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You are here:   OldClasses > 2012 > Alloeocomatella pectinifera | Shuting Jin

 

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Alloeocomatella pectinifera

(Clark 1911)

Red Feather Star

Shuting Jin (2012)

 

Fact Sheet

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Summary


Physical Description


Ecology


Local Distribution and Habitats


Commensalisms


Life History & Behaviour


Reproduction


Feeding


Cyclicity


Anatomy and Physiology


External Anatomy


Internal Anatomy


Physiology


Evolution & Systematics


Fossil Record


Phylogeny


Biogeographic Distribution


Conservation


Status


Threats


Resources


References


Acknowledgements


Contact

Feeding

Feather stars suspension feed by extending their long feathery arms into ambient currents and waiting for food to drift by (Ruppert et al. 2004). Small tube feet are arranged in groups of three along both sides of the food groove on the pinnules (Lawrence 1987), see Fig. 5B. When food comes into contact with the pinnules, the longest tube foot curls rapidly inward, pushing the food into the food groove (Lawrence 1987; Ruppert et al. 2004). The food is transported down the arms via ciliary motion (Lawrence 1987). Orientation during feeding is usually perpendicular to the water current, with the arms outstretched in a plane or parabola shape (Ruppert et al. 2004).

The diet consists of a variety of plankton and nekton between 20 and 150 micrometers in size, including detritus, diatoms, unicellular algae, larvae, and small crustaceans (Featherstone et al. 1998).


Fig. 5. Crinoid oral surface. A) Food grooves on the dorsal surface of pinnules connect to the main ambulacral groove of the arms (blue), leading to the mouth (purple) located at the margin of the central disk (royal blue) in a specimen of Alloeocomatella pectinifera collected from Heron Reef. B) Inverted color image of arm detail of specimen in (A). Tube feet can be seen as very fine threads emerging from either side of the food groove (detail can be seen better on zoom). C) Central disk of A. pectinifera showing prominent comb teeth characteristic of this genus. Image C used with permission from Rouse et al. (n.d.). Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License




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Classification

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