BIDDULPHIOID DIATOMS: RESTING SPORES IN ANTARCTIC EUCAMPIA AND ODONTELLA 1

• Published in: Journal of Phycology
• Main Authors: Hoban, Michael A., Fryxell, Greta A., Buck, Kurt R.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1980
• Subjects: Antarctic; Antarc*
• Online Access: http://dx.doi.org/10.1111/j.1529-8817.1980.tb03078.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1529-8817.1980.tb03078.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1529-8817.1980.tb03078.x

ABSTRACT Some antarctic diatoms form resting spores, differing morphologically and probably physiologically from vegetative cells. Differences in the type of resting stages became apparent while examining three species of endemic Antarctic diatoms (Bacillariophyceae, Centrales): Eucampia balaustium Castracane, Odontella weissflogii (Janisch) Grunow, and O. litigiosa (van Heurck) Hoban, comb. nov. Eucampia balaustium usually forms two resting spores per vegetative cell with apparently one residual body and rudimentary valve per resting spore. Odontella weissflogii produces one endogenous resting spore per vegetative cell with at least one, presumably two, residual bodies per resting spore. Through an indeterminate number of divisions, Odontella litigiosa produces a heavily spined morphotype that may function as a resting spore. Odontella litigiosa is transferred from the genus Biddulphia to Odontella C. A. Agardh. The resting spores of all three species have girdle bands. Since resting spores may evolve at different rates than vegetative cells, morphological similarities between the resting spores and the vegetative cells of species in this study and the vegetative cells of species in related families and genera may indicate taxonomic relationships and be of value in formulating phylogenetic schemes.