''Kwangsisaurus'' is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

of a

basal Basal or basilar is a term meaning ''base'', ''bottom'', or ''minimum''. Science * Basal (anatomy), an anatomical term of location for features associated with the base of an organism or structure * Basal (medicine), a minimal level that is nec ...

pistosauroid known from the Early or

Middle Triassic In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided in chronostratigraphy. The Middle Triassic spans the time between Ma ...

(

Olenekian In the geologic timescale, the Olenekian is an age in the Early Triassic epoch; in chronostratigraphy, it is a stage in the Lower Triassic series. It spans the time between Ma and Ma (million years ago). The Olenekian is sometimes divid ...

Anisian In the geologic timescale, the Anisian is the lower stage or earliest age of the Middle Triassic series or epoch and lasted from million years ago until million years ago. The Anisian Age succeeds the Olenekian Age (part of the Lower Trias ...

age) of Guangxi, southern China. It contains a single species, ''Kwangsisaurus orientalis''.

Discovery

''Kwangsisaurus'' is known solely from the

holotype A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of seve ...

IVPP V2338, a fragmentary postcranial

skeleton A skeleton is the structural frame that supports the body of an animal. There are several types of skeletons, including the exoskeleton, which is the stable outer shell of an organism, the endoskeleton, which forms the support structure inside ...

housed at the

Institute of Vertebrate Paleontology and Paleoanthropology The Institute of Vertebrate Paleontology and Paleoanthropology (IVPP; ) of China is a research institution and collections repository for fossils, including many dinosaur and pterosaur specimens (many from the Yixian Formation). As its name sugges ...

. The skeleton consists of 20 back vertebrae, six front-most tail vertebrae, badly persevered shoulder girdle, and the right forelimb. Yang misoriented the specimen, mistaking the neck for a tail and the shoulder for a pelvis. IVPP V2338 was collected at Fupingtun, Dengilu of Wuming,

Guangxi Province Guangxi (; ; alternately romanized as Kwanghsi; ; za, Gvangjsih, italics=yes), officially the Guangxi Zhuang Autonomous Region (GZAR), is an autonomous region of the People's Republic of China, located in South China and bordering Vietnam ...

, from the

Beisi Formation The Achaemenid Empire or Achaemenian Empire (; peo, 𐎧𐏁𐏂, , ), also called the First Persian Empire, was an ancient Iranian empire founded by Cyrus the Great in 550 BC. Based in Western Asia, it was contemporarily the largest emp ...

of the Loulou Group. Its dating is uncertain, but falls within the

stage of the late

Early Triassic The Early Triassic is the first of three epochs of the Triassic Period of the geologic timescale. It spans the time between Ma and Ma (million years ago). Rocks from this epoch are collectively known as the Lower Triassic Series, which is a ...

or early

. A second species, ''K. lusiensis'', named by Young in 1978 based on IVPP RV 100 and collected at Luxi,

Yunnan Province Yunnan , () is a landlocked province in the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is Kunming. The province borders the C ...

from the

Falang Formation Farang ( fa, فرنگ) is a Persian (and Southeast Asian) word that originally referred to the Franks (the major Germanic tribe) and later came to refer to White Europeans in general. The word "Farang" is a cognate and originates from Old F ...

, was removed from the genus and is now considered to be related to '' Lariosaurus''.

Etymology

''Kwangsisaurus'' was first described and named by

Yang Zhongjian Yang Zhongjian, also Yang Chung-chien (; 1 June 1897 – 15 January 1979), courtesy name Keqiang (), also known as C.C. (Chung Chien) Young, was a Chinese paleontologist and zoologist. He was one of China's foremost vertebrate paleontologists. ...

, also known as Chung-Chien Young, in

1965 Events January–February * January 14 – The Prime Minister of Northern Ireland and the Taoiseach of the Republic of Ireland meet for the first time in 43 years. * January 20 ** Lyndon B. Johnson is Second inauguration of Lyndo ...

and the

type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen( ...

is ''Kwangsisaurus orientalis''. The generic name is derived from ''Kwangsi'', an alternative spelling of the former province Guangxi, where the holotype was found, and from

Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...

''sauros'', meaning "lizard", a common suffix for genus names of extinct reptile. The specific name ''orientalis'' is

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power ...

for "of the east", as an emphasis on the east-Asian occurrence of ''Kwangsisaurus'' whose relatives were known from Europe and the Middle East at the time of its discovery.

References

Pistosaurs Triassic sauropterygians Early Triassic reptiles of Asia Middle Triassic reptiles of Asia Fossil taxa described in 1965 Taxa named by Yang Zhongjian Anisian life Sauropterygian genera {{triassic-reptile-stub