Anaperus gardineri (Graff, 1911) accepted as Thalassoanaperus gardineri (Graff, 1911) (basis of record)
Aphanostoma sanguineum Beklemischev, 1915 accepted as Pseudactinoposthia sanguineum (Beklemischev, 1915) (basis of record)
Astrotorhynchus bifidus (McIntosh, 1874) Graff, 1905 (additional source)
Cirrifera cirrifera Sopott, 1972 (additional source)
Coelogynopora erotica Riser, 1981 (additional source)
Coelogynopora schulzii Meixner, 1938 (basis of record)
Conaperta hortulus Hooge & Tyler, 2003 accepted as Isodiametra hortulus (Hooge & Tyler, 2003) accepted as Praeconvoluta hortulus (Hooge & Tyler, 2003) (basis of record)
Discocelides ellipsoides (Girard in Stimpson, 1854) accepted as Plehnia ellipsoides (Girard in Stimpson, 1854) (additional source)
Foviella affinis (Ørsted, 1843) (additional source)
Leptoplana ellipsoides Girard in Stimpson, 1854 accepted as Plehnia ellipsoides (Girard in Stimpson, 1854) (basis of record)
Leptoplana variabilis (Girard, 1850) accepted as Pleioplana atomata (Müller OF, 1776) accepted as Notoplana atomata (Müller OF, 1776) (basis of record)
Notoplana atomata (Müller OF, 1776) (additional source)
Otocelis sandara Hooge & Tyler, 2003 (basis of record)
Paedomecynostomum bruneum Dörjes, 1968 (additional source)
Paramacrostomum tricladoides Riedel, 1932 (basis of record)
Philocelis brueggemanni Hooge & Tyler, 2003 (basis of record)
Praeaphanostoma wadsworthi Hooge & Tyler, 2003 (basis of record)
Praeconvoluta tigrina Hooge & Tyler, 2003 (basis of record)
Praeconvoluta tornuva Tyler & Hooge, 1999 (basis of record)
Procerodes littoralis (Strøm, 1768) (additional source)
Trigonoporus folium (Verrill, 1873) (basis of record)

Cobscook Bay for Alaurina composita Metschnikoff, 1861 
Cobscook Bay for Anaperus gardineri (Graff, 1911) 
Cobscook Bay for Aphanostoma sanguineum Beklemischev, 1915 
Cobscook Bay for Astrotorhynchus bifidus (McIntosh, 1874) Graff, 1905 
Cobscook Bay for Cirrifera cirrifera Sopott, 1972 
Cobscook Bay for Coelogynopora erotica Riser, 1981 
Cobscook Bay for Coelogynopora schultzii Meixner, 1938 
Cobscook Bay for Coelogynopora schulzii Meixner, 1938 
Cobscook Bay for Conaperta hortulus Hooge & Tyler, 2003 
Cobscook Bay for Discocelides ellipsoides (Girard in Stimpson, 1854) 
Cobscook Bay for Foviella affinis (Ørsted, 1843) 
Cobscook Bay for Leptoplana ellipsoides Girard in Stimpson, 1854 
Cobscook Bay for Leptoplana variabilis (Girard, 1850) 
Cobscook Bay for Notoplana atomata (Müller OF, 1776) 
Cobscook Bay for Otocelis sandara Hooge & Tyler, 2003 
Cobscook Bay for Paedomecynostomum bruneum Dörjes, 1968 
Cobscook Bay for Paramacrostomum tricladoides Riedel, 1932 
Cobscook Bay for Philocelis brueggemanni Hooge & Tyler, 2003 
Cobscook Bay for Praeaphanostoma wadsworthi Hooge & Tyler, 2003 
Cobscook Bay for Praeconvoluta tigrina Hooge & Tyler, 2003 
Cobscook Bay for Praeconvoluta tornuva Tyler & Hooge, 1999 
Cobscook Bay for Procerodes littoralis (Strøm, 1768) 
Cobscook Bay for Trigonoporus folium (Verrill, 1873)