Beitrag
Studies on Chitinophilic Siphonaria, Diplophlyctis, and Rhizoclosmatium, Chytridiales. I. Siphonaria variabilis H. E. Petersen emend. with emphasis on sexuality
Dogma, Irineo J. jr.
Nova Hedwigia Band 25 Heft 1-2 (1974), p. 107 - 119
16 Literaturangaben
veröffentlicht: Sep 30, 1974
DOI: 10.1127/nova.hedwigia/25/1974/107
ArtNo. ESP050002501004, Preis: 29.00 €
Abstract
The morphology and development of Siphonaria variabilis H. E. Petersen, a monocentric, eucarpic chytridiomycete occurring on insect exuviae in aquatic habitat, were studied based on four single-spore, pure culture isolates. Development of the zoosporangial thalli is of the Chytridium-type and these are without an apophysis. The sexual process proved to be more elaborate than was heretofore believed for the species. This is highly suggestive of the scalariform-type of sexual conjugation in the Zygnematales (Conjugales) of the Chlorophyta, and Zygomycetes of the higher Phycomycetes. The resting spore itself is a zygotic thallus intercalated between and developed from the anastomosed rhizoidal elements of two gametangial thalli which are morphologically and developmentally indistinguishable from one another and from zoo sporangial thalli of the same age. Based on the findings, the description of S. variabilis is emended.
Schlagworte
thalli • apophysis • species • insect exuviae • zygotic thallus