Theridiidae (Spider) in Baltic Amber – 11.8mm Fossil Inclusion

Specifications

• Specimens: Theridiidae (Spider)
• Amber Size: 11.8 mm
• Age: Eocene Epoch (44–49 million years old)
• Locality: Juodkrantė, Lithuania
• Geological Material: Baltic Amber
• Display: Labeled case included
• Condition: Natural, no enhancements

This specimen contains a well-defined Theridiidae (spider) inclusion encased within genuine Baltic Amber formed during the Eocene Epoch (~44–49 Ma). Theridiidae represents one of the most diverse spider families, known today for intricate cobweb structures and a wide range of predatory behaviors. Their fossilized counterparts are key to understanding arachnid evolution, ecological stability, and predator-prey relations in ancient forest ecosystems.

Baltic amber from Juodkrantė, Lithuania, is esteemed for its extraordinary clarity and ability to preserve even the finest arachnid microstructures. Under magnification, this 11.8 mm amber specimen may reveal diagnostic features such as tarsal claws, body segmentation, pedipalps, and setae—traits that help researchers analyze Eocene biodiversity, web-building evolution, and morphological continuity through deep time.

Amber forms when sticky resin from prehistoric conifers traps small arthropods and hardens rapidly, sealing them off from decay. This unique fossilization process results in unparalleled preservation—something especially valuable for spiders, which are rarely fossilized in sedimentary environments.

This specimen is natural, unaltered, and scientifically valuable, professionally housed in a labeled display case for research or long-term curation.