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

Autor:	Laura Cox, Mark Nijland, Natalia Schlabritz-Loutsevitch
Rok vydání:	2006
Předmět:	religion.religious_order Paraphyly Frustule biology Mastogloiales Plant Science Aquatic Science biology.organism_classification religion Closest relatives Sensu Botany Achnanthales Sensu stricto Single family
Zdroj:	European Journal of Phycology. 41:67-81
ISSN:	1469-4433 0967-0262
DOI:	10.1080/09670260500491543
Popis:	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.
Databáze:	OpenAIRE
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