Agnostida

Goniagnostus spiniger

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Ptychagnostidae

Cambrian, Miaolingian, GuzhangianZhejiang, Hunan; Sweden, Australia

Goniagnostus spiniger — photo 1 — Photo 1 · Cephalon: SGU4963, holotype; CPC14342, 14344 pygidium: SGU4964 (Sweden) (left: line drawing, Westergård (Australia; Laurie 1989) (Zhejiang; Lu Yanhao et al. 1946; right: photograph of 1989) specimen, Laurie 1989) (Hunan; Peng Shanchi 2020) (Zhejiang; (Zhejiang; Baishui) Guodong)

Goniagnostus spiniger — photo 2 — Photo 2 · Cephalon: SGU4963, holotype; CPC14342, 14344 pygidium: SGU4964 (Sweden) (left: line drawing, Westergård (Australia; Laurie 1989) (Zhejiang; Lu Yanhao et al. 1946; right: photograph of 1989) specimen, Laurie 1989) (Hunan; Peng Shanchi 2020) (Zhejiang; (Zhejiang; Baishui) Guodong)

Goniagnostus spiniger — photo 3 — Photo 3 · Cephalon: SGU4963, holotype; CPC14342, 14344 pygidium: SGU4964 (Sweden) (left: line drawing, Westergård (Australia; Laurie 1989) (Zhejiang; Lu Yanhao et al. 1946; right: photograph of 1989) specimen, Laurie 1989) (Hunan; Peng Shanchi 2020) (Zhejiang; (Zhejiang; Baishui) Guodong)

Goniagnostus spiniger — photo 4 — Photo 4 · Cephalon: SGU4963, holotype; CPC14342, 14344 pygidium: SGU4964 (Sweden) (left: line drawing, Westergård (Australia; Laurie 1989) (Zhejiang; Lu Yanhao et al. 1946; right: photograph of 1989) specimen, Laurie 1989) (Hunan; Peng Shanchi 2020) (Zhejiang; (Zhejiang; Baishui) Guodong)

Goniagnostus spiniger — photo 5 — Photo 5 · Cephalon: SGU4963, holotype; CPC14342, 14344 pygidium: SGU4964 (Sweden) (left: line drawing, Westergård (Australia; Laurie 1989) (Zhejiang; Lu Yanhao et al. 1946; right: photograph of 1989) specimen, Laurie 1989) (Hunan; Peng Shanchi 2020) (Zhejiang; (Zhejiang; Baishui) Guodong)

Goniagnostus spiniger — photo 6 — Photo 6 · Cephalon: SGU4963, holotype; CPC14342, 14344 pygidium: SGU4964 (Sweden) (left: line drawing, Westergård (Australia; Laurie 1989) (Zhejiang; Lu Yanhao et al. 1946; right: photograph of 1989) specimen, Laurie 1989) (Hunan; Peng Shanchi 2020) (Zhejiang; (Zhejiang; Baishui) Guodong)

Goniagnostus spiniger — photo 7 — Photo 7 · Cephalon: SGU4963, holotype; CPC14342, 14344 pygidium: SGU4964 (Sweden) (left: line drawing, Westergård (Australia; Laurie 1989) (Zhejiang; Lu Yanhao et al. 1946; right: photograph of 1989) specimen, Laurie 1989) (Hunan; Peng Shanchi 2020) (Zhejiang; (Zhejiang; Baishui) Guodong)

Classification

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Ptychagnostidae

Genus

Goniagnostus Howell, 1935

Genus author

Howell B. F.

Genus etymology

gon, goniatus, angular, angled; Agnostus, a trilobite genus name.

Species

G. spiniger (Westergård, 1931)

Species author

Westerg å rd A. H.

Species etymology

spin-, Latin, needle, spine; -ger, bearing.

Age

Cambrian, Miaolingian, Guzhangian

Distribution

Zhejiang, Hunan; Sweden, Australia

Synonyms

Agnostus nathorsti spiniger; Goniagnostus cf. longispinus; Ptychagnostus(Goniagnostus)cf. longispinus; P.(G.) longispinus megispinus; P.(G.)spiniger; Goniagnostus bicavus multinodus; G. G. longispinus

Diagnosis

Compared with the type species Goniagnostus nathorsti: surface nodes larger; cephalic and pygidial posterolateral spines longer; pygidial axis more distinctly transversely tripartite; postaxial median furrow deeper.