Phacopida

Kailia intersulcata

Order Phacopida / Suborder Cheirurina / Superfamily Cheiruroidea / Family Encrinuridae / Subfamily Coronocephalinae

Telychian (Llandovery, Silurian)Sichuan, Anhui

Kailia intersulcata — photo 1 — Photo 1 · Type specimen figures (Sichuan; Zhang Nearly complete dorsal 1983) exoskeleton (Anhui; Shitou Li De Yu) Thoracic-rib malformed specimen (Anhui; Nearly complete dorsal exoskeleton Nearly complete dorsal exoskeleton Zong 2021) (Anhui; Qianli Zhijiang) (Anhui; Edwin)

Kailia intersulcata — photo 2 — Photo 2 · Type specimen figures (Sichuan; Zhang Nearly complete dorsal 1983) exoskeleton (Anhui; Shitou Li De Yu) Thoracic-rib malformed specimen (Anhui; Nearly complete dorsal exoskeleton Nearly complete dorsal exoskeleton Zong 2021) (Anhui; Qianli Zhijiang) (Anhui; Edwin)

Kailia intersulcata — photo 3 — Photo 3 · Type specimen figures (Sichuan; Zhang Nearly complete dorsal 1983) exoskeleton (Anhui; Shitou Li De Yu) Thoracic-rib malformed specimen (Anhui; Nearly complete dorsal exoskeleton Nearly complete dorsal exoskeleton Zong 2021) (Anhui; Qianli Zhijiang) (Anhui; Edwin)

Kailia intersulcata — photo 4 — Photo 4 · Type specimen figures (Sichuan; Zhang Nearly complete dorsal 1983) exoskeleton (Anhui; Shitou Li De Yu) Thoracic-rib malformed specimen (Anhui; Nearly complete dorsal exoskeleton Nearly complete dorsal exoskeleton Zong 2021) (Anhui; Qianli Zhijiang) (Anhui; Edwin)

Kailia intersulcata — photo 5 — Photo 5 · Type specimen figures (Sichuan; Zhang Nearly complete dorsal 1983) exoskeleton (Anhui; Shitou Li De Yu) Thoracic-rib malformed specimen (Anhui; Nearly complete dorsal exoskeleton Nearly complete dorsal exoskeleton Zong 2021) (Anhui; Qianli Zhijiang) (Anhui; Edwin)

Kailia intersulcata — photo 6 — Photo 6 · Type specimen figures (Sichuan; Zhang Nearly complete dorsal 1983) exoskeleton (Anhui; Shitou Li De Yu) Thoracic-rib malformed specimen (Anhui; Nearly complete dorsal exoskeleton Nearly complete dorsal exoskeleton Zong 2021) (Anhui; Qianli Zhijiang) (Anhui; Edwin)

Classification

Order Phacopida / Suborder Cheirurina / Superfamily Cheiruroidea / Family Encrinuridae / Subfamily Coronocephalinae

Genus

Kailia Zhang, 1974

Genus author

Zhang Wentang

Genus etymology

Kaili, Kaili, Guizhou, one of the localities

Species

K. intersulcata Zhang, 1974

Species author

Zhang Wentang

Species etymology

inter- (Latin, between) + sulc- (Latin, furrow), referring to the median furrow on the anterior glabellar lobe

Age

Telychian (Llandovery, Silurian)

Distribution

Sichuan, Anhui

Diagnosis

Entire dorsal surface smooth, gonatoparian facial sutures. Glabella flatly convex, rapidly expanding forward, inverted-bell-shaped, constricted posteriorly; anterior glabellar lobe wide, semi-elliptical, with a median furrow; 4 pairs of glabellar furrows, almost none crossing the glabella; occipital ring straight, longitudinally narrow and transversely wide; occipital furrow deep; dorsal furrows narrow and deep; fixigenae narrow; palpebral lobes medium; librigenae subtriangular. Thorax of 11 segments; axis slightly narrower than pleurae, wider medially. Pygidium medium-sized, triangular; axis tapering gradually; more than 20 axial rings, the ring furrows, except the anterior two, disconnected medially; at least 10 pleural segments with rather deep pleural furrows; border absent.