Harrimaniidae

Harrimaniidae is a basal family of acorn worms. A taxonomic revision was undertaken in 2010, and a number of new genera and species found in the Eastern Pacific were described. In this family the development is direct without tornaria larva, and circular muscle fibers in their trunk is missing. There is some indication that Stereobalanus may be a separate basal acorn worm lineage, sister to all remaining acorn worms.

==Species== The following genera and species are listed in the World Register of Marine Species: Harrimania Ritter, 1900 Harrimania kupfferi (von Willemoes-Suhm, 1871) Harrimania maculosa Ritter, 1900 Harrimania planktophilus Cameron, 2002 Horstia Deland, Cameron, Rao, Ritter & Bullock, 2010 Horstia kincaidi Deland, Cameron, Rao, Ritter & Bullock, 2010 Meioglossus Worsaae, Sterrer, Kaul-Strehlow, Hay-Schmidt & Giribet, 2012 Meioglossus psammophilus Worsaae, Sterrer, Kaul-Strehlow, Hay-Schmidt & Giribet, 2012 Mesoglossus Deland, Cameron, Rao, Ritter & Bullock, 2010 Mesoglossus bournei (Menon, 1904) Mesoglossus caraibicus (van der Horst, 1924) Mesoglossus gurneyi (Robinson, 1927) Mesoglossus intermedius Deland, Cameron, Rao, Ritter & Bullock, 2010 Mesoglossus macginitiei Deland, Cameron, Rao, Ritter & Bullock, 2010 Mesoglossus pygmaeus (Hinrichs & Jacobi, 1938) Protoglossus van der Horst, 1935 Protoglossus graveolens Giray and King, 1996 Protoglossus koehleri (Caullery and Mesnil, 1900) Protoglossus taeniatum author unknown Ritteria Deland, Cameron, Rao, Ritter & Bullock, 2010 Ritteria ambigua Deland, Cameron, Rao, Ritter & Bullock, 2010 Saccoglossus Schimkewitsch, 1892 Saccoglossus apatensis Thomas, 1956 Saccoglossus aulakoeis Thomas, 1968 Saccoglossus borealis Okuda & Yamada, 1955 Saccoglossus bournei (Menon, 1904) Saccoglossus bromophenolosus King, Giray and Kornfield, 1994 Saccoglossus caraibicus (van der Horst, 1924) Saccoglossus gurneyi (Robinson, 1927) Saccoglossus horsti Brambell and Goodhart, 1941 Saccoglossus hwangtauensis Si & Kwang-Chung, 1935 Saccoglossus inhacensis van der Horst, 1934 Saccoglossus kowalevskii (Agassiz, 1873) Saccoglossus madrasensis Rao, 1957 Saccoglossus mereschkowskii (Wagner, 1885) Saccoglossus otagoensis (Benham, 1899) Saccoglossus pusillus (Ritter, 1902) Saccoglossus pygmaeus Hinrichs and Jacobi, 1938 Saccoglossus ruber Tattersall, 1905 Saccoglossus sulcatus (Spengel, 1893) Stereobalanus Spengel, 1901 Stereobalanus canadensis (Spengel, 1893) Stereobalanus willeyi Ritter, 1904 Xenopleura Gilchrist, 1925 Xenopleura vivipara Gilchrist, 1925