Lagis koreni – synonym of Pectinaria koreni
Laodice cruciata – synonym of Cosmetira pilosella
Laodicea stauroglypha – synonym of Cosmetira pilosella
Laomedea tenuis – synonym of Phialella quadrata
Lar sabellarum – synonym of Proboscidactyla stellata
Lebbeus orthorhynchus – synonym of Lebbeus polaris
Lensia conoidea – synonym of Lensia conoidea
Lensia hotspur – synonym of Lensia hotspur
Lensia truncata – synonym of Lensia conoidea
Lepas aurita – synonym of Conchoderma auritum
Lepas virgata – synonym of Conchoderma virgatum
Leptocaris slabberi – synonym of Mesopodopsis slabberi
Leptomysis marioni – synonym of Leptomysis lingvura
Leptomysis pontica – synonym of Leptomysis lingvura
Leptomysis sardica – synonym of Leptomysis lingvura
Leucon cercaria – synonym of Pseudocuma longicornis
Leucon emarginatus – synonym of Eudorella emarginata
Limacina balea – synonym of Limacina retroversa balea
Limacina lesueuri var. alta – synonym of Limacina lesueuri
Limacina lesueuri var. depressa – synonym of Limacina lesueuri
Limacina lesueuri var. minor – synonym of Limacina lesueuri
Limacina retroversa retroversa
Limax lanceolatus – synonym of Branchiostoma lanceolatum
Limnorea norvegica – synonym of Podocoryne borealis
Liriopsis campanulatus – synonym of Eutima gegenbauri
Lizzia claparedei – synonym of Lizzia blondina
Lizzia grata – synonym of Rathkea octopunctata
Lizzia shimiko – synonym of Rathkea octopunctata
Loligo (Alloteuthis) media – synonym of Alloteuthis medius
Loligo (Alloteuthis) subulata – synonym of Alloteuthis subulatus
Loligo banksi – synonym of Onychoteuthis banksii
Loligo bartramiÊ – synonym of Ommastrephes bartramii
Loligo brogniartiiÊ – synonym of Illex coindetti
Loligo coindetiiÊ – synonym of Illex coindetti
Loligo eblanaeÊ – synonym of Todaropsis eblanae
Loligo marmorae – synonym of Alloteuthis medius
Loligo media – synonym of Alloteuthis medius
Loligo pillaeÊ – synonym of Illex coindetti
Loligo sagittataÊ – synonym of Illex coindetti
Loligo sagittataÊ – synonym of Todaropsis eblanae
Loligo sagittatusÊ – synonym of Todarodes sagittatus
Loligo subulata – synonym of Alloteuthis subulatus
Loligo todarusÊ – synonym of Todarodes sagittatus
Lophogaster serratus – synonym of Lophogaster typicus
Luidia africana – synonym of Luidia sarsi
Luidia fragilissima – synonym of Luidia ciliaris
Lymnorea borealis – synonym of Podocoryne borealis
Lysiosquilla eusebia – synonym of Platysquilla eusebia