Agnostida

Pseudagnostus securiger

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Diplagnostidae

Cambrian, Furongian JiangshanianHunan, Zhejiang; UK, Canada, Korea
Pseudagnostus securiger — photo 1
Photo 1 · RBCM-P933, 934 Holotype BGS Illustrated specimens NIGP 57650 95004、95005 (UK; Whittington et al., 1997) (Canada; Chatterton 2020) (Hunan; Peng Shanchi 2020) Complete Complete dorsal shield (Zhejiang; dorsal shield Baishui) (Zhejiang; Guodong)
Pseudagnostus securiger — photo 2
Photo 2 · RBCM-P933, 934 Holotype BGS Illustrated specimens NIGP 57650 95004、95005 (UK; Whittington et al., 1997) (Canada; Chatterton 2020) (Hunan; Peng Shanchi 2020) Complete Complete dorsal shield (Zhejiang; dorsal shield Baishui) (Zhejiang; Guodong)
Pseudagnostus securiger — photo 3
Photo 3 · RBCM-P933, 934 Holotype BGS Illustrated specimens NIGP 57650 95004、95005 (UK; Whittington et al., 1997) (Canada; Chatterton 2020) (Hunan; Peng Shanchi 2020) Complete Complete dorsal shield (Zhejiang; dorsal shield Baishui) (Zhejiang; Guodong)
Pseudagnostus securiger — photo 4
Photo 4 · RBCM-P933, 934 Holotype BGS Illustrated specimens NIGP 57650 95004、95005 (UK; Whittington et al., 1997) (Canada; Chatterton 2020) (Hunan; Peng Shanchi 2020) Complete Complete dorsal shield (Zhejiang; dorsal shield Baishui) (Zhejiang; Guodong)
Pseudagnostus securiger — photo 5
Photo 5 · RBCM-P933, 934 Holotype BGS Illustrated specimens NIGP 57650 95004、95005 (UK; Whittington et al., 1997) (Canada; Chatterton 2020) (Hunan; Peng Shanchi 2020) Complete Complete dorsal shield (Zhejiang; dorsal shield Baishui) (Zhejiang; Guodong)
Pseudagnostus securiger — photo 6
Photo 6 · RBCM-P933, 934 Holotype BGS Illustrated specimens NIGP 57650 95004、95005 (UK; Whittington et al., 1997) (Canada; Chatterton 2020) (Hunan; Peng Shanchi 2020) Complete Complete dorsal shield (Zhejiang; dorsal shield Baishui) (Zhejiang; Guodong)
Pseudagnostus securiger — photo 7
Photo 7 · RBCM-P933, 934 Holotype BGS Illustrated specimens NIGP 57650 95004、95005 (UK; Whittington et al., 1997) (Canada; Chatterton 2020) (Hunan; Peng Shanchi 2020) Complete Complete dorsal shield (Zhejiang; dorsal shield Baishui) (Zhejiang; Guodong)
Pseudagnostus securiger — photo 8
Photo 8 · RBCM-P933, 934 Holotype BGS Illustrated specimens NIGP 57650 95004、95005 (UK; Whittington et al., 1997) (Canada; Chatterton 2020) (Hunan; Peng Shanchi 2020) Complete Complete dorsal shield (Zhejiang; dorsal shield Baishui) (Zhejiang; Guodong)
Classification
Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Diplagnostidae
Genus
Pseudagnostus Jaekel, 1909
Genus author
Jaekel O.
Genus etymology
pseud-, Greek, false; Agnostus, a trilobite genus name.
Species
P. securiger (Lake, 1906)
Species author
Lake P.
Species etymology
secur-, Latin, axe; -ger, bearing.
Age
Cambrian, Furongian Jiangshanian
Distribution
Hunan, Zhejiang; UK, Canada, Korea
Synonyms
Agnostus securiger; Sulcatagnostus securiger; Pseudagnostus (Sulcatagnostus) securiger; Pseudagnostus (Sulcatagnostus) hunanensis; Proagnostus securiger; Pseudagnostus hunanensis
Diagnosis
Cephalon and pygidium round to elongate-oval, border furrows broad and deep, some individuals with surface furrows. Terminal end of glabella subacutely rounded; preglabellar median furrow strong; crossing glabellar furrows straight. Pygidial axial node distinct; Besides a pair of small posterolateral spines, there are also small spines at the middle of the posterior margin.
Remarks
Typical body length about 0.2-1.0 cm.