On the structure of the palæozoic seed,
            <i>Lagenostoma Lomaxi</i>
            , with a statement of the evidence upon which it is referred to
            <i>Lyginodendron</i>
            .

Oliver, F. W.; Scott, D. H.

doi:10.1098/rspl.1904.0002

Cited by 33 publications

(47 citation statements)

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“…However, Callistophytales (Barthel 1962;, cycads (Stevenson 1981), bennettitaleans (Harris 1969) and ginkgos (Harris et al 1974) either lacked hairs or had only simple unicellular or at most two-or three-celled hairs. Other than the 'massive' multicellular glands found in Lyginopteris (Oliver & Scott 1904), Lyginopteridales also had no or just unicellular hairs (Barthel 1962;DiMichele et al 1984;Krings & Schultka 2002).…”

Section: Discussionmentioning

confidence: 98%

The systematic and palaeoecological value of foliage anatomy in Late Palaeozoic medullosalean seed-plants

Cleal

Shute

2012

Journal of Systematic Palaeontology

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This paper reviews the anatomical evidence of medullosalean foliage known from cuticles and coal balls, and discusses what it tells us about the systematics and palaeoecology of the parent plants. Medullosalean foliage shows more diversity in epidermal anatomy than in any other group of gymnospermous seed-plants, especially in the configuration of subsidiary cells around the stomata, the detailed structure of the hairs, and the shapes of the cells. Diagnostic for the order are the fronds typically having dorsiventral pinnules supported by rachises with a dissected stele, resin canals in both rachises and pinnules, and distinctive epidermal hairs consisting of a single row of many cells. Foliage anatomy is of little value for distinguishing medullosalean families but is useful for distinguishing genera and species. Anatomy also provides insights into the autecology of the plants. A number of features previously regarded as xeromorphic are re-interpreted as adaptations to high-humidity conditions (stomata sunken or protected by papillae, papillae on lower surface of leaf). Different species could grow in either shaded or well-illuminated positions, indicated by the absence or presence of a hypodermis below the upper epidermis. Few species show evidence of defensive strategies against herbivory except possibly in juvenile fronds. Evidence from stomatal distribution and structure for determining variation in atmospheric CO 2 is equivocal but may indicate a rise in CO 2 levels in early Stephanian (latest Moscovian) times.

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Section: Discussionmentioning

confidence: 98%

The systematic and palaeoecological value of foliage anatomy in Late Palaeozoic medullosalean seed-plants

Cleal

Shute

2012

Journal of Systematic Palaeontology

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“…Division Pteridospermophyta Oliver and Scott, 1904 Order Peltaspermales Taylor, 1981 Family Peltaspermaceae Thomas, 1932 Genus Lepidopteris Schimper, 1869 Fig. 6).…”

Section: Descriptionmentioning

confidence: 99%

Triassic-Jurassic Flora of Poland; Floristical Support of Climatic Changes

Barbacka¹,

Pacyna²,

Feldman-Olszewska³

et al. 2014

Acta Geologica Polonica

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Plant macroremains from five boreholes in Poland were studied. Two of them (Huta OP-1 and Studzianna) from the northern margin of the Holy Cross Mountains, yielded several taxa. In the other three boreholes determinable fos-sil plants were sporadic, albeit important. Most of the taxa from the Huta OP-1 and Studzianna boreholes are typi-cal of the European Early Jurassic (Hettangian and Sinemurian). Both localities, although close to one another, show incertae sedis, Desmiophyllum harrisii phytes and conifers (a new species incertae sedis, Desmiophyllum harrisii Barbacka et Pacyna is herein proposed), which would suggest rather wet and warm conditions. This flora is typical of the European Province of the Euro-Sinian Region. In Studzianna the Siberian elements dominate, gymnosperms, mainly Czekanowskiales, which in-dicate a drier and colder environment. The palaeobotanical data correspond to the results of clay mineral studies, in particular the kaolinite/illite ratio in the source formations. The kaolinite content confirms a decrease in temperature and a reduction in rainfall in the late Early Hettangian and the latest Hettangian in the area.

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“…The group was established conceptually with the re construction of Lyginopteris by OLIVER and SCOTT (1904) from disarticulated organs in coal balls. As sociated organs from the same permineralized sources were thought to represent parts of the same plant, based on capitate glands and dietyoxylon cortex that oc curred in th e isolated plant parts.…”

Section: Introductionmentioning

confidence: 99%

Studies of Paleozoic Seed Ferns: Additional Studies of Microspermopteris aphyllum Baxter

Pigg¹,

Stockey²,

Taylor³

1986

Botanical Gazette

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The genus Microspermopteris is characterized as a small lyginopterid pteridosperm with a pentarch protostele, irregular cortical ridges, and multicellular trichomes. We describe the frond architecture and vari ability among axillary branches previously unknown for the genus. Fronds are small and delicate, exhibiting three orders of branching. Clasping V-shaped petioles produce primary pinnae alternately to suboppositely from adaxial projections. Primary pinnae in turn produce secondaries that bear two-, three-, or four-lobed ultimate laminar pinnules. Pinnules reconstructed from serial sections are morphologically similar to Sphenopteris-\ike compressions; however, the overall frond is reduced in size and complexity. While some axillary branches produce secondary xylem, others are composed entirely of primary tissues. Some axillary branches produce scalelike leaves in a tight helix; distally, immature buds are surrounded by flattened bud scales. Although Microspermopteris shows similarities to Heterangium in stelar and cortical anatomy, the two taxa are distinct. Microspermopteris is interpreted as a delicate, scrambling vine, liana, or shrublike plant in contrast to the more robust lyginopterids Lvginopteris, Schopfiastrum, and Heterangium.

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On the structure of the palæozoic seed, Lagenostoma Lomaxi , with a statement of the evidence upon which it is referred to Lyginodendron .

Cited by 33 publications

References 0 publications

The systematic and palaeoecological value of foliage anatomy in Late Palaeozoic medullosalean seed-plants

The systematic and palaeoecological value of foliage anatomy in Late Palaeozoic medullosalean seed-plants

Triassic-Jurassic Flora of Poland; Floristical Support of Climatic Changes

Studies of Paleozoic Seed Ferns: Additional Studies of Microspermopteris aphyllum Baxter

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