"[2] Libonectes was an elasmosaurid plesiosaur, with many specimens unearthed in southern parts of North America[3]- as a result, it was labeled with such a name as described in the preceding sentence.

Charles Gill Morgan is credited with the acquiring and preparation of the first Libonectes fossils, found by tenant farmer T.W.

[4] Libonectes was a medium-sized plesiosaur, with the complete specimen (SMNK-PAL 3978) measuring 7.2 metres (24 ft) long.

[6] The animal was very similar to the related Thalassomedon, though the structure of the neck vertebrae was different, with taller neural spines and longer supporting processes of the bone, and its nostrils were slightly closer to the tip of the skull.

A shoulder girdle and flippers were also found but were apparently discarded at some point atter 1962,[1] along with the rear fourteen neck vertebrae of which only forty-eight remain.