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madreporite

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madreporite
madreporite (mædrɪˈpɔəraɪt) [f. madrepore + -ite. Cf. G. madreporit, F. madréporite.] 1. Palæont. Fossil madrepore.1828–32 in Webster. 1843 W. Humble Dict. Geol., etc., Madreporite. 1. Fossil madrepore. 2. Min. A calcareous rock of columnar structure marked by radiated prismatic concretions.1802–3 t... Oxford English Dictionary
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Madreporite
The madreporite is a light colored calcareous opening used to filter water into the water vascular system of echinoderms. , although the madreporite has significantly less of an impact on fluid regulation in sea urchins than sea stars. wikipedia.org
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Phrynophiurida
The madreporite is on the oral surface. Digestive glands are confined to central disc. wikipedia.org
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Porania pulvillus
The madreporite is in the centre. P. pulvillus has translucent soft papillae that act as gills. The oral surface (underside) is pale. wikipedia.org
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Pteraster tesselatus
It conceals the madreporite and scales on the aboral surface proper and the gap underneath it is filled with a spongy tissue. wikipedia.org
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Ophiurida
The madreporite is on the oral surface. The digestive glands are entirely within the central disc. wikipedia.org
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Neoferdina cumingi
able to reproduce asexually after splitting apart, with even pieces as small as one fifth of the original volume being able to regenerate as long as the madreporite wikipedia.org
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Ossicle (echinoderm)
Beneath this is a water-filled cavity which contains the madreporite and delicate gill structures known as papillae. A ring of specialised plates surround the aboral pole consisting of five genital plates, one of which is the madreporite, and five smaller ocular plates wikipedia.org
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Linckia guildingi
The process is quite slow, it taking 6 months for the madreporite to appear. wikipedia.org
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Paxilla (ossicle)
The water-filled cavity beneath contains the madreporite and delicate gill structures known as papullae. References Echinoderm anatomy wikipedia.org
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Echinaster spinulosus
Near one edge of this is the madreporite, a structure used for drawing in water to replenishing the water vascular system. wikipedia.org
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Astropecten armatus
The madreporite is very close to the edge of the disc. The central surface of both disc and arms is smooth. wikipedia.org
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Culcita schmideliana
The madreporite is usually an orangeish color. This starfish often has several commensal animals in its body cavity or on its surface. wikipedia.org
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Freyella elegans
The madreporite is near the margin of the disc and the anus is quite distinct and near the centre of the disc. wikipedia.org
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Axocele
It is created in larval pairs, with the left axocele developing into a channel between the hydrocele and the madreporite. wikipedia.org
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