Abstract
Amphidiniopsis is one of the most specious genera of sand-dwelling dinoflagellates. However, its systematic position and the affinities to other genera remain unresolved. We obtained the first SSU rDNA sequences of two species of Amphidiniopsis , A. hirsut a and A. swedmarkii collected from the French coasts of the English Channel. In the corresponding SSU rDNA phylogeny, the sand-dwelling Amphidiniopsis spp., Thecadinium dragescoi , Herdmania litoralis and the planktonic Archaeperidinium (= Protoperidinium ) minutum formed a strongly supported clade (100% bootstrap support), with a Scrippsiella-like species occupying a basal position. This clade branched close to families of Peridiniales such as Calciodinellaceae ( Scripssiella ), Podolampadaceae ( Podolampas, Roscoffia ), Heterocapsaceae ( Heterocapsa ) and other peridinioids. The members of the clade of Amphidiniopsis are placed in the family Amphidiniopsidaceae, within the Peridiniales.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
