Gonyaulax spinifera (Claparède & Lachmann) Diesing, 1866

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 : 956-957

Gonyaulax spinifera (Claparède & Lachmann) Diesing, 1866

Figure 4C, D

Brazil, estuary of Maraú River: Mixing Zone Station 2, 14°04′52″S, 038°59′12″W, XI.2006 (HUESC 24047), I.2007 (HUESC 24054); Mixing Zone Station 3, 13° 57′24″S, 038°59′38″W, XI.2006 (HUESC 24048), Coastal Zone Station 4, 13°54′56″S, 038°58′57″W, X.2006 (HUESC 24045).

Rhomboid cell, slightly longer than broad,

epitheca conical gradually reduced in a short apical horn, hypotheca with variable number of antapical spines with lateral lists, cingulum wide, excavated, descending, with marked overlapping and displaced 2× cingulum width. TL: 27.5–40 μm (33.8 ± 5.9 μm), CW: 25–27.2 μm (26.05 ± 1.22 μm) (n = 4).

Distribution in Brazil: coastal regions of Pará, Rio Grande do Norte, Rio de Janeiro, Santa Catarina, and Rio Grande do Sul ( Flora do Brasil 2019), Bahia ( Affe et al.2018).