Asaphida

Malongullia sinensis

Order Asaphida / Superfamily Trinucleoidea / Family Raphiophoridae

Katian (Late Ordovician)Yunnan

Malongullia sinensis — photo 1 — Photo 1 · McLean R. A. Holotype NIGP175922 (Yunnan; Wei et al., 2023) Cranidium specimen NIGP175923 (Yunnan; Wei et al., 2023) Partially weathered surface specimen NIGP175909 (Yunnan; Wei et al., 2023)

Malongullia sinensis — photo 2 — Photo 2 · McLean R. A. Holotype NIGP175922 (Yunnan; Wei et al., 2023) Cranidium specimen NIGP175923 (Yunnan; Wei et al., 2023) Partially weathered surface specimen NIGP175909 (Yunnan; Wei et al., 2023)

Malongullia sinensis — photo 3 — Photo 3 · McLean R. A. Holotype NIGP175922 (Yunnan; Wei et al., 2023) Cranidium specimen NIGP175923 (Yunnan; Wei et al., 2023) Partially weathered surface specimen NIGP175909 (Yunnan; Wei et al., 2023)

Classification

Order Asaphida / Superfamily Trinucleoidea / Family Raphiophoridae

Genus

Malongullia Webby, Moors & McLean, 1970

Genus author

Webby B. D., Moors H. T. &

Genus etymology

The Malongulli Formation, Australia

Species

M. sinensis Wei & Zhou in Wei et al., 2023

Species author

Wei Xin, Zhou Zhiqiang

Species etymology

sin-, Greek, China

Age

Katian (Late Ordovician)

Distribution

Yunnan

Diagnosis

Dorsal shield subcircular. Cephalon semicircular; glabella strongly arched, widest medially, with a median node and a pair of glabellar posterior lobes; lateral lobes large, separated from the glabella by longitudinal furrows; eye tubercles faint, ovate. Thorax of 6 segments; pleural region wide; pleural furrows distinct. Pygidium transversely wide, subtriangular; axis tapering rapidly, reaching the border, with at least eight axial rings; pleural region wide, with five pleural furrows; border widening adaxially.