Limmenius
Genus description from Horning et al. 1978: “Head without normal buccal lamellae, but with 1 or more membranous flaps constituting a buccal opening; without parabuccal papillae but with 2 head papillae. Mouth tube simple, constricted basally, without stylets or stylet supports. Pharyngeal tube elongate, without placoids. Double claws unequal in size, but symmetrical about median plane of […]