Agnostida

Distagnostus celatus

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Agnostidae

Cambrian, Furongian Jiangshanian to Stage 10Hunan, Zhejiang

Distagnostus celatus — photo 1 — Photo 1 · NIGP94935 Illustrated Enrolled pyritized specimen specimen s (Hunan; Peng Shanchi 2020) (Zhejiang; strongZJU) (Hunan; Peng Shanchi 2020) Complete dorsal shield, Complete dorsal shield, 7.5 2.5 mm, 5 mm (Zhejiang; Baishui) mm, 8.5 mm (Zhejiang; strongZJU)

Distagnostus celatus — photo 2 — Photo 2 · NIGP94935 Illustrated Enrolled pyritized specimen specimen s (Hunan; Peng Shanchi 2020) (Zhejiang; strongZJU) (Hunan; Peng Shanchi 2020) Complete dorsal shield, Complete dorsal shield, 7.5 2.5 mm, 5 mm (Zhejiang; Baishui) mm, 8.5 mm (Zhejiang; strongZJU)

Distagnostus celatus — photo 3 — Photo 3 · NIGP94935 Illustrated Enrolled pyritized specimen specimen s (Hunan; Peng Shanchi 2020) (Zhejiang; strongZJU) (Hunan; Peng Shanchi 2020) Complete dorsal shield, Complete dorsal shield, 7.5 2.5 mm, 5 mm (Zhejiang; Baishui) mm, 8.5 mm (Zhejiang; strongZJU)

Distagnostus celatus — photo 4 — Photo 4 · NIGP94935 Illustrated Enrolled pyritized specimen specimen s (Hunan; Peng Shanchi 2020) (Zhejiang; strongZJU) (Hunan; Peng Shanchi 2020) Complete dorsal shield, Complete dorsal shield, 7.5 2.5 mm, 5 mm (Zhejiang; Baishui) mm, 8.5 mm (Zhejiang; strongZJU)

Distagnostus celatus — photo 5 — Photo 5 · NIGP94935 Illustrated Enrolled pyritized specimen specimen s (Hunan; Peng Shanchi 2020) (Zhejiang; strongZJU) (Hunan; Peng Shanchi 2020) Complete dorsal shield, Complete dorsal shield, 7.5 2.5 mm, 5 mm (Zhejiang; Baishui) mm, 8.5 mm (Zhejiang; strongZJU)

Distagnostus celatus — photo 6 — Photo 6 · NIGP94935 Illustrated Enrolled pyritized specimen specimen s (Hunan; Peng Shanchi 2020) (Zhejiang; strongZJU) (Hunan; Peng Shanchi 2020) Complete dorsal shield, Complete dorsal shield, 7.5 2.5 mm, 5 mm (Zhejiang; Baishui) mm, 8.5 mm (Zhejiang; strongZJU)

Distagnostus celatus — photo 7 — Photo 7 · NIGP94935 Illustrated Enrolled pyritized specimen specimen s (Hunan; Peng Shanchi 2020) (Zhejiang; strongZJU) (Hunan; Peng Shanchi 2020) Complete dorsal shield, Complete dorsal shield, 7.5 2.5 mm, 5 mm (Zhejiang; Baishui) mm, 8.5 mm (Zhejiang; strongZJU)

Classification

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Agnostidae

Genus

Distagnostus Shergold, 1972

Genus author

Shergold J. H.

Genus etymology

dist, distalis, far away; Agnostus, a trilobite genus name.

Species

D. celatus Peng, 1992

Species author

Peng Shanchi

Species etymology

celatus, Latin, hidden.

Age

Cambrian, Furongian Jiangshanian to Stage 10

Distribution

Hunan, Zhejiang

Diagnosis

Glabella and pygidial axis strongly effaced. Cephalic border fine ridge-like; border furrow shallow; after exfoliation of the cuticle, a very weak F3 and small triangular basal lobes are faintly visible. At the anterior quarter of the pygidium with a relatively large round axial node and a smaller terminal node at the posterior fifth; border coarsely ridge-like; after exfoliation of the cuticle the anterior axial ring (M1+M2) is weakly tripartite.