gill lamella; branchial lamella; gill filament
branchial arch; gill arch
Heterobranchia; clade of snails and slugs
lamellibranches (i.e. bivalves)
pterobranchs (hemichordates of class Pterobranchia)
enteropneusts (hemichordates of class Enteropneusta)
jawbone; mandible; branchial arches (in fish); gill arches
gill plate; branchial plate; gill lamella; branchial lamella
gill slit; pharyngeal slit
gill sac; branchial sac; branchial pouch; inner branchial groove; pharyngeal pouch