USGS Cenozoic 19057, Mule Canyon, Calico Hills (Miocene of the United States)

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

• Laminated brown-weathering shale including four beds of nodules

Size classes: macrofossils, mesofossils

Preservation: replaced with calcite, replaced with silica, replaced with other

Collected by K.E. Lohman, A.M. Bassett in 1952, 1954

Primary reference: A. R. Palmer. 1957. Miocene arthropods from the Mojave desert, California. United States Geological Survey Professional Paper 294-G:237-280 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123022: authorized by Matthew Clapham, entered by Matthew Clapham on 10.01.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Hemiptera - Lygaeidae
Procymophyes lithax n. gen. n. sp.
Procymophyes lithax n. gen. n. sp. Sailer and Carvalho 1957 milkweed bug
 Hemiptera - Miridae
Miomonalonion conoidifrons n. gen. n. sp. Sailer and Carvalho 1957 plant bug
 Thysanoptera - Thripidae
Thripidae indet. Stevens 1829 thrips
Anaphothrips (Proscirtothrips) vitreus n. sp. O'Neill 1957 thrips
 Thysanoptera - Melanthripidae
"Melanthripinae indet." = Melanthripidae
"Melanthripinae indet." = Melanthripidae Bagnall 1913 thrips
 Coleoptera - Staphylinidae
Carpelimus sp. Leach 1819 rove beetle
 Coleoptera - Cybocephalidae
 Coleoptera - Dytiscidae
Schistomerus californense n. gen. n. sp. Palmer 1957 predaceous diving beetle
 Diptera - Chironomidae
Calopsectra sp. Kieffer 1909 non biting midge
 Diptera - Ceratopogonidae
Dasyhelea antiqua Palmer 1957 biting midge
Dasyhelea stenoceras n. sp. Palmer 1957 biting midge
Culicoides megacanthus n. sp. Palmer 1957 biting midge
 Odonata - Libellulidae
? Orthemis sp. Hagen 1861 tropical king skimmer
Branchiopoda
 Anostraca -
Anostraca indet. Sars 1867 branchiopod
Arachnida
 Araneae - Dictynidae
Argenna fossilis n. sp. Petrunkevitch 1957 spider
USNM 561977
 Acariformes -