Eucratea Lamouroux, 1812

Type species: Sertularia loricata Linnaeus, 1758

Colony erect, tufted, much branched, attached to the substratum by a cluster of rhizoids. Branches composed of pairs of zooids joined back-to-back (ie by their basal surfaces), each giving rise disto-basally to the next pair, all the pairs orientated the same way. Branches generally originating alternately to the left and to the right of the main axis, the first autozooid in the branch arising disto-laterally on its parent; the branches themselves dividing dichotomously. Zooids elongated, narrow proximally. Frontal membrane oval, situated in the distal part of the autozooid. Spines and avicularia absent. Embryos developing in membranous evanescent ovisacs, not in ooecia. (Hayward & Ryland, 1998)

This genus includes the species:

  1. Eucratea loricata
  2. (Linnaeus, 1758) Recent Europe, Atlantic, Arctic, E. Pacific WoRMS 111361
  3. Eucratea loricata arctica
  4. (Kluge, 1915) Recent Arctic WoRMS 472695
  5. Eucratea loricata cornuta
  6. (Osburn, 1932) Recent North Atlantic WoRMS 472694
  7. Eucratea loricata macrostoma
  8. (Ortmann, 1890) Recent Northwest Pacific - Japan WoRMS 991948

  Sertularia loricata plate from Esper (1796)

Eucratea loricata at Encyclopedia of Marine Life of Britain and Ireland.

Eucratea loricata page at

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Edited by Phil Bock
Modified on 4th May 2006
Modified on 11/5/2017 (3 subspecies added)
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