Barathrobius Danielssen, 1887 accepted as Gersemia von Marenzeller, 1878 (original description)
Barathrobius digitatus Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)
Barathrobius palmatus Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)
Clavularia frigida Danielssen, 1887 (original description)
Drifa Danielssen, 1887 (original description)
Drifa hyalina Danielssen, 1887 accepted as Drifa glomerata (Verrill, 1869) (original description)
Drifa islandica Danielssen, 1887 accepted as Drifa glomerata (Verrill, 1869) (original description)
Duva arborescens Danielssen, 1887 accepted as Duva multiflora (Verrill, 1879) (original description)
Duva aurantiaca Danielssen, 1887 accepted as Duva multiflora (Verrill, 1879) (original description)
Duva cinerea Danielssen, 1887 accepted as Duva multiflora (Verrill, 1879) (original description)
Duva flava Danielssen, 1887 accepted as Duva multiflora (Verrill, 1879) (original description)
Duva frigida Danielssen, 1887 accepted as Duva multiflora (Verrill, 1879) (original description)
Duva glacialis Danielssen, 1887 accepted as Duva multiflora (Verrill, 1879) (original description)
Duva spitsbergensis Danielssen, 1887 accepted as Duva multiflora (Verrill, 1879) (original description)
Duva violacea Danielssen, 1887 accepted as Duva multiflora (Verrill, 1879) (original description)
Fulla Danielssen, 1887 accepted as Gersemia von Marenzeller, 1878 (original description)
Fulla schiertzi Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)
Gersemiopsis Danielssen, 1887 accepted as Gersemia von Marenzeller, 1878 (original description)
Gersemiopsis arctica Danielssen, 1887 accepted as Drifa glomerata (Verrill, 1869) (original description)
Krystallofanes Danielssen, 1887 accepted as Gersemia von Marenzeller, 1878 (original description)
Krystallofanes polaris Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)
Nannodendron Danielssen, 1887 accepted as Gersemia von Marenzeller, 1878 (original description)
Nannodendron elegans Danielssen, 1887 accepted as Gersemia rubiformis (Ehrenberg, 1834) (original description)
Nephthya flavescens Danielssen, 1887 accepted as Drifa glomerata (Verrill, 1869) (original description)
Nephthya polaris Danielssen, 1887 accepted as Drifa glomerata (Verrill, 1869) (original description)
Nephthya rosea Danielssen, 1887 accepted as Drifa glomerata (Verrill, 1869) (original description)
Nidalia arctica Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)
Organidus Danielssen, 1887 accepted as Gersemia von Marenzeller, 1878 (original description)
Organidus nordenskjoldi Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)
Sarakka Danielssen, 1887 accepted as Gersemia von Marenzeller, 1878 (original description)
Sarakka crassa Danielssen, 1887 accepted as Gersemia crassa (Danielssen, 1887) (original description)
Sympodium abyssorum Danielssen, 1887 (original description)
Voeringia Danielssen, 1887 accepted as Gersemia von Marenzeller, 1878 (original description)
Voeringia abyssicola Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)
Voeringia capitata Danielssen, 1887 accepted as Gersemia clavata (Danielssen, 1887) (original description)
Voeringia clavata Danielssen, 1887 accepted as Gersemia clavata (Danielssen, 1887) (original description)
Voeringia dryopsis Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)
Voeringia fruticosa (Sars, 1860) accepted as Gersemia fruticosa (Sars, 1860) (new combination reference)
Voeringia jan-mayeni Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)
Voeringia mirabilis Danielssen, 1887 accepted as Gersemia mirabilis (Danielssen, 1887) (original description)
Voeringia polaris Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)
Voeringia pygmaea Danielssen, 1887 accepted as Gersemia fruticosa (Sars, 1860) (original description)