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You are here:   animal list > Reteterebella queenslandia

 

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Reteterebella queenslandia Hartman 1863

Spaghetti worm




Lachlan Gleeson (2011)

 

 

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Overview

Brief Summary


Comprehensive Description


Physical Description

Size and Defining Characteristics


Identification


Ecology

Distribution and Habitats


Micro-habitats and Associations


Crypsis


Life History & Behaviour

Behaviour


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Evolution & Systematics

Phylogenetics


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Morphology and Physiology

External Morphology


Internal Anatomy


Cell Biology


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Content Summary

External Morphology

Reteterebella queenslandia is a small (<100mm) sedentary polychaete (Hartman, 1963). It is typically dull blue/grey in colour with hundreds of white highly muscularised buccal tentacles extending from the anterior end. The tentacles form a ring around the pharynx and contain a dark circle at the tip, which is used for photoreception. The tentacles also have a ciliated grove down the middle, which is used to pass food to the polychaetes mouth and collect sediment to build tubes out of (Mathe and Barrett, 1993). The mouth is located in the centre of the oral/aboral axis (axial feeders). The mouth and pharynx is highly muscularised but lacks teeth or a visible proboscis. The primary function of the mouth is to coat particles of sand in mucus and sort them either as food particles (small particles) or tube building blocks (medium sized particles).

As well as photoreceptors, the buucal tentacles possess mechanoreceptors and possibly chemoreceptor for feeding. The body is cone shaped,with setae and chetae being heavily reduced anteriorly and absent posteriorly. R. queenslandia also have three pairs of extensively branched branchial trees that extend anteriorly. R queenslandia relies extensively on mucus production both for protection (in building its protective tube) and for feeding (Mathers and Bennett, 1993). 

Close up of external Branchial structures of R. queenslandia
 
 

Whole specimen showing buccal tentacle mass, partially retracted, reduced setae and branchial structures in green.


Close up of a buccal tentacle showing the photoreceptive tip.
 
Coiled buccal tentacle with cilliated groove that runs the length of the tentacle.

Classification

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Kingdom
Animalia
Phylum
Annelida
Class
Polychaeta
Order
Terebellida
Family
Terebellidae
Genus
Reteterebella

Synonyms

Reterebella queenslandia ([auctt.])

Common Names

カワリフサゴカイ