Ascidonia californiensis is a species of caridean shrimp (true shrimps) that belongs to the family Palaemonidae. This species can be found on the Eastern Pacific Ocean along the U.S. state of California.Fransen, C.. (2002). Taxonomy, phylogeny, historical biogeography, and historical ecology of the genus Pontonia Latreille (Crustacea: Decapoda: Caridea: Palaemonidae). Zoologische Verhandelingen. 336. 1-433.
This species was described in 1902 by Rathbun and it is a Combinatio nova (comb. nov). Pontonia californiensis is now a synonymised name.
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