Where: California (34.9° N, 116.8° W: paleocoordinates 34.1° N, 111.3° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Calico Member (Barstow Formation), Hemingfordian (20.4 - 16.0 Ma)
• Lower nodule zone. Overlying fine-grained lacustrine beds (here referred to as the Calico Member of the Barstow Formation) are bracketed between ca. 19 and 16.9 Ma, and are thus older than the type section of the Barstow Formation in the Mud Hills. Several 17.1–16.8 Ma calc-alkaline dacite domes intrude the Calico Member.
• group of beds-level stratigraphic resolution
Environment/lithology: lacustrine - large; lithified, nodular, brown shale
Size classes: macrofossils, mesofossils
Preservation: replaced with calcite, replaced with silica, replaced with other
Collected by J. Gibron in 1962; reposited in the LACM
Primary reference: W. D. Pierce and J. Gibron. 1962. Fossil arthropods of California. 24. Some unusual fossil arthropods from the Calico Mountain nodules. Bulletin of the Southern California Academy of Sciences 61:143-151 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 138761: authorized by Matthew Clapham, entered by Matthew Clapham on 26.01.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
Collembola | |
Entomobrya sp. Rondani 1861 springtail | |
Insecta | |
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Palaeosminthurus juliae n. gen. n. sp.
Palaeosminthurus juliae n. gen. n. sp. Pierce and Gibron 1962 ant | |
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Miochlorotettix gibroni n. gen. n. sp.
Miochlorotettix gibroni n. gen. n. sp. Pierce 1963 leafhopper LACMIP 5283, 5278, 5279, 5296, 5280, 5281, 5299
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Arachnida | |
Chthoniidae indet. Daday 1889 pseudoscorpion
Lechytia sp. Balzan 1891 pseudoscorpion | |
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