Acirsa annectens A. W. B. Powell, 1951 accepted as Gregorioiscala annectens (Powell, 1951) (original description)
Admete consobrina Powell, 1951 accepted as Nothoadmete consobrina (Powell, 1951) (original description)
Amauropsis (Kerguelenatica) Powell, 1951 accepted as Kerguelenatica Powell, 1951 (original description)
Antimargarita Powell, 1951 (original description)
Antitrichotropis Powell, 1951 accepted as Torellia Jeffreys, 1867 (original description)
Belalora Powell, 1951 (original description)
Belalora thielei Powell, 1951 (original description)
Belaturricula Powell, 1951 (original description)
Brookula pfefferi Powell, 1951 (original description)
Brookula strebeli Powell, 1951 (original description)
Cavineptunea Powell, 1951 (original description)
Cavineptunea monstrosa Powell, 1951 (original description)
Chlanidota paucispiralis Powell, 1951 (original description)
Chlanidota pilosa Powell, 1951 (original description)
Chlanidota signeyana Powell, 1951 (original description)
Colpospirella Powell, 1951 accepted as Turritella Lamarck, 1799 (original description)
Colpospirella algida (Melvill & Standen, 1912) accepted as Turritella algida Melvill & Standen, 1912 (basis of record)
Conorbela Powell, 1951 (original description)
Discotrichoconcha Powell, 1951 (original description)
Discotrichoconcha cornea Powell, 1951 (original description)
Falsilunatia Powell, 1951 (original description)
Falsimargarita Powell, 1951 (original description)
Falsimohnia Powell, 1951 (original description)
Icoplax punicea (Gould, 1846) accepted as Callochiton puniceus (Gould, 1846) (basis of record)
Kaitoa scaphandroides Powell, 1951 (original description)
Laevilacunaria Powell, 1951 (original description)
Laevilacunaria (Pellilacunella) Powell, 1951 accepted as Laevilitorina (Pellilacunella) Powell, 1951 represented as Laevilitorina Pfeffer, 1886 (original description)
Laevilacunaria (Pellilacunella) bennetti (Preston, 1916) accepted as Laevilacunaria bennetti (Preston, 1916) (basis of record)
Laevilitorina (Corneolitorina) Powell, 1951 accepted as Laevilitorina (Laevilitorina) Pfeffer, 1886 represented as Laevilitorina Pfeffer, 1886 (original description)
Leptocollonia Powell, 1951 (original description)
Leptocollonia thielei Powell, 1951 (original description)
Leucosyrinx falklandica Powell, 1951 accepted as Antarctospira falklandica (Powell, 1951) (original description)
Leucosyrinx paragenota Powell, 1951 accepted as Bela angusteplicata Strebel, 1905 accepted as Antarctospira angusteplicata (Strebel, 1905) (original description)
Leucosyrinx paratenoceras Powell, 1951 accepted as Typhlodaphne paratenoceras (Powell, 1951) (original description)
Lorabela Powell, 1951 (original description)
Margarella bouvetia Powell, 1951 (original description)
Margarella jason Powell, 1951 (original description)
Margarella porcellana Powell, 1951 (original description)
Margarella tropidophoroides obsoleta Powell, 1951 accepted as Margarella obsoleta Powell, 1951 (original description)
Miomelon scoresbyanum A. W. B. Powell, 1951 accepted as Pachycymbiola scoresbyana (Powell, 1951) (original description)
Notoficula problematica Powell, 1951 accepted as Parficulina problematica (Powell, 1951) (original description)
Paradmete percarinata Powell, 1951 (original description)
Pareuthria venustula Powell, 1951 (original description)
Parvaplustrum Powell, 1951 (original description)
Parvaplustrum tenerum Powell, 1951 (original description)
Philine falklandica Powell, 1951 accepted as Antarctophiline falklandica (Powell, 1951) (original description)
Photinastoma Powell, 1951 (original description)
Pleurotomella anomalapex Powell, 1951 (original description)
Polinices patagonicus (Philippi, 1845) accepted as Falsilunatia patagonica (Philippi, 1845) (basis of record)
Probuccinum angulatum Powell, 1951 (original description)
Probuccinum delicatulum Powell, 1951 (original description)
Proneptunea duplicarinata Powell, 1951 (original description)
Proneptunea fenestrata Powell, 1951 (original description)
Prosipho perversus Powell, 1951 accepted as Antistreptus perversus (Powell, 1951) (original description)
Prosiphoninae Powell, 1951 accepted as Prosiphonidae Powell, 1951 (original description)
Sinuber Powell, 1951 (original description)
Sinuber sculptum scotianum Powell, 1951 (original description)
Solariella kempi Powell, 1951 (original description)
Solariellinae Powell, 1951 accepted as Solariellidae Powell, 1951 (original description)
Terenochiton kerguelensis (Haddon, 1886) accepted as Leptochiton kerguelensis Haddon, 1886 (basis of record)
Trochita georgiana A. W. B. Powell, 1951 accepted as Trochita pileolus (d'Orbigny, 1841) (original description)
Tromina bella Powell, 1951 accepted as Falsitromina bella (Powell, 1951) (original description)
Tromina fenestrata Powell, 1951 accepted as Falsitromina fenestrata (Powell, 1951) (original description)
Tromina simplex Powell, 1951 accepted as Falsitromina simplex (Powell, 1951) (original description)
Tromina tricarinata Powell, 1951 accepted as Falsitromina tricarinata (Powell, 1951) (original description)
Trophon (Fuegotrophon) Powell, 1951 accepted as Fuegotrophon Powell, 1951 (original description)
Trophon (Stramonitrophon) Powell, 1951 accepted as Trophon Montfort, 1810 (original description)
Trophon cuspidarioides Powell, 1951 accepted as Enixotrophon cuspidarioides (Powell, 1951) (original description)
Trophon echinolamellatus Powell, 1951 accepted as Trophonella echinolamellata (Powell, 1951) (original description)
Trophon poirieria Powell, 1951 accepted as Enixotrophon poirieria (Powell, 1951) (original description)
Trophon scotianus Powell, 1951 accepted as Trophonella scotiana (Powell, 1951) (original description)
Trophon shackletoni paucilamellatus Powell, 1951 accepted as Trophon paucilamellatus Powell, 1951 (original description)
Tropidomarga Powell, 1951 (original description)
Tropidomarga biangulata Powell, 1951 (original description)
Turritellopsis thielei Powell, 1951 (original description)
Typhlodaphne Powell, 1951 (original description)
Typhlodaphne strebeli Powell, 1951 (original description)
Venustatrochus Powell, 1951 (original description)
Venustatrochus georgianus Powell, 1951 (original description)
Xymenopsis Powell, 1951 (original description)
Xymenopsis albidus (Philippi, 1846) accepted as Xymenopsis buccineus (Lamarck, 1816) (basis of record)

Antarctic Peninsula for Discotrichoconcha cornea Powell, 1951 
Antarctica for Trophon echinolamellatus Powell, 1951 
Falkland Islands for Parvaplustrum tenerum Powell, 1951 
Falkland Islands for Philine falklandica Powell, 1951 
South Georgia for Cavineptunea monstrosa Powell, 1951 
South Georgia for Leptocollonia thielei Powell, 1951 
South Georgia for Tropidomarga biangulata Powell, 1951 
South Georgia for Venustatrochus georgianus Powell, 1951