Hydrophilus under black light
Composite image of Hydrophilus under normal and black light
Hydrophilus under normal light
Close up of Hydrophilus under black light
Close up of Cybister under black light
Hydrophilus under black light
Composite image of Hydrophilus under normal and black light
Hydrophilus under normal light
Close up of Hydrophilus under black light
Close up of Cybister under black light

Hydrophilus sp. and Cybister sp.

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Vendor: Fossil Soup

SKU Number: SQ7837865

2 beautiful predaceous water beetles from the Pleistocene tar pit deposits of Rancho La Brea, LA County, Southern California.

The 2 beetles present are - The larger: Hydrophilus sp and the smaller: Cybister sp.

The Hydrophilus is around 3.0 cm and the Cybister around 2.8 cm.

These deposits are composed of a bitumin, pitch matrix of oil impregnated sands that formed as long as 38000 years ago. The beetles would predate on any unfortunate animal that became trapped in the tar.

Interestingly, these beetles flouresce under black light. This may be a function of the agents used to consolidate the matrix or due to some other reason that we are unable to discern (See the photo gallery).

Full dimensions are listed below.

Vendor: Fossil Soup

SKU Number: SQ7837865

2 beautiful predaceous water beetles from the Pleistocene tar pit deposits of Rancho La Brea, LA County, Southern California.

The 2 beetles present are - The larger: Hydrophilus sp and the smaller: Cybister sp.

The Hydrophilus is around 3.0 cm and the Cybister around 2.8 cm.

These deposits are composed of a bitumin, pitch matrix of oil impregnated sands that formed as long as 38000 years ago. The beetles would predate on any unfortunate animal that became trapped in the tar.

Interestingly, these beetles flouresce under black light. This may be a function of the agents used to consolidate the matrix or due to some other reason that we are unable to discern (See the photo gallery).

Full dimensions are listed below.

Specimen Details
Genus Name: Hydrophilus sp. Order /: Family Coleoptera / Hydrophilidae Age: Pleistocene Locality: LA County, California Formation: La Brea Tar Pits
Specimen Details
Genus Name: Cybister sp. Order /: Family Coleoptera / Dytiscidae Age: Pleistocene Locality: LA County, California Formation: La Brea Tar Pits
Matrix Dimensions
Dimensions: In Centimeters Length: 8.00 cm Width: 6.50 cm Height: 3.00 cm Weight: N/A
Specimen Dimensions
Dimensions: In Centimeters Length: 3.00 cm Width: 1.60 cm Height: Negligible 0.50 cm: N/A
Specimen Dimensions
Dimensions: In Centimeters Length: 2.80 cm Width: 1.60 cm Height: 0.50 cm Weight: N/A
Shipping Dimensions
Dimensions: In Inches Length: 11.2 inches Width: 8.75 inches Height: 6.00 inches Weight: N/A
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Additional Information

Tar pits are composed of heavy oil fractions called gilsonite, which seeps from the Earth as oil. Crude oil seeps up along the 6th Street Fault from the Salt Lake Oil Field, which underlies much of the Fairfax District north of Hancock Park.[2] The oil reaches the surface and forms pools, becoming asphalt as the lighter fractions of the petroleum biodegrade or evaporate.[3] The asphalt then normally hardens into stubby mounds. The pools and mounds can be seen in several areas of the park.

References:

Referenced from Wikipedia: La Brea Tar Pits
Referenced from Wikipedia: Hydrophilus
Referenced from Wikipedia: Cybister

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