Prorocentrum gracile Schütt

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

Prorocentrum gracile Schütt

Figure 6C

Brazil, estuary of Maraú River: River Zone Station 1, 14°06′33″S, 039°02′48″W, IX.2006 (HUESC 24039), X.2006 (HUESC 24042), III.2007 (HUESC 24062), VII. 2007 (HUESC 24078), VIII.2007 (HUESC 24082); Mixing Zone Station 2, 14°04′52″S, 038°59′12″W, XI.2006 (HUESC 24047), I.2007 (HUESC 24055), II.2007 (HUESC 24059), III.2007 (HUESC 24063), V.2007 (HUESC 24071), VI.2007 (HUESC 24075), VII.2007 (HUESC 24079), VIII.2007 (HUESC 24083); Mixing Zone Station 3, 13°57′24″S, 038°59′38″W, IX.2006 (HUESC 24040), XI.2006 (HUESC 24048), XII.2006 (HUESC 24052), I.2007 (HUESC 24056), II.2007 (HUESC 24060), III. 2007 (HUESC 24064), IV.2007 (HUESC 24068), V.2007 (HUESC 24072), VI.2007 (HUESC 24076), VII.2007 (HUESC 24080), VIII.2007 (HUESC 24084); Coastal Zone Station 4, 13°54′56″S, 038°58′57″W, X.2006 (HUESC 24045), II.2007 (HUESC 24061), IV.2007 (HUESC 24069), VI.2007 (HUESC 24077), VII.2007 (HUESC 24081), VIII.2007 (HUESC 24085).

Cell elongated, piriform, with asymmetrical sides; one margin convex and other slightly sigmoid; antapex pointed; one long, winged anterior spine. CL: 40–72.5 μm (58.9 ± 12.1 μm), TL: 55–90 μm (75.8 ± 13.7 μm), CW: 20–25 μm (22.4 ± 2.1 μm) (n = 29).

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