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Name derivation: |
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Hildenbrandia = Named for Professor F. E. Hildenbrandt of Vienna, an Austrian physician and naturalist rubra (L.) = red Common name = rusty rock) |
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Classification:
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Cruoria Fries, 1835; There are currently
28 species of which 5 have been taxonomically accepted.
Order Gigartinales; Family Cruoriaceae |
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Morphology: |
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Crusts thin (80-240 µm thick) and firmly attached; also non-calcified, fleshy, smooth, and pale orange in sun to bright red in the shade. Its basal layer consists of irregularly radiating branched filaments, which forms compact laterally connected rows that are mostly simple. Tetrasporic conceptacles common, subspherical, scattered, and with a single pore. Tetrasporangia elongate and with obliquely to irregularly cruciate divisions.
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Similar genera: |
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Habitat: |
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Found in subtropical to tropical streams. May be epibiontic. One recent find in Lake Huron at 21 m depth.
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References: |
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Fries, E.M. 1835. Corpus florarum provincialium Sueciae. I. Floram scanicam. pp. 1-192. Upsaliae [Uppsala]: Typis Palmbead, Serell & C Guiry, M.D. and G.M. Guiry 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 19 September 2013. Wehr, J.D. and R.G. Sheath 2003. Freshwater Algae of North America -- Ecology and Classification. Academic Press (imprint of Elsevier).
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