Acanthancora Topsent, 1927 (original description)
Acanthancora clavatancora Topsent, 1927 accepted as
Pseudohalichondria clavatancora (Topsent, 1927) (original description)
Acantheurypon Topsent, 1927 (original description)
Acantheurypon scabiosum Topsent, 1927 accepted as
Eurypon scabiosum (Topsent, 1927) (original description)
Alloscleria Topsent, 1927 (original description)
Anisocrella Topsent, 1927 (original description)
Anisocrella hymedesmina Topsent, 1927 (original description)
Astylinifer Topsent, 1927 accepted as
Acheliderma Topsent, 1892 (original description)
Astylinifer planus Topsent, 1927 accepted as
Acheliderma planum (Topsent, 1927) (original description)
Bathydorus servatus Topsent, 1927 (original description)
Cladocroce osculosa Topsent, 1927 (original description)
Clinolabis Topsent, 1927 accepted as
Forcepia (Leptolabis) Topsent, 1901 (original description)
Clinolabis dentifera Topsent, 1927 accepted as
Forcepia (Leptolabis) dentifera (Topsent, 1927) (original description)
Coelosphaera (Histodermion) Topsent, 1927 (original description)
Craniella nimia Topsent, 1927 accepted as
Tetilla nimia (Topsent, 1927) (original description)
Crellastrina Topsent, 1927 (original description)
Echinostylinos Topsent, 1927 (original description)
Echinostylinos reticulatus Topsent, 1927 (original description)
Erylus expletus Topsent, 1927 (original description)
Erylus papillatus Topsent, 1927 (original description)
Gellius binarius Topsent, 1927 accepted as
Haliclona (Gellius) binaria (Topsent, 1927) (original description)
Gellius tener Topsent, 1927 accepted as
Haliclona (Gellius) emilei Van Soest & Hooper, 2020 (original description)
Halicnemia duplex Topsent, 1927 accepted as
Paratimea duplex (Topsent, 1927) (original description)
Histodermion Topsent, 1927 accepted as
Coelosphaera (Histodermion) Topsent, 1927 (original description)
Histodermion dividuum Topsent, 1927 accepted as
Coelosphaera (Histodermion) dividuum (Topsent, 1927) (original description)
Hymesigmia Topsent, 1927 accepted as
Hymenancora Lundbeck, 1910 (original description)
Hymesigmia japycina Topsent, 1927 accepted as
Hymenancora japycina (Topsent, 1927) (original description)
Latrunculia multirotalis Topsent, 1927 represented as
Latrunpagoda multirotalis (Topsent, 1927) (original description)
Leptosia sirventi Topsent, 1927 accepted as
Hymenancora sirventi (Topsent, 1927) (original description)
Leptosiopsis Topsent, 1927 accepted as
Hymenancora Lundbeck, 1910 (original description)
Leptosiopsis inaequalis Topsent, 1927 accepted as
Hymenancora inaequalis (Topsent, 1927) (original description)
Mycalopsis Topsent, 1927 accepted as
Esperiopsis Carter, 1882 (original description)
Mycalopsis radiata Topsent, 1927 accepted as
Esperiopsis radiata (Topsent, 1927) (original description)
Onychomyxilla Topsent, 1927 accepted as
Stelodoryx Topsent, 1904 (original description)
Onychomyxilla pectinata (Topsent, 1890) accepted as
Stelodoryx pectinata (Topsent, 1890) (source of synonymy)
Oopsacas Topsent, 1927 (original description)
Oopsacas minuta Topsent, 1927 (original description)
Plakina brachylopha Topsent, 1927 (original description)
Plakinastrella trunculifera Topsent, 1927 (original description)
Plocamiancora Topsent, 1927 (original description)
Plocamiancora denticulata Topsent, 1927 (original description)
Plocamione Topsent, 1927 (original description)
Plocamione dirrhopalina Topsent, 1927 (original description)
Plocamionida Topsent, 1927 (original description)
Rhabderemia fascicularis Topsent, 1927 (original description)
Rhabderemia mutans Topsent, 1927 (original description)
Suberites hirsutus Topsent, 1927 (original description)
Yvesia dispar Topsent, 1927 accepted as
Crella (Yvesia) dispar (Topsent, 1927) (original description)