Tripos Bory de St.-Vincent 1823

First depiction of the dinoflagellate now know as Ceratium fusus by Christian Ehrenberg in 1834 as Peridinium fusus.

From the Bay of Villefranche in December 2013

Ceratium furca from the Bay of Villefranche. Living cell, note that the trailing flagella was rotating.

First depiction of Ceratium furca was by Christian Ehrenberg in 1834 as Perdinium furca. Note the drawing of a rotating flagella.

First described by Paul Gourret in 1883 as Ceratium fusus, var. extensum. now known as Ceratium extensum or Neoceratium extensum

Ceratium extensum (or Neoceratium extensum), the longest Ceratium species. Specimen from the Bay of Villefranche.

Reboredo, Galicia, Spain

Reboredo, Galicia, Spain

Tarragona, Catalunya, Espaa

Bright field portrait of the dinoflagellate Ceratium furca (Ehrenberg) Claparéde and Lachmann 1858, trailing flagellum can be seenb. From a freshwater pond near Boise, Idaho.

C. furca is a species with strongly developed apical horns, the left antapical horn is twice as long as the right one. The epithecal plates arereticulated to form ridges This species forms blooms in summer/ autumn in the North and Irish Sea.

A distinctive species with a long apical horn and a long left antapical horn. The left anatapical horn is very short. This species is found in oceanic coastal and estuarine sites. It is known to form blooms in autumn in the North and Irish Sea.

Ceratium (serr-at-ee-um) longipes, a representative of a large and distinctive genus of marine autotrophic dinoflagellates - made distinctive by having one anterior and two or as in this case three, posterior horns. Phase contrast microscopy. data on this strain.

Ceratium (serr-at-ee-um) longipes, a representative of a large and distinctive genus of marine autotrophic dinoflagellates - made distinctive by having one anterior and two or as in this case three, posterior horns. This may be a cell in early division. The posterior trailing flagellum is also visible. Dark ground illumination. data on this strain.

This species is closely related to Ceratium horridum. A distinguishing feature is the the apical horn which is bent to the right in C. longipes. It is a cold water species

Ceratium macroceros.

Lugol's-fixed specimen from the NW Med.

This species has a highly variable morphology. The cell body is small with long apical and antapical horns which are pointing towards the ventral side of the body. The horns are open ended. This species can be common in the North and Irish Sea in summer and autumn.

This species of Ceratium seems to be polymorphoric as the 'platy cornes' are variable in width & shape. This specimen was preserved with lugols & found in the NW Med in October.