HABs note details
Taxonomy
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The species was suggested by Gomez et al. (2017) to be a synonym of Prorocentrum mexicanum. However, the two species differ in both morphology and ecology. P. rhathymum is a benthic marine dinoflagellate with a characteristic pattern of trichocyst pores on the thecal plates, some of which are arranged in radiating lines towards the lateral sides. P. mexicanum is from the marine phytoplankton and it is unclear from the original description whether it has radiating lines of trichocyst pores (likely not), the pores are scattered on thecal surface. See Hoppenrath et al. (2014) for further information on P. rhathymum. Further studies of the species complex (P. mexicanum, P. rhathymum, P. steidingeae) are needed to clarify species delimitations and synonymy.
Hoppenrath, M.; Murray, S. A.; Chomérat, N.; Horiguchi, T. (2014). Marine benthic dinoflagellates - unravelling their worldwide biodiversity. <em>Kleine Senckenberg-Reihe.</em> 54: 1-276. (look up in IMIS)
Gomez, F., Qiu, D. & Lin, S. (2017). The synonymy of the toxic dinoflagellates <i>Prorocentrum mexicanum</i> and <i>P. rhathymum</i> and the description of <i>P. steidingerae</i> sp. nov. (Prorocentrales, Dinophyceae). <em>J. Eukaryotic Microbiol. 64: 668-677.</em>
Gomez, F., Qiu, D. & Lin, S. (2017). The synonymy of the toxic dinoflagellates <i>Prorocentrum mexicanum</i> and <i>P. rhathymum</i> and the description of <i>P. steidingerae</i> sp. nov. (Prorocentrales, Dinophyceae). <em>J. Eukaryotic Microbiol. 64: 668-677.</em>
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