Gibron USGS 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 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

 Hemiptera - Cicadellidae
Miochlorotettix gibroni n. gen. n. sp.
Miochlorotettix gibroni n. gen. n. sp. Pierce 1963 leafhopper
LACMIP 5283, 5278, 5279, 5296, 5280, 5281, 5299
 Psocodea - Trogiidae
Trogiidae indet. Enderlein 1903 granary booklouse
 Hymenoptera - Formicidae
"Palaeosminthurus juliae n. gen. n. sp." = Camponotus festinatus
"Palaeosminthurus juliae n. gen. n. sp." = Camponotus festinatus Buckley 1866 ant
 Hymenoptera -
Ichneumonoidea indet. Latreille 1802 wasp
Chalcidoidea indet. chalcid wasp
 Dicondylia -
Lepidoptera indet. Linnaeus 1758 moth
 Ephemeroptera - Baetidae
Baetidae indet. Leach 1815 mayfly
LACMIP 5096, 5286, 5307
 Entomobryomorpha - Entomobryidae
Entomobrya sp. Rondani 1861 springtail
 Araneae - Dictynidae
Argenna fossilis Petrunkevitch 1957 spider
 Pseudoscorpiones - Chthoniidae
Chthoniidae indet. Daday 1889 pseudoscorpion
 Pseudoscorpiones - Lechytidae
Lechytia sp. Balzan 1891 pseudoscorpion