RARE FOSSIL PADDLEFISH. ...

Description

RARE FOSSIL PADDLEFISH
Crossopholis magnicandatus
Eocene
Green River Formation, Wyoming, USA
From the abundant formation of the "Fossil Lake" at Green River in Wyoming, the Paddlefish is the rarest described fish species, and is usually represented by incomplete specimens. Crossopholis is a distant relative to the modern paddlefish, Polyodon spathula, and are largely unossified, consisting mainly of cartilage and notochordal tissue. As such, they are rarely fossilized unless immediately and completely covered by a layer of silt, otherwise the cartilage and organic tissue that comprises much of their anatomy decomposes far too rapidly to be preserved. The paddlefish species are filter feeders, straining zooplankton (Leptodora kindtii) out of the water with fine filaments called gill rakers. These are located in the gill arches found inside their mouths, an anatomical feature predominant in the species. The present fossil displays rare preservation of elements of this filter-feeding system, in the form of the star-shaped patterning that lines the snout. Elsewhere, the bones are preserved with an excellent degree of three-dimensionality, and where the fine structure of the fins has been lost, sympathetic restoration completes this superb specimen, which measures an enormous 43¾ inches long on a natural matrix 52 x 25¾ inches, framed and ready for hanging.

*Heritage Auctions strives to provide as much information as possible but encourages in-person inspection by bidders. Statements regarding the condition of objects are only for general guidance and should not be relied upon as complete statements of fact, and do not constitute a representation, warranty or assumption of liability by Heritage. Some condition issues may not be noted in the condition report but are apparent in the provided photos which are considered part of the condition report. Please note that we do not de-frame lots estimated at $1,000 or less and may not be able to provide additional details for lots valued under $500. Heritage does not guarantee the condition of frames and shall not be liable for any damage/scratches to frames, glass/acrylic coverings, original boxes, display accessories, or art that has slipped in frames. All lots are sold "AS IS" under the Terms & Conditions of Auction.