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A guide to the deep-water sponges of - NMFS Scientific Publications ...

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Class Demospongiae, Family Plakinidae, Plakina atka Lehnert, S<strong>to</strong>ne and Heimler, 2005.<br />

(A) Spined calthrops with reduced 4 th ray, all rays with basal spines; (B) micr<strong>of</strong>urcate end <strong>of</strong> ray from a tetraloph,<br />

tetrafurcate lophocalthrops; (C) tetralophose calthrops, all rays tetrafurcate, points <strong>of</strong> rays micr<strong>of</strong>urcate; (D) smooth<br />

diods, smooth triods, and thicker triods with strongly spined bases <strong>of</strong> rays; and (E) thick category <strong>of</strong> diods with central<br />

spines. Probably derived from spined triods through reduction <strong>of</strong> one ray. (Figures A–E reproduced with permission<br />

from Zootaxa, Magnolia Press.)<br />

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