Zygogynum poratum

Name

Zygogynum poratum

Rank

Species

Original spelling

poratus

Generic Name

[Genus] Zygogynum

Authors (Name)

Liang X.-Q. Zhou Z.-K.  

Authors (Pub.)

Liang X.-Q. Lu P. Zhang J.-W. Su T. Zhou Z.-K.  

Publication

First fossils of Zygogynum from the Middle Miocene of Central Yunnan, Southwest China, and their palaeobiogeographic significance [2018/5]

Journal

Palaeoworld

Volume

27

Issue

3

Page number

401

Year

2018

Fossil Status

leaves

Stratigraphy

Miocene

Strat. comment

Sanhaogou Formation (Dajie Formation)

Location

Sanzhangtian village, Zhenyuan County, Yunnan Province, China

Paleoregion

Eurasia (China)

Data for Holotypus

Repository

Palaeoecological Laboratory, Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, CAS, Mengla, China

Repository Number

SZT-2-50

Num

Fig. 3B

Pub.

First fossils of Zygogynum from the Middle Miocene of Central Yunnan, Southwest China, and their palaeobiogeographic significance [2018/5]

Data for Paratypus

Repository

Palaeoecological Laboratory, Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, CAS, Mengla, China

Repository Number

SZT-2-51 (Fig. 3A), SZT-2-52 (Fig. 3C)

Num

Fig. 3A, Fig. 3C

Pub.

First fossils of Zygogynum from the Middle Miocene of Central Yunnan, Southwest China, and their palaeobiogeographic significance [2018/5]

Diagnosis

Leaves oblanceolate and petiolate, base cuneate, apex acute. Margin entire. Venation pinnate with brochidodromous secondary veins. Midvein sunken adaxial surface. Adaxial surface glabrous. Abaxial epidermis with sparsely short unicellular hairs. Adaxial epidermis with grooved anticlinal flanges. Stomata paracytic, sunken in lower epidermis and plugged. Many papillae and pores in unspecialized cells of abaxial sur-face.