ToL-Reviewed

Eohiodon woodruffigroup is extinct

Guo-Qing Li and Mark V. H. Wilson
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Containing group: Eohiodon

Introduction

†Eohiodon woodruffi was originally discovered in the Klondike Mountain Formation near Republic, Washington. The holotype is deposited in the collection of the Laboratory for Vertebrate Paleontology, University of Alberta, Canada. The species has since been found in the Fossil Butte Member of the Green River Formation, Lincoln County, Wyoming, USA and in the Horsefly beds near Horsefly, British Columbia, Canada (Li, Wilson, and Grande, 1997). All known occurrences are of Eocene age. The largest specimen thus far known is UALVP 31948, which has a total length of 217mm (see the title figure of this page).

Characteristics

†Eohiodon woodruffi differs from †E. rosei in having:
  1. An anteriorly slender maxillary bone.
  2. A dorsally and posteriorly excavated operclar bone.
  3. Total vertebrae = 46-50 (Precaudal vertebrae 23-24, Caudal vertebrae 23-26).
  4. Principal dorsal-fin rays = 12-14.
  5. Dorsal pterygiophores = 14-17.
  6. Principal anal-fin rays = 16-24.
  7. Anal-fin pterygiophores = 17-25.

References

Li G.-Q. Mark V. H. Wilson, and L. Grande. 1997. Review of Eohiodon (Teleostei: Osteoglossomorpha) from western North America, with a phylogenetic reassessment of Hiodontidae. Journal of PALEONTOLOGY, 71: 1109-1124.

Wilson, M. V. H. 1978. Eohiodon woodruffi n. sp. (Teleostei, Hiodontidae) from the middle Eocene Klondike Mountain Formation near Republic, Washington. Canadian Journal of Earth Sciences, 15:679-686.

Title Illustrations
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Scientific Name Eohiodon woodruffi
Location Horsefly beds, British Columbia, Canada
Specimen Condition Fossil
Size total length of 217mm
Copyright © 1998 Guo-Qing Li and Mark V. H. Wilson
About This Page

Guo-Qing Li
Chinese Academy of Sciences, Beijing , China

Mark V. H. Wilson
University of Alberta, Edmonton, Alberta, Canada

Correspondence regarding this page should be directed to Guo-Qing Li at guoqingli5310@hotmail.com and Mark V. H. Wilson at mark.wilson@ualberta.ca

All Rights Reserved.

Citing this page:

Li, Guo-Qing and Mark V. H. Wilson. 1998. Eohiodon woodruffi. Version 01 January 1998. http://tolweb.org/Eohiodon_woodruffi/15142/1998.01.01 in The Tree of Life Web Project, http://tolweb.org/

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