Invasion History
First Non-native North American Tidal Record:First Non-native West Coast Tidal Record:
First Non-native East/Gulf Coast Tidal Record:
General Invasion History:
None
North American Invasion History:
Description
Encrusting bryozoan forming extensive white or pinkish one- or two layered sheets over rocks, docks, seaweed holdfasts, shells, etc. (West Coast colonies are reddish-orange to brown) Zooids rectangular or polygonal, convex, separated by deep grooves, typically 400-700 X 300-500 um. Primary orifice wider than long, with a deep V-shaped sinus occupying about 1/2 of its total width. Tiny teeth (condyles) at proximal inner corners of orifice. Frontal shield finely granular, densely perforated by small, round pores, and developing a stout, conical mound below the sinus. Avicularia single or paired, located beside the orifice. Polyp with 21-24 tentacles. Ovicells rest on the next (distal zooid), and are prominent, longer than wide, with an arched aperture, and grooves radiating around the center. Ancestrula oval with glassy frontal shield and 8 spines around orifice (Powell 1970; Hayward and Ryland 1999). Descripton Locations- Britsh Columbia, England.
Taxonomy
Taxonomic Tree
Kingdom: | Animalia | |
Phylum: | Bryozoa | |
Class: | Gymnolaemata | |
Order: | Cheilostomata | |
Suborder: | Ascophora | |
Family: | Schizoporellidae | |
Genus: | Schizoporella | |
Species: | unicornis |
Synonyms
Schizoporella "unicornis" (sensu Powell, 1971)
Potentially Misidentified Species
None
Schizoporella floridana
None
Schizoporella variabilis
None
Ecology
Food:
Phytoplankton
Trophic Status:
Suspension Feeder
SusFedHabitats
General Habitat | Coarse Woody Debris | None |
General Habitat | Oyster Reef | None |
General Habitat | Marinas & Docks | None |
General Habitat | Rocky | None |
General Habitat | Coral reef | None |
General Habitat | Vessel Hull | None |
Salinity Range | Polyhaline | 18-30 PSU |
Salinity Range | Euhaline | 30-40 PSU |
Tidal Range | Subtidal | None |
Vertical Habitat | Epibenthic | None |
Tolerances and Life History Parameters
Broad Temperature Range | None | Cold temperate-Warm temperate |
Broad Salinity Range | None | Polyhaline-Euhaline |
General Impacts
Regional Distribution Map
Bioregion | Region Name | Year | Invasion Status | Population Status |
---|---|---|---|---|
NWP-4a | None | 0 | Crypogenic | Established |
NWP-3a | None | 0 | Crypogenic | Established |
NWP-2 | None | 0 | Crypogenic | Established |
SP-XXI | None | 1935 | Crypogenic | Established |
AUS-VIII | None | 0 | Non-native | Established |
AUS-X | None | 1953 | Non-native | Established |
AUS-VII | None | 1975 | Non-native | Established |
AUS-IV | None | 1953 | Non-native | Established |
AUS-XII | None | 1975 | Non-native | Established |
AUS-XIII | None | 1925 | Non-native | Established |
AUS-V | None | 0 | Non-native | Established |
NEA-II | None | 0 | Native | Established |
NEA-III | None | 0 | Native | Established |
AR-V | None | 0 | Native | Established |
NEA-IV | None | 0 | Native | Established |
NEA-V | None | 0 | Native | Established |
WA-I | None | 0 | Native | Established |
MED-I | None | 0 | Native | Established |
MED-II | None | 0 | Native | Established |
MED-VII | None | 0 | Native | Established |
Occurrence Map
OCC_ID | Author | Year | Date | Locality | Status | Latitude | Longitude |
---|
References
Carlton, James T. (1979) History, biogeography, and ecology of the introduced marine and estuarine invertebrates of the Pacific Coast of North America., Ph.D. dissertation, University of California, Davis. Pp. 1-904Cohen, Andrew N.; Carlton, James T. (1995) Nonindigenous aquatic species in a United States estuary: a case study of the biological invasions of the San Francisco Bay and Delta, U.S. Fish and Wildlife Service and National Sea Grant College Program (Connecticut Sea Grant), Washington DC, Silver Spring MD.. Pp. <missing location>
Powell, N.A. (1970) Schizoporella unicornis - an alien bryozoan introduced into the Strait of Georgia., Journal of the Fisheries Research Board of Canada 27: 1847-1853
Tompsett, Scott; Porter, Joanne S.; Taylor, Paul D. (2009) Taxonomy of the fouling cheilostome bryozoans Schizoporella unicornis (Johnston) and Schizoporella errata (Waters), Journal of Natural History 43(35-36): 2227-2243