Graminivory

Definition

The consumption of grasses (family Poaceae) as primary food; a specialized form of herbivory distinguished from general folivory or browsing by dietary restriction to true grasses and their close relatives. Graminivory imposes distinct selective pressures on consumers, including requirements for cellulose digestion, silica tolerance, and often morphological adaptations for processing fibrous, abrasive plant material.

Etymology

From Latin gramen (grass) + -vorus (devouring), with suffix -y indicating the process or condition.

Example

Many acridid grasshoppers (Acrididae) exhibit graminivory, with mandibular asymmetry and robust mandibular muscles adapted for shearing tough grass blades; this contrasts with mixed-feeding or forb-specialist grasshoppers that possess more generalized mouthpart morphology.

Synonyms

• grass-feeding

Related Terms

• herbivory
• folivory
• grazing
• Poaceae
• cellulose digestion
• Phytophagy
• host plant specialization

Usage Notes

Distinguished from general grazing, which may include non-grass herbs, sedges, or rushes. In entomology, graminivory is most common in Orthoptera, some Lepidoptera larvae (e.g., certain Noctuidae), and select Coleoptera, though true specialization on grasses is less common in insects than in mammals. The term implies dietary dominance (>50% grass content), not incidental consumption. Contrast with graminivore, which denotes the organism exhibiting this feeding mode.