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Ligia occidentalis in Canada??

The Pacific Coast of North Amer from Alaska to Baja CA have 2 native species of Ligia or 'rock louse'. Based on GBIF records and this atlas, the native Ligia pallaisi is supposed to range from Alaska to the San Francisco bay (with a disjunct Santa Cruz population). The native Ligia occidentalis is supposed to range from the California border south to ~ the tip of Baja in Mexico.

The above pic compares the two with Ligia occidentalis at the top. Ligia pallaisi and Ligia occidentalis can be distinguished by the width between the eyes (wide in the former, narrow in the latter) and the ...more ↓

Posted on June 30, 2016 08:31 PM by loarie loarie | 1 comments | Leave a comment
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Terrestrial isopods (aka Oniscidea or 'Woodlice') are a bizarre but often encountered group of critters - this project is a place to learn more about them! And besides whats cooler than crustaceans that live on land... I have an accompanying guide here.

Mini loarie created this project on November 03, 2015

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