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Summary
| Description |
Harpactoxanthopsis quadrilobata from the Eocene of Italy (public display, Orton Geology Museum, Ohio State University, Columbus, Ohio, USA). Classification: Animalia, Arthropoda, Crustacea, Malacostraca, Eucarida, Decapoda, Brachyura, Xanthoidea, Xanthidae Stratigraphy: Castelgomberto Formation, Lutetian Stage, lower Middle Eocene Locality: Venetia Region, northern Italy Crabs (= brachyuran decapod crustaceans) are found in Jurassic to Holocene sedimentary rocks. Complete or near-complete specimens are scarce. They have a relatively shortened carapace, compared to lobsters and crayfish, and have the abdominal section of the body turned underneath & essentially fused with the carapace. Small to large claws (chelae) occur at the distal ends of the 1st pair of appendages. Decapods have 5 pairs of appendages - 10 in all - “decapod” means “ten-legged”. Most crabs are marine (oceanic), but some forms are freshwater or terrestrial. Their feeding habits range from predation to scavenging to algal grazing to filter feeding, etc. |
| Date | |
| Source | Harpactoxanthopsis quadrilobata fossil crab (Castelgomberto Formation, Middle Eocene, Venetia Region, northern Italy) |
| Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15114049337. It was reviewed on 20 September 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:25, 20 September 2014 | | 3,008 × 2,000 (3.11 MB) | Tillman | Transferred from Flickr via Flickr2commons |
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