Chaetoceros peruvianus Brightwell, 1856

  • Class: Bacillariophyceae
  • Order: Chaetocerotanae incertae sedis
  • Family: Chaetocerotaceae
  • Genus: Chaetoceros
  • Species: Chaetoceros peruvianus

The cells are single, rarely found in short chains of 2-3 cells. The valves are elliptically unequal. One shaft (upper) is convex, the other (lower) is flat. Both have an equally developed curve. The protrusions of the convex shaft protrude from its center and touch their basal parts, then strongly bend outwards and follow the longitudinal axis of the shaft, gradually curving towards the lower shaft, the two growths together forming a wide arc whose ends slightly converge or are moving away. The growths of the flat shaft recede from its end, bend slightly out of the cage and go at an acute angle to the central axis of the cage. All growths are rough, visibly thickened near the middle of their length, 2.5-5 m thick, 732-1423 m long. The chromatophores are small, numerous. The species is very variable. Oceanic, non-rhetorical, widespread in the southern temperate and warm seas, in the Atlantic reaches 61 degrees north latitude.

Quotes from: Proshkina-Lavrenko, AI, 1955. Diatoms of plankton of the Black Sea. Publishing House of the USSR Academy of Sciences, Moscow-Leningrad, pp. 223.

Length : 15-46,25 m
Width : 10,8-37,5 m
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