Umaltolepis zhoui

Name

Umaltolepis zhoui

Rank

Species

Generic Name

[Genus] Umaltolepis

Authors (Pub.)

Dong C. Shi G.-L. Zhang X.-Q. Wang Z.-X. Wang Y.-D.  

Publication

Middle-Late Jurassic fossils from Northeast China confirm the affiliation of Umaltolepis seed-bearing structure and Pseudotorellia leaves [2022/8]

Journal

Review of Palaeobotany and Palynology

Volume

306

Issue

104763

Page number

2

Year

2022

Fossil Status

reproductive organs (seed)

Stratigraphy

Oxfordian

Strat. comment

Haifanggou Formation

Location

Daohugou village (41°19′25″ N, 119°14′40″ E), Ningcheng County, Inner Mongolia Autonomous Region, Northeast P.R. China

Paleoregion

Eurasia (China)

Data for Holotypus

Repository

Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China

Repository Number

PB23880

Num

Plate I, 1, Plate II, 1, 2

Pub.

Middle-Late Jurassic fossils from Northeast China confirm the affiliation of Umaltolepis seed-bearing structure and Pseudotorellia leaves [2022/8]

Diagnosis

Short shootswith alternating pseudo-whorls of persistent bud scales and abscission scars. Each pseudo-whorl consisting of 6 to 8 bud scales and 6 to 8 abscission scars. Persistent bud scale triangular, with an acute apex; abscission scar rhomboidal. Short shoot bearing seed-bearing structure at the apex. Seed-bearing structure consisting of cylindrical stalk bearing an umbrella-like, four-lobed cupule with a slender central column at the tip. The stalk having a prominent cup-like flange surrounding the base of cupule. Cupule ovate to elliptical in outline, with an acute apex, dehiscent below into four ovate lobes. Lobes commonly with a semicircular distal notch. Cuticle of lobes thick, with sparse and scattered, longitudinally oriented stomata, and epidermal cells arranged in short, discontinuous longitudinal rows. Stoma with 2 sunken guard cells surrounded by 3–4 specialized lateral subsidiary cells and 2 unspecialized polar cells. Epidermal cells elongated, with straight anticlinal walls and more or less oblique end walls. Elongated or small fusiform-shaped resin bodies present in cupule lobes.