Agnostida

Proagnostus bulbus bulbus

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Ammagnostidae

Cambrian, Miaolingian, GuzhangianHunan; USA, Greenland, Siberia, Australia
Proagnostus bulbus bulbus — photo 1
Photo 1 · MGUH 17.126, 17.128 Lectotype USNM SNIIGGiMS 459/3 UTGD124994 94867 (USA; Whittington et al., 1997) (Greenland; Whittington et al., (Siberia; Pegel 2000) (Australia; Jago et al., 2004) 1997) Illustrated specimens NIGP 123881、123884、123886、123887、12388 (Hunan; Peng Shanchi 2020)
Proagnostus bulbus bulbus — photo 2
Photo 2 · MGUH 17.126, 17.128 Lectotype USNM SNIIGGiMS 459/3 UTGD124994 94867 (USA; Whittington et al., 1997) (Greenland; Whittington et al., (Siberia; Pegel 2000) (Australia; Jago et al., 2004) 1997) Illustrated specimens NIGP 123881、123884、123886、123887、12388 (Hunan; Peng Shanchi 2020)
Proagnostus bulbus bulbus — photo 3
Photo 3 · MGUH 17.126, 17.128 Lectotype USNM SNIIGGiMS 459/3 UTGD124994 94867 (USA; Whittington et al., 1997) (Greenland; Whittington et al., (Siberia; Pegel 2000) (Australia; Jago et al., 2004) 1997) Illustrated specimens NIGP 123881、123884、123886、123887、12388 (Hunan; Peng Shanchi 2020)
Proagnostus bulbus bulbus — photo 4
Photo 4 · MGUH 17.126, 17.128 Lectotype USNM SNIIGGiMS 459/3 UTGD124994 94867 (USA; Whittington et al., 1997) (Greenland; Whittington et al., (Siberia; Pegel 2000) (Australia; Jago et al., 2004) 1997) Illustrated specimens NIGP 123881、123884、123886、123887、12388 (Hunan; Peng Shanchi 2020)
Proagnostus bulbus bulbus — photo 5
Photo 5 · MGUH 17.126, 17.128 Lectotype USNM SNIIGGiMS 459/3 UTGD124994 94867 (USA; Whittington et al., 1997) (Greenland; Whittington et al., (Siberia; Pegel 2000) (Australia; Jago et al., 2004) 1997) Illustrated specimens NIGP 123881、123884、123886、123887、12388 (Hunan; Peng Shanchi 2020)
Proagnostus bulbus bulbus — photo 6
Photo 6 · MGUH 17.126, 17.128 Lectotype USNM SNIIGGiMS 459/3 UTGD124994 94867 (USA; Whittington et al., 1997) (Greenland; Whittington et al., (Siberia; Pegel 2000) (Australia; Jago et al., 2004) 1997) Illustrated specimens NIGP 123881、123884、123886、123887、12388 (Hunan; Peng Shanchi 2020)
Proagnostus bulbus bulbus — photo 7
Photo 7 · MGUH 17.126, 17.128 Lectotype USNM SNIIGGiMS 459/3 UTGD124994 94867 (USA; Whittington et al., 1997) (Greenland; Whittington et al., (Siberia; Pegel 2000) (Australia; Jago et al., 2004) 1997) Illustrated specimens NIGP 123881、123884、123886、123887、12388 (Hunan; Peng Shanchi 2020)
Classification
Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Ammagnostidae
Genus
Proagnostus Butts, 1926
Genus author
Butts C.
Genus etymology
pro-, before, forward; Agnostus, a trilobite genus name.
Species
P. bulbus bulbus Butts, 1926
Species author
Butts C.
Species etymology
bulbus, Latin, bulb, sphere.
Age
Cambrian, Miaolingian, Guzhangian
Distribution
Hunan; USA, Greenland, Siberia, Australia
Synonyms
Homagnostus fussus
Diagnosis
Glabella cylindrical, frontal lobe subrectangular, anterior end rounded, terminal end of posterior lobe subacutely rounded; median node long, at the front of the posterior lobe; glabellar transverse furrow straight; preglabellar median furrow distinct. Pygidial axis stout and long, terminal terminal end close to the border furrow; median node large; a small node on the posterior part of the posterior axial ring; border furrow deep; no pygidial posterolateral spines.
Remarks
Typical body length about 0.2-1.0 cm.