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Sphaerotrichia divaricata (C. Agardh) Kylin

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drawing of Sphaerotrichia divaricata
Synonyms:
Chordaria dissessa Setchell et Gardner, Sphaerotrichia dissessa (Setchell et Gardner) A. Zinova
Illustrations:
Sporophyte: Setchell and Gardner 1925, pl. 41, fig. 57 (x-section, unilocular organs), pl. 75, (photo: habit); Peters et al. 1987, p. 462, figs. 1 (photo: habit), fig. 2 (photo: section, unilocular sporangia). Gametophytes: Peters et al. 1987, p. 460, figs. 5, 6 (photos: gametangia), p. 462, figs. 7–12 (photos: sexual reproduction) Display references
Pacific Coast Distribution:
Bamfield Inlet and Grappler Inlet, Vancouver I. British Columbia (Peters et al. 1987, p. 458); Washington (Seal Rock, Hood Canal, Mason Co.: R. Norris and Wynne 1969, p. 137; Orcas I.: Setchell and Gardner 1925, p. 574) Display references
Taxonomy:
Zinova 1958 Display references
Life History:
Field plants with unilocular organs released zooids which grew into microscopic thalli. These plants developed in two ways: 1) dioecious gametophytes, which released gametes which fused and produced plants similar to field plants, or 2) plants which recycled directly without sex. At higher temperatures or short days all microthalli recycled directly via zooids (Novaczek and McLachlan 1987; Peters et al. 1987; Peters and Müller 1986a; Ajisaka and Umezaki 1978) Display references
Chromosomes:
Peters et al. 1987 Display references

 
J F M A M J J A S O N D
BRITISH
COLUMBIA
Pl                         Rare, on Zostera, and on sandy substrate subtidal 30–40 ft. Setchell and Gardner 1925, p. 574. Scagel 1957, p. 79. R. Norris and Wynne 1969, p. 137. Peters and Müller 1986a, p. 69. Display references
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COLUMBIA
RIVER
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CAPE
ARAGO
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CAPE
MENDOCINO
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POINT
ARENA
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SAN
FRANCISCO
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Page dated: Mon Feb 13 21:24:26 2006
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