Stutzeliastrobus foliatus

Name

Stutzeliastrobus foliatus

Rank

Species

Generic Name

[Genus] Stutzeliastrobus

Authors (Pub.)

Herrera F. Shi G.-L. Knopf P. Leslie A. B. Ichinnorov N. Takahashi M. Crane P. R. Herendeen P. S.  

Publication

Cupressaceae conifers from the Early Cretaceous of Mongolia [2016/11]

Journal

International Journal of Plant Sciences

Volume

178

Issue

1

Page number

27

Year

2016

Fossil Status

cones (female)

Stratigraphy

Aptian

Strat. comment

Tevshiin Govi Formation

Location

Tevshiin Govi coal mine, central Mongolia

Paleoregion

Eurasia (Asia)

Data for Holotypus

Repository

Field Museum, Chicago, USA

Repository Number

PP56130

Num

4A

Pub.

Cupressaceae conifers from the Early Cretaceous of Mongolia [2016/11]

Data for Paratypus

Repository

Field Museum, Chicago, USA

Repository Number

PP56116,PP56117,PP56123,PP56129,PP56132, PP56133, PP56144, PP56149, PP56153

Num

3A, 4B–4H, 6A

Pub.

Cupressaceae conifers from the Early Cretaceous of Mongolia [2016/11]

Diagnosis

As for the genus with the following additions: Leaves appressed, dorsiventrally flattened, sessile and slightly decurrent. Leaf apices ranging from acute, to convex, to falcate with a short spinelike tip. Fibers absent within the leaf mesophyll. Leaf epidermis well developed and composed of thick-walled isodiametric cells. Stomatal complexes well defined, ovate to elliptical in outline, crowded, and irregularly oriented. Guard cells sunken, elliptical in outline, surrounded by a ring of four to six subsidiary cells. Polar subsidiary cells depressed relative to the level of the other subsidiary and guard cells as seen from the inner cuticular surface. Subsidiary cells lacking cuticular thickenings or papillae on the inner cuticle surface. Seed cones ca. 7.0–32 mm long, ca. 6.0–15 mm wide, variable in lateral outline, ranging from elliptical, to ovate, to oblong, to obovate. Bract-scale complexes borne approximately at right angles to the cone axis proximally but more acute distally. Bracts ca. 4.0–7.0 mm long, ca. 2.0–5.0 mm wide, and ca. 227–264 mm thick. Branching resin canal system absent in the bract-scale complex. Seed bodies slightly flattened to ellipsoidal, bilaterally symmetrical to symmetrical, obovate, or slightly reniform in outline. Seed size, including the wing, ca. 4.0–6.0 mm long, 1.0–3.0 mm wide. No interseminal ridges between adjacent seeds.