Agnostida

Leiagnostus ellipticus

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family uncertain

Cambrian, Furongian Stage 10Zhejiang, Jiangxi

Leiagnostus ellipticus — photo 1 — Photo 1 · Holotype (cephalon) (Zhejiang; Lu et al., (Jiangxi; Lin Tianrui 1986) Complete dorsal shield (Zhejiang; 1984) Huangmomao) Complete dorsal shield (1.1 cm, Complete dorsal shield (0.5 cm, Zhejiang; Complete dorsal shield (1.4 cm, Zhejiang; Y.W) Zhejiang; Baishui) Baishui)

Leiagnostus ellipticus — photo 2 — Photo 2 · Holotype (cephalon) (Zhejiang; Lu et al., (Jiangxi; Lin Tianrui 1986) Complete dorsal shield (Zhejiang; 1984) Huangmomao) Complete dorsal shield (1.1 cm, Complete dorsal shield (0.5 cm, Zhejiang; Complete dorsal shield (1.4 cm, Zhejiang; Y.W) Zhejiang; Baishui) Baishui)

Leiagnostus ellipticus — photo 3 — Photo 3 · Holotype (cephalon) (Zhejiang; Lu et al., (Jiangxi; Lin Tianrui 1986) Complete dorsal shield (Zhejiang; 1984) Huangmomao) Complete dorsal shield (1.1 cm, Complete dorsal shield (0.5 cm, Zhejiang; Complete dorsal shield (1.4 cm, Zhejiang; Y.W) Zhejiang; Baishui) Baishui)

Leiagnostus ellipticus — photo 4 — Photo 4 · Holotype (cephalon) (Zhejiang; Lu et al., (Jiangxi; Lin Tianrui 1986) Complete dorsal shield (Zhejiang; 1984) Huangmomao) Complete dorsal shield (1.1 cm, Complete dorsal shield (0.5 cm, Zhejiang; Complete dorsal shield (1.4 cm, Zhejiang; Y.W) Zhejiang; Baishui) Baishui)

Leiagnostus ellipticus — photo 5 — Photo 5 · Holotype (cephalon) (Zhejiang; Lu et al., (Jiangxi; Lin Tianrui 1986) Complete dorsal shield (Zhejiang; 1984) Huangmomao) Complete dorsal shield (1.1 cm, Complete dorsal shield (0.5 cm, Zhejiang; Complete dorsal shield (1.4 cm, Zhejiang; Y.W) Zhejiang; Baishui) Baishui)

Leiagnostus ellipticus — photo 6 — Photo 6 · Holotype (cephalon) (Zhejiang; Lu et al., (Jiangxi; Lin Tianrui 1986) Complete dorsal shield (Zhejiang; 1984) Huangmomao) Complete dorsal shield (1.1 cm, Complete dorsal shield (0.5 cm, Zhejiang; Complete dorsal shield (1.4 cm, Zhejiang; Y.W) Zhejiang; Baishui) Baishui)

Classification

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family uncertain

Genus

Leiagnostus Jaekel, 1909

Genus author

Jaekel O.

Genus etymology

lei-, Greek, smooth; Agnostus, a trilobite genus name.

Species

L. ellipticus Lu & Lin, 1984

Species author

Lu Yanhao, Lin Huanling

Species etymology

ellipticus, Latin, elliptical.

Age

Cambrian, Furongian Stage 10

Distribution

Zhejiang, Jiangxi

Diagnosis

Surface smooth. Cephalon oval to subsemicircular; glabella effaced, outline visible in some specimens, with small node medially; dorsal furrow more distinct at the base; border narrow, border furrow distinct. Pygidium sub round, pygidial axis effaced, outline visible in some specimens, with three rings, second ring with distinct axial node medially; dorsal furrow more distinct anteriorly; border broad and flat, very small pygidial lateral spines in large individuals.

Remarks

Typical body length about 0.2-1.4 cm.