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sclerite, sclerotin, sclerotized, sclerotization

Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
No Taxon (Glossary)
No Taxon (S)
No Taxon sclerite, sclerotin, sclerotized, sclerotization
Explanation of Names
From Greek, skleros hard plus -ites constituent (1).
Identification
sclerite noun - the chitinous plates constituting the hard surface of an insect. They usually do not correspond to particular anatomical areas (particular segments of the thorax or abdomen, for instance). Sclerites in particular areas are given specific names:
tergites - on the dorsal surface of the body
laterogites - on the lateral part of the dorsal surface
pleurites - on the pleural region, derived from the base of limbs (legs)
sternites - on the ventral surface

Sclerotins are the insoluble cross-linked proteins that stiffen the flexible chitin of the insect cuticle. The hardening process of the cuticle is called sclerotization, and the cuticle is then said to be sclerotized.
Remarks
In spiders it's a hard surface on the abdomen as seen in the darker orange plate here
See Also
sclerite
tergum, tergite (dorsal)
laterogite
Print References
Gordh, A Dictionary of Entomology, p. 816 (1)
Internet References
Wikipedia--Sclerite
Works Cited
1.A Dictionary of Entomology
George Gordh, David H. Headrick. 2003. CABI Publishing.