Piceous

Definition

Jet-black or pitch-black in color; a specific color descriptor in arthropod taxonomy and morphology denoting a deep, lustrous black without metallic or colored overtones. Distinguished from 'niger' (simply black) by its emphasis on the tar-like depth and slight gloss of pitch, and from 'atrous' (dead black, matte). Frequently encountered in species epithets describing the predominant body coloration of beetles, true bugs, and other dark-colored insects.

Etymology

From Latin 'piceus' (of pitch, pitchy), from 'pix, picis' (pitch, tar)

Example

The leafhopper Xestocephalus piceous Osborn, 1928 bears a uniformly piceous dorsum that aids in crypsis against charred plant stems in post-fire habitats.

Synonyms

• pitch-black
• jet-black

Related Terms

• niger
• atrous
• melanic
• fuscous
• color morph
• epithet

Usage Notes

In modern taxonomy, 'piceous' appears most often in historical species names rather than contemporary descriptions, where more standardized color terminology (e.g., Pantone or Munsell references) is increasingly preferred. When used in morphological descriptions, it implies a color darker than 'fuscous' (dusky brown-black) and more saturated than 'nigricans' (blackish). The term carries no implication of surface texture—specimens may be smooth, punctate, or setose while still described as piceous. Not to be confused with 'picea' (spruce, fir), though both derive from Latin 'pix'.