A new taxodiaceous seed cone from the oligocene of Washington

Cunninghamiostrobus goedertii is described as a new species based on permineralized seed cones from the Early Oligocene of Washington. The fossils come from the Makah Formation and were found on the northern shore of the Olympic Peninsula. The cone consists of numerous bract-scale complexes arranged...

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Bibliographic Details
Published in:American journal of botany 1989-01, Vol.76 (1), p.133-142
Main Authors: Miller, C.N, Crabtree, D.R
Format: Article
Language:English
Subjects:
ANATOMIA DE LA PLANTA
ANATOMIE VEGETALE
Botany
Bracts
Cell walls
CONE
CONES
CONOS
cunninghamiostrobus goedertii
Cylinders
DISTRIBUCION NATURAL
DISTRIBUTION NATURELLE
Earth sciences
Earth, ocean, space
Epidermal cells
Epithelial cells
Exact sciences and technology
Fossils
Genera
NATURAL DISTRIBUTION
New species
PALAEONTOLOGY
PALEOBOTANY
PALEONTOLOGIA
PALEONTOLOGIE
Paleontology
PLANT ANATOMY
Resin canals
Seed cones
Seeds
TAXA
TAXODIACEAE
TAXON
TAXONOMIA
TAXONOMIE
TAXONOMY
ULTRAESTRUCTURA
ULTRASTRUCTURE
WASHINGTON
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Description
Summary:Cunninghamiostrobus goedertii is described as a new species based on permineralized seed cones from the Early Oligocene of Washington. The fossils come from the Makah Formation and were found on the northern shore of the Olympic Peninsula. The cone consists of numerous bract-scale complexes arranged helically around a central axis. Each bract-scale complex has a large bract bearing a small flap of tissue adaxially that represents the ovuliferous scale. Up to three seeds were produced on each complex. The vascular trace to the bract-scale complex diverges from the vascular cylinder of the cone axis as a concentric strand. This divides in the outer cortex of the axis to form a large collateral bract tract abaxially and a minute scale trace adaxially. The latter continues outward to supply the ovuliferous scale. The bract trace divides, forming many strands outward which occur in a row with transfusion tissue between them. Many resin canals also occur in the bract. The new cone combines features found in modern cones of Athrotaxis, Cunninghamia, and Taiwania but is most similar to Cunninghamiostrobus yubariensis from the Late Cretaceous of Japan.
ISSN:0002-9122
1537-2197
DOI:10.1002/j.1537-2197.1989.tb11293.x