Corynexochida

Balangia balangensis

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocarinae

Cambrian, Series 2, Stage 4Guizhou, Hunan

Balangia balangensis — photo 1 — Photo 1 · Type specimen (Guizhou; Qian Ontogenetic sequence reconstruction (Chen Yiyuan 1961) et al., 2023) Figured specimen (Guizhou; Chen et al., 2022) Figured specimen (Guizhou; Qin Qin Complete dorsal shield 2010) (Hunan; Guapi)

Balangia balangensis — photo 2 — Photo 2 · Type specimen (Guizhou; Qian Ontogenetic sequence reconstruction (Chen Yiyuan 1961) et al., 2023) Figured specimen (Guizhou; Chen et al., 2022) Figured specimen (Guizhou; Qin Qin Complete dorsal shield 2010) (Hunan; Guapi)

Balangia balangensis — photo 3 — Photo 3 · Type specimen (Guizhou; Qian Ontogenetic sequence reconstruction (Chen Yiyuan 1961) et al., 2023) Figured specimen (Guizhou; Chen et al., 2022) Figured specimen (Guizhou; Qin Qin Complete dorsal shield 2010) (Hunan; Guapi)

Balangia balangensis — photo 4 — Photo 4 · Type specimen (Guizhou; Qian Ontogenetic sequence reconstruction (Chen Yiyuan 1961) et al., 2023) Figured specimen (Guizhou; Chen et al., 2022) Figured specimen (Guizhou; Qin Qin Complete dorsal shield 2010) (Hunan; Guapi)

Balangia balangensis — photo 5 — Photo 5 · Type specimen (Guizhou; Qian Ontogenetic sequence reconstruction (Chen Yiyuan 1961) et al., 2023) Figured specimen (Guizhou; Chen et al., 2022) Figured specimen (Guizhou; Qin Qin Complete dorsal shield 2010) (Hunan; Guapi)

Balangia balangensis — photo 6 — Photo 6 · Type specimen (Guizhou; Qian Ontogenetic sequence reconstruction (Chen Yiyuan 1961) et al., 2023) Figured specimen (Guizhou; Chen et al., 2022) Figured specimen (Guizhou; Qin Qin Complete dorsal shield 2010) (Hunan; Guapi)

Classification

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocarinae

Genus

Balangia Chien, 1961

Genus author

Qian Yiyuan

Genus etymology

balang, Balang, Duyun, Guizhou, the type locality

Species

B. balangensis Chien, 1961

Species author

Qian Yiyuan

Species etymology

Balang, Balang, Duyun, Guizhou, the type locality

Age

Cambrian, Series 2, Stage 4

Distribution

Guizhou, Hunan

Diagnosis

Isopygous trilobite, body small, oval. Cephalon semicircular; Cranidium raised upward, subsquare; Dorsal furrow shallow; Glabella broad cylindrical, sides nearly parallel; Three pairs of glabellar Furrows, all indistinct; Occipital furrow weak, horizontal; Occipital ring narrow; Palpebral lobe relatively large, curved and raised, about half the glabellar length; Gonatoparian facial suture, anterior branch long, posterior branch relatively short; Free cheek small, without genal spine. Thorax of 4 segments; Axis raised, distal end of pleural segment rounded, pleural furrow deep, contracting outward. Pygidium as large as cephalon, semicircular, pygidial axis with about eight to nine rings, pygidial axis slightly broader, sharply tapering backward into a triangle; with a flat narrow pygidial border.

Remarks

This species is the type species of Balangia.