Corynexochida

Meitanillaenus binodosus

Order Corynexochida / Suborder Illaenina / Superfamily Illaenoidea / Family Illaenidae

Silurian, Llandovery, Rhuddanian to AeronianGuizhou

Meitanillaenus binodosus — photo 1 — Photo 1 · Holotype (Guizhou; Wei et al.,2025) (Guizhou; Wei et al.,2025)

Meitanillaenus binodosus — photo 2 — Photo 2 · Holotype (Guizhou; Wei et al.,2025) (Guizhou; Wei et al.,2025)

Meitanillaenus binodosus — photo 3 — Photo 3 · Holotype (Guizhou; Wei et al.,2025) (Guizhou; Wei et al.,2025)

Classification

Order Corynexochida / Suborder Illaenina / Superfamily Illaenoidea / Family Illaenidae

Genus

Meitanillaenus Chang, 1974

Genus author

Zhang Wentang

Genus etymology

Meitan;Illaenus, trilobitegenus name, Illaenus

Species

M. binodosus Chang, 1974

Species author

Zhang Wentang

Species etymology

bi-, two; nodosus, nodose, tuberculate. Referring to the pair of node-like swellings at the constriction of the dorsal furrow

Age

Silurian, Llandovery, Rhuddanian to Aeronian

Distribution

Guizhou

Diagnosis

Cranidium nearly square; dorsal furrow distinct posteriorly, expanding and shallowing forward and outward, with a pair of node-like swellings at the strongest constriction. Thorax of 10 segments; axis nearly as wide as the pleurae. Pygidial axi s short, subtriangular, axial furrows shallow and indistinct.

Remarks

This species is the type species of Meitanillaenus.