Rexia erecta Casamatta, Gomez & J.R.Johansen 2006
Publication Details
Rexia erecta Casamatta, Gomez & J.R.Johansen 2006: 23
Published in: Casamatta, D.A., Gomez, S.R. & Johansen J.R. (2006). Rexia erecta gen. et sp. nov. and Capsosira lowei sp. nov., two newly described cyanobacterial taxa from the Great Smoky Mountains National Park (USA). Hydrobiologia 561: 13-26.
Request PDFType Species
This is the type species (holotype) of the genus Rexia.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Type locality: Cataloochie Road, Great Smoky Mountains National Park, Haywood County, North Carolina, USA; (Casamatta, Gomez & Johansen 2006: 25) Holotype: 6 May 2002; Wet rock face facing north northwest in water of pH 5.0.; BRY; C 37677 (Casamatta, Gomez & Johansen 2006: 25) Notes: Reference strain designation CAT4-SG4: UTEX Culture Collection, University of Texas, Austin, Texas, USA.
Origin of Species Name
Adjective (Latin), erect (Stearn 1973).
Description
Filaments erect from substrate, profusely false
branched, producing numerous Hormogonia,
which arise from separation of short branches, mostly with a single trichome per filament
but in culture occasionally with multiple short
trichomes per filament, 8–16 µm wide. Trichomes
typically constricted at the crosswalls, infrequently
not appearing constricted, often tightly bent and entangled, tapering toward ends, but never to a
hair, isopolar in growth habit, sometimes with an
apical cap of one to many necridial cells,
5–11 µm wide. Cells bright blue–green, often with
large granules, 2.5–8 µm long. Hormogonia a few
cells long, capable of undergoing division
in two planes, although such division pattern
is rare. Heterocytes intercalary, very rare,
always with a single polar nodule,
8–10 µm wide, 5–9 µm long.
Created: 09 February 2011 by M.D. Guiry.
Last updated: 14 December 2017
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=138703
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 14 December 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 29 April 2024
