah³

2015

Fottea

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Abstract:Two new species of the genus Mastogloia are described. Mastogloia sawensis sp. nov. and M. vestigiostriata sp. nov. were encountered as epiphytes on Chara sp. which covers the sediment of Sawa Lake, an isolated saline water body in southern Iraq. Mastogloia sawensis belongs to the section Lanceolatae and is closely similar to M. lanceolata but differs in raphe curvature, areolae shape and arrangement, and the presence of rounded pores at the junction of the partecta. Mastogloia vestigiostriata resembles under light microscopy to M. lyra and M. braunii but shows differences in several features including valve mantle structures, H-shaped lateral hyaline area, siliceous flanges and partectal formation. This study gives morphological details on the ultrastructure of the new species and provides a detailed comparison with all related taxa.

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“…All comparisons were based on other populations. Stephens & Gibson (1980) illustrated four valves of a presumable population of M. braunii from Florida whereas Navarro (1988) showed SEM illustrations of several valves from a population of Cabo Rojo, a municipality situated on the southwest coast of Puerto Rico. The Lac de Guiers population differs however from both published records in having a different stria structure on the mantle.…”

Section: Discussionmentioning

confidence: 99%

“…The Lac de Guiers population differs however from both published records in having a different stria structure on the mantle. The population in Stephens & Gibson (1980) presents uniseriate mantle striae with transapically elongated pseudoloculi whereas the Lac de Guiers population has typically biseriate striae on the mantle. Apart from the mantle striae, several other differences could be noted.…”

Section: Discussionmentioning

confidence: 99%

Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

Vijver

Fofana

Sow

et al. 2017

EJT

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Abstract. Two Mastogloia Thwaites ex W.Sm. taxa were found during a survey of the diatom flora of Lac de Guiers, Senegal. Based on all currently available literature, one taxon could be identified as M. belaensis M.Voigt, a species formerly described from Pakistan. The second species showed some resemblance to M. braunii Grunow. Analysis of the type of M. braunii revealed, however, important morphologic differences, leading to the description of a new species from the Senegal population: M. senegalensis Van de Vijver, Fofana, Sow & Ector sp. nov. The present paper describes this new species and discusses and illustrates the morphology of M. belaensis and the type of M. braunii. All taxa are discussed with morphologically similar taxa.

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Ultrastructural Studies on Some Mastogloia (Bacillariophyceae) Species Belonging to the Group Ellipticae

Cited by 19 publications

References 3 publications

Achnanthes sensu strictobelongs with genera of the Mastogloiales rather than with other monoraphid diatoms (Bacillariophyta)

Achnanthes sensu strictobelongs with genera of the Mastogloiales rather than with other monoraphid diatoms (Bacillariophyta)

Two new species of Mastogloia Thwaites ex W. Smith (Bacillariophyceae) from Sawa Lake, southern Iraq

Morphology of two Mastogloia species (Bacillariophyta) from Lac de Guiers (Senegal) and comparison with the type material of M. braunii

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