Auxospore wall structure and postsexual valve morphology
in Rhabdonema minutum Kützing
1
Biology Department, Mount Allison University, 63B York Street,
Sackville, New Brunswick, E4L 1G7, Canada
2
Digital Microscopy Facility, Mount Allison University, 63B York
Street, Sackville, New Brunswick, E4L 1G7, Canada
Publication date: 2019-07-18
Plant and Fungal Systematics 2019; 64(1): 33-39
KEYWORDS
auxosporulationaraphid pennate diatomincunabular scaleslongitudinal perizonial bandsperizoniumevolution of raphe
ABSTRACT
Several decades ago, three members of the araphid pennate genus Rhabdonema
(R. adriaticum, R. arcuatum, R. minutum) were the first araphid diatoms studied using
cultures and electron microscopical methods to determine auxospore structure and development.
Of these, R. minutum was the least documented at that time. None have been
reinvestigated until now. Here we present the structural elements of the mature auxospore
and the initial and postsexual valve characteristics of R. minutum. Although in general the
auxospore wall of this diatom is similar to that of the two other species examined (to the
extent that they were documented), there are intriguing differences. Most unanticipated is
the structure of the primary band of the longitudinal perizonium, which shows remarkable
similarities to the raphid pennate diatom valve. The evolutionary implications of such
a similarity are considered.
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CITATIONS (3):
1.
Enlarge or die! An auxospore perspective on diatom diversification
Irena Kaczmarska, James Ehrman
Organisms Diversity & Evolution
Irena Kaczmarska, James Ehrman
Organisms Diversity & Evolution
2.
Auxospore fine structure and development in the surirelloid diatom Campylodiscus cf. neofastuosus (Bacillariophyta)
Masahiko Idei, David G. Mann, Tsuyoshi Watanabe, Shinya Sato
Journal of Phycology
Masahiko Idei, David G. Mann, Tsuyoshi Watanabe, Shinya Sato
Journal of Phycology
3.
Fine structure of the vegetative frustule, auxospore, and initial cell of
Licmophora gracilis
(Bacillariophyta) from Potter Cove (25 de Mayo/King George I., Antarctica)
Camilo Vélez-Agudelo, Carolina Matula, Patricio Bus Leone, Gabriela L. Campana, Rubén A. Lameiro, Marcela Espinosa, Adrián O. Cefarelli
Diatom Research
Camilo Vélez-Agudelo, Carolina Matula, Patricio Bus Leone, Gabriela L. Campana, Rubén A. Lameiro, Marcela Espinosa, Adrián O. Cefarelli
Diatom Research
| eISSN: | 2657-5000 |
| ISSN: | 2544-7459 |
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