Beberapa spesies telah diasumsikan hadir, tetapi karena kurangnya bukti fisik, mereka hanya dianggap sebagai spesies potensial. Spesies hipotetik biasanya diyakini punah. Spesies-spesies ini telah menyebabkan kebingungan, karena mereka daapt berupa spesies yang berbeda, subspesies, spesies pendatang, atau sebuah misidentifikasi.^[1] Istilah ini juga dapat merujuk kepada spesies yang dihipotesiskan telah hadir secara evolusioner.

Daftar ini belum tentu lengkap. Anda dapat membantu Wikipedia dengan mengembangkannya. (June 2022)

• Makaw albin
• Siskin arkansaw, Fringilla spaltria^[2]
• Barraband's mystery black-breasted twelve-wired bird-of-paradise
• Burung Washington, Haliaetus washingtoni^[2]
• Nuri-ara alis-biru
• Sylvia montana^[2]
• Lorius tibialis
• Makaw kuning-dan-hijau dominika, Ara atwoodi
• Sylvia carbonata^[2]
• Siraja cuvier, Regulus cuvieri^[2]
• Geoffroyus aureus
• Bayan guadeloupe, Amazona violacea
• Betet guadeloupe, Psittacara labati
• Kerabat hipotetik bayan rodrigues
• Gallus giganteus ("ayam jago")
• Makaw merah jamaika, Ara gossei
• Rakasa Leguat, Leguatia gigantea
• Makaw antilles kecil, Ara guadeloupensis
• Ketilang madeira, Goniaphea leucocephala
• Amazona martinicana
• Makaw martinik, Ara martinicus
• Angsa Meidum
• Sarcoramphus sacra/Sarcoramphus papa ssp.
• Jalak raiatea, Aplonis? ulietensis
• Makaw kepala-merah, Ara erythrocephala
• Drymodes superciliaris colcloughi
• Mandar-biru réunion, Porphyrio caerulescens
• Muscicapa minuta^[2]
• Angsa sushkin, Anser neglectus
• Mandar tahiti, Zapornia nigra
• Spiza townsendi
• Ketilang townsend, Emberiza townsendi^[2]
• Eos unicolor
• Betet jamaika tak teridentifikasi
• Zhenniao

• Proavis (partim)

• Serigala andes, Dasycyon hagenbecki
• Chilihueque, Lama araucana
• Gajah tiongkok, Elephas maximus rubridens
• Giraffa sahara^[3]
• Kallana
• Anjing laut leher-panjang, Phoca mutica
• Shrewdinger^[4][5]
• Celurut sonnerat, Diplomesodon sonnerati
• Kera laut steller, Simia marina
• Sumxu
• Populasi canidae punah tak teridentifikasi^[6][7]
• Waitoreke
• Zebro

• Gar pelangi abisal^[8]
• Bathysidus pentagrammus^[8]
• Bathysphaera intacta^[8]
• Bathyembryx istiophasma^[8]
• Bathyceratias trilynchnus^[8]

• Acarus crossi
• Battus polydamas antiquus
• Euploea rogeri
• Neptis guamensis
• Papilio antizox

• Thermozodium esakii
• Porpita prunella
• Salinella salve

• Palem kipas laysan, Pritchardia? sp
• Silphium

1. ^ Fuller, Errol (1987). Extinct Birds. Penguin Books (England). hlm. 131. ISBN 0-670-81787-2.
2. ^ ^{a b c d e f g} Lund, Nicholas (2015-09-14). "John James Audubon: Confused, Wrong, or Neither?". National Audubon Society.
3. ^ Solounias, Nikos (2022-09-27). Anatomy and Evolution of the Giraffe: Parts Unknown (PDF) (dalam bahasa Inggris). Cambridge Scholars Publishing. hlm. 1–6. ISBN 978-1-5275-8686-4. Diarsipkan dari asli (PDF) tanggal 2024-06-01.
4. ^ O'Leary, Maureen A.; Bloch, Jonathan I.; Flynn, John J.; Gaudin, Timothy J.; Giallombardo, Andres; Giannini, Norberto P.; Goldberg, Suzann L.; Kraatz, Brian P.; Luo, Zhe-Xi; Meng, Jin; Ni, Xijun; Novacek, Michael J.; Perini, Fernando A.; Randall, Zachary S.; Rougier, Guillermo W.; Sargis, Eric J.; Silcox, Mary T.; Simmons, Nancy B.; Spaulding, Michelle; Velazco, Paúl M.; Weksler, Marcelo; Wible, John R.; Cirranello, Andrea L. (2013). "The Placental Mammal Ancestor and the Post–K-Pg Radiation of Placentals". Science. 339 (6120): 662–667. Bibcode:2013Sci...339..662O. doi:10.1126/science.1229237. PMID 23393258.
5. ^ Eveleth, Rose (2013-04-08). "There Is Now a Hypothetical Species Named Shrewdinger Because of You". Smithsonian Magazine.
6. ^ Gopalakrishnan, Shyam; Sinding, Mikkel-Holger S.; Ramos-Madrigal, Jazmín; Niemann, Jonas; Samaniego Castruita, Jose A.; Vieira, Filipe G.; Carøe, Christian; Montero, Marc de Manuel; Kuderna, Lukas; Serres, Aitor; González-Basallote, Víctor Manuel; Liu, Yan-Hu; Wang, Guo-Dong; Marques-Bonet, Tomas; Mirarab, Siavash; Fernandes, Carlos; Gaubert, Philippe; Koepfli, Klaus-Peter; Budd, Jane; Rueness, Eli Knispel; Sillero, Claudio; Heide-Jørgensen, Mads Peter; Petersen, Bent; Sicheritz-Ponten, Thomas; Bachmann, Lutz; Wiig, Øystein; Hansen, Anders J.; Gilbert, M. Thomas P. (2018). "Interspecific Gene Flow Shaped the Evolution of the Genus Canis". Current Biology. 28 (21): 3441–3449.e5. Bibcode:2018CBio...28E3441G. doi:10.1016/j.cub.2018.08.041. PMC 6224481. PMID 30344120.
7. ^ Wang, Guo-Dong; Zhang, Ming; Wang, Xuan; Yang, Melinda A.; Cao, Peng; Liu, Feng; Lu, Heng; Feng, Xiaotian; Skoglund, Pontus; Wang, Lu; Fu, Qiaomei; Zhang, Ya-Ping (2019). "Genomic Approaches Reveal an Endemic Subpopulation of Gray Wolves in Southern China". iScience. 20: 110–118. Bibcode:2019iSci...20..110W. doi:10.1016/j.isci.2019.09.008. PMC 6817678. PMID 31563851.
8. ^ ^{a b c d e} Beebe, William (1934). Half Mile Down (PDF). New York: Harcourt, Brace and Company.