Aalenian

174.7–170.9 million years ago Middle Jurassic

174.7–170.9 million years ago

Middle Jurassic stages

The genera whose type species is known from the Aalenian. A genus known from several stages appears on the page of each.

Genera known from the Aalenian

Asfaltovenator Rauhut & Pol, 2019 AllosauroideaToarcian–Bajocian (184.2–168.2 Ma)Argentinaunder dispute
Ceratocaudia Natarajan et al., 2026 MacronariaToarcian–Bajocian (184.2–168.2 Ma)India
Condorraptor Rauhut, 2005 PiatnitzkysauridaeAalenian–Bajocian (174.7–168.2 Ma)Argentina
Eoabelisaurus Pol & Rauhut, 2012 CeratosauriaAalenian–Bajocian (174.7–168.2 Ma)Argentinaunder dispute
Eomamenchisaurus Lü et al., 2008 MamenchisauridaeAalenian–Bathonian (174.7–165.3 Ma)China
Isanosaurus Buffetaut et al., 2000 SauropodaNorian–Tithonian (227.3–143.1 Ma)Thailandunder dispute
Lingwulong Xu et al., 2018 DicraeosauridaeToarcian–Bajocian (184.2–168.2 Ma)China
Nebulasaurus Xing, 2013 EusauropodaAalenian–Bajocian (174.7–168.2 Ma)China
Perijasaurus Rincón et al., 2022 EusauropodaToarcian–Aalenian (184.2–170.9 Ma)Colombia
Piatnitzkysaurus Bonaparte, 1979 PiatnitzkysauridaeAalenian–Bajocian (174.7–168.2 Ma)Argentina
Sanxiasaurus Li et al., 2021 NeornithischiaToarcian–Aalenian (184.2–170.9 Ma)China
Yantaloong Zhang et al., 2026 EusauropodaAalenian–Bathonian (174.7–165.3 Ma)Chinaunder dispute
Yuanmouraptor Zou et al., 2025 MetriacanthosauridaeAalenian–Bajocian (174.7–168.2 Ma)China
Yuanmousaurus Lü et al., 2006 MamenchisauridaeAalenian–Bathonian (174.7–165.3 Ma)China
Yunyangosaurus Dai et al., 2020 TetanuraeToarcian–Aalenian (184.2–170.9 Ma)Chinaunder dispute
Zizhongosaurus Dong et al., 1983 SauropodaToarcian–Bajocian (184.2–168.2 Ma)China