to the museum until 1974. After his death in 1991, it was discovered that the specimen was missing and may have been stolen or sold.

The Haarlem Specimen (TM 6428/29, also known as the Teylers Specimen) was discovered in 1855 near italics=unset, Germany, and described as a Pterodactylus crassipes in 1857 by Meyer. It was reclassified in 1970 by John Ostrom and is currently located at the Teylers Museum in Haarlem,