Genus Triactis Klunzinger, 1877

Museums

Regional Maps

• Triactis Klunzinger, C.B. 1877. Die Korallthiere des rothen Meeres Erster Theil: Die Alcyonarien und Malacodermen. Berlin : Verlag der Gutmann'schen Buchhandlung 98 pp. [85-86].

  Type species:

   Triactis producta Klunzinger, 1877 by monotypy.

Distribution

States

Northern Territory, Queensland

IBRA and IMCRA regions

IMCRA

Northern Shelf Province (25), Central Eastern Shelf Transition (39), Northeast Shelf Province (40)

Diagnosis

Aliciidae with well developed pedal disc. Column smooth, with a central ring of stalked dichotomously ramified outgrowths (= pseudotentacles), which increase in number and degree of branching with age of the individual. Hemispheric vesicles containing microbasic and macrobasic amastigophores occur on the stalk near the branches, and on the column close to the oral side of the stalk. Stalk with few, longitudinal, very weak bands of endodermal muscles. No distinct sphincter. Margin tentaculate. Tentacles not numerous, hexamerously arranged, with distal spots as on the column. Longitudinal muscles of tentacles and radial muscles of oral disc ectodermal. Two distinct siphonoglyhs. Six pairs of perfect mesenteries and several imperfect. Two pairs of directives. Retractors weak, parietobasilar muscles very weak. Cnidom: spirocysts, basitrichs, microbasic p-mastigophores, microbasic and macrobasic amastigophores.

General References

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

History of changes