Lindwurmia (named after the Lindwurm) is a rhomaleosaurid plesiosaur from the Early Jurassic of Germany.

[1] It was discovered in the Psiloceras johnstoni ammonite subzone in the clay quarry of Thiemeke'shen Ziegelei in Halberstadt, Germany in 1899 by Johannes Maak, with the dragline excavator that hit upon the specimen partially destroying it in the process; Maak had the specimen restored by 1900 and it was subsequently sent to the Halberstadt City Museum.

[3] At an unknown point in time and without any prior scientific research, the Halberstadt City Museum had the specimen labeled as Eurycleidus arcuatus.

[1] In 2019, Peggy Vincent and Glenn William Storrs named and described the type species Lindwurmia thiuda for the specimen.

Vincent & Storrs (2019) found it to be the sister taxon to Anningasaura within Rhomaleosauridae.