A system of form-genera for the upper palaeozoic lepidophyte stems represented by compression-impression material

Thomas, Barry A.; Meyen, Sergei V.

doi:10.1016/0034-6667(84)90049-6

Cited by 55 publications

(19 citation statements)

References 4 publications

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“…The stems of Haplostigma furquei and Malanzania nana are preserved as external molds or casts (Schopf 1975) in medium-to coarse-grained sandstones. The description of the gross morphology is according to Thomas and Meyen (1984). The material was photographed with a Nikon D100 digital camera using oblique illumination and polarised light to enhance the contrast.…”

Section: Methodsmentioning

confidence: 99%

Lycopsids from the Upper Devonian of northern Chile with remarks on the geographical distribution of the morphogenus Haplostigma Seward

2011

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We here present the first systematic description of Devonian plant fossils from Chile. The material was collected from the Upper Devonian El Toco Formation in the Coastal Cordillera of northern Chile. Plant fossils occur as impressions of lycopsid axes in marine turbiditic greywacke beds and comprise Haplostigma furquei (Frenguelli) Gutiérrez, Malanzania cf. nana Archangelsky, Azcuy and Wagner, and further unidentifiable remains. The biostratigraphic ranges of these taxa agree well with previous age assessments for this sequence, based on conodonts and radiometric data. Haplostigma was widely distributed in the middle-to-high latitude, cool-temperate biome of southern Gondwana, providing further evidence that Middle to Late Devonian extra-tropical floras of Gondwana were dominated by low-diversity associations of herbaceous lycopsids.

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Section: Methodsmentioning

confidence: 99%

Lycopsids from the Upper Devonian of northern Chile with remarks on the geographical distribution of the morphogenus Haplostigma Seward

2011

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“…Conslituem-se objelivos do presenle trabalho identificar os troncos horizontalizados e as bases em posiryao de crescimento reJacionando-os a urn grupo determinado dentre as Lycophyta. Thomas & Meyen ( 1984), reconhecendo as dificuldades de identifica~ao de ramos isolados de licofitas prcservados como impressOes e comprcssOcs do Paleoz6 ico Superior e prcvendo a prolifera~ao generica que pode oconer nestes casos, estabelcceram um sistema baseado em caracteristicas morfol6gicas bern definidas. como a morfologia das almofadas, que e cons iderada importante na ca ra c t er i za~ao .…”

unclassified

“…No preseote estudo, os caracteres taxonomicos considerados importantes quando da defini~ao dos morfogeneros (caules isolados), sao aqueles expressos porThomas & Meyen (1984). Dadas as caracteristicas do material aqui estudado, com morfologia Icpidodendr6ide, apresentando 0 sistema de fixa~ao conn6ide, e pcla ausencia de estruturas reprodutivas em canedo organica.…”

unclassified

Licófitas Cormofíticas Arborescentes do Afloramento Quitéria Formação do Rio Bonito (Bacia do Paraná), RS

Jasper¹,

Guerra-Sommer

1998

Pesq Geoc

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This study reports on a in situ lycopod assemblage of stumps and trunks from a sand-rich coaly section of the Rio Bonito Formation (Artinskian – Kungurian) in Rio Grande do Sul state. These dense tickets of arborescent forms have been found in situ; their cormose rooting systems are “non stigmarioid”. The variation observed, from elliptical (Brasilodendron type) to rhomboidal (Lycopodiopsis type) leaf cushion in the same specimen indicates that both can represent different levels in the same trunk. Considering that the South Brazilian coals are mainly hipoautochthonous, lycopods of Brasilodendron type could be dominants in the plant forming association of the peat.

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“…(Doubinger et al 1995, figs 17-19), which has similarly large leaf cushions but lacking the lateral lines seen in the Velebit Mts specimen. The type of Vetter's species appears to show persistent leaves and so should not be regarded as a Lepidodendron as interpreted by Thomas & Meyen (1984). Until better material is uncovered, the Velebit Mts specimens are best referred to simply as (?…”

Section: Genusmentioning

confidence: 99%

Pennsylvanian fossil flora from the Velebit Mountains and Lika region (SW Croatia)

Cleal¹,

Tenchov²,

Sremac³

et al. 2015

Bull. Geosci.

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A system of form-genera for the upper palaeozoic lepidophyte stems represented by compression-impression material

Cited by 55 publications

References 4 publications

Lycopsids from the Upper Devonian of northern Chile with remarks on the geographical distribution of the morphogenus Haplostigma Seward

Lycopsids from the Upper Devonian of northern Chile with remarks on the geographical distribution of the morphogenus Haplostigma Seward

Licófitas Cormofíticas Arborescentes do Afloramento Quitéria Formação do Rio Bonito (Bacia do Paraná), RS

Pennsylvanian fossil flora from the Velebit Mountains and Lika region (SW Croatia)

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