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Toward a multigene phylogeny of the Cymatosiraceae (Bacillariophyta, Mediophyceae) II: morphological and molecular insights into the taxonomy of the forgotten species Campylosira africana and of Extubocellulus , with a description of two new taxa
Author(s) -
Dąbek Przemysław,
Ashworth Matt P.,
Górecka Ewa,
Krzywda Marta,
Bornman Thomas G.,
Sato Shinya,
Witkowski Andrzej
Publication year - 2019
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/jpy.12831
Subject(s) - biology , taxonomy (biology) , phylogenetics , biogeography , evolutionary biology , zoology , botany , ecology , gene , genetics
New molecular and morphological insights are presented on Campylosira africana and two new species, Extubocellulus cupola sp. nov. and Plagiogrammopsis castigatus sp. nov. Species descriptions were based on LM / SEM micrographs and a data set with concatenated sequences of SSU , rbc L and psb C loci constructed from 56 cymatosiroid strains isolated from global geographic locations. Extubocellulus cupola is distinguished by a mesh‐like marginal ridge and dome‐shaped areolation, and P. castigatus , by a prominent marginal extension at the valve center. Campylosira africana , a species from South Africa described by Professor Malcolm Giffen, has never been documented through LM or SEM , which led some authors to place it in synonymy under Campylosira cymbelliformis . We confirm that C. africana is a distinct species and provide microphotographic documentation and DNA sequences. We present morphological evidence for the well‐known cymatosiroid species Extubocellulus spinifer possessing complete pili, and we emend the generic description of Extubocellulus .