Lagenanectes richterae was named by Sachs et al. (2017) [The following characters are considered to be unique and potential autapomorphies: (1) the alveolar part strongly expands laterally at the symphysis and bears rostral-most alveoli that are situated in the lateral margin of the dentary; and (2) wedge-shaped ventral platform at the mandibular symphysis that bears prominent pits on the ventral side. Furthermore, a unique combination of characters is present: five premaxillary teeth, with the first tooth being small and second to fourth teeth being very prominent; rostrum broadly rounded in dorsal view; vaulted margins of the premaxillary and maxillary alveoli; heterodont maxillary dentition; two notochordal grooves on the condylus occipitalis; vomers caudally separated by rostral extension of pterygoids; deep notochordal pit in articular face of axis vertebra; amphicoelous craniad cervicals; cervical articular facets lacking a ventral notch; and craniad cervicals with short lateral longitudinal ridge.]. Its type specimen is BGR Ma 13328, a partial skeleton (incomplete skull, comprising parts of both premaxillae, maxillae, ?prefrontal, quadrates, vomers, palatines, pterygoids, parasphenoid, basisphenoid, basioccipit), and it is a 3D body fossil. Its type locality is Moorberg claypit, Sarstedt, which is in a Hauterivian marine claystone in the Stadthagen Formation of Germany.