From Natural History of Southeast Alaska
Best found at
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Mouth of Indian River +
, Sitka +
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Class
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Malacostraca +
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Common name is
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Oregon pillbug +
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Documentation requested
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false +
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Family
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Sphaeromatidae +
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Genus
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Gnorimosphaeroma +
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Order
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Isopoda +
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Origination status is
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Native +
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Phylum
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Arthropoda +
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Scientific name is
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Gnorimosphaeroma oregonensis +
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SpecificEpithet
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oregonensis +
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Summary
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This is basically a roly-poly by the sea. … This is basically a roly-poly by the sea. It is most often found by turning over pieces of wood in estuaries in the higher intertidal. This species has the ability to roll into a ball, and to withstand long exposures to freshwater intrusion. [[Ligia pallasi|Rock Louse (''Ligia pallasi'')]] is much larger and flatter, and runs fast. A look-alike species is [[Gnorimosphaeroma insulare|Brackish Water Pillbug (''Gnorimosphaeroma insulare'')]], which looks just the same as the Oregon pillbug, except that it is even more freshwater-tolerant, and when inspected closely, the segments go as follow: from rear to front, the rear-most segment is broad, and is followed by a segment with two creases and three extensions. That creased segment is the important one; in ''G.oregonensis'' all three extensions reach out to the edges, whereas in ''G. insulare'' the rear-most one tapers off just before reaching the edges.
If you want to dabble in isopod taxonomy, there is a third species! Its name is ''[[Gnorimosphaeroma noblei]]''. It may or may not be found in our area, and its antennae meet directly, without a rostrum in between them.rectly, without a rostrum in between them. +
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Synonyms include
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Gnorimosphaeroma oregonense +
, Exosphaeroma oregonensis +
, Sphaeroma oregonense +
, Neosphaeroma oregonense +
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TaxonRank
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species +
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Has queryThis property is a special property in this wiki.
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Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
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Categories |
Marine Invertebrate +
, Species +
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Modification dateThis property is a special property in this wiki.
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25 July 2013 09:28:46 +
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Has subobjectThis property is a special property in this wiki.
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Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
, Gnorimosphaeroma oregonensis +
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