Agnostida

Tomagnostus perrugatus

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Ptychagnostidae

Cambrian, Miaolingian Wuliuan to DrumianDenmark, Sweden, Canada

Tomagnostus perrugatus — photo 1 — Photo 1 · Holotype MGUH 143 (Denmark; Weidner et al., 2014) (Canada; Hildenbrand et al., 2021) (Canada; Hildenbrand et al., 2021)

Tomagnostus perrugatus — photo 2 — Photo 2 · Holotype MGUH 143 (Denmark; Weidner et al., 2014) (Canada; Hildenbrand et al., 2021) (Canada; Hildenbrand et al., 2021)

Tomagnostus perrugatus — photo 3 — Photo 3 · Holotype MGUH 143 (Denmark; Weidner et al., 2014) (Canada; Hildenbrand et al., 2021) (Canada; Hildenbrand et al., 2021)

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. perrugatus (Grönwall, 1902)

Species author

Gr ö nwall K. A.

Species etymology

per, through, very, all, throughout; rugatus, wrinkled.

Age

Cambrian, Miaolingian Wuliuan to Drumian

Distribution

Denmark, Sweden, Canada

Synonyms

Agnostus fissus var. perrugatus; Agnostus sulcatus

Diagnosis

Compared with the type species Tomagnostus fissus: cephalic furrows denser; glabella and pygidial axis narrower; F3 of glabella straight; pygidium nearly pentagonal, densely wrinkled; pygidial F2 of the axis straight; with pygidial marginal lateral spines.