Lava camp mine (Miocene of the United States)

Where: Alaska (65.9° N, 163.1° W: paleocoordinates 66.2° N, 162.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Imuruk Volcanics Formation, Messinian (7.2 - 5.3 Ma)

• Fossil forest buried by volcanic flow

• bed-level stratigraphic resolution

Environment/lithology: dry floodplain; unlithified sandstone and lithified peat

• Alluvial sands and gravels with interbedded peats and masses of forest detritus

Size classes: macrofossils, mesofossils

Primary reference: J. V. Matthews. 1970. Two new species of Micropeplus from the Pliocene of western Alaska with remarks on the evolution of Micropeplinae (Coleoptera: Staphylinidae). Canadian Journal of Zoology 48:779-788 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123352: authorized by Matthew Clapham, entered by Matthew Clapham on 19.01.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Tsuga heterophylla1
isolated stalked, flattened, elongate needles having rounded apices
Vaccinium sp.1
seeds
Carex spp.1
seeds
Insecta
 Hymenoptera - Formicidae
Camponotus sp.1 Mayr 1861 ant
Leptothorax sp.1 Mayr 1855 ant
 Hymenoptera - Diapriidae
"? Diapriidae indet." = Diapriinae1
"? Diapriidae indet." = Diapriinae1 Haliday 1833 wasp
 Coleoptera - Ptinidae
"Anobiidae indet." = Ptinidae1
"Anobiidae indet." = Ptinidae1 Latreille 1802 spider beetle
 Coleoptera - Byrrhidae
Byrrhus sp.1 Linnaeus 1767 pill beetle
Simplocaria sp.1 Stephens 1829 pill beetle
 Coleoptera - Hydrophilidae
"Georyssus sp." = Georissus1
"Georyssus sp." = Georissus1 Latreille 1809 water scavenger beetle
 Coleoptera - Helophoridae
Helophorus (Cyphelophorus) sp.1 Fabricius 1775 water scavenger beetle
 Coleoptera - Ptiliidae
? Acrotrichis sp.1 Moltschulsky 1848 feather-winged beetle
Micridium sp.1 Motschulsky 1868 feather-winged beetle
 Coleoptera - Staphylinidae
Lathrobium sp.1 Gravenhorst 1802 rove beetle
? Veraphis sp.1 Casey 1897 antlike stone beetle
Stenus sp.1 Latreille 1796 rove beetle
Omaliinae indet.1 MacLeay 1825 rove beetle
Micropeplus hopkinsi n. sp. Matthews 1970 rove beetle
Micropeplus hoogendorni n. sp. Matthews 1970 rove beetle
Kalissus nitidus LeConte 1874 rove beetle
"Micropeplus tesserula" = Arrhenopeplus tesserula Curtis 1828 rove beetle
 Coleoptera - Zopheridae
Namunaria sp.1 Reitter 1882 ironclad beetle
 Coleoptera - Latridiidae
Enicmus sp.1 Thomson 1859 minute brown scavenger beetle
 Coleoptera - Chrysomelidae
Chrysolina sp.1 Moltschulsky 1860 leaf beetle
 Coleoptera - Curculionidae
Vitavitus cf. thulius2 Kissinger 1973 snout beetle
two heads, one prothorax fragment
? Ceutorhynchus sp.1 Germar 1824 snout beetle
 Coleoptera - Carabidae
"Carabus (Diocarabus) cf. truncaticollis" = Carabus (Aulonocarabus) truncaticollis1, Amara sp.1, "Pterostichus (Lyperopherus) cf. vermiculosus" = Pterostichus (Lenapterus) vermiculosus1, "Pterostichus (Omaseus) cf. corvinus" = Pterostichus (Melanius) corvinus1, Leistus sp.1, Nebria sp.1, "Bembidion (Plataphodes) sp." = Bembidion (Plataphus)1, Bembidion (Trepanedoris) spp.1, Bembidion (Peryphus) sp.1, Dyschirius (Dyschirodius) sp.1, Patrobus cf. septentrionis1, Agonum sp.1
"Carabus (Diocarabus) cf. truncaticollis" = Carabus (Aulonocarabus) truncaticollis1 Eschscholtz 1833 ground beetle
Amara sp.1 Bonelli 1810 ground beetle
"Pterostichus (Lyperopherus) cf. vermiculosus" = Pterostichus (Lenapterus) vermiculosus1 Ménétriés 1851 ground beetle
"Pterostichus (Omaseus) cf. corvinus" = Pterostichus (Melanius) corvinus1 Dejean 1828 ground beetle
Leistus sp.1 Frölich 1799 ground beetle
Nebria sp.1 Latreille 1802 ground beetle
"Bembidion (Plataphodes) sp." = Bembidion (Plataphus)1 Motschulsky 1864 ground beetle
Bembidion (Trepanedoris) spp.1 Netolitzky 1918 ground beetle
Bembidion (Peryphus) sp.1 Dejean 1821 ground beetle
Dyschirius (Dyschirodius) sp.1 Bonelli 1810 ground beetle
Patrobus cf. septentrionis1 Dejean 1828 ground beetle
Agonum sp.1 Bonelli 1810 ground beetle
Arachnida
 Araneae - Thomisidae
Xysticus archaeopalpus n. sp.3 Leech and Matthews 1971 crab spider
 Acariformes - Oribatellidae
? Oribatella sp.1 Banks 1895 oribatid mite
 Acariformes - Peloppiidae
? Ceratoppia sp.1 Berlese 1908 oribatid mite
 Acariformes - Cepheidae
"Cephenus cf. corae" = Cepheus corae1
"Cephenus cf. corae" = Cepheus corae1 Jacot 1928 oribatid mite
Pinopsida
 Pinales - Pinaceae
Pinus monticola1 pine
several fascicles of five slender needles
Picea glauca1 spruce
female cones, isolated needles
Picea mariana1 spruce
female cones, isolated needles
Picea cf. sitchensis1 spruce
isolated needles
Monocotyledoneae
 Cyperales - Commelinidae
Cyperus spp.1 Linnaeus 1753 sedge
seeds