ANNOTATED SYSTEMATIC LIST OF 



NORTH ATLANTIC GENERA AND SPECIES OF 



ACOELA AND NEMERTODERMATIDA 



Species listed here include: 1) species reported in the literature 

 or collected by the author in the area, and 2) genera and species 

 that may be expected in this area because of their occurrence in 

 the North Sea, the North Atlantic Ocean, or adjacent areas. 

 Since the fauna here is as yet poorly described, it is felt to be 

 most useful to include as many of the species and genera likely 

 to be encountered as possible. Synonyms likely to be encoun- 

 tered in the literature are also included. Most of the doubtful 

 species I have omitted altogether. 



The list is arranged systematically in families as in Dorjes 

 (1968a) with the new family Antroposthiidae Faubel added at 

 the end. Genera are arranged alphabetically within the families 

 and species alphabetically within the genera. Geographic 

 distribution and habitat are indicated for each species. Asterisks 

 indicate species for which 1 have records or which have been 

 reported in the literature from the northeast coast of North 

 America. 



Ordpr ACOELA 



FamUy PROPORIDAE Graff, 1852 



Genus Archiproporus An der Lan, 1936 



Archiproporus minimus = Proporus minimus according to 

 Westblad (1945), but see comment under 4 (3) in key. 



Genus Proporus O. Schmidt, 1882 



Proporus brochii Westblad, 1945. Sweden, Norway. 1(X)- 

 150 m. 



Proporus lonchitis Dorjes, \91\. Norway. 50-200 m. 



Proporus minimus (An der Lan, 1936). Norway, Greenland. 

 200-300 m. 



Proporus rubropunctatus O. Schmidt, 1852 = Otocelis rubro- 

 punclata. 



Proporus venenosus (O. Schmidt, 1852). British Isles, 

 Mediterranean Sea, Black Sea. Subtidal. Includes sub- 

 species: P. V. venenosus Graff, 1904, P. v. violaceus Graff, 

 1882, and P. v. viridiflavus Riedl, 1959. 



Genus Schizoporus O. Schmidl, 1852 



Only one species S. venenosus = Proporus venenosus. 



Family CONVOLUTIDAE Graff, 1904 



Genus Adenopea moved to Family ANTROPOSTHIIDAE 



Genus Amphkhoerus Graff, 1891 = Amphiscolops 



Genus Amphiscolops Graff, 1904 



Amphiscolops bermudensis Hyman, 1939. Bermuda. On 



seaweeds. 

 Amphiscolops cinereus (Graff, 1874). North Atlantic, 



Mediterranean Sea. On algae. 



'Amphiscolops gardineri Graff, 1910. Graff listed this in his 

 first report on American Turbellaria, but later (1911) erected 

 the new genus Anaperus for it. 

 Amphiscolops langerhansi (Graff, 1882). North Atlantic, 

 Mediterranean. Tide pools, rocky shores. A species identi- 

 fied as this (?) was collected on algae at Virginia Key, Fla. 

 Amphiscolops sargassi Hyman, 1939. Bermuda, Brazil. On 



seaweeds. 

 Amphiscolops virescens Orsted, 1845 = Aphanosioma 

 virescens. 



Genus Aphanostoma Orsted, 1845 



Many species assigned to this genus have been shuffled back 

 and forth several times. I have followed Dorjes (1968a) as to 

 their disposition in the following list. 



Aphanostoma album Dorjes, 1968. North Sea. From 



muddy sand. 

 *1 Aphanostoma aurantiacum Verrill, 1892. Newport, 



R.I. Listed as a doubtful species by various authors and 



not definitely identified since. 

 Aphanostoma auritum (M. S. Schultze, 1851) = Mecynosto- 



nium auritum. 

 Aphanostoma caudatum (An der Lan, 1936) = Actinoposthia 



caudata. 

 Aphanostoma divaceum Verrill, 1892. Listed by Dorjes 



(1968a) as a doubtful species. Probably a typographical error 



on A. olivaceum. 

 *Aphanostoma diversicolor Orsted, 1845 = Paramecynosto- 



mum diversicolor. 

 Aphanostoma elegans Jensen, 1878. Northern Europe. On 



algae. 

 Aphanostoma lutheri Westblad, 1946 = Pelophila lutheri. 

 Aphanostoma macrobursalis Westblad, 1946 = Pseudmecyno- 



stomum macrobursalium. 

 Aphanostoma macrospiriferum Westblad, 1946 = Archa- 



phanostoma macrospiriferum . 

 Aphanostoma minimum Westblad, 1946 = Haplogonaria 



minima. 

 *1 Aphanostoma olivaceum Verrill, 1892. Provincetown, 



Mass. Listed as a doubtful species by Graff (1911) and not 



reported since. Not found in my collections made there. 

 Aphanostoma rhomboides Jensen, 1878. Some references to 



this are really to Archaphanostoma agile (see Db'rjes 1968a: 



85, 157). 

 Aphanostoma rubropunctata (O. Schmidt, 1852) = Otocelis 



rubropunctata. 

 Aphanostoma tenuissimum Westblad, 1946 = Proaphanosto- 



ma tenuissima. 

 Aphanostoma virescens (Orsted, 1845). North Atlantic from 



White Sea to Greenland. 



Genus .Archaphanostoma Dorjes, 1968 



Archaphanostoma agile (Jensen, 1878). North Sea, North 

 Atlantic to Greenland. Common in tide pools and in inter- 

 tidal zone. 



Archaphanostoma histobursalium Dorjes, 1968. North Sea. 

 From muddy sand. 



Archaphanostoma macrospiriferum (Westblad, 1946). North 

 Sea. On soft bottom, 15-30 m. 



58 



