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A new deep sea coralline sponge from Turks and Caicos Islands: Willardia caicosensis gen. et sp. nov. (Demospongiae: Hadromerida)
Willenz, P.; Pomponi, S.A. (1996). A new deep sea coralline sponge from Turks and Caicos Islands: Willardia caicosensis gen. et sp. nov. (Demospongiae: Hadromerida). Bull. Kon. Belg. Inst. Natuurwet. Biologie 66(Suppl.): 205-218
In: Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen. Biologie = Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Biologie. Koninklijk Belgisch Instituut voor Natuurwetenschappen: Bruxelles. ISSN 0374-6429, more
Peer reviewed article  

Also published as
  • Willenz, P.; Pomponi, S.A. (1996). A new deep sea coralline sponge from Turks and Caicos Islands: Willardia caicosensis gen. et sp. nov. (Demospongiae: Hadromerida), in: Willenz, Ph. Recent advances in sponge biodiversity inventory and documentation: Proceedings of the 10th Workshop on Atlanto-Mediterranean Sponge Taxonomy, Brussels, April 25-30, 1995. Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen. Biologie = Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Biologie, 66(Suppl.): pp. 205-218, more

Available in Authors 
Document type: Conference paper

Keywords
    Coral; New genera; Sponges; Porifera [WoRMS]; Timeidae Topsent, 1928 [WoRMS]; Marine

Authors  Top 
  • Willenz, P., more
  • Pomponi, S.A.

Abstract
    A new coralline sponge, Willardia caicosensis, assigned to the family Timeidae, is described from the deep fore reef off the Turks & Caicos Islands, tropical western Atlantic Ocean, where it is common at depths ranging from 100 to 119 m. Individuals vary up to 15-20 cm in width. The relatively thin aragonitic skeleton is covered with delicate pillars up to + 1 mm. The living tissue is restricted to the spaces between pillars and a thin sheet lying above the calcareous skeleton. Exhalant canals converge upon regularly spaced central oscules on the sponge surface. Siliceous spicules include tylostyles and amphiasters which are secondarily embedded in the aragonitic moiety of the skeleton. In addition, ultrastructural characters of thechoanocytes, such as periflagellar sleeves are typical of the Order Hadromerida. Two types of cells with dense spherules are abundant in the mesohyl: sperulous cells packed with large heterogeneous inclusions, protruding at the surface of the sponge, and glycocytes with smaller ovoid corpuscles, mainly grouped along the basal calcareous skeleton. Rough collagen fibrils extend in tracts from the base of the sponge to the ectosome. Sparse bacteria are scattered in the mesohyl.

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