Editing Sclerite (section)

==Invertebrates other than arthropods==
[[File:Journal.pone.0079155.g003 Clamps in various genera of Protomicrocotylidae.png|thumb|400 px|Sclerites in [[Clamp (zoology)|clamps]] in [[polyopisthocotylea]]n [[monogenea]]ns; various sclerites are in grey and black]]

Wide ranges of sclerites of various kinds occur in various invertebrate [[phylum|phyla]], including [[Polychaeta]] and [[Mollusca]]. Two [[Taxon|taxa]] that routinely have the term applied however, are the [[Alcyonacea|soft corals]] and the [[Sponge|Porifera]]. In both those groups certain of their structures contain mineralised spicules of [[Silicon dioxide|silica]] or [[Aragonite|calcium carbonate]] that are of importance structurally and in defense.

Many other invertebrates grow a few hard parts, largely mineralised, as [[Statocyst|statoliths]] and similar structures, but those are not generally referred to as sclerites. 

[[Clamp (zoology)|Clamps]], the main attachment structure of the parasitic [[polyopisthocotylea]]n [[monogenea]]n flatworms,<ref>[[Boris Evseevitch Bychowsky|Bychowsky, B. E.]] (1961). Monogenetic Trematodes their systematics and phylogeny. English translation edited by W. J. Hargis Jr. Washington: American Institute of Biological Sciences.</ref><ref>Kearn, G. C. (2004). Leeches, Lice and Lampreys. A natural history of skin and gill parasites of fishes. Dordrecht: Springer.</ref> are composed of various sclerites and associated musculature, located on a posterior organ called the [[haptor]]. Clamps are specialized structures attached to the host fish, generally to its gill.