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Description:
Colonies of Victorella pavida develop as chains
of zooids
connected by a stolon that arises from the bases of new
zooids. In young colonies, overall colony structure is quite simple; however, as they develop, zooids elongate and bud off new stolons and zooids to
form extensive, branching networks. Individual zooids are tiny and cylindrical, measuring
approximately 0.007 X 0.02 inches. In older colonies, zooids can measure as much as
0.1 inch. The horseshoe-shaped lophophore surrounding the mouth averages 0.01 inches diameter and bears 8
tentacles.
Habitat:
Typical habitats for bryozoans in the Indian River
Lagoon include seagrasses, mangrove roots, drift algae, oyster reef, docks,
pilings, breakwaters, and man-made debris. Within the Indian River
Lagoon, V. pavida was collected only
from seagrass beds around Link Port.
Similar Species:
Colonies of Victorella pavida resemble those of the
genus Bowerbankia. These groups are differentiated based on differences
in growth from the stolon. In Bowerbankia, new zooids are budded
separately from the stolon; in V. pavida, the stolon arises from
the base of zooids.
Range:
Victorella pavida is a cosmopolitan species whose
range in the western Atlantic extends from Chesapeake Bay to Brazil.
This species had
not been documented in the Indian River Lagoon prior to 1982. Since then, it has
been collected sporadically from Link Port in Ft. Pierce, and along the
coast near inlets.
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Growth pattern of Victorella pavida
showing stolon arising from zooid bases. Drawing by J. Winston,
courtesy of American Museum of Natural History. Used with permission.
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Bryozoan colonies located in 3 square feet of seagrass bed could
potentially filter and recirculate an average of 48,000 gallons of seawater per
day.
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