Hildenbrandiales

Last updated

Hildenbrandiales
Hildenbrandia rivularis 02 by-dpc.jpg
Hildenbrandia rivularis
Scientific classification OOjs UI icon edit-ltr.svg
Clade: Archaeplastida
Division: Rhodophyta
Class: Florideophyceae
Subclass: Hildenbrandiophycidae
G.W.Saunders & Hommersand
Order: Hildenbrandiales
Pueschel & Cole, 1982
Family: Hildenbrandiaceae
Rabenhorst, 1868
Genera [1]

Hildenbrandiales is an order of crustose forms red alga which bear conceptacles [2] and produce secondary pit-connections. [3] They reproduce by vegetative gemmae [4] 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. [2] Some members of the order are known from freshwater rivers as well. [5]

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. [1]

References

  1. 1 2 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.
  2. 1 2 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.
  3. ↑ Pueschel, C. (1988). "Secondary pit connections in Hildenbrandia (Rhodophyta, Hildenbrandiales)". European Journal of Phycology. 23: 25–51. doi: 10.1080/00071618800650031 .
  4. ↑ 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 (inactive 5 July 2025).{{cite journal}}: CS1 maint: DOI inactive as of July 2025 (link)
  5. ↑ Khan, M. (1974). "On a fresh water Hildenbrandia Nardo. From India". Hydrobiologia. 44 (2–3): 237–240. doi:10.1007/BF00187272.


This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.