Agnostida

Rhaptagnostus changshanensis

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Diplagnostidae

Cambrian, Furongian Stage 10Zhejiang, Hunan, Guizhou

Rhaptagnostus changshanensis — photo 1 — Photo 1 · Cephalon, NIGP 61550 Holotype (Zhejiang; Illustrated specimens NIGP 95017 (Hunan; Peng Complete dorsal shield (Guizhou; Lu et al., Peng Shanchi 2020) Shanchi 2020) 1990) Complete dorsal Complete dorsal shield (Zhejiang; shield strongZJU) (Zhejiang; Baishui)

Rhaptagnostus changshanensis — photo 2 — Photo 2 · Cephalon, NIGP 61550 Holotype (Zhejiang; Illustrated specimens NIGP 95017 (Hunan; Peng Complete dorsal shield (Guizhou; Lu et al., Peng Shanchi 2020) Shanchi 2020) 1990) Complete dorsal Complete dorsal shield (Zhejiang; shield strongZJU) (Zhejiang; Baishui)

Rhaptagnostus changshanensis — photo 3 — Photo 3 · Cephalon, NIGP 61550 Holotype (Zhejiang; Illustrated specimens NIGP 95017 (Hunan; Peng Complete dorsal shield (Guizhou; Lu et al., Peng Shanchi 2020) Shanchi 2020) 1990) Complete dorsal Complete dorsal shield (Zhejiang; shield strongZJU) (Zhejiang; Baishui)

Rhaptagnostus changshanensis — photo 4 — Photo 4 · Cephalon, NIGP 61550 Holotype (Zhejiang; Illustrated specimens NIGP 95017 (Hunan; Peng Complete dorsal shield (Guizhou; Lu et al., Peng Shanchi 2020) Shanchi 2020) 1990) Complete dorsal Complete dorsal shield (Zhejiang; shield strongZJU) (Zhejiang; Baishui)

Rhaptagnostus changshanensis — photo 5 — Photo 5 · Cephalon, NIGP 61550 Holotype (Zhejiang; Illustrated specimens NIGP 95017 (Hunan; Peng Complete dorsal shield (Guizhou; Lu et al., Peng Shanchi 2020) Shanchi 2020) 1990) Complete dorsal Complete dorsal shield (Zhejiang; shield strongZJU) (Zhejiang; Baishui)

Rhaptagnostus changshanensis — photo 6 — Photo 6 · Cephalon, NIGP 61550 Holotype (Zhejiang; Illustrated specimens NIGP 95017 (Hunan; Peng Complete dorsal shield (Guizhou; Lu et al., Peng Shanchi 2020) Shanchi 2020) 1990) Complete dorsal Complete dorsal shield (Zhejiang; shield strongZJU) (Zhejiang; Baishui)

Rhaptagnostus changshanensis — photo 7 — Photo 7 · Cephalon, NIGP 61550 Holotype (Zhejiang; Illustrated specimens NIGP 95017 (Hunan; Peng Complete dorsal shield (Guizhou; Lu et al., Peng Shanchi 2020) Shanchi 2020) 1990) Complete dorsal Complete dorsal shield (Zhejiang; shield strongZJU) (Zhejiang; Baishui)

Rhaptagnostus changshanensis — photo 8 — Photo 8 · Cephalon, NIGP 61550 Holotype (Zhejiang; Illustrated specimens NIGP 95017 (Hunan; Peng Complete dorsal shield (Guizhou; Lu et al., Peng Shanchi 2020) Shanchi 2020) 1990) Complete dorsal Complete dorsal shield (Zhejiang; shield strongZJU) (Zhejiang; Baishui)

Classification

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Diplagnostidae

Genus

Rhaptagnostus Whitehouse, 1936

Genus author

Whitehouse F. W.

Genus etymology

rhapt, Greek, seam; Agnostus, a trilobite genus name.

Species

R. changshanensis Lu & Lin, 1980

Species author

Lu Yanhao, Lin Huanling

Species etymology

Changshan, Changshan, Zhejiang, the type locality.

Age

Cambrian, Furongian Stage 10

Distribution

Zhejiang, Hunan, Guizhou

Diagnosis

Cephalon and pygidium greatly effaced; border furrows of moderate width and depth; cephalic dorsal furrow obscure; preglabellar median furrow weak to distinct; glabella faintly outlined, terminal end pointed, median node distinct. The Axial node of one thoracic segment distinct. Dorsal furrow of the anterior axial ring of the pygidium distinct, of the posterior axial ring weak; lateral margin with a pair of small posterolateral spines.

Remarks

Typical body length about 0.2-1.5 cm.