Cladophoropsis macromeres W.R.Taylor 1928
Publication Details
Cladophoropsis macromeres W.R.Taylor 1928: 64, pl. 4: figs 15, 16
Published in: Taylor, W.R. (1928). The marine algae of Florida with special reference to the Dry Tortugas. Publications of the Carnegie Institution of Washington 379: [i-] v, [1]- 219, 3 figs, 37 pls, 7 tables.
Request PDFType Species
The type species (lectotype) of the genus Cladophoropsis is Cladophoropsis membranacea (Bang ex C.Agardh) Børgesen.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Type locality: "Abundant in the moat, Fort Jefferson, Dry Tortugas" [Garden Key, Florida, USA]; (Taylor 1928: 65) Holotype: Taylor 903; lying free on the soft mud of the moat bottom; MICH; (Leliaert & Coppejans 2006: 662) Notes: Paratype: same locality, leg. Taylor 1143, NY.
General Environment
This is a marine species.
Description
Thallus bright green, forming loose lying mats, up to 15 cm across and 2-10 (-15) cm thick, composed of loosely entangled, coarse filaments. Cell division by centripetal invagination of the cell walls. Growth mainly by apical cell division, followed by cell elongation and limited cell enlargement. The diameter of the thickest part of the main axes about 1-1.3 times that of apical cells. Newly formed cells producing one lateral at the apical pole. Laterals generally lacking basal cross walls (length/width [l/w] ratio of laterals in open connection with the mother cell up to 45). Ultimate branch systems unilateral to irregular. Branching limited to the first order. Angle of ramification 20º-55º. Structural reinforcement of the thallus limited, by loosely entangling of the filaments and occasionally by anastomosis of cells by tenacular cells (intermediate forms between type-3 tenacular cells and type-2 rhizoids), produced laterally or basally on the intercalary cells, 40-50 microns in diameter, 170-260 microns long; on average less than 1% of the cells forming a tenacular cell. Apical cells cylindrical, straight, or slightly curved or sinuous, (140-) 280-360 (-400) microns in diameter, up to 22 mm long, l/w up to 60. Lateral 220-300 microns in diameter, up to 5 mm long, l/w ratio up to 17. Main axes cylindrical, straight or slightly curved, 280-510 microns in diameter, 100-5500 microns long l/w ratio 2.3-18. Cell walls 2-4 microns thick in the ultimate branches; up to 10 microns thick in main axes. Chloroplasts polygonal or rounded, forming an open to dense parietal reticulum, 7-10 microns in diameter. Most chloroplasts with a single large pyrenoid, 3.8-6.4 microns in diameter. Prismatic calcium oxalate crystals present in most cells of the thallus, elongate rectangular or trapeziform to needle-shaped, numbers ranging from 1 to several per cell; crystals 1-14 microns broad, up to 150 microns long, l/w ratio 1.5-55 (Leliaert & Coppejans, 2006).
Created: 02 July 1998 by M.D. Guiry.
Last updated: 10 March 2023
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Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 10 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 20 April 2024
