Abstract
Trachycladidae Hallmann (Demospongiae, Hadromerida), contains two genera with at least nine species, all having an axial (or basally) compressed skeleton, and an extra-axial plumo-reticulate skeleton, with megascleres predominantly oxeas, less often strongyles and/or (tylo-)styles, in spongin-enforced multispicular tracts, or in the case of encrusting species, megascleres erect on the substrate (in hymedesmioid arrangement). Ectosomal skeleton is a crust of spinispirae (spined vermiform spiraster-like spicules), with smooth microrhabds and/or spinispirae dispersed throughout the mesohyl. The two genera are differentiated on the basis of fundamental differences in spinispirae morphology. Species are known from the shallow subtidal to about 220 m depth, distributed from temperate Australia, New Zealand and New Caledonia, Indonesia, East Africa and South Africa, Mediterranean and the western North Atlantic.
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© 2002 Kluwer Academic / Plenum Publishers, New York
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Hooper, J.N.A., Van Soest, R.W.M. (2002). Family Trachycladidae Hallmann. In: Hooper, J.N.A., Van Soest, R.W.M., Willenz, P. (eds) Systema Porifera. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-0747-5_28
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DOI: https://doi.org/10.1007/978-1-4615-0747-5_28
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-306-47260-2
Online ISBN: 978-1-4615-0747-5
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