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You are here:   animal list > Culcita novaeguineae

 

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Culcita novaeguineae Müller & Troschel, 1842

Pin Cushion Seastar




Emily Searle (2011)

 

 

Fact Sheet

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Overview

Brief Summary


Distribution


Physical Description

Size


Ecology

Local Distribution and Habitats


Biogeographical Distribution


Micro-habitats and Associations


Crypsis


Life History & Behaviour

Behaviour


Feeding Behaviour


Life History


Evolution & Systematics

Fossil History


Systematics or Phylogenetics


Morphology and Physiology

External Morphology


Internal Anatomy


Conservation

Threats


Wikipedia


References

Bibliographies


Names & Taxonomy

Synonyms


Common Names

Internal Anatomy

Culcita novaeguineae, like all echinoderms, has a water vascular system (WVS) which is essentially a network of fluid filled canals (Hickman et al. 2008). These canals are lined with cilia which creates internal counter currents.  This system is utilised in respiration and internal transport.  The WVS operates hydraulically and is an effective locomotor system. This system connects to the external tube feet. Star fish often use this pathway to excrete waste, migrating unwanted material to a single tube foot which is then pinched off and expelled (Hickman et al. 2008). 

The cushion star's mouth on the oral side leads through a short oesophagus to a large stomach located in the central disc (Hickman et al. 2008).  Like other Asteroids, this species has a ciliated cardiac stomach. During feeding this stomach can be everted for external digestion of prey (Hickman et al. 2008, Other feeding experiments).  Digestion is mostly extracellular (Hickman et al. 2008). The anus of cushion stars is relatively inconspicuous, although can be seen under magnification.

The hemal system of asteroids is relatively underdeveloped and its function is not well known (Hickman et. al. 2008). It has little to do with the circulation of body fluids and appears to have some role in absorbing nutrients after feeding (Hickman et al. 2008).

The nervous system of this species consists of an oral (ectoneural) system, a deep (hyponeural) system, and an aboral system. The oral system contains a nerve ring around the mouth and a main radial nerve extending into each arm. The deep system lies aboral to the oral system, and the aboral system contains a ring around the anus, with further radial nerve extensions (Hickman et al. 2008).

Gonads of cushion stars lie in the interradial space in each arm (Hickman et al. 2008).

 

 

Images

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(2 objects, created 5/6/2011)

Album: This is a private album that is not visible to anonymous users Great Barrier Reef Invertebrates

Summary:

Date:

Album: 2012

Album: 2011

Classification

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Kingdom
Animalia
Phylum
Echinodermata
Class
Asteroidea
Order
Valvatida
Family
Oreasteridae
Genus
Culcita

Synonyms

Anthenea spinulosa ((Gray, 1847))
Culcita grex (Müller & Troschel, 1842)
Culcita pentagularis (Gray, 1847)
Culcita pentangularis (Gray, 1847)
Culcita pulverulenta (Perrier, 1869)
Goniaster multiporum (Hoffman in Rowe, 1974)
Goniaster sebae ((Müller & Troschel, 1842))
Goniodiscides sebae ((Müller & Troschel, 1842))
Goniodiscus sebae (Müller & Troschel, 1842)
Hippasteria philippinensis (Domantay & Roxas, 1938)
Hosia spinulosa (Gray, 1847)
Pentagonaster spinulosus ((Gray, 1847))
Randasia granulata (Gray, 1847)

Common Names

cushion star