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Leathery sea squirt, Styela clava
제목: Leathery sea squirt, Styela clava
출처: http://www.marine.csiro.au/crimp/nimpis/spsummar...
Styela clava3.jpg
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Leathery sea squirt, Styela clava


Leathery sea squirt, Styela clava

Species Summary

Styela clava
Herdman, 1881

USGS - http://nas.er.usgs.gov/tunicates/

Taxonomy
Phylum: Chordata
Subphylum: Tunicata
Class: Ascidiacea
Order: Pleurogona
Suborder: Stolidobranchia
Family: Styelidae
Genus: Styela
Description
Styela clava is a large, club-shaped solitary ascidian with a tough leathery body wall (test), growing up to 160mm long. It consists of an elongated, cylindrical body on top of a stalk of variable length. It can be brownish-white, yellowish-brown or reddish-brown. There are two short siphons towards the top of the organism, each with a 4-lobed opening. The body has conspicuous tubercles and rounded swellings on the upper portion and rounded longitudinal ridges on the lower half. The stalk surface is creased. Internally, the gut is a simple U-shaped loop.

large white
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