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Description

Fossil Fish Pair
Mioplosus sp.
Eocene
Green River Formation
Wyoming, USA
9.33 x 5.43 x 1.07 inches (23.70 x 13.80 x 2.71 cm)

This light tan limestone matrix presents a striking pair of fossil fish preserved in sharp contrast against the surrounding stone. Both specimens belong to the extinct predatory genus Mioplosus, a swift freshwater hunter of the Green River Formation, and display confident body outlines with well-defined fins and powerful tail structures. Measuring approximately 5 inches (13 cm) and 5.30 inches (13.5 cm) in length, the fish are generously sized and beautifully positioned, creating a dynamic and visually engaging composition across the plate. Subtle surface texture and natural color variation within the matrix enhance the presentation while allowing the fossils to remain the focal point. This compelling dual specimen captures the alert, streamlined form of Mioplosus and offers an excellent example of the dramatic preservation for which Green River fish are renowned.


Estimate: $300 - up.

Condition Report*: Condition report available upon request.
*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.

Auction Info

Proxy Bidding Ends 
January
29th Thursday 7:50 pm CT
Auction Dates
January
29th Thursday
Proxy Bidding Time Remaining 
1 Day 14h 9m 47s
Internet/Mail Bids: 5
Lot Tracking Activity: 14
Page Views: 74

Buyer's Premium per Lot:
25% of the successful bid (minimum $49) per lot.

This lot is in: 1 - Nature & Science Session
(Lots 80001-80059) - 8:00 PM Central Time, Thursday, January 29, 2026.
[Proxy bidding ends ten minutes prior to the session start time. Live Proxy bidding on Heritage Live now starts within 2 hours of when the auction opens for proxy bidding and continues through the live session.]

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