Early lycopsid — Leclercqia ?complexa

Geologic period: Early to Middle Devonian

Age: Leclercqia complexa is documented from Devonian rocks, including Early Devonian Emsian occurrences and classic Middle Devonian material.

Feeding: Photosynthetic plant.

Locomotion: Not applicable.

Body plan: Slender branching vascular plant with helically arranged forked leaves.

Evidence: Stem and leaf morphology are directly preserved. The question mark in the Smithsonian identification must be retained because the exhibit inventory itself signals uncertainty in the species assignment.

Why it matters: Leclercqia helps document the early diversification of lycopsids, one of the oldest surviving lineages of vascular land plants.

Plain Language Identity: An early lycopsid, tentatively identified in the Smithsonian inventory as Leclercqia complexa.

What You Are Looking At: Fossil stems and distinctive divided leaves from an early member of the lycopsid lineage.

Ecosystem: Early terrestrial Devonian vegetation.

Preservation: Plant compression or carbonized stem-and-leaf fossil.

Open Questions: Do not silently remove the tentative identification or present the Smithsonian specimen as unquestionably Leclercqia complexa.

Source Urls: https://naturalhistory.si.edu/visit/virtual-tour/current-exhibits/deep-time-virtual-tour-fossil-list; https://www.sciencedirect.com/science/article/abs/pii/S0034666706001345; https://bsapubs.onlinelibrary.wiley.com/doi/10.1002/j.1537-2197.1979.tb06248.x

Enrichment Method: SAGE curated research pass; title and scientific name matched; evidence separated from inference

Scientific name: Leclercqia ?complexa

Evidence / representation: comparative_exact_taxon_visual

comparative_exact_taxon_visual

Life Conquers the Land: Forests, Fishes and the First Four-Legged Worlds.

Media license: CC BY-SA 2.0

https://creativecommons.org/licenses/by-sa/2.0