Ligia oceanica
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Ligia oceanica, the sea slater, common sea slater, or sea roach, is a woodlouse, living in the littoral zone—rocky seashores of the European North Sea and Atlantic coastlines.
L. oceanica is oval, twice as long as broad, and may reach up to Script error: No such module "convert". in length, making it one of the largest oniscid isopods,[1][2] although its placement in this suborder is dubious given more recent molecular phylogeny data suggesting a closer relationship with Valvifera and Sphaeromatidea.[3] Its colour may vary from grey to olive green, and it has large compound eyes and long antennae, two-thirds as long as its body.[1] They are found in temperate waters from Norway to the Mediterranean Sea,[4] and from Cape Cod north to Maine.[5] It is a common species, occurring wherever the substrate of the littoral zone is rocky, and is especially common in crevices and rock pools and under stones.[1] It is a nocturnal omnivore,[6] eating many kinds of seaweed, diatoms,[1] and detritus, with a particular fondness for bladder wrack (Fucus vesiculosus).[2] Individuals live for 2<templatestyles src="Fraction/styles.css" />1⁄2–3 years and usually breed only once.[6]
Genome
The mitochondrial genome of L. oceanica was sequenced in 2006. It is a circular, double-stranded DNA molecule, with a size of 15,289 base pairs. Although gene order is not conserved among isopods, L. oceanica shows a similarly derived gene order to Idotea balthica, compared to the arthropod ground pattern, but the positions of three tRNA genes differ in the two isopod species.[7]
See also
References
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External links
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