Photosynthetic species of the dinoflagellate genus Dinophysis are known to retain temporary cryptophyte plastids of the Teleaulax/Plagioselmis/Geminigera clade after feeding the ciliate Mesodinium rubrum. In the present study, partial plastid 23S rDNA sequences were retrieved in Southern Chilean waters from oceanic (Los Lagos region), and fjord systems (Aysén region), in single cells of Dinophysis and accompanying organisms (the heliozoan Actinophrys cf. sol and tintinnid ciliates), identified by means of morphological discrimination under the light microscope. All plastid 23S rDNA sequences (n = 23) from Dinophysis spp. (Dinophysis acuta, D. caudata, D. tripos and D. subcircularis) belonged to cryptophytes from clade V (Rhinomonas, Rhodomonas and Storeatula), although they could not be identified at genus level. Moreover, five plastid sequences obtained from heliozoans (Actinophryida, tentatively identified as Actinophrys cf. sol), and tintinnid ciliates, grouped together with those cryptophyte sequences. In contrast, two additional sequences from tintinnids belonged to other taxa (chlorophytes and cyanobacteria). Overall, the present study represents the first time that red cryptophyte plastids outside of the Teleaulax/Plagioselmis/Geminigera clade dominate in wild photosynthetic Dinophysis spp. These findings suggest that either Dinophysis spp. are able to feed on other ciliate prey than Mesodinium and/or that cryptophyte plastids from clade V prevail in members of the M. rubrum species complex in the studied area.

甲藻属物种光合鳍藻已知保留的临时cryptophyte质Teleaulax / Plagioselmis / Geminigera供给纤毛虫后进化枝缢虫。在本研究中，局部质体23S rDNA序列在南智利水域被检索从海洋（洛斯拉戈斯区域），和峡湾系统（艾森区域），在单个细胞鳍藻伴随生物体和（在heliozoan Actinophrys比照溶胶和丁丁虫纤毛虫），通过光学显微镜下的形态学鉴别来鉴定。 来自Dinophysis spp的所有质体23S rDNA序列（n = 23）。（鳍藻蚧，D.尾目，D.荣誉学位和D. subcircularis）属于从进化V（cryptophytes Rhinomonas，Rhodomonas和Storeatula），虽然他们不能在属水平上鉴定。此外，将从日生动物（Actinophryida，暂定为Actinophrys cf. sol）和丁香纤毛虫获得的五个质体序列与那些隐植物序列一起分组。相比之下，来自tintinnids的另外两个序列属于其他分类群（绿藻和蓝细菌）。总体而言，本研究代表了Teleaulax / Plagioselmis / Geminigera进化枝以外的红色隐生植物质体在野生光合作用中占主导地位恐龙属 这些发现表明，要么是Dinophysis spp。是能够在其它纤毛虫猎物比进料缢和/或来自进化枝信息v cryptophyte质在成员为准M.癣菌物种在研究区复杂。