Spider Identification

For most species of spiders, there is virtually no morphological difference between the sexes until maturity. Spiderlings emerge from the egg sac looking very much like miniature models of the adults. Because they have an exoskeleton, as spiderlings grow, they must molt in order to advance to the next larger stage of development.

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image: Xysticus californicus

Image Gallery

This tool features an image gallery for convenient viewing of all the spider images in the tool.

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DNA Search

Preserved or dead spider specimens are very fragile and may lack the color or physical structures needed for an accurate morphological identification. For this reason, a DNA search tool is provided. You can search for a match for the mitochondrial cytochrome oxidase I (COI) gene of your specimen on the DNA search page.

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