幻龍屬目前已有約12個已命名種。模式種是N. mirabilis,化石發現於德國的殼灰岩階(Muschelkalk,歐洲地層單元,相當於安尼西階到拉丁尼階)地層,是在1834年由德國古動物學家Georg zu Münster所敘述、命名。同樣在1834年,Georg zu Münster命名了Paranothosaurus,化石發現於德國奧斯納布呂克縣,目前被改歸類於幻龍屬的一個種,巨型幻龍(N. giganteus)[2]。N. juvenilis的化石也發現於德國[3]。N. edingerae的化石發現於殼灰岩階上層與考依波階(Keuper,歐洲地層單元,相當於拉丁尼階到瑞替階)[4]。
N. jagisteus的化石發現於德國荷亨洛赫縣的殼灰岩階上層[5]。荷蘭溫特斯韋克更發現3種幻龍的化石,地質年代屬於殼灰岩階下層,包含:N. marchicus[6]、N. winterswijkensis[6]、溫特斯韋克幻龍(N. winkelhorsti)[7]。N. cymatosauroides的化石則發現於西班牙的殼灰岩階地層[8]。
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Rieppel, O.; and Hagdorn, H. Fossil reptiles from the Spanish Muschelkalk (mont-ral and alcover, province Tarragona). Historical Biology: An International Journal of Paleobiology. 1998, 13 (1): 77–97. 引文使用過時參數coauthors (幫助)
Rieppel, O.; Mazin, J.-M.; and Tchernov, E. Speciation along rifting continental margins: a new Nothosaur from the Negev (Israël). Comptes Rendus de l'Académie des Sciences Series IIA. 1997, 325 (12): 991–997. 引文使用過時參數coauthors (幫助)
Rieppel, O.; Mazin, J.-M.; and Tchernov, E. Sauropterygia from the Middle Triassic of Makhtesh Ramon, Negev, Israel. Fieldiana. 1999, 1 (40). 引文使用過時參數coauthors (幫助)
Jiang, W.; Maisch, M. W.; Hao, W.; Sun, Y.; and Sun, Z. Nothosaurus yangjuanensis n. sp. (Reptilia, Sauropterygia, Nothosauridae) from the middle Anisian (Middle Triassic) of Guizhou, southwestern China. NeuesJahrbuch für Geologie und Paläontologie, Monatshefte. 2006, 5: 257–276. 引文使用過時參數coauthors (幫助)
Rieppel, O.; and Wild, R. A revision of the genus Nothosaurus (Reptilia. Sauropterygia) from the Germanic Triassic with comments on the status of Conchiosaurus clavatus. Fieldiana. 1996, 1 (34): 1–82. 引文使用過時參數coauthors (幫助)
書目
Dixon, Dougal (2006). The Complete Book of Dinosaurs. Hermes House.
Haines, Tim, and Paul Chambers. The Complete Guide to Prehistoric Life. Pg. 64. Canada: Firefly Books Ltd., 2006