Casamayoran

The Casamayoran () age is a period of geologic time (around 48.0–39.0 Ma) within the middle Eocene epoch of the Paleogene, used more specifically within the South American land mammal age (SALMA) classification. It follows the Riochican and precedes the Mustersan age.Paleo Database: Casamayoran The Casamayoran is often split into the older Vacan and younger Barrancan subages, which are sometimes considered distinct enough to qualify as SALMAs in their own right.

Several astrapotherian mammals are known from this period, such as Antarctodon and Albertogaudrya from Antarctica and Argentina, respectively. Albertogaudrya and Scaglia were the size of a sheep or a small tapir, hence among the larger mammals in South America at this time.Rose, 2006, p.236

Etymology This age is named after the Casamayor Formation of the Golfo San Jorge Basin.

Formations

Formation Country Basin Notes Casamayor Formation Golfo San Jorge Basin Abanico Formation Abanico Basin Bogotá Formation Altiplano Cundiboyacense Cayara Formation Cochabamba Department Chota Formation Bagua Basin Los Cuervos Formation Cesar-Ranchería Basin Fonseca Formation Fonseca Basin Huitrera Formation Neuquén Basin Laguna del Hunco Formation Cañadón Asfalto Basin Lumbrera Formation Salta Basin Maíz Gordo Formation Salta Basin Quebrada de los Colorados Formation Salta Basin Sarmiento Formation Golfo San Jorge Basin

Fossils Group Fossils Formation Notes Mammals Florentinoameghinia mystica, Notopithecus adapinus, Notostylops murinus, Thomashuxleya sp., Trigonostylops sp., cf. Pleurostylodon sp. Casamayor Antepithecus brachystephanus Abanico cf. Camargomendesia indet. Cayara Bonapartherium hinakusijum, Boreastylops lumbrerensis, Callistoe vincei, Campanorco inauguralis, Colbertia lumbrerense, Coquenia bondi, Dolichostylodon saltensis, Griphotherion peiranoi, Indalecia grandensis, Lumbreratherium oblitum, Pampahippus arenalesi, P. secundus, Pampatemnus deuteros, P. infernalis, Patene simpsoni, Prepidolops didelphoides, P. molinai, ?Albertogaudrya carahuasensis, Borhyaenoidea sp. Lumbrera Coloradolops cardonensis, Pampahippus powelli, Prostegotherium sp., cf. Utaetus sp., Dasypodidae indet., Leontiniidae indet., Toxodontia indet. Quebrada delos Colorados Acropithecus rigidus, Adiantoides magnus, Amphidolops serrula,Anisolambda amel, A. fissidens, Asmithwoodwardia subtrigona, Coona gutierrezi, C. pattersoni, Didolodus minor, Edvardotrouessartia sola, Florentinoameghinia mystica, Henricosbornia lophodonta, Ideodelphys microscopicus, Isotemnus primitivus, Josepholeidya adunca, Maxschlosseria consumata, M. minuta, Notopithecus adapinus, Notostylops appressus, N. pendens, Pleurostylodon similis, Polydolops serra, P. thomasi, Ricardolydekkeria cf. praerupta, Scaglia kraglievichorum, Sparnotheriodon epsilonoides, Thomashuxleya externa, Transpithecus obtentus, Trigonostylops ?wortmani, Homalostylops sp., Patene sp., Albertogaudrya indet., Didolodontidae indet., Prostegotherium indet., Victorlemoinea indet. Sarmiento Birds Telmabates antiquus, T. howardae Sarmiento Reptiles &amphibians Loricata indet. Cayara Pelomedusoides indet. Los Cuervos Llankibatrachus truebae Huitrera Shelania pascuali Lagunadel Hunco Ayllusuchus fernandezi, Lumbrerasaurus scagliai, Sebecus sp., Sebecosuchia indet. Lumbrera Crocodylia indet., Testudinata indet. Quebrada delos Colorados Chubutophis grandis, Gaffneylania auricularis, Niolamia argentina, Sebecus icaeorhinus, Waincophis australis Sarmiento Fishes Erythrinidae indet., Serrasalmidae indet., Siluriformes indet. Cayara cf. Carcharodon auriculatus, Carcharodon sp. Casamayor Bachmannia chubutensis Lagunadel Hunco Gymnogeophagus eocenicus, Lepidosiren paradoxa, Proterocara argentina Lumbrera Insects Duartia pulchella, Fonsecablatta patricioi, Fonsecacarabus placidus, Fonsecacicada mineira, Fonsecadalia perfectus, F. propinquus, Fonsecahymen stigmata, Spargotermes costalimai, Auchenorrhyncha indet., Curculionidae indet. Fonseca Catogenus punctatus, Inacayalestes aikunhuapi Huitrera Molluscs Gibbula dalli, Jorgechlamys centralis, Ostrea ingens, Pecten proximus, Scalaria rugulosa, Turritella breantania Casamayor Brachiopods Magellania lenticularis, Plicirhynchia plicigera, Tegulorhynchia squamosa, Terebratella dorsata, T. patagonica Casamayor Echinoids Hypechinus patagonensis, Iheringiella patagonensis, Isechinus (Toxopneustes) praecursor, Linthia gaudryii, Platypygus (Cyrthoma) posthumus, Psammechinus iheringi, P. tournoueri, Schizaster ameghinoi Casamayor Pollen Diporisporites elongatus, Gabonisporis vigourouxii, Jussitriporites menendezii, Liquidambarpollenites cf. brandonensis, Podocarpidites cf. marwickii, Retitriletes austroclavatidites, Smilacipites saltensis, Tricolpites lumbrerensis, T. cf. reticulatus, T. vulgaris, Verrustephanoporites simplex, Baculatisporites sp., Diporicellaesporites sp., Inapertisporites sp., Inaperturopollenites sp., Laevigatosporites sp., Nothopollenites sp., Pluricellaesporites sp., Rhoipites sp. Lumbrera

References

Bibliography General

Casamayor Formation

Abanico Formation

Bogotá Formation

Cayara Formation

Chota Formation

Los Cuervos Formation

Fonseca Formation

Huitrera Formation

Laguna del Hunco Formation

Lumbrera Formation

Maíz Gordo Formation

Quebrada de Los Colorados Formation

Sarmiento Formation