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Species Name:    Amphiporus ochraceous
Common Name:                          (None)

 

I.  TAXONOMY

Kingdom Phylum/Division: Class: Order: Family: Genus:
Animalia Nemertea  Enopla Hoplonemertea  Amphiporidae Amphiporus



Species Name: 
Amphiporus ochraceous

 

Common Name:
None

 


Species Description:

Amphiporus ochraceous
is a tan or yellowish ribbon worm which attains an adult size of approximately 2.5 cm (1 inch).  It is similar to A. cruentatus, but lacks the prominent red blood vessels of that species. The head region of A. ochraceous has 2 rows of eyespots, with the largest eyes in the first row.  Species of this genus have a dorsal transverse groove behind the eyes, with 2 ventral grooves behind the first pair of eyes.  

Potentially Misidentified Species:
Can be confused with A. cruentatus, the blood nemertean, a similar but larger species that reaches 10 cm (4 inches) in length as an adult.


II.  HABITAT AND DISTRIBUTION 

IRL Distribution:
A. ochraceous is distributed throughout the Indian River Lagoon.


III. LIFE HISTORY AND POPULATION BIOLOGY

Age, Size, Lifespan:
Typical adult size of Amphiporus ochraceous is 20 - 40 mm. Maturation in this species probably occurs at 6 mos.

Abundance:
Adults of Amphiporus ochraceous are considered common in the Indian River Lagoon.

Reproduction:
Amphiporus ochraceous is a gonochoristic species with external outcross fertilization. Duration of reproductive seasonality is probably 2 months, with one reproductive event per year.


IV.  PHYSICAL TOLERANCES


V.  COMMUNITY ECOLOGY

Trophic Mode:
Larvae of Amphiporus ochraceous are lecithotrophic, while predatory adults consume crustaceans.

Habitat:
Members of this genus prefer fouling communities, like those on floating docks, and habitats under rocks on sandy and gravel substrata from the intertidal zone to approximately 130 m in depth.


VI. SPECIAL STATUS

Special Status:
None

Notes on Endemism:
Probably Native

Economic Importance:
None

 

Report by:  J. Dineen, Smithsonian Marine Station
with thanks to L. Newman
Submit additional information, photos or comments to:
irl_webmaster@si.edu
Page last updated: July 25,  2001