Where: California (34.9° N, 116.8° W: paleocoordinates 34.1° N, 111.3° W)
• coordinate estimated from map
• local area-level geographic resolution
When: Calico Member (Barstow Formation), Hemingfordian (20.4 - 16.0 Ma)
• 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
Reposited in the LACM
Primary reference: W. D. Pierce. 1966. Fossil arthropods of California 29. Silicified Miocene pupae of ceratopogonid flies. Bulletin of the Southern California Academy of Sciences 65:81-98 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 152216: authorized by Matthew Clapham, entered by Matthew Clapham on 11.11.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
Insecta | |
Dasyhelea antiqua, Dasyhelea dara, Dasyhelea stenoceras, Dasyhelea browneae, Dasyhelea kanakoffi, Dasyhelea judithae, "Parapalpomyia ryshkoffi" = Palpomyia ryshkoffi, "Neopalpomyia freyi" = Palpomyia freyi, Johannsenomyia hotchkissae, "Culicoides miocenea" = Culicoides mioceneus
Dasyhelea dara Pierce 1966 biting midge
Dasyhelea stenoceras Palmer 1957 biting midge
Dasyhelea browneae Pierce 1966 biting midge
Dasyhelea kanakoffi Pierce 1966 biting midge
Dasyhelea judithae Pierce 1966 biting midge
"Parapalpomyia ryshkoffi" = Palpomyia ryshkoffi Pierce 1966 biting midge
"Neopalpomyia freyi" = Palpomyia freyi Pierce 1966 biting midge Not including specimen known to come from LACMIP 362
Johannsenomyia hotchkissae Pierce 1966 biting midge
"Culicoides miocenea" = Culicoides mioceneus Pierce 1966 biting midge |