Protoglossus van der Horst, 1935

Deland, C., Cameron, C. B., Rao, K. P., Ritter, W. E. & Bullock, T. H., 2010, A taxonomic revision of the family Harrimaniidae (Hemichordata: Enteropneusta) with descriptions of seven species from the Eastern Pacific, Zootaxa 2408 (1), pp. 1-30 : 6

Genus Protoglossus van der Horst, 1935

Balanocephalus Caullery & Mesnil, 1900

Protobalanus Caullery & Mesnil, 1904

Type species. Protoglossus koehleri ( Caullery & Mesnil, 1900)

Diagnosis. Genus characterized by short conical proboscis with deep posterior dorsal groove and conspicuous horseshoe-shaped pre-oral ciliary organ. Longitudinal musculature of proboscis radial, its paired dorsal gonads not prominent. Protoglossus considered to have simplest arrangement of enteropneust body cavities in lacking peribuccal cavities and having rudimentary or no perihaemal cavities ( Burdon-Jones, 1956). Left proboscis pore present, along with dorsal and ventral mesenteries in proboscis and collar. Cornua of skeleton extending to posterior margin of collar, forming parabuccal ridges on each side of buccal cavity.