Calico Mountains Arthropod Beds (UA collection): Hemingfordian, California

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Reticulitermes tibalis Banks 1920
Insecta - Hemiptera - Cicadellidae
Euscelis sp. Brullé 1832
Insecta - Hemiptera - Lygaeidae
Miogonates sp. Sailer and Carvalho 1957
Procymophyes sp. Sailer and Carvalho 1957
Insecta - Hemiptera - Notonectidae
Notonectidae indet. (Latreille 1802)
original and current combination Notonectariae
Insecta - Hemiptera - Saldidae
Insecta - Thysanoptera - Thripidae
Anaphothrips (Proscritothrips) vitreus O'Neill 1957
Insecta - Thysanoptera - Aeolothripidae
Melanothrips sp. (Haliday 1836)
original and current combination Melanthrips
Insecta - Psocodea
Miotroctes sp. Pierce 1960
Insecta - Blattodea - Stylotermitidae
Parastylotermes sp. Snyder and Emerson 1949
Insecta - Blattodea - Termitidae
Gnathotermes sp. Holmgren 1912
Insecta - Blattodea - Kalotermitidae
Cryptotermes sp. Banks 1906
Insecta - Hymenoptera - Formicidae
Palaeosminthurus sp. Pierce and Gibron 1962
synonym of Camponotus
Insecta - Coleoptera - Staphylinidae
Carpelimus sp. Leach 1819
Insecta - Coleoptera - Cybocephalidae
Cybocephalus sp. Erichson 1844
Insecta - Coleoptera - Dytiscidae
Schistomerus californense Palmer 1957
Insecta - Diptera - Chironomidae
Calopsectra sp. Kieffer 1909
Insecta - Diptera - Ceratopogonidae
Dasyhelea antiqua Palmer 1957
Johannsenomyia hotchkissae Pierce 1966
nomen dubium belonging to Ceratopogoninae
Culicoides megacanthus Palmer 1957
Miopalpomyia sp. Pierce 1966
synonym of Palpomyia
Insecta - Odonata - Libellulidae
Orthemis ferruginea (Fabricius 1775)
plus two more unidentified libellulids
Collembola - Entomobryomorpha - Entomobryidae
Entomobrya atrocincta
Branchiopoda - Anostraca
Anostraca indet. Sars 1867
Cletocamptus sp. Schmankevitch 1875
Xiphosura - Xiphosurida - Salticidae
Dendryphantes sp. Koch 1837
Xiphosura - Xiphosurida - Dictynidae
Argenna fossilis Petrunkevitch 1957
Xiphosura - Xiphosurida - Lycosidae
Lycosidae indet. Sundevall 1833
Xiphosura - Xiphosurida
Protoarrenurus sp. Cook 1957
see common names

Country:United States State/province:California County:San Bernardino
Coordinates: 35.0° North, 116.8° West (view map)
Paleocoordinates:34.1° North, 111.3° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Period:Neogene Epoch:Miocene
Stage:Burdigalian 10 m.y. bin:Cenozoic 5
Key time interval:Hemingfordian
Age range of interval:20.43000 - 15.97000 m.y. ago
Formation:Barstow Member:Upper
Stratigraphic resolution:group of beds
Stratigraphy comments: 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.
Lithology and environment
Primary lithology:planar lamination,concretionary lithified mudstone
Lithology description: "microlaminated mudstones" including the fossiliferous concretions
Environment:lacustrine - large Tectonic setting:rift
Geology comments: "lake sediments" indicating an environment analogous to that seen in Mono Lake, Big Soda Lake, and Soap Lake
Modes of preservation:body,adpression,concretion
Lagerst�tten type:conservation
Size of fossils:mesofossils
Collection methods and comments
Collection methods:bulk,chemical,acetic,field collection
Reason for describing collection:paleoecologic analysis
Collection method comments: "Over 1000 concretions were collected and etched in a 10% acetic acid bath... residues were examined to identify and assess the relative anatomic preservation of fossils"
University of Arizona collection
Database number:106431
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:M. Clapham Research group:paleoentomology
Created:2011-03-15 12:13:28 Last modified:2016-12-26 17:25:32
Access level:the public Released:2011-03-15 12:13:28
Creative Commons license:CC BY
Reference information

Primary reference:

35523. L. E. Park and K. F. Downing. 2001. Paleoecology of an exceptionally preserved arthropod fauna from lake deposits of the Miocene Barstow Formation, Southern California, U.S.A. Palaios 16(2):175-184 [J. Alroy/J. Alroy]