- Labeceras
- Laboceras
- Labyrinthoceras
- Laganoclymenia
- Lagowites
- Lambericeras
- Lanceolites
- Lanceoloboceras
- Laqueoceras
- Latanarcestes
- Latisageceras
- Laugeites
- Lecanites
- Lechites
- Lecointriceras
- Leconteiceras
- Leconteites
- Leeites
- Lehmaniceras
- Leioceras
- Leiophyllites
- Leislingites
- Lemuroceras
- Lenotropites
- Lenticeras
- Lenticoceltites
- Leopoldia
- Leptaleoceras
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- Leptechioceras
- Lepthoplites
- Leptoceras
- Leptonotoceras
- Leptosphinctes
- Leptotetragonites
- Leukadiella
- Lewesiceras
- Lewyites
- Leymeriella
- Liardites
- Libycoceras
- Lilloetia
- Limaites
- Linguaclymenia
- Linguatornoceras
- Lingyunites
- Lioceratoides
- Liosphinctes
- Liparoceras
- Lipuites
- Lissoceras
- Lissoceratoides
- Lissoclymenia
- Lissonia
- Lissonites
- Lithacoceras
- Lithacosphinctes
- Lithancylus
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- Lobites
- Lobobactrites
- Lobokosmokeras
- Lobolytoceras
- Lobosphinctes
- Lobotornoceras
- Loczyceras
- Lomonossovella
- Longaeviceras
- Longobardites
- Longobarditoides
- Lopholobites
- Lorioloceras
- Lotzeites
- Ludwigia
- Lunuloceras
- Lupherites
- Luppovella
- Lusitanites
- Lycetticeras
- Lyelliceras
- Lyrogoniatites
- Lytheoceras
- Lyticoceras
- Lytoceras
- Lytocrioceras
- Lytodiscoides
- Lytogyroceras
- Lytohoplites
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