A New Megaflora (Fossil Woods and Leaves) From the Miocene of Southwestern Patagonia

Pujana, Roberto R.; Panti, Carolina; Cuitiño, José Ignacio; Massini, Juan Leandro García; Mirabelli, Sebastian Luis

doi:10.5710/amgh.05.01.2014.2805

Cited by 22 publications

(13 citation statements)

References 57 publications

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“…Moreover, the middle Eocene-early Oligocene interval was characterized by the invasion of Nothofagus forests in Patagonia in close agreement with a marked cooling trend (Barreda & Palazzesi, 2007). Fossil woods of Nothofagaceae were recorded from several regions in Antarctica (Poole, 2002 and references therein) and in Patagonia (Poole, 2002;Pujana, 2009;Brea et al, 2015;Pujana et al, 2015;Egerton et al, 2016;Terada et al, 2006). Records of Nothofagacean leaves from the Paleogene of Patagonia are fairly abundant (eg.…”

mentioning

confidence: 63%

Southern beech (Nothofagaceae) fossil leaves from the Río Turbio Formation (Eocene–?Oligocene), Santa Cruz Province, Argentina.

Panti

2019

MACN

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Nothofagus Blume belongs to the monogeneric family Nothofagaceae and includes 43 extant species of trees (Christenhusz & Byng, 2016) grouped in four monophyletic subgenera (Hill & Read, 1991). The temperate subgenera (Nothofagus, Lophozonia and Fuscospora) are mainly distributed in temperate regions of the Southern Hemisphere (New Zealand, Australia and South America) with some taxa (subgenus Brassospora) extending northward into the tropics (New Guinea and New Caledonia). In South America, Nothofagaceae is represented by 10 species, most of them deciduous, distributed in the Andean Region from 33° to 56° S latitude, with the northern limit determined by the seasonally arid conditions of the Mediterranean climate of central Chile (McQueen, 1976; Donoso, 1996). Below 37º south in both, Chile and Argentina, Nothofagus occurs in two broad types of forests: temperate rainforests on climatically favourable sites, generally associated with Maytenus magellanica, Drimys winteri, Pilgerodendron uviferum and Embothrium coccineum among others and, a pure or nearly pure Nothofagus forests on less favourable sites referred to as Patagonian or Subantartic Nothofagus forests (Veblen et al., 1996). In particular, the extant vegetation of the Río Turbio area corresponds to an ecotone between the Patagonian cool temperate rainforest dominated by Nothofagus pumilio (Poepp. & Endl.) Krasser (Lenga) followed by Nothofagus antarctica (G.Forst.) Oerst. (Nĩre) (Leoń et al., 1998; Cavallaro, 2006) and the steppe dominated by shrubs and herbs.

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confidence: 63%

Southern beech (Nothofagaceae) fossil leaves from the Río Turbio Formation (Eocene–?Oligocene), Santa Cruz Province, Argentina.

Panti

2019

MACN

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“…South America has scarce Mesozoic and Cenozoic records assigned to Cupressinoxylon (Bodnar et al 2015;Conwentz, 1885;Egerton et al, in press;Herbst et al, 2007;Martínez, 2010;Nishida, 1984aNishida, , 1984bPhilippe et al, 2004;Pujana et al, 2014Pujana et al, , 2015. The comparison between C. hallei and the South American fossil species of Cupressaceae is shown in Table 2.…”

Section: Comparison With Fossil Taxamentioning

confidence: 94%

“…Cupressinoxylon sp. (Pujana et al, 2015) has many features in common but this example has a very brief description which does not allow for a detailed comparison. Finally, Cuppressinoxylon sp.…”

Section: Comparison With Fossil Taxamentioning

confidence: 98%

“…However, despite this, fossil genera related to the family Cupressaceae are: Protojuniperoxylon and Cupressinoxylon for the Triassic (Bodnar & Artabe, 2007;Bodnar et al, 2015;Bonetti, 1966), Protelicoxylon, Herbstiloxylon and Protojuniperoxylon for the Jurassic (Gnaedinger, 2007;Gnaedinger, G omez, & Brea, 2013) and Cupressinoxylon for the Cretaceous to Cenozoic (Egerton, Williams, & Lacovara, in press;Kr€ ausel, 1949;Martínez, 2010;Pujana, Panti, Cuitiño, García Massini, & Miravelli, 2015) suggesting that the diversity of cupressoid conifers of South-Western Gondwana was broadest during the Mesozoic than the present-day. In the Southern Hemisphere the reliable oldest fossil wood record of the Cupressaceae sensu lato is Cupressinoxylon sp.…”

Section: Introductionmentioning

confidence: 96%

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Aptian–Albian Cupressaceae (sensu stricto) woods from Cañadón Asfalto Basin, Patagonia Argentina

Brea

Bellosi

Umazano

et al. 2016

Cretaceous Research

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“…because it has bordered pits with greater diameter ordered predominantly in a single series, and higher rays (Pujana et al . 2015b). It is worth mentioning that A. parrensis has an anatomical structure similar to the type I wood of Texas, USA, described by Wheeler & Lehman (2005).…”

Section: Comparisons With Fossil Taxamentioning

confidence: 99%

Upper Jurassic, Upper Cretaceous and Palaeocene conifer woods from Mexico

Ríos-Santos

Cevallos-Ferriz

2017

Earth and Environmental Science Transactions of the Royal Socie

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Although there are reports of permineralised woods in Mesozoic and Cenozoic strata in Mexico, there are few palaeobotanical studies based on coniferous stems. Four taxa of fossil wood from three localities in Mexico are described at the anatomical level and identified taxonomically based on detailed comparisons with woods of extant and fossil taxa. Agathoxylon gilii sp. nov. and A. jericonse sp. nov. are determined from the Todos Santos Formation (Upper Jurassic), in Chiapas; A. parrensis sp. nov. is described from the Las Encinas Formation (Palaeocene) in Coahuila; and Taxodioxylon cabullensis sp. nov. corresponds with material from the Packard Shale Formation in Sonora. Dominance of Araucariaceae and Cupressaceae in this region during the Mesozoic and early Cenozoic is further supported by leaf records, but these materials may also represent other taxa, like Cheirolepidaceae, which may have araucarioid secondary xylem. Records of Brachyphyllum and/or Pagiophyllum, which may represent araucarioid or cheirolepidaceous taxa, and different cupressaceous leaves, have been collected in rocks of the same period in nearby formations. At present, the amalgamation of isolated organs to form one plant is uncertain and, thus, there is an open challenge to reconstruct the plants and better understand these extinct communities. The new fossil taxa will add to the diversity of extinct plants and conifer communities during the Mesozoic and early Cenozoic in low-latitude North America.

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A New Megaflora (Fossil Woods and Leaves) From the Miocene of Southwestern Patagonia

Cited by 22 publications

References 57 publications

Southern beech (Nothofagaceae) fossil leaves from the Río Turbio Formation (Eocene–?Oligocene), Santa Cruz Province, Argentina.

Southern beech (Nothofagaceae) fossil leaves from the Río Turbio Formation (Eocene–?Oligocene), Santa Cruz Province, Argentina.

Aptian–Albian Cupressaceae (sensu stricto) woods from Cañadón Asfalto Basin, Patagonia Argentina

Upper Jurassic, Upper Cretaceous and Palaeocene conifer woods from Mexico

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