Corynexochida

Corynexochus plumula

Order Corynexochida / Suborder Corynexochina / Family Corynexochidae

Cambrian, Miaolingian, Guzhangian to JiangshanianHunan, Xinjiang; Alaska, Australia

Corynexochus plumula — photo 1 — Photo 1 · Holotype (Australia; Whitehouse 1939) Figured specimen (Alaska; Palmer 1968) Illustrated specimens (Hunan; Peng (Hunan; Haiyan) Shanchi 2020) (Hunan; Y.W) (Hunan; Lixia)

Corynexochus plumula — photo 2 — Photo 2 · Holotype (Australia; Whitehouse 1939) Figured specimen (Alaska; Palmer 1968) Illustrated specimens (Hunan; Peng (Hunan; Haiyan) Shanchi 2020) (Hunan; Y.W) (Hunan; Lixia)

Corynexochus plumula — photo 3 — Photo 3 · Holotype (Australia; Whitehouse 1939) Figured specimen (Alaska; Palmer 1968) Illustrated specimens (Hunan; Peng (Hunan; Haiyan) Shanchi 2020) (Hunan; Y.W) (Hunan; Lixia)

Corynexochus plumula — photo 4 — Photo 4 · Holotype (Australia; Whitehouse 1939) Figured specimen (Alaska; Palmer 1968) Illustrated specimens (Hunan; Peng (Hunan; Haiyan) Shanchi 2020) (Hunan; Y.W) (Hunan; Lixia)

Corynexochus plumula — photo 5 — Photo 5 · Holotype (Australia; Whitehouse 1939) Figured specimen (Alaska; Palmer 1968) Illustrated specimens (Hunan; Peng (Hunan; Haiyan) Shanchi 2020) (Hunan; Y.W) (Hunan; Lixia)

Corynexochus plumula — photo 6 — Photo 6 · Holotype (Australia; Whitehouse 1939) Figured specimen (Alaska; Palmer 1968) Illustrated specimens (Hunan; Peng (Hunan; Haiyan) Shanchi 2020) (Hunan; Y.W) (Hunan; Lixia)

Classification

Order Corynexochida / Suborder Corynexochina / Family Corynexochidae

Genus

Corynexochus Angelin, 1854

Genus author

Angelin N. P.

Genus etymology

coryn-, Greek, club; exoch-, Greek, protruding, raised

Species

C. plumula Whitehouse, 1939

Species author

Whitehouse F. W.

Species etymology

plum-, feather

Age

Cambrian, Miaolingian, Guzhangian to Jiangshanian

Distribution

Hunan, Xinjiang; Alaska, Australia

Diagnosis

Glabella broad and short, rapidly expanding forward, with three pairs of obscure glabellar furrows; Occipital ring long medially; Proparian facial suture; Palpebral lobe small, located near the glabella; Free cheek extremely small. Thorax of 6 segments; Axis and pleural lobes subequal in width; Pleural furrow broad and deep, pleural spines short and pointed. Pygidium nearly semicircular; Pygidial axis with three rings plus a terminal segment; Pleural region with broad, deep pleural furrows, with two to three pleural ridges; Border indistinct.