Leclercqia complexa gen. et sp. nov., a new Lycopod from the late middle devonian of eastern New York

Banks, Harlan P.; Bonamo, Patricia M.; Grierson, James D.

doi:10.1016/0034-6667(72)90005-x

Cited by 107 publications

(44 citation statements)

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“…In the above drepanophycalean genera, the sporangia are not aggregated in distinct cones/strobili, but are positioned along the upright shoots and interspersed between the leaf-like appendages (Lang and Cookson, 1935;Hueber, 1992;Kerp et al, 2013). Leclercqia complexa was described by Banks et al (1972) to have groups of sporophylls alternating with vegetative leaves and thus sporophylls was presumed to occur in zones intercalated between zones of vegetative leaves. Wuxia bistrobilata bears both terminal strobili and intercalary cone-like structures, the latter of which are located at dichotomies of the axes, with branches emerging distally from the cone-like structures .…”

Section: The Periodicity Of Reproductive Growth Is Rare and Only Wellmentioning

confidence: 99%

“…Besides Monilistrobus Wang et Berry and Huperzia, the presence of intercalary fertile zones, some being shown as cone-like structures, has been recorded in several species of the extant Selaginella Beauvois (Valdespino, 1993) and possibly in the extant Isoetes Linnaeus (Bateman, 1992), as well as in many fossil taxa such as Baragwanathia longifolia Rothwell (Lang and Cookson, 1935;Banks et al, 1972;DiMichele et al, 1979;Pigg and Rothwell, 1983;Hueber, 1992;Berry et al, 2003;Kerp et al, 2013).…”

Section: Introductionmentioning

confidence: 97%

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Periodicity of reproductive growth in lycopsids: An example from the Upper Devonian of Zhejiang Province, China

et al. 2016

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Section: The Periodicity Of Reproductive Growth Is Rare and Only Wellmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Periodicity of reproductive growth in lycopsids: An example from the Upper Devonian of Zhejiang Province, China

et al. 2016

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“…ips, 1968 Banks et al, 1972Streel, 1972 mid to late Givetian Bonamo & Banks, 1966Andrews et al, 1975Andrews et al, 1974McGregor S Camfield, 1976Gensel et al, 1975Granoff et al, 1976Hueber, 1964Banks et al, 1975Hueber, 1968Lang, 1931Gensel, 1976Pettitt, 1970Hopping, 1956 Hueber , …”

Section: Andrews S Phillmentioning

confidence: 98%

Devonian miospores of North America

McGregor

1979

Palynology

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“…However Leclercqia complexa a Middle Devonian homosporous ligulate herbaceous lycophyte with 5-tipped leaves (Banks et al, 1972) lacks such elements and shows a transition series in the metaxylem from reticulate to multiseriate round, oval and elongate rounded pits (Grierson, 1976). In contrast Minarodendron cathaysiense (Fig.…”

Section: Ig) Fhylogenetic Significance Of Tracheary Thickeningsmentioning

confidence: 99%

Cells and tissues in the vegetative sporophytes of early land plants

Edwards

1993

New Phytologist

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SUMMARY Remarkable preservation in coalified and pennineralized fossils from Upper Silurian and Lower Devonian sediments deposited some 420 to 390 million years ago provides insight into the major anatomical innovations associated with the early stages in the colonization of the land by higher plants. Using uniformitarian principles, such information, combined with gross morphology, can then be used to reconstruct the pioneers as growing, metabolizing and reproducing organisms, as well as allowing assessment of affinity, although apart from the lycophytes, they have no close relationship with extant groups. In considering vascular tissues, diversity is exemplified by descriptions of the metaxylem in protosteles of Zosterophyllopsida and Drepanophycopsida (putative lycophytes), of Psilophyton (Trimerophytopsida), of the Rhyniaceae (including Rhynia gwynnevaughanii, certain Taeniocrada spp., Sennicaulis) and of Cooksonia pertoni, a Lower Devonian representative of the organization found in the oldest pteridophyte‐like land plants. Aglaophyton major is included as a plant with bryophyte‐like vascular tissues in a branching sporophyte with cuticle, stomata and intercellular space system typical of the homoiohydric tracheophyte. In all water‐conducting cells, interpretation of the primary and secondary wall results from comparisons involving the anatomy and chemistry of extant examples and an understanding of taphonomic processes. Phloem is only rarely preserved and usually identified from its position around the xylem. In contrast, dermal features are better known, because of penetration of the resilient cuticle between epidermal cells. They appear conservative. Thus stomata with two guard cells look remarkably similar to extant forms in surface view, and by consideration of their relationship with surrounding epidermal cells and of extent of cuticularization, seem to have operated in a similar way to those in certain mosses and ferns. Cuticular ornamentation (papillae, striations) and epidermal outgrowths (unicellular and multicellular) are described and their adaptive significance conjectured. Ground tissue systems are best preserved in Rhynie Chert permineralizations where zonation of the cortex is tentatively related to photosynthetic and structural roles. The latter function is also attributed to thick‐walled, outer cortical cells recorded in many zosterophylls and in Psilophyton, although the chemical nature of the walls themselves remains equivocal. Problems of identification of roots in plants possessing axial organization with exarch xylem, and in leafy plants with smooth lateral branching systems are briefly addressed. Finally axis apices in Rhynia givynne‐vaughanii and sections showing stages in the maturation of Asteroxylon stems are described from the Rhynie Chert.

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Leclercqia complexa gen. et sp. nov., a new Lycopod from the late middle devonian of eastern New York

Cited by 107 publications

References 3 publications

Periodicity of reproductive growth in lycopsids: An example from the Upper Devonian of Zhejiang Province, China

Periodicity of reproductive growth in lycopsids: An example from the Upper Devonian of Zhejiang Province, China

Devonian miospores of North America

Cells and tissues in the vegetative sporophytes of early land plants

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