Striate

Definition

Marked with fine, parallel grooves, lines, or ridges; having a surface texture composed of narrow, elongated depressions or elevations aligned in a consistent direction. In arthropod morphology, striate ornamentation appears on cuticle, sclerites, eggs, and setal bases, often serving as species-diagnostic characters or structural adaptations for flexibility, camouflage, or frictional grip.

Etymology

From Latin striatus, past participle of striare to groove, from stria furrow or channel.

Example

The elytra of many ground beetles (Carabidae) are distinctly striate, with eight to ten impressed longitudinal lines that aid in species identification; in some spider egg sacs, a striate surface texture created by silk wrapping patterns provides both structural integrity and moisture retention.

Synonyms

• striated
• sulcate
• canaliculate

Related Terms

• costate
• Rugose
• punctate
• reticulate
• carinate
• strigose
• striation

Usage Notes

Distinguished from costate (bearing prominent ribs or ridges) and rugose (wrinkled or irregularly rough) by the regularity and fineness of the parallel markings. Striate describes the condition; striation (the noun) refers to the groove or ridge itself. In taxonomic descriptions, striate is often qualified by density (finely striate, coarsely striate) or extent (striate basally, striate throughout). Not to be confused with strigose, which denotes stiff, appressed bristles or sharp ridges.