Amphidiscophora

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Related to Hexactinellid: glass sponge

Amphidiscophora

[¦am·fə·di′skäf·ə·rə]
(invertebrate zoology)
A subclass of sponges in the class Hexactinellida characterized by an anchoring tuft of spicules and no hexasters.
References in periodicals archive ?
In Ardanatz (and Arraitza) hexactinellid and lithistid sponges occur.
1991): Adaptation of the hexactinellid sponges to deep-sea life.
Correction of Ijima's (1927) list of recent hexactinellid sponges (Porifera).
Size independent selective filtration of ultraplankton by hexactinellid glass sponges.
Cytoskeletal architecture and organelle transport in giant syncytia formed by fusion of hexactinellid sponge tissues.
Here we present the TK domains of InsR-(like) molecules that have been isolated from the hexactinellid sponge Aphrocallistes vastus, the demosponge Suberites domuncula, and the calcareous sponge Sycon raphanus.
Specific sites and sequence characteristics were also present as outlined earlier (Muller and Schacke, 1996): in subdomain I, the ATP-binding site [consensus: GxGxxGxV; but in the hexactinellid INR_AV sequence G is replaced by R]; within subdomain II, the residue Lys in the consensus VAxK, which is required for kinase activity; within subdomain Vib: the aa D [Asp] and N [Asn] as well as in subdomain VII: the DFG tripeptide is present.
Hexactinellid sponges possess perhaps the longest transport pathway known in the Porifera, but translocation is intrasyncytial and occurs through a highly dynamic three-dimensional network of reticulated tissue, rather than along fixed pathways (Wyeth et al.
Use of sandwich cultures for the study of feeding in the hexactinellid sponge Rhabdocalyptus dawsoni (Lambe, 1892).
The syncytial organization of hexactinellid sponge tissue has been in question since the histology of dredged specimens was first examined.
A large group of sponges, the hexactinellids, have syncytial epithelia (Mackie and Singla, 1983).