Prorocentrum argentinense, Balech, 1979

Nunes, Caio Ceza da Silva, Susini-Ribeiro, Sylvia Maria Moreira & Cavalcante, Kaoli Pereira, 2019, Dinoflagellates in tropical estuarine waters from the Maraú River, Camamu Bay, northeastern Brazil, Check List 15 (5), pp. 951-963 : 958

Protoperidinium cf. argentinense Balech, 1979

Figure 7A, B

Brazil, estuary of Maraú River: Mixing Zone Station 2, 14°04′52″S, 038°59′12″W, I.2007 (HUESC 24055).

Epitheca small, conical, with sinuous sides; tabulation ortho-hexa; plate 1′ convex, with short proximal sides and long distal sides almost parallel in the central part; anterior intercalary plates almost equal in size, with 2a hexagonal and 1a and 3a pentagonal. CW: 29.5 μm, EL: 19.5 μm (n = 1).

Taxonomic remarks: the only epitheca observed in this study is similar to P. cf. argentinense , from the Gulf of Mexico, in having three intercalary plates ( Okolodkov 2008). This feature makes it distinct of P. argentinense , as originally described by Balech (1979, 1988), which has only two unequal intercalary plates. Analysis of more individuals is required for accurate identification.

Distribution in Brazil: this pecies has never been cited for Brazil.