Early 19th century; earliest use found in William Kirby (1759–1850), entomologist and naturalist. From fossula + -ate, originally (in entomological use) after scientific Latin fossulatus, fossulata, specific names of beetles.
Definition of fossulate in US English:
fossulate
adjectiveˈfɒsjʊlət
Botany Entomology
Having, or consisting of, one or more fossulae.
Origin
Early 19th century; earliest use found in William Kirby (1759–1850), entomologist and naturalist. From fossula + -ate, originally (in entomological use) after scientific Latin fossulatus, fossulata, specific names of beetles.