Thaumasioscolex didelphidis n. gen., n. sp. (Eucestoda: Proteocephalidae) from the black-eared opossum Didelphis marsupialis from Mexico, the first proteocephalidean tapeworm from a mammal. Journal of Parasitology, 87(3), June 2001: 639-646. 639 [Zoological Record Volume 137]