anewmimotonidanminahuimammaliagliresfromthemiddlepaleoceneofqianshananhuichina

	anewmimotonidanminahuimammaliagliresfromthemiddlepaleoceneofqianshananhuichina
	Li Chuankui; Wang Yuanqing; Zhang Zhaoqun; Mao Fangyuan; Meng Jin
刊名	古脊椎动物学报
	2016
卷号	54 期号:02 页码:121
ISSN号	1000-3118
英文摘要	Here we report a new genus and species, Mina hui gen. et sp. nov., of basal Glires from the Middle Paleocene of Qianshan, Anhui, China. The new taxon is characterized by combination of the following characters: medium-sized mimotonidan; upper dental formula 2.0.3.3; dI2 transversely narrow and having smooth labial surface without longitudinal groove; M1 the largest cheek tooth and other cheek teeth decreasing in size considerably away from Ml so that the external margin of the upper cheek tooth row is distinctly arched labially; lingual side of upper molars unilaterally hypsodont and bearing no hypostria; hypocone being slightly distolingual to protocone; presence of a mesostyle; upper incisor with double-layered enamel structure; posterior border of anterior root of zygoma situated lateral to Ml-2 and infraorbital foramen positioned low. M. hui is one of the earliest known Glires, co-existing with Heomys and Mimotona in Qianshan geographically and Middle Paleocene (ca. 61 Ma) chronologically. We consider that the Mimotonida would include two families: the monotypic Mimotonidae that contains Mimotona and Mimolagidae that includes Mimolagus, Gomphos, Anatolimys, Mina and possibly A mar aleator. Among known mimotonidans, Mimotona probably represents a primitive “morphotype” as the ancestor of lagomorphs, whereas Mimolagidae includes a side branch diverged from the clade evolved toward lagomorphs. Future research may show that Mimolagidae is not a natural group, and may possibly submerge into Mimotonida, or involve more than one family-level clade. The occurrence of Heomys, Mimotona and Mina from Qianshan show that Glires had already diversified by the Middle Paleocene.
语种	英语
内容类型	期刊论文
源URL	[http://119.78.100.205/handle/311034/11719]
专题	中国科学院古脊椎动物与古人类研究所
作者单位	中国科学院古脊椎动物与古人类研究所
推荐引用方式 GB/T 7714	Li Chuankui,Wang Yuanqing,Zhang Zhaoqun,et al. anewmimotonidanminahuimammaliagliresfromthemiddlepaleoceneofqianshananhuichina[J]. 古脊椎动物学报,2016,54(02):121.
APA	Li Chuankui,Wang Yuanqing,Zhang Zhaoqun,Mao Fangyuan,&Meng Jin.(2016).anewmimotonidanminahuimammaliagliresfromthemiddlepaleoceneofqianshananhuichina.古脊椎动物学报,54(02),121.
MLA	Li Chuankui,et al."anewmimotonidanminahuimammaliagliresfromthemiddlepaleoceneofqianshananhuichina".古脊椎动物学报 54.02(2016):121.