Agnostida

Tomagnostus sibiricus

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Ptychagnostidae

Cambrian, Miaolingian, WuliuanSiberia, Sweden

Tomagnostus sibiricus — photo 1 — Photo 1 · CNIGR, N40 / Weidner et al., 2014) Illustrated specimens (Sweden; Weidner et al., 2014) Illustrated specimens (Sweden; Weidner et al., 2014)

Tomagnostus sibiricus — photo 2 — Photo 2 · CNIGR, N40 / Weidner et al., 2014) Illustrated specimens (Sweden; Weidner et al., 2014) Illustrated specimens (Sweden; Weidner et al., 2014)

Tomagnostus sibiricus — photo 3 — Photo 3 · CNIGR, N40 / Weidner et al., 2014) Illustrated specimens (Sweden; Weidner et al., 2014) Illustrated specimens (Sweden; Weidner et al., 2014)

Classification

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Ptychagnostidae

Genus

Tomagnostus Howell, 1935

Genus author

Howell B. F.

Genus etymology

tom-, Greek, cut; Agnostus, a trilobite genus name.

Species

T. sibiricus Pokrovskaya & Egorova, 1972

Species author

Pokrovskaya N. V. & Egorova L. I.

Species etymology

Sibiricus, Siberian.

Age

Cambrian, Miaolingian, Wuliuan

Distribution

Siberia, Sweden

Diagnosis

Compared with the type species Tomagnostus fissus: dorsal surface smooth; glabella and pygidial axis narrower; anterior pit of glabellar frontal lobe weak, F3 straight.