|NIWA Guide to Polychaeta | Shore polychaetes | Pick shore group | Pick shore family | Shell polychaetes|
|Euzonus otagoensis|| Opheliidae (opheliid)
Scolecida (Annelida: Polychaeta)
|Euzonus otagoensis Probert, 1976. Family Opheliidae|
Euzonus otagoensis lateral views|
[Click photo for picture page]
|Habitat:||Intertidal. Soft shore. Sheltered to open beaches. Fine clean sand Infaunal. Depth range: 0 (m). Salinity regime: Marine only. Microhabitat: Mid-tide level, with surface sign of presence not observed. Tube: No tube. Burrows freely.|
|Occurrence:|| Uncommon but may have localised colonies. Density: 700 (m2).
Distribution in NZ: Rarely reported, but may be widespread. Known from Otago, Northland, and Wellington.
|Feeding guild:||Subsurface deposit-feeding/herbivore.|
|Diagnosis:||Genus Euzonus in Family Opheliidae.
Always 38 chaetigers, the anterior 14 abranchiate, then 18 with paired branchiae, then at posterior 6 without branchiae . Head abruptly tapered to small point. Prostomial eyespots absent, lateral eyespots absent. A slight constriction between chaetiger 2 and three (genus character). Glandular ridge present on chaetiger 10, with a small ridge on chaetiger 11. Midventral ridge present in branchial region. Pygidium with a stout ventral cirrus, and lateral cirri numbering about 6-9 each side. All chaetae are unornamented capillaries. Colour: Red or pink in life. Maximum size: 35 mm total length, 2.5 mm body width, for 38 chaetigers.
|Notable aspect:||Bifurcate branchiae. Constant total number of chaetigers - no variation reported from a large number of specimens examined.|
|Comparisons:||Armandia maculata, a slender, more streamlined opheliid species, has other easily-seen differences in that the branchiae are single (NOT paired) on each segment, and eyespots ARE present.|
|Taxonomy:||Distinct in genus for 14 abranchiate chaetigers and for presence of 2nd glandular ridge on chaetiger 11.|
|Distribution:||Endemic. Unreported elsewhere.|
|Biology:||Has been found on open coast beaches that have some shelter. Is not known from either exposed surf beaches or sheltered harbours.|
|Best References:||Biology: Probert (1976) New species of Euzonus (Polychaeta: Opheliidae) from a New Zealand sandy beach. New Zealand Journal of Marine and Freshwater Research 10:375-379 Taxonomy: Santos, Nonato, and Petersen (2004) Two new species of Opheliidae (Annelida: Polychaeta): Euzonus papillatus sp. n. from a northeastern Brazilian sandy beach and Euzonus mammillatus sp. n. from the continental shelf of southeastern Brazil. Zootaxa 478:1-12.|
|Synonyms, NZ records||Original figures||Original description details|
|Genus diagnosis||More pictures||Further references (biology, etc)||Family Opheliidae|
|GOOGLE Search | AlltheWeb Search | CISTI | CBIF BiOSC Gateway | GOBASE Molecular | GenBank | Genus only in GenBank ||
|Genus only in Ubio Taxonomic Name Server | PubMed | Scirus | Zoological Record ||
Note: use the Back button of your browser to return to Shore Polychaete Guide.
The information provided by this page and by the pages of the "more information" links is held in a structured form for rapid and frequent updating and improvement. Descriptive text is compiled from a number of database fields, some of which may occasionally be empty. |
Data last edited 10/09/2004, and page last generated by G. Read, 11/09/2004 (dd/mm/yy)