The Laventan () age is a period of geologic time (13.8 to 11.8 Ma) within the Middle Miocene epoch of the Neogene, used more specifically within the SALMA classification in South America. It follows the Colloncuran and precedes the Mayoan age.

Etymology The age is named after the Miocene Lagerstätte La Venta, where a rich biodiversity from the Middle Miocene has been recovered from the Honda Group.

Formations

Formation Country Basin Notes Honda Group Upper Magdalena Valley Honda Group Quebrada Honda Basin Aisol Formation San Rafael Block Bahía Inglesa Formation Caldera Basin Capadare Formation Falcón Basin Choquecota Formation Altiplano Basin Cura-Mallín Group Cura-Mallín Basin Ipururo Formation Ucayali Basin Paraná Formation Paraná Basin Pebas Formation Amazon Basin Pisco Formation Pisco Basin Santa Inés Formation Eastern Venezuela Basin Sincelejo Formation Sinú-San Jacinto Basin Socorro Formation Falcón Basin Urumaco Formation Falcón Basin

Fossil content Group Fossils Formation Notes Mammals lesser bulldog bat (Noctilio albiventris), LaVal's disk-winged bat (Thyroptera lavali), Spix's disk-winged bat (Thyroptera tricolor), Acarechimys minutissimus, Anachlysictis gracilis, Anadasypus hondanus, Aotus dindensis, Boreostemma acostae, B. gigantea, Brievabradys laventensis, Cebupithecia sarmientoi, Dukecynus magnus, Eodolichotis elachys, E. maddeni, Glossotheriopsis pascuali, Granastrapotherium snorki, Hilarcotherium castanedaii, Hondadelphys fieldsi, Hondathentes cazador, Huilabradys magdaleniensis, Huilatherium pluriplicatum, Kiotomops lopezi, Lagonimico conclucatus, Lycopsis longirostrus, Megadolodus molariformis, Micodon kiotensis, Micoureus laventicus, Microscleromys cribiphilus, M. paradoxalis, Microsteiromys jacobsi, Miocallicebus villaviejai, Miocochilius anomopodus, Mohanamico hershkovitzi, Mormopterus colombiensis, Nanoastegotherium prostatum, Neoglyptatelus originalis, Neonematherium flabellatum, Neoreomys huilensis, Neotamandua borealis, Notonycteris magdalenensis, N. sucharadeus, Nuciruptor rubricae, Pachybiotherium minor, Palynephyllum antimaster, Patasola magdalenae, Pedrolypeutes praecursor, Pericotoxodon platignathus, Pitheculites chenche, Potamops mascahehenes, Potamosiren magdalenensis, Prodolichotis guerreroi, P. pridiana, Prolicaphrium sanalfolsensis, Prothoatherium colombianus, Pseudoprepotherium confusum, Rhodanodolichotis antepridiana, R. vucetichae, Ricardomys longidens, Saimiri annectens, S. fieldsi, Scleromys colombianus, S. schurmanni, Scirrotherium hondaensis, Stirtonia tatacoensis, S. victoriae, Thylamys colombianus, Thylamys minutus, Thyroptera robusta, Villarroelia totoyoi, Xenastrapotherium kraglievichi, Cochilius sp., Diclidurus sp., Eumops sp., Hapalops sp., Olenopsis sp., Theosodon sp., ?Steiromys sp., Dolichotinae sp., ?Echimyidae sp., Megalonychidae sp., Megatheriinae sp., Nothrotheriinae sp., Dasypodidae sp., Leontiniidae sp., Proterotheriidae indet., Toxodontidae sp. HondaGroupColombia Acyon myctoderos, Australogale leptognathus, Chimeralestes ambiguus, Guiomys unica, Hapalops angustipalatus, Hemihegetotherium trilobus, Hiskatherium saintandrei, Hondalagus altiplanensis, Lakukullus anatisrostratus, Mesoprocta hypsodus, Miocochilius federicoi, Palaeothentes relictus, P. serratus, Propalaehoplophorus andinus, Quebradahondomys potosiensis, Acarechimys sp., cf. Paratrigodon sp., Prolagostomus sp., cf. Prozaedyus sp., Lagostominae indet., Mesotheriinae indet., Borhyaenidae indet., Caenolestidae indet., Capromyidae indet., Caviidae indet., Chinchillidae indet., Echimyidae indet., Euphractinae indet., Macraucheniidae indet., Octodontidae indet., Proterotheriidae indet., ? Xenastrapotherium indet. HondaGroupBolivia Nesodon taweretus, cf. Astrapotherium sp., cf. Theosodon sp., Lomaphorini indet., Mylodontinae indet., Propalaehoplophorinae indet., Toxodontidae indet. Aisol Microtypotherium choquecotense, Prozaedyus sp., Chinchillidae indet., Glyptodontidae indet., Hegetotheriidae indet. Choquecota Heteropsomyinae (aff. Acarechimys) sp., Dasyproctidae (aff. Alloiomys) sp., Prolagostomus sp., Caviomorpha indet., Dasypodidae indet., Typotheria indet. Cura-Mallín Drytomomys cf. aequatorialis, Granastrapotherium cf. snorki, Miocochilius anomopodus, Neoglyptatelus originalis, Parapropalaehoplophorus septentrionalis, Pericotoxodon cf. platignathus, Potamarchus murinus, cf. Theosodon sp., Acarechimys sp., Boreostemma sp., Megathericulus sp., cf. Tetramerorhinus sp., Urumacotherium sp., Xenastrapotherium sp., Borhyaenoidea indet., Delphinida indet., Glyptodontidae indet., Macraucheniidae indet., Megalonychidae indet., Mylodontidae indet., Octodontoidea indet., Potamarchinae indet., Uruguaytheriinae indet. Ipururo Pontistes rectifrons, Prionodelphis rovereti, Properiptychus argentinus, Protautoga longidens, cf. Balaenoptera sp., Chrysophrys sp., Dioplotherium sp., Balaenidae indet., Physeteridae indet., Sciaenidae indet., ?Sparidae indet. Paraná Dinomyidae indet., ? Octodontoidea indet. Pebas Boreostemma venezolensis Santa Inés Neoglyptatelus sincelejanus Sincelejo Mirandabradys socorrensis, Megatheriidae indet. Socorro cf. Olenopsis sp., Mylodontidae indet. Urumaco Birds Aramus paludigrus, Galbula hylochoreutes, Hoazinoides magdalenae HondaGroupColombia Psilopteridae indet. Aisol Pygoscelis calderensis, Spheniscus megaramphus, S. urbinai, Pelagornis sp., aff. Thalassarche sp. BahíaInglesa Pelagornis cf. chilensis Capadare Reptiles &amphibians cane toad (Bufo marinus), Chelus colombiana, Chelonoidis hesterna, Colombophis portai, Dracaena colombiana, ?Eunectes stirtoni, Podocnemis medemi, Gryposuchus colombianus, Langstonia huilensis, Purussaurus neivensis, Balanerodus logimus, Charactosuchus fieldsi, Mourasuchus atopus, Eocaiman sp., Gavialis sp., Sebecus sp., Alligatoridae indet. HondaGroupColombia Crocodylia sp. Aisol Bairdemys thalassica Capadare Barinasuchus arveloi Ipururo Caiman wannlangstoni, Gnatusuchus pebasensis, Gryposuchus pachakamue, Purussaurus neivensis, Kuttanacaiman iquitosensis, Mourasuchus atopus, Paleosuchus sp., Podocnemis sp., Gavialoidea indet. Pebas Colombophis spinosus, Ikanogavialis gameroi, Caiman sp., Mourasuchus sp., Purussaurus sp., Thecachampsa sp., Alethinophidia indet., Boinae indet. Socorro Globidentosuchus cf. brachyrostris, Caiman sp., Mourasuchus sp., Purussaurus sp. Urumaco Fishes &crustaceans Colossoma macropomum, Lepidosiren paradoxa, cf. Acanthicus, Arapaima sp., Brachyplatystoma cf. B. vaillanti, Brachyplatystoma promagdalena, Sylviocarcinus piriformis, cf. Corydoras sp., Hoplias sp., cf. Hoplosternum sp., Hydrolycus sp., Phractocephalus hemioliopterus, Serrasalmus sp., Pygocentrus sp., or Pristobrycon sp. (cf. Myletes sp.), Ariidae indet., Characidae cf. Tetragonopterinae, Cichlidae indet., Doradidae indet., Loricariidae indet., Potamotrygonidae indet. HondaGroupColombia Megalodon, Carcharias acutissima, Carcharodon hastalis, Galeocerdo aduncus, Hemipristis serra, Carcharhinus sp., Heterodontus sp., Squalus sp., Squatina sp., Dasyatidae indet., Myliobatoidea indet., Potamotrygonidae indet. Paraná cf. Hydrolycus sp., Leporinus sp., Potamotrygon sp., Pristis sp., Anostomidae indet. Pebas Megalodon, Aetobatus arcuatus, Hemipristis serra, Mugil cephalus, Carcharhinus sp., Citharichthys sp., Galeocerdo sp., Rhinoptera sp., Sphyrna sp., Symphurus sp. Socorro Insects Macroteleia yaguarum, Sycorax peruensis Pebas Flora Astroniumxylon parabalansae, Piptadenioxylon paraexcelsa, Solanumxylon paranensis Paraná

Correlations The Laventan (13.8 to 11.8 Ma) correlates with: NALMA latest Barstovian (15.97-13.65 Ma)Barstovian at Fossilworks.org early Clarendonian (13.65-10.3 Ma)Clarendonian at Fossilworks.org Californian ages Luisian (15.5-13.5 Ma) ELMA - Astaracian (15.97-11.608 Ma)Astaracian at Fossilworks.org CPSCentral Paratethys Stages at Fossilworks.org Badenian (13.65-12.7 Ma)Badenian at Fossilworks.org Sarmatian (12.7-11.608 Ma) Sarmatian] at Fossilworks.org New Zealand stratigraphy - Southland epoch (15.9-10.92 Ma)Southland epoch at Fossilworks.org Lillburnian (15.1-12.98 Ma)Lillburnian at Fossilworks.org early Waiauan (12.98-10.92 Ma)Waiauan at Fossilworks.org Australian ages Bairnsdalian (15.0-10.5 Ma) Japanese ages Tozawan (15.97-13.5 Ma) NMAC - Tunggurian (13.65-11.1 Ma)Tunggurian at Fossilworks.org

+ Laventan correlations in South America Formation Honda Honda Aisol Cura-Mallín Pisco Ipururo Pebas Capadare Urumaco Inés Paraná Map Basin VSM Honda San Rafael Caldera Pisco Ucayali Amazon Falcón Venezuela Paraná Boreostemma Hapalops Miocochilius Theosodon Xenastrapotherium Mylodontidae Sparassodonta Primates Rodents Birds Terror birds Reptiles megalodon Flora Insects Environments Fluvial Fluvio-deltaic Fluvio-lacustrine Fluvio-deltaic Fluvial Volcanic Yes

References

Bibliography Laventan

Honda Group, Colombia

Honda Group, Bolivia

Aisol Formation

Bahía Inglesa Formation

Capadare Formation

Choquecota and Mauri Formations

Cura-Mallín Group

Gran Bajo del Gualicho Formation

Ipururo and Pebas Formations

Paraná Formation

Pisco Formation

Santa Inés Formation

Sincelejo Formation

Socorro and Urumaco Formations

Further reading