''Yimaia'' is a extinct genus of
Ginkgoalean tree, and the
only member of the family Yimaiaceae. In botanical
form classification, its a
form taxon for ginkgoalean
ovulate organs. ''Yimaia'' species are distinguished from other Ginkgoales by the presence of "Ovulate organs consisting of a
peduncle and up to eight or nine terminal, sessile, contiguous and orthotropous (straight, upright and with a micropyle at apex) ovules." The ovules are associated with leaves of either ''
Baiera'' or ''
Ginkgoites'' leaf morphospecies. Fossils have been found in
Middle Jurassic deposits in
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's List of countries and dependencies by population, most populous country, with a Population of China, population exceeding 1.4 billion, slig ...
.
Species
* ''Yimaia capituliformis''
Zhou, Zheng and Zhang, 2006 Daohugou Bed
The Haifanggou Formation (), also known as the Jiulongshan Formation (), is a fossil-bearing rock deposit located near Daohugou () village of Ningcheng County, in Inner Mongolia, northeastern China.
The formation consists of coarse conglomerate ...
, China,
Callovian Associated with leaves of ''Ginkgoites'' type
*''Yimaia qinghaiensis''
Wu, Yang and Zhou, 2006 Shimengou Formation,
Qinghai
Qinghai (; alternately romanized as Tsinghai, Ch'inghai), also known as Kokonor, is a landlocked province in the northwest of the People's Republic of China. It is the fourth largest province of China by area and has the third smallest po ...
, China,
Middle Jurassic Associated with leaves of ''Baiera furcata'' type.
* ''Yimaia recurva'' (type)
Zhou et Zhang, 1988 Yima Formation,
Henan
Henan (; or ; ; alternatively Honan) is a landlocked province of China, in the central part of the country. Henan is often referred to as Zhongyuan or Zhongzhou (), which literally means "central plain" or "midland", although the name is a ...
, China,
Middle Jurassic
References
{{Taxonbar, from=Q2600332
Ginkgophyta