Atriolum bucinum Kott, 2001 (original description)
Atriolum eversum Kott, 2001 (original description)
Atriolum lilium Kott, 2001 (original description)
Atriolum marinense Kott, 2001 (original description)
Atriolum robustum Kott, 1983 (additional source)
Atriolum tubiporum Kott, 2001 (original description)
Clitella Kott, 2001 (original description)
Clitella nutricula Kott, 2001 (original description)
Didemnum albopunctatum Sluiter, 1909 (additional source)
Didemnum arancium Kott, 2001 (original description)
Didemnum astrum Kott, 2001 (original description)
Didemnum bicolor Kott, 2001 accepted as Didemnum pica Brunetti, 2007 (original description)
Didemnum bisectatum Kott, 2001 (original description)
Didemnum caesium Sluiter, 1909 (additional source)
Didemnum clavum Kott, 2001 (original description)
Didemnum complexum Kott, 2001 (original description)
Didemnum crescente Kott, 2001 (original description)
Didemnum cygnuus Kott, 2001 (original description)
Didemnum delectum Kott, 2001 (original description)
Didemnum effusium Kott, 2001 (original description)
Didemnum elongatum Sluiter, 1909 (additional source)
Didemnum fragile Sluiter, 1909 (basis of record)
Didemnum fragum Kott, 2001 (original description)
Didemnum fucatum Sluiter, 1909 (additional source)
Didemnum fuscum (Oka, 1931) (additional source)
Didemnum grande (Herdman, 1886) (basis of record)
Didemnum granulatum Tokioka, 1954 (additional source)
Didemnum guttatum Monniot F. & Monniot C., 1996 (additional source)
Didemnum herba Kott, 2001 (original description)
Didemnum hiopaa Monniot C. & Monniot F., 1987 (additional source)
Didemnum incanum (Herdman, 1899) (basis of record)
Didemnum inveteratum Kott, 2001 (original description)
Didemnum jedanense Sluiter, 1909 (additional source)
Didemnum jucundum Kott, 2001 (original description)
Didemnum lacertosum Monniot F., 1995 (additional source)
Didemnum levitas Kott, 2001 (original description)
Didemnum linatum Kott, 2001 (original description)
Didemnum lissoclinum Kott, 2001 (original description)
Didemnum macrosiphonium Kott, 2001 (original description)
Didemnum mantile Kott, 2001 (original description)
Didemnum membranaceum Sluiter, 1909 (additional source)
Didemnum microthoracicum Kott, 2001 (original description)
Didemnum minisculum Kott, 2001 (original description)
Didemnum molle (Herdman, 1886) (additional source)
Didemnum monile Kott, 2001 (original description)
Didemnum moseleyi (Herdman, 1886) (basis of record)
Didemnum multispirale Kott, 2001 (original description)
Didemnum oblitum Kott, 2001 (original description)
Didemnum ossium Kott, 2001 (original description)
Didemnum parancium Kott, 2001 (original description)
Didemnum patulum (Herdman, 1899) (basis of record)
Didemnum pecten Kott, 2001 (original description)
Didemnum pellucidum Kott, 2001 (original description)
Didemnum perplexum Kott, 2001 (original description)
Didemnum pica Brunetti, 2007 (original description)
Didemnum poecilomorpha Monniot F. & Monniot C., 1996 (additional source)
Didemnum precocinum Kott, 2001 (original description)
Didemnum roberti Michaelsen, 1930 (additional source)
Didemnum scopi Kott, 2001 (original description)
Didemnum sordidum Kott, 2001 (original description)
Didemnum spadix Kott, 2001 (original description)
Didemnum stragulum Kott, 2001 (original description)
Didemnum sucosum Kott, 2001 (original description)
Didemnum tabulatum Sluiter, 1909 (additional source)
Didemnum ternerratum Kott, 2001 (original description)
Didemnum theca Kott, 2001 (original description)
Didemnum tonga (Herdman, 1886) (basis of record)
Didemnum uturoa Monniot C. & Monniot F., 1987 (additional source)
Didemnum vahatuio Monniot C. & Monniot F., 1987 (additional source)
Didemnum verdantum Kott, 2001 (original description)
Didemnum via Kott, 2001 (original description)
Didemnum viride (Herdman, 1906) (basis of record)
Didemnum vulgare Kott, 2001 (original description)
Diplosoma listerianum (Milne Edwards, 1841) (additional source)
Diplosoma simile (Sluiter, 1909) (basis of record)
Diplosoma translucidum (Hartmeyer, 1909) (basis of record)
Diplosoma velatum Kott, 2001 (original description)
Diplosoma virens (Hartmeyer, 1909) (basis of record)
Leptoclinides aciculus Kott, 2001 (original description)
Leptoclinides albamaculatus Kott, 2001 (original description)
Leptoclinides brandi Kott, 2001 (original description)
Leptoclinides caelestis Kott, 2001 (original description)
Leptoclinides carduus Kott, 2001 (original description)
Leptoclinides cavernosus Kott, 2001 (original description)
Leptoclinides coelenteratus (Kott, 1962) (basis of record)
Leptoclinides comitus Kott, 2001 (original description)
Leptoclinides compactus Kott, 2001 (original description)
Leptoclinides confirmatus Kott, 2001 (original description)
Leptoclinides constellatus Kott, 2001 (original description)
Leptoclinides cuspidatus (Sluiter, 1909) (basis of record)
Leptoclinides dubius (Sluiter, 1909) (basis of record)
Leptoclinides durus Kott, 2001 (original description)
Leptoclinides echinus Kott, 2001 (original description)
Leptoclinides erinaceus Kott, 2001 (original description)
Leptoclinides exiguus Kott, 2001 (original description)
Leptoclinides imperfectus (Kott, 1962) (basis of record)
Leptoclinides kingi Michaelsen, 1930 (additional source)
Leptoclinides levitatus Kott, 2001 (original description)
Leptoclinides lissus Hastings, 1931 (additional source)
Leptoclinides longicollis Kott, 2001 (original description)