Discover a newly described calamite fructification that shows a unique arrangement of sporangia, shedding light on the evolution of ancient plant cones.

This study introduces Mazostachys pendulata as a fresh addition to Pennsylvanian fossil flora. The specimen preserves a cone attached to a Calamites shoot, featuring a cone axis with a distinct pairing of bracts and sporangiophores. Notably, each sporangiophore bears two sporangia in a pendulous position, a feature not seen in some related types. The work also confirms the cones are homosporous, with spores about 60 microns in diameter and a clearly defined contagionis area.
What you’ll find in this edition:

A new genus and species of calamite fructification with a two-sporangia-per-sporangiophore design
Detailed anatomy of the cone axis, node structure, bracts, and sporangiophore arrangement
Comparison with other calamite types to clarify evolutionary relationships
Context for the fossil’s Illinois Pennsylvanian locality and its preservation in ironstone concretions

Ideal for readers of Pennsylvanian fossil plants, coal-field paleobotany, and Illinois geology, this edition provides clear descriptions and plates that illustrate the cone’s structure and its place in plant evolution.

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