Transverse Lotus (Nelumbo transversa)

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Nelumbo transversa: Extinct Prehistoric Lotus Species

Prehistoric wetlands of the Northern Hemisphere once harbored the extinct aquatic species Nelumbo transversa. Paleobotanical evidence indicates that this ancestral lotus thrived during warmer global climates in the Late Cretaceous and Paleogene periods. Fossilized leaf impressions and reproductive structures help scientists reconstruct ancient freshwater ecosystems.

Scientific studies of this species contribute significantly to our understanding of the evolutionary history of the genus Nelumbo. The preservation of its remains in coal-bearing strata suggests a preference for quiet, shallow water bodies with muddy substrates.

Taxonomy

  • ∟ царство Plantae
  • ∟ division Tracheophytes (Vascular Plants)
  • ∟ subdivision Spermatophytes (Seed plants)
  • ∟ Angiosperms
  • ∟ mesangiosperms (Core angiosperms)
  • ∟ eudicots
  • ∟ order Proteales (Protea order)
  • ∟ family Nelumbonaceae (Lotus family)
  • ∟ genus Nelumbo (Lotus genus)
  • ∟ species Nelumbo transversa (Transverse Lotus)

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Morphology

Fossil remains reveal that Nelumbo transversa possessed large, peltate leaves with a centrally attached petiole. The leaf margins were smooth and circular, resembling modern lotus leaves but showing distinct venation patterns. Actively branching secondary veins extended from the center to the outer edges in a characteristic actinodromous pattern.

  • Leaf Architecture: Peltate, centrally attached petioles, reaching diameters of up to 30 centimeters.
  • Venation: Strong primary veins radiating from the center, bifurcating near the margins.
  • Rhizomes: Slender underground stems adapted for anchoring in soft lacustrine sediments.

Applications

Scientific analysis represents the primary application for this extinct species. Paleobotanists utilize fossilized specimens of Nelumbo transversa to conduct biostratigraphic dating and reconstruct paleoenvironmental conditions. These fossils serve as key indicators of subtropical to warm-temperate climates in ancient high-latitude regions.

Interesting facts

Fossils of this ancient plant are frequently discovered alongside prehistoric turtles and crocodilians, suggesting a rich aquatic biodiversity in its habitat. The water-repellent micro-texture characteristic of modern lotus leaves was likely already present in Nelumbo transversa, helping prevent water accumulation on the leaf surface.

Geography of distribution

  • États-Unis (fossile)

Sources

  • Global Biodiversity Information Facility (GBIF) fossil records.
  • International Fossil Plant Names Registry (IFPNR).
  • Paleobotanical databases and literature on Nelumbonaceae fossils.

Technical Information

External Databases: GBIF

See also

Sacred lotus

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Shokkouren Lotus

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Nelumbo ʽShokkouren’

An exquisite Japanese sacred lotus cultivar renowned for its deep red-pink semi-double blossoms and robust …

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