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Hecatonema streblonematoides (Setchell et Gardner) Loiseaux

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drawing of Hecatonema streblonematoides
epiphytic habit
Synonyms:
Comsponema streblonematoides Setchell et Gardner, C. pusillum Setchell et Gardner, C. speciosum f. piliferum Setchell et Gardner, C. nummuloides Setchell et Gardner, C. myrionematoides Setchell et Gardner, C. secundum Setchell et Gardner, C. ramulosum Setchell et Gardner, C. secundum f. terminale Setchell et Gardner, Hecatonema variabile Setchell et Gardner, H. clavatum Setchell et Gardner
Illustrations:
Abbott and Hollenberg 1976, p. 163, fig. 130 (plurilocular plant); Loiseaux 1970b, p. 252, figs. 2a–d (various plurilocular plants), p. 254, fig. 3 (cultured plants); Setchell and Gardner 1922b, pl. 35, fig. 4 (plurilocular plant), fig. 6 (plurilocular plant), pl. 36, fig. l (plurilocular plant), pl. 37, figs. 1, 2 (plurilocular plant), fig. 3 (plurilocular plant), fig. 4 (plurilocular plant), pl. 38, fig. 1 (plurilocular plant), fig. 2 (unilocular plant), pl. 39, figs. 1, 3, 4, 5 (plurilocular plant), pl. 41, figs. 1–12 (plurilocular and unilocular plants), pl. 40, figs. 1–3 (plurilocular plant) Display references
Pacific Coast Distribution:
Alaska (Loiseaux 1970b, p. 253); Moclips, Wash. (Setchell and Gardner 1922b, p. 357); Crescent City, Del Norte Co., Calif. (Dawson 1965a, p. 14) to Carmel Bay, Monterey Peninsula, Calif. (Setchell and Gardner 1922b, p. 356); Gulf of California (Puerto Peñasco, Sonora, México: Loiseaux 1970b, p. 253) Display references
Taxonomy:
Loiseaux 1970b, p. 253 Display references
Life History and Biology:
microscopic plants from nature with plurilocular organs bore zooids which did not fuse, but settled to grow into plants like their parents with plurilocular organs. Those kept at 15 C or 20 C failed to form unilocular organs, but those kept at 10 C or transferred from 15 C to 10 C produced unilocular organs Microscopic plants from nature with unilocular organs bore zoospores which did not fuse but settled and grew into microscopic branched filamentous systems of a Microsyphar stage with plurilocular organs. On rarer occasions a more robust plant was formed similar to Hecatonema forming unilocular and plurilocular organs as in nature. It would seem reasonable that these plants were formed from a fusion of a pair of zooids from the plurilocular organs of the Microsyphar stage (Loiseaux 1970b, p. 253) Display references

 
J F M A M J J A S O N D
BRITISH
COLUMBIA
Pl  x    x               Uncommon, on stipes and pneumatocysts of Nereocystis and on Costaria, in pools and in the low intertidal and subtidal. Loiseaux 1970b, p. 253. Hawkes et al. 1979, p. 93. Display references
U  x    x              
S    x                  
COLUMBIA
RIVER
Pl                        
U                        
S                        
CAPE
ARAGO
Pl            xx         Uncommon, epiphyte on pneumatocysts of Nereocystis in pools and in the low intertidal and subtidal. Dawson 1965a, p. 4. Display references
U                        
S                        
CAPE
MENDOCINO
Pl                        
U                        
S                        
POINT
ARENA
Pl  x    x  x           Abundant, epiphyte on pneumatocysts of Nereocystis and on Costaria, in pools and in the low intertidal and subtidal. Loiseaux 1970b, p. 253. Kjeldsen 1995, p. 22. Display references
U  x    x  x          
S xxxxxxxxxxxx
SAN
FRANCISCO
Pl x              xx  x Uncommon, epiphyte on pneumatocysts of Nereocystis, in pools and in the low intertidal and subtidal. Smith 1944, p. 109. Display references
U x              xx  x
S                        

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