The cell is thecate,  of medium size. The epitheca, which is half as high as it is wide, is prolonged into a straight, short, robust apical horn. The hypotheca, which is double the size of the epitheca, extends into two well-developed antapical horns. The left antapical horn, slightly thicker and more robust than the other, is curved and then runs parallel to the apical horn, while the right antapical horn curves sharply, initially parallel but then converging towards the apical horn.

Marine species

Distribution: As Ceratium breve: Atlantic Ocean: Canary Islands (Gil-Rodríguez et al., 2003; Anon, 2011); Australia and New Zealand: New Zealand (Chang et al., 2012).

As Neoceratium breve. South America: Brazil (Odebrecht, 2010).

Dinophyceae. In: Catálogo de plantas e fungos do Brasil. Vol. 1., (Forzza, R.C. Eds), Rio de Janeiro: Andrea Jakobsson Estúdio; Instituto de Pesquisas Jardim Botânico do Rio de Janeiro., Odebrecht C., 2010, 366-383

Listado preliminar de especies marinas de Canarias., Tenerife: Observatorio Ambiental Granadilla, Anon, 2011, 1-174

Phylum Myzozoa: dinoflagellates, perkinsids, ellobiopsids, sporozoans. In: New Zealand inventory of biodiversity. Volume Three. Kingdoms Bacteria, Protozoa, Chromista, Plantae, Fungi., Gordon, D.P. Eds, Chang F.H., Charleston W.A.G., McKenna P.B., Clowes C.D., Wilson G.J. e Boady P.A., 2012, 175-216

Proctoctista. In: Lista de especies marinas de Canarias (algas, hongos, plantas y animales). (Moro, L., Martín, J.L., Garrido, M.J. & Izquierdo, I. Eds), Las Palmas: Consejería de Política Territorial y Medio Ambiente del Gobierno de Canarias., Gil-Rodríguez M.C., Haroun R., Ojeda Rodríguez A., Berecibar Zugasti E., Domínguez Santana P., Herrera Morán B., 2003, 5 - 30