Genus Sicyonis Hertwig, 1882

Museums

Regional Maps

• Sicyonis Hertwig, R. 1882. Die Actinien der Challenger Expedition. Jena : Gustav Fischer 119 pp. [86-89, 116].

  Type species:

   Sicyonis crassa Hertwig, 1882 by monotypy.

Distribution

States

Tasmania

IBRA and IMCRA regions

IMCRA

Tasmanian Shelf Province (36)

Other Regions

Australian Antarctic Territory

Diagnosis

Actinostolidae with well developed basal disc and rather thick column, the upper part of which is able to cover the tentacles. Sphincter weak or fairly well developed, mesogloeal. Tentacles short, the inner considerably stronger than the outer, often more or less thickened on the outer side at the base, about half as numerous as the mesenteries. Longitudinal muscles of tentacles and radial muscles of oral disc mesogloeal, 2 broad siphonoglyphs. Often 16 pairs of perfect mesenteries, a variable number of pairs in which one mesentery is perfect, its partner imperfect. Arrangement of mesenteries not as regular as in Actinostola, but with a strong tendency to different development of the two mesenteries in a pair. Retractors weak, diffuse, parietobasilar and basilar muscles well developed. Mesenteries differentiated into stronger, fertile mesenteries with well developed filaments and into weaker fertile mesenteries without filaments; the latter appear at the base and grow from there in an oral direction but do not reach the most distal part of the body. Cnidom: spirocysts, basitrichs, microbasic p-mastigophores.

General References

Fautin, D.G. 2011. Hexacorallians of the World. http://geoportal.kgs.ku.edu/hexacoral/anemone2/index.cfm

History of changes