States/Provinces Summary
Sphaeroma walkeri  in California, USA
Main ref. (81617). Harrison, K. and D.M. Holdich, 1984. Hemibranchiate sphaeromatids (Crustacea: Isopoda) from Queensland, Australia with a world-wide review of the genera discussed. Zool. J. Linn. Soc. 15:555-605. 
Status: introduced 
Abundance:  
Comments:  
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