Peridinium conicum, (Gran) Balech, 1974

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 conicum (Gran) Balech, 1974

Figure 7 C, D

Brazil, estuary of Maraú River: River Zone Station 1, 14°06′33″S, 039°02′48″W, X.2006 (HUESC 24042), III.2007 (HUESC 24062); Mixing Zone Station 2, 14° 04′52″S, 38°59′12″W, XI.2006 (HUESC 24047), II.2007

(HUESC 24059); Mixing Zone Station 3, 13°57′24″S, 038°59′38″W, VI.2007 (HUESC 24076); Coastal Zone Station 4, 13°54′56″S, 38°58′57″W, X.2006 (HUESC 24045).

Cell pentagonal, dorsiventrally flattened; epitheca conical, without apical horn; cingulum excavated, circular, without displacement; tabulation ortho-hexa, plate 1′ diamond-shaped, as long as wide and plate 2a trapezoidal; hypotheca with short antiapical horns ended by short spines. TL: 80 μm, CW: 100 μm (n = 1).

Distribution in Brazil: coastal regions of Amapá, Pará; along the eastern, southeastern, and southern coasts ( Flora do Brasil 2019).