Oclloa cesariana

Name

Oclloa cesariana

Rank

Species

Generic Name

[Genus] Oclloa

Authors (Pub.)

Erwin D. M. Pfefferkorn H. W. Alleman V.  

Publication

Early seed plants in the Southern Hemisphere I [1994/1]

Journal

Review of Palaeobotany and Palynology

Volume

80

Issue

1–2

Page number

22

Year

1994

Fossil Status

insynangescences (wih ovules)

Stratigraphy

Mississippian

Strat. comment

Ambo Group: Visean-Serpukhovian

Location

Subunit 19.8 of the La Mina section on the Paracas Peninsula [UTM, Zone 18, 3-57-800E, 84-61-200N], 11 km SSW from Paracas, Peru

Paleoregion

Gondwana (South America)

Data for Holotypus

Repository

Museo de Historia Natural "Vera Alleman Haeghebaert" (URP), Universidad Ricardo Palma, Lima, Peru

Repository Number

specimen No. RPT-90-51B (Plate I, I, 2; Plate II, 1); RPT-90-51A (counterpart)

Num

Plate I, I, 2; Plate II, 1

Pub.

Early seed plants in the Southern Hemisphere I [1994/1]

Data for Paratypus

Repository

Museo de Historia Natural "Vera Alleman Haeghebaert" (URP), Universidad Ricardo Palma, Lima, Peru

Repository Number

partial cast of seed, RPT-90-36 (Plate I, 3); compressed megasporangium, RPT-90-39B (Plate I, 4); compressed seed, RPT-90-51B (S1) (Plate I, 5, 8); compression/cast of seed, RPT-90-42B (Plate I, 6); compressed seed, RPT-90-43A (Plate I, 7); compression/cast of seed, RPT-91-309A (Plate I, 11); compression/cast of seed, RPT-91-24A (Plate II, 2); compressed seed, RPT-91-70E 5 (Plate II, 3). Specimens not figured: compressed seeds, RPT-90-43B, RPT-90-47, RPT-90-53, RPT-91-24B, RPT-91-26, RPT-91-39A, B, RPT-91-258, RPT-91-269A, B, RPT-91-275A, B; RPT-91-313A; megasporangia, RPT-90-39A, RPT-91-41A

Num

Plate I, 3, 4, 5, 6, 7, 8, 11; Plate II, 2, 3

Pub.

Early seed plants in the Southern Hemisphere I [1994/1]

Diagnosis

First-order axis five times forked, 6 cm long and 2 mm wide basally, becoming progressively shorter and narrower between successive forks, intervals between forks, 2.0, 1.5, 1.0, and 0.7 cm. Distally, second-order axes become shorter, narrower, and less branched, bearing alternately arranged third-order axes. Most complete fertile second-order axis two times forked, 4.5 cm long and 2 mm wide basally, narrowing to 0.6-0.8 mm before terminating in a single ovule. Attached ovule 9.0 mm long, dispersed seeds typically up to 11.0 mm long and 2.5-4.0 mm wide. Integument with smooth outer surface, lobe margins and inner surface (?) with minute projections ca. 0.3 mm long; lobes from level of separation 4.0-5.5mm long and 0.4-0.8 mm wide tapering to blunt tip, triangular (?) in cross section. Nucellus 5.0-6.0 mm long and 2.0-2.3 mm wide.