Hildenbrandiales | |
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Hildenbrandia rivularis | |
Scientific classification | |
Clade: | Archaeplastida |
Division: | Rhodophyta |
Class: | Florideophyceae |
Subclass: | Hildenbrandiophycidae G.W.Saunders & Hommersand |
Order: | Hildenbrandiales Pueschel & Cole, 1982 |
Family: | Hildenbrandiaceae Rabenhorst, 1868 |
Genera | |
Hildenbrandiales is an order of crustose forms red alga which bear conceptacles and produce secondary pit-connections. They reproduce by vegetative gemmae as well as tetrasporangia, which are produced inside the conceptacles. The way in which the tetraspores are produced is unusual enough to justify the formation of this distinct order. Some members of the order are known from freshwater rivers as well.
Systematics
Hildenbradiales are difficult to discriminate on morphological grounds; tetrasporangia morphology is the only vaguely reliable character, but molecular techniques have indicated a monophyletic Apophlaea within a paraphyletic Hildenbrandia, with many Hildenbrandia species being recognized as non-monophyletic.
References
- ^ Sherwood, A. R.; Sheath, R. G. (2003). "Systematics of the Hildenbrandiales (Rhodophyta): Gene Sequence and Morphometric Analyses of Global Collections". Journal of Phycology. 39 (2): 409–422. doi:10.1046/j.1529-8817.2003.01050.x.
- ^ Pueschel, C. (1982). "Ultrastructural observations of tetrasporangia and conceptacles in Hildenbrandia (Rhodophyta: Hildenbrandiales)". European Journal of Phycology. 17 (3): 333–341. doi:10.1080/00071618200650331.
- Pueschel, C. (1988). "Secondary pit connections in Hildenbrandia (Rhodophyta, Hildenbrandiales)". European Journal of Phycology. 23: 25–51. doi:10.1080/00071618800650031.
- Sherwood, A. R.; Sheath, R. G. (2000). "Microscopic analysis and seasonality of gemma production in the freshwater red alga Hildenbrandia angolensis (Hildenbrandiales, Rhodophyta)". Phycological Research. 48 (4): 241. doi:10.1111/j.1440-1835.2000.tb00220.x.
- Khan, M. (1974). "On a fresh water Hildenbrandia Nardo. From India". Hydrobiologia. 44 (2–3): 237–240. doi:10.1007/BF00187272.
Taxon identifiers | |
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Hildenbrandiales |
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Hildenbrandiophycidae | |
Hildenbrandiaceae |
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