Stylochus sp. are generally oval in shape, with greatly flattened
bodies. Color is tan to darker brown. They are common inhabitants of
oyster reefs and reach 2.5 - 3.2 cm (approximately 1 inch) in length.
Other Taxonomic Groupings:
II. HABITAT AND
Extent of range is undetermined.
Stylochus sp. is found throughout the Indian
River Lagoon, and is most abundant in areas where oysters occur.
III. LIFE HISTORY AND POPULATION BIOLOGY
Age, Size, Lifespan:
Typical and maximum adult sizes of Stylochus sp. are 25 x 12mm and 32 x
15 mm respectively.
Adult Stylochus sp. are considered common in empty oyster shells from
Lake Worth to West Palm Beach.
Stylochus sp. is a simultaneous hermaphrodite.
Egg masses of Stylochus sp. are laid inside empty oyster shell and hatch
as Götte's larvae.
IV. PHYSICAL TOLERANCES
V. COMMUNITY ECOLOGY
Stylochus sp. preys on oysters, barnacles and planktonic larvae.
Preferred substratum for Stylochus sp. is oyster reef.
VI. SPECIAL STATUS
Notes on Endemism:
The invasion status of Stylochus sp. is unknown but its larvae have been
found in bilge water.
Stylochus sp. can be considered to have an adverse economic impact in the
Indian River Lagoon because it preys on oysters.
Report by: J. Dineen,
Smithsonian Marine Station
with thanks to L. Newman
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Page last updated: July 25, 2001