Lebachia lockardii

Name

Lebachia lockardii

Rank

Species

Generic Name

[Genus] Lebachia

Authors (Pub.)

Mapes G. Rothwell G. W.  

Publication

Permineralized ovulate cones of Lebachia from late Palaeozoic limestones of Kansas [1984/1]

Journal

Palaeontology

Volume

27

Issue

1

Page number

72

Year

1984

Parent Taxon

[Genus] Lebachia

Fossil Status

strobili (female)

Stratigraphy

Cisuralian

Location

Hamilton quarries; NW quarter, sec. 5 and 8, T.24S., R. 12E., Virgil seven and a half foot quadrangle, Greenwood County, Kansas, U.S.A.

Paleoregion

Laurussia (Laurentia)

Data for Holotypus

Repository

Ohio State University, Department of Botany, Paleobotanical Collections, Columbus, USA

Repository Number

Specimen M26, slides and peels 3834-3851; 3867-3912; 3968-4092; 4267

Diagnosis

Ovulate cones, averaging 5 0 cm long x 1-5 cm wide, borne as single terminal units on vegetative axes with helically arranged simple or bifid leaves. Cones comprised of primary axis with helically arranged bifid bracts and axillary fertile shoots. Fertile shoots bearing twenty-five to thirty sterile scales and one to two fertile scales (rarely three to five) positioned adjacent to primary axis. One terminal inverted ovule per fertile scale. Ovules bilaterally symmetrical and winged, with rounded or cordate base and attenuated micropyle. Nucellus free from integument distal to chalaza. Simple pollen chamber with nucellar beak; often containing Potonieisporites grains. Stomata with five to nine unipapillate subsidiary cells. Adaxial leaf structure with stomata in two parallel bands, each four to eight stomata wide with some shared subsidiary cells; single bands or isolated rows of stomata occurring on some leaves. Abaxial cuticles papillate and less stomatiferous. Unicellular hairs common at margins of leaves and bracts.