Chaetomorphopsis pacifica Lyon

• Region

  Oceania

• Country

  United States of America

• State/Province

  Hawaii

• Locality

  Pahala, on reef at low tide

• Coordinates

  19.1591, -155.445

• Coordinate Uncertainty (m)

  6796

• Distribution

  Map all specimens of this taxon

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Josephine E. Tilden. American Algae.

Chaetomorphopsis H. L. Lyon. A new genus of Cladophoraceae.

Plants gregarious, filamentous ; upper coenocytes subcylindrical or ventri
cose; basal coenocyte greatly elongated, tapering downwards, sending
out from its lower portion branched, siphoneous rhizoids filled with
green endochrome; new filaments developing from buds which arise
upon the rhizoids ; membrane lamellate; reproduction by ovoid zoogo-
nidia with four cilia, escaping through several circular openings in
membrane of gonidangial coenocyte.

Plants resembling Chætomorpha and Urospora.

458. Chaetomorphopsis pacifica H. L. Lyon.

Filaments bright green, tufted, rigid, up to 5 cm. high ; upper coenocytes
at first cylindrical, becoming ventricose, 500-800 mic. in diameter, vary-
ing in length from a little shorter to two times longer than broad ; basal
coenocyte 4-8, sometimes 10 mic. long, 150-250 mic. broad at base;
zoogonidia averaging about 8-10 mic.

On reef at low tide.

Palíala, Hawaii, Territory of Hawaii.

J. E. T. 3 J1 1900.

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