| Dolichorhynchops Temporal range: Late Cretaceous,
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| D. osborni, National Museum of Natural History, Washington D. C. | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Superorder: | †Sauropterygia |
| Order: | †Plesiosauria |
| Family: | †Polycotylidae |
| Clade: | †Dolichorhynchia |
| Genus: | †Dolichorhynchops Williston, 1902 |
| Type species | |
| †Dolichorhynchops osborni Williston, 1902
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| Other species | |
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Dolichorhynchops is an extinct genus of polycotylid plesiosaur from the Late Cretaceous of North America, containing the species D. osborni and D. herschelensis, with two previous species having been assigned to new genera.[1] Definitive specimens of D. osborni have been found in the late Coniacian to early Campanian rocks, while those of D. herschelensis have been found in the late Campanian to early Maastrichtian rocks. Dolichorhynchops was a prehistoric marine reptile measuring around 3 metres (9.8 ft) long. Its Greek generic name means "long-nosed face".