<i>Xylopteris</i>(Frenguelli) Stipanicic &amp; Bonetti in the Middle-Upper Triassic (Santa Maria Formation) of Brazil

Barboni, Ronaldo; Dutra, Tânia Lindner; Faccini, Ubiratan Ferrucio

doi:10.5710/amgh.11.07.2016.2897

Cited by 18 publications

(5 citation statements)

References 50 publications

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“…The studied outcrop was previously correlated with the type section of the Passo das Tropas Member (Guerra-Sommer et al, 1999), due to its proximity, the sedimentary facies, and the composition of the Dicroidium Flora previously published (Barboni & Dutra, 2015;Barboni et al, 2016). The paleoflora registered were Xylopteris sp., Baiera, Sphenobaiera, and Ginkgo-related fertile forms, which extended the Passo das Tropas Member to the Carnian, being assigned to the Ladinian-Carnian boundary, Passo das Tropas Member, Santa Maria Formation, of the Paraná Basin (Barboni & Dutra, 2015;Barboni et al, 2016).…”

Section: Geological Settingmentioning

confidence: 84%

“…The paleoecological conditions, such as the seasonal climate reported for Gondwana in continental basins worldwide (Artabe et al, 2007;Cantrill et al, 1995; Elliot, 1975), could be factors related to the building of communities of deciduous and xerophytic paleoflora (Barboni et al, 2016), which may increase leaf abscission rate in that paleoenvironment in a specific season. This means that the presence of galling insects may have some association with the Dicroidietum zuberi xylopterosum (xerophytic woodland) proposed by Retallack (1977) for Australasia.…”

Section: Factors That May Have Influenced Gall Presence In Past Envirmentioning

confidence: 99%

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Record of gall abundance as a possible episode of radiation and speciation of galling insects, Triassic, Southern Brazil

Cenci

Adami-Rodrigues

2017

Rev. bras. paleontol.

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A possible episode of coevolution between galling insects and plants is reported. It was identified by a high infestation (density) of fossil gall found on the compressed Dicroidium Flora from the Triassic (Ladinian-Carnian) Passo das Tropas Member, Santa Maria Formation, Paraná Basin. The galls were found on phytofossils in 2.2 m thick mudstones with horizontal lamination, intercalated between coarse and medium-grained sandstones with clasts and cross-lamination at the base and top of the section. The associations were identified with a stereomicroscope, after which they were quantified within each botanical group, along with their type, in order to calculate the average number of galls per leaf (density). The overall density found was 4.018. Corystospermales was the predominant botanical group (87.81%), with a gall density of 4.281, followed by Ginkgoales, Equisetales, and Incertae sedis. Current ecological studies indicate that a xerophytic paleoenvironment correlates with high infestations of galling insects. However, many taphonomic, biological, and ecological factors may be involved, resulting in different hypotheses from the same data. On the other hand, they support the interpretations of this record in other aspects discussed. Furthermore, the identified gall density can be interpreted from a paleobiogeographical perspective, showing dispersion at low altitudes and intermediate subtropical latitudes (25º to 38º S or N).

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Section: Geological Settingmentioning

confidence: 84%

Section: Factors That May Have Influenced Gall Presence In Past Envirmentioning

confidence: 99%

Record of gall abundance as a possible episode of radiation and speciation of galling insects, Triassic, Southern Brazil

Cenci

Adami-Rodrigues

2017

Rev. bras. paleontol.

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“…As it is usually the case in Gondwanan sites, insects were associated with abundant plant remains of the Dicroidium flora (e.g., corystosperms, ginkgophytes, cycadophytes, sphenophytes, conifers) (Guerra-Sommer & Cazzulo-Klepzig, 2000;Cenci, 2013;Corrêa, 2014;Röhn et al, 2014;Barboni & Dutra, 2015;Barboni et al, 2016). The biota de-veloped on fluvial-deltaic plains under favorable climatic conditions (Pires & Guerra-Sommer, 2004;Crisafulli & Dutra, 2009;.…”

Section: Early Mesozoic Times (Middle-late Triassicmentioning

confidence: 98%

Late Paleozoic–Early Mesozoic Insects: State of the Art on Paleoentomological Studies in Southern South America

Lara¹,

Cariglino²,

Zavattieri³

2023

Ameghiniana

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A state of the art of the insects collected and described from different Permian and Triassic units in South America is given, accompanied by their brief historical record (e.g., collectors, taxonomic revision) and new high-quality photos in color. Likewise, we succinctly provide data on the paleodiversity and paleoecology of the entomological assemblages from the different units. Finally, we discuss the South American paleoentomological records in relation to equivalent deposits worldwide. The thorough, updated review of fossil insect faunas in this paper will help settling the bases for future taxonomic, diversity, and ecological studies during a time that comprised the evolutionary history of insects through two key episodes of the geological record: the end-Permian mass extinction (EPME, ~252 Ma) and the Carnian Pluvial Event (CPE, ~234-232 Ma).

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“…1943, Tetraptilon FRENG. 1950, or Hoegia TOWNROW 1957(see, e.g., FRENGUELLI 1942, 1943ARTABE 1990;BARBONI et al 2016;ANDERSON et al 2019b). The second approach is to unite all such leaf forms under a single genus (Dicroidium) based on their consistent association with This issue is complicated by the uncertain diagnostic significance of macro-versus micromorphological features in those cases in which cuticles are preserved (see, e.g., THOMAS 1933;JONES & DE JERSEY 1947;JACOB & JACOB 1950;TOWNROW 1957;ARCHANGELSKY 1968;ANDERSON & ANDERSON 1983;BOMFLEUR & KERP 2010;PATTEMORE 2016;MARTÍNEZ et al 2020;DROVANDI et al in press), and also by several cases of apparent hybridization between taxa (ANDERSON & ANDERSON 1983).…”

Section: Table Of Contentsmentioning

confidence: 99%

Mummified Dicroidium (Umkomasiales) leaves and reproductive organs from the Upper Triassic of South Australia

Unverfärth¹,

McLoughlin²,

Bomfleur³

2022

palb

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The Leigh Creek Coal Measures incorporate unusually low-rank coals from the Upper Triassic of South Australia. Associated fluvio-lacustrine deposits contain well-preserved, partly mummified plant remains dominated by corystosperm seed ferns. The assemblage comprises seven species of Dicroidium, including D. odontopteroides, D. lineatum, D. dubium, D. zuberi, and Dicroidium spp. A, B and C, and associated reproductive organs, including various fragments of cupulate structures (Umkomasia sp. cf. U. quadripartita and Fanerotheca sp. cf. F. waldeckiformis) and pollen organs (Pteruchus africanus), all having excellent cuticle preservation. Based on a comprehensive analysis of more than 550 individual specimens, we (1) document diagnostic epidermal and cuticular features for foliage and reproductive organs, (2) provide an identification key for the Dicroidium species present, and (3) infer affiliations between reproductive organs and particular leaf species based on correspondence in epidermal anatomy and cuticle micromorphology and on mutual-occurrence data. Collectively, the Leigh Creek material contributes towards a more robust and realistic systematic classification of Umkomasiaceae, offers a rare chance for whole-plant reassembly of individual species, and refines reconstruction of the Dicroidiumdominated forest ecosystems in the middle to high latitudes of the Late Triassic greenhouse world.

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Xylopteris(Frenguelli) Stipanicic & Bonetti in the Middle-Upper Triassic (Santa Maria Formation) of Brazil

Cited by 18 publications

References 50 publications

Record of gall abundance as a possible episode of radiation and speciation of galling insects, Triassic, Southern Brazil

Record of gall abundance as a possible episode of radiation and speciation of galling insects, Triassic, Southern Brazil

Late Paleozoic–Early Mesozoic Insects: State of the Art on Paleoentomological Studies in Southern South America

Mummified Dicroidium (Umkomasiales) leaves and reproductive organs from the Upper Triassic of South Australia

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