oxystomatous
/ˌɒksɪˈstəʊmətəs/Zoology
adjective
Having the mouthparts sharply projecting; specifically of or relating to crabs of the section Oxystomata, which have triangular mouth frames.
Origin
Mid 19th century; earliest use found in Robert Mayne (1808–1868). From oxy- + -stomatous, after scientific Latin Oxystomata, former family name (now section name).