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Sphacelaria rigidula Kützing

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drawing of Sphacelaria rigidula
after Prud'homme van Reine 1982 and Setchell and Gardner 1924a and 1925
Synonyms:
Sphacelaria subfusca Setchell et Gardner, S. furcigera Kützing
Illustrations:
Abbott and Hollenberg 1976, p. 219, fig. 181 (branching pattern); Kitayama 1994, p. 73, fig. 22 (photos: habit in nature), p. 80, fig. 28 (photos: unilocular and plurilocular sporangia), p. 82, fig. 29 (photos: unilocular sporangia), p. 78, fig. 26 (photos: propagules); Prud'homme van Reine 1982, p. 204, figs. 508–510 (habit), fig. 517 (branching detail), p. 207, figs. 538–540 (unilocular organs), figs. 541–544 (plurilocular organs); Setchell and Gardner 1924a, pl. 19, fig. 58 (branch with male and female gametangia); Setchell and Gardner 1925, pl. 37, fig. 28 (branching pattern), fig. 29 (branching pattern) Display references
Pacific Coast Distribution:
Prince William Sound, Alaska (Johansen 1971b, p. 66) to Luffenholtz Beach, Humboldt Co., Calif. (Dawson 1965a, p. 13); Carmel Bay, Monterey Co., Calif. (Abbott and Hollenberg 1976, p. 218); Channel Is., Calif. (Anacapa I.: Dawson and Neushul 1966, p. 174; Santa Catalina I.: Nicholson and Cimberg 1971, p. 377); Los Angeles Co., Calif. (Redondo Beach: Setchell and Gardner 1925, p. 396; San Pedro: Abbott and Hollenberg 1976, p. 218); Laguna Beach, Orange Co., Calif. (Abbott and Hollenberg 1976, p. 218); Isla Guadalupe, Baja Calif. (Dawson 1953b, p. 112); to Galápagos Is. (Dawson 1957a, p. 3); Gulf of California (Isla Tiburón to La Paz: Dawson 1953b, p. 112) Display references
Taxonomy:
Kitayama 1994; Prud'homme van Reine 1982, p. 20 Display references
Molecular Taxonomy:
Tan and Druehl 1994; Tan and Druehl 1993 Display references
Life History:
Propagules were produced in culture in temperatures greater than 12C. Meiosis took place in the unilocular organs with half the plants becoming male gametophytes and the other half female gametophytes. Anisogamous gametangia were produced at 4 C, 12 C, and 17 C in long days only. The gametes fused, or females can develop parthenogenetically (Colijn and van den Hoek 1971; van den Hoek and Flinterman 1968) Display references
Phenology:
In Europe both plurilocular and unilocular plants are known, whereas Pacific plants are only unilocular in the north, and sterile, with propagules, or with plurilocular organs in the south
Chromosomes:
van den Hoek and Flinterman 1968 Display references
Biology/Ecology:
Aguilar Rosas and Machado Galindo 1990, p. 188; Stewart 1982, p. 48; Dworetzky et al. 1980 Display references
Ultrastructure:
Katsaros et al. 1994 Display references
Physiology:
ten Hoopen et al. 1983 Display references

 
J F M A M J J A S O N D
BRITISH
COLUMBIA
Pl                         Uncommon, in sand, on rocks, and epiphytic on Codium fragile in moderately exposed to moderately sheltered habitats in the upper subtidal. Scagel 1957, p. 74. Scagel 1973, p. 135. Lewis 1982, p. 18. Display references
U x        xx      x  
S    xxxxxxxx    
COLUMBIA
RIVER
Pl                         Rare, in sand, on rocks, semi-exposed in the low intertidal. Markham and Celestino 1977, p. 259. Display references
U                        
S          x            
CAPE
ARAGO
Pl                         Uncommon, amongst turf algae, mid and low intertidal. Dawson 1965a, p. 13. Display references
U                        
S            x          
CAPE
MENDOCINO
Pl                        
U                        
S                        
POINT
ARENA
Pl                        
U                        
S                        
SAN
FRANCISCO
Pl                         Rare, on rocks or algae in the low intertidal and upper subtidal in sheltered habitats. Silva 1979, p. 336. Josselyn and West 1985, p. 143. Display references
U                        
S          x          x

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Page dated: Mon Feb 13 21:24:26 2006
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