hexactinellid

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Related to Hexactinellida: Demospongiae

hexactinellid

(hɛkˌsæktɪˈnɛlɪd)
n
(Animals) a type of sponge characterized by their (usually) six siliceous spicules or rays. Also called: hexact
References in periodicals archive ?
Of the recorded species, 13 species belongs to class Demospongiae, 2 to Calcarea and 1 to Hexactinellida. The percentage distribution (by order) of sponges showed that the Order Halichondrida had the highest species composition (31.25%), followed by Leucosolenida, Axinellida, Hadromerida, and Poecilosclerida each with 12.5%.
Porifera Grant, 1836 Hexactinellida Schmidt, 1870 Laocoetis samueli (d'Archiac, 1850) cf.
One such form appears to be a sponge that might be assignable to the modern class of Hexactinellida. (30)
Glass sponges (Hexactinellida: Porifera)," Journal of Experimental Zoology B, vol.
Two species of hexactinosidan sponges, Aphrocallistes vastus and Heterochone calyx, build a framework of densely packed sponge skeletons while several other species of hexactinellida and demosponges are accessory fauna.
Heart urchin unident 17.28 Amphiophiura ponderosa Brittlestarfish unident 16.33 Chionoecetes tanneri True Tanner crab 15.42 Cephalopoda (class) Squid unident 11.30 Scyphozoa (class) Jellyfish unident 10.66 Hexactinellida (class) Glass sponge unident 8.85 Salpida (order) Salps unident 7.13 Asteroidea (class) Starfish unident 5.08
In situ feeding and metabolism of glass sponges (Hexactinellida. Porifera) studied in a deep temperate fjord with a remotely operated submersible.
Only glass sponges (class Hexactinellida) are known to be able to arrest flagella in response to mechanical stimuli (see review by Leys and Meech, 2006).
Members of the subphylum Symplasma, the Hexactinellida, are the only sponges known to be capable of rapid behavior (Lawn et at., 1981; Mackie et at., 1983).