|NIWA Guide to Polychaeta | Shore polychaetes | Pick shore group | Pick shore family | Shell polychaetes|
|Nereis ovarius|| Nereididae (nereidid/rag worm)
Phyllodocida (Annelida: Polychaeta)
|Nereis ovarius Read, 1980. Family Nereididae|
[Click photo for picture page]
|Habitat:||Intertidal. Subtidal. Rocky shore. Open beaches. Epifaunal. Depth range: 0-5 (m). Salinity regime: Marine only. Microhabitat: Low tide within holdfasts of turfing-habit small algae. Tube: Rough structure of debris and mucus.|
|Occurrence:|| Consistently occurring. Density: 50 (m2).
Distribution in NZ: Widespread in New Zealand
|Feeding guild:||Surface grazing-herbivore.|
|Diagnosis:||Genus Nereis in Family Nereididae.
A small species with few paragnaths, dorsally present as inconspicuous minute single cones on areas II and VI, ventrally a single row on VII-VIII, one conical on area III, a small diagonal group on IV. Tentacular cirri characteristically spindle-shaped, short. Posterior parapodia with notopodial ligule much reduced. From chaetiger 14 a single homogomph notopodial bidentate falciger is present. Colour: Pale greenish- or brownish-yellow anteriorly, paler posteriorly, with scattered white surface spots. Maturing females with conspicuous very large green oocytes. Maximum size: 20 mm total length, 1 mm body width.
|Notable aspect:||Small size, small paragnaths dorsally, spindle-shaped tentacular cirri.|
|Comparisons:||Nereis ovarius is easily distinguished from other New Zealand Nereis on paragnath pattern. N. falcaria has similar homogomph notopodial falcigers.|
|Taxonomy:||Distinct but belongs in the N. jacksoni group.|
|Distribution:||Endemic. NZ only.|
|Biology:||This endemic Nereis has a unique reproductive biology. It metamorphoses and spawns in spring. Heteronereids have a pseudocopulation in which the swimming male grasps the female with his tail. The female carries the fertilised eggs on her dorsal surface at first, before gluing them inside a shelter where she broods them. Larvae hatch after about 8 chaetigers have developed.|
|Best References:||Biology: Read (1980) A new species of Nereis (Polychaeta: Nereididae) from Wellington, New Zealand, rock shores.. Journal of the Royal Society of New Zealand 10:185-193 Taxonomy: No recommendation.|
|Synonyms, NZ records||Original figures||Original description details|
|Genus diagnosis||More pictures||Further references (biology, etc)||Family Nereididae|
|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 ||
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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 5/07/2004, and page last generated by G. Read, 27/07/2004 (dd/mm/yy)