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The Casamayoran (Spanish: Casamayorense) age is a period of geologic time (54.0—48.0 Ma) within the Early 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.[1]

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.[2]

Contents

EtymologyEdit

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

FormationsEdit

FossilsEdit

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 de
los 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 Laguna
del Hunco
Ayllusuchus fernandezi, Lumbrerasaurus scagliai, Sebecus sp., Sebecosuchia indet. Lumbrera
Crocodylia indet., Testudinata indet. Quebrada de
los 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 Laguna
del 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

ReferencesEdit

  1. ^ Paleo Database: Casamayoran
  2. ^ Rose, 2006, p.236
  3. ^ Raigemborn et al., 2010, p.252
  4. ^ Godoy et al., 2012
  5. ^ Muñoz et al., 2006
  6. ^ Bayona et al., 2012, p.103
  7. ^ a b c Marshall & Sempere, 1991, p.633
  8. ^ Chacaltana et al., 2015, p.2
  9. ^ Castro Medina, 2010, p.53
  10. ^ Hernández, 2003, p.47
  11. ^ Cadena & Schweitzer, 2014, p.461
  12. ^ Mendes et al., 2015, p.28
  13. ^ Escostegui & Franchi, 2010, p.420
  14. ^ Wilf et al., 2005, p.634
  15. ^ Del Papa, 2006, p.314
  16. ^ Narváez, 2009, p.24
  17. ^ Del Papa et al., 2013, p.59
  18. ^ Payrola Bosio et al., 2010, p.312
  19. ^ Dozo et al., 2014, p.241
  20. ^ Acosta & Tambussi, 2005, p.128
  21. ^ Oficina del Diablo at Fossilworks.org
  22. ^ Casamayor Bed 1 at Fossilworks.org
  23. ^ Azufre at Fossilworks.org
  24. ^ a b c Wila Apacheta at Fossilworks.org
  25. ^ Herrera et al., 2017
  26. ^ Deraco & García López, 2015
  27. ^ Carahuasi at Fossilworks.org
  28. ^ Estancia Pampa Grande at Fossilworks.org
  29. ^ a b Estancia Pampa Grande East at Fossilworks.org
  30. ^ Estancia Pampa Grande Cachi River at Fossilworks.org
  31. ^ Estancia Pampa Grande Río Cachi at Fossilworks.org
  32. ^ El Simbolar at Fossilworks.org
  33. ^ Estrecho del Tonco at Fossilworks.org
  34. ^ Estancia Pampa Grande Toro Bordo at Fossilworks.org
  35. ^ Estancia Pampa Grande River Pablo at Fossilworks.org
  36. ^ Estancia Pampa Grande Pablo Bordo at Fossilworks.org
  37. ^ García López et al., 2017
  38. ^ a b Cerro Bayo at Fossilworks.org
  39. ^ Cerro Tin Tin at Fossilworks.org
  40. ^ Valle del Tonco at Fossilworks.org
  41. ^ a b Valle Hermoso at Fossilworks.org
  42. ^ a b c Cañadón Hondo Bird Clay at Fossilworks.org
  43. ^ Tapera de López 1 at Fossilworks.org
  44. ^ Cañadón Vaca at Fossilworks.org
  45. ^ Cañadón Vaca faunule 1 at Fossilworks.org
  46. ^ Calenturitas Coal Mine at Fossilworks.org
  47. ^ a b Pampa de Jones at Fossilworks.org
  48. ^ Cañadon del Hunco at Fossilworks.org
  49. ^ Mina Aguilar at Fossilworks.org
  50. ^ Sterli et al., 2015
  51. ^ Cerro Verde at Fossilworks.org
  52. ^ a b c d Casamayor Bed 3 at Fossilworks.org
  53. ^ Laguna del Hunco at Fossilworks.org
  54. ^ Alemania at Fossilworks.org
  55. ^ Casa Grande at Fossilworks.org
  56. ^ Fonseca village at Fossilworks.org
  57. ^ Fonseca village 2 at Fossilworks.org
  58. ^ Fonseca village 3 at Fossilworks.org
  59. ^ Mendes et al., 2015, p.32
  60. ^ Estancia Don Hipólito at Fossilworks.org
  61. ^ Fajas Verdes I & II at Fossilworks.org

BibliographyEdit

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