Lancanjiangosaurus
Encyclopedia
"Lancanjiangosaurus" is the informal name given to an as yet undescribed genus
of sauropod dinosaur
from the Middle Jurassic
. The "type species
", "L. cachuensis", was coined by Zhou in 1985, but remains a nomen nudum
. It is known from the Dapuka Group
of Tibet
. As the name has been undescribed for so long, the remains may have been named something else by now.
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of sauropod dinosaur
Dinosaur
Dinosaurs are a diverse group of animals of the clade and superorder Dinosauria. They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period until the end of the Cretaceous , when the Cretaceous–Paleogene extinction event led to the extinction of...
from the Middle Jurassic
Middle Jurassic
The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from 176-161 million years ago. In European lithostratigraphy, rocks of this Middle Jurassic age are called the Dogger....
. The "type species
Type species
In biological nomenclature, a type species is both a concept and a practical system which is used in the classification and nomenclature of animals and plants. The value of a "type species" lies in the fact that it makes clear what is meant by a particular genus name. A type species is the species...
", "L. cachuensis", was coined by Zhou in 1985, but remains a nomen nudum
Nomen nudum
The phrase nomen nudum is a Latin term, meaning "naked name", used in taxonomy...
. It is known from the Dapuka Group
Dapuka Group
The Dapuka Group is a geological formation in Asia. It dates back to the Middle Jurassic.-Vertebrate fauna:...
of Tibet
Tibet
Tibet is a plateau region in Asia, north-east of the Himalayas. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpas, Qiang, and Lhobas, and is now also inhabited by considerable numbers of Han and Hui people...
. As the name has been undescribed for so long, the remains may have been named something else by now.