Phacopida

Kailia lata

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

Telychian (Llandovery, Silurian)Hubei, Chongqing, Hunan

Kailia lata — photo 1 — Photo 1 · Complete dorsal Type specimen figures (cranidium is the holotype; Hubei; exoskeleton Wu Hongji 1979) (Chongqing; Baishui) Nearly complete dorsal exoskeleton Nearly complete (Chongqing; Baishui) dorsal exoskeleton (Chongqing; Edwin)

Kailia lata — photo 2 — Photo 2 · Complete dorsal Type specimen figures (cranidium is the holotype; Hubei; exoskeleton Wu Hongji 1979) (Chongqing; Baishui) Nearly complete dorsal exoskeleton Nearly complete (Chongqing; Baishui) dorsal exoskeleton (Chongqing; Edwin)

Kailia lata — photo 3 — Photo 3 · Complete dorsal Type specimen figures (cranidium is the holotype; Hubei; exoskeleton Wu Hongji 1979) (Chongqing; Baishui) Nearly complete dorsal exoskeleton Nearly complete (Chongqing; Baishui) dorsal exoskeleton (Chongqing; Edwin)

Kailia lata — photo 4 — Photo 4 · Complete dorsal Type specimen figures (cranidium is the holotype; Hubei; exoskeleton Wu Hongji 1979) (Chongqing; Baishui) Nearly complete dorsal exoskeleton Nearly complete (Chongqing; Baishui) dorsal exoskeleton (Chongqing; Edwin)

Kailia lata — photo 5 — Photo 5 · Complete dorsal Type specimen figures (cranidium is the holotype; Hubei; exoskeleton Wu Hongji 1979) (Chongqing; Baishui) Nearly complete dorsal exoskeleton Nearly complete (Chongqing; Baishui) dorsal exoskeleton (Chongqing; Edwin)

Kailia lata — photo 6 — Photo 6 · Complete dorsal Type specimen figures (cranidium is the holotype; Hubei; exoskeleton Wu Hongji 1979) (Chongqing; Baishui) Nearly complete dorsal exoskeleton Nearly complete (Chongqing; Baishui) dorsal exoskeleton (Chongqing; 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

Kailia lata Wu, 1979

Species author

Wu Hongji

Species etymology

lata, Latin, wide, possibly referring to the very wide anterior glabellar lobe

Age

Telychian (Llandovery, Silurian)

Distribution

Hubei, Chongqing, Hunan

Synonyms

Kailia (Parakailia) lata; Kailia (Parakailia) curvata

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; 4 pairs of extremely short wedge-shaped glabellar furrows, none crossing the glabella, forming serrate lateral margins of the glabella; occipital ring straight, longitudinally narrow and transversely wide; occipital furrow narrower and shallower than the dorsal furrows; dorsal furrows wide and deep; fixigenae narrow with a regular denticulate inner margin beside the glabella; posterior border furrow wide and shallow; palpebral lobes small, flatly convex; librigenae subtriangular with flatly convex borders. Thorax of 11 segments; axis slightly narrower than pleurae, wider medially; pleurae tapering posteriorly. Pygidium small, triangular; axis tapering gradually; more than 20 axial rings, the ring furrows, except the anterior two, disconnected medially; at least 6 pleural segments with rather deep pleural furrows; border absent.