Ptychopariida

Amzasskiella sanduensis

Order Ptychopariida / Suborder Ptychopariina / Superfamily Ptychoparioidea / Family Papyriaspididae

Stage 10 (Furongian, Cambrian) to Tremadocian (EarlyGuizhou, Hunan

Amzasskiella sanduensis — photo 1 — Photo 1 · Holotype NIGP 59107 (Guizhou; Peng 2020) (Hunan; Haiyan) (Guizhou; Peng 2020) (Hunan; Haiyan)

Amzasskiella sanduensis — photo 2 — Photo 2 · Holotype NIGP 59107 (Guizhou; Peng 2020) (Hunan; Haiyan) (Guizhou; Peng 2020) (Hunan; Haiyan)

Amzasskiella sanduensis — photo 3 — Photo 3 · Holotype NIGP 59107 (Guizhou; Peng 2020) (Hunan; Haiyan) (Guizhou; Peng 2020) (Hunan; Haiyan)

Amzasskiella sanduensis — photo 4 — Photo 4 · Holotype NIGP 59107 (Guizhou; Peng 2020) (Hunan; Haiyan) (Guizhou; Peng 2020) (Hunan; Haiyan)

Classification

Order Ptychopariida / Suborder Ptychopariina / Superfamily Ptychoparioidea / Family Papyriaspididae

Genus

Amzasskiella Poletaeva in Khalfin, 1960

Genus author

Poletaeva O. K.

Genus etymology

None

Species

A. sanduensis (Lu & Qian in Zhou et al. 1977)

Species author

Lu Yanhao & Qian Yiyuan

Species etymology

Sandu, Sandu, Guizhou

Age

Stage 10 (Furongian, Cambrian) to Tremadocian (Early

Distribution

Guizhou, Hunan

Synonyms

Ordovician) Triplacephalus sanduensis; Triplacephalus elongatus

Diagnosis

Cranidium subtrapezoidal; glabella narrow and short with straight anterior margin and 3 pairs of glabellar furrows; occipital ring with a median node; palpebral lobes small and node-like; eye ridges long, horizontal or slightly inclined upward; anterior border ridge-like, forming a broad W shape; preglabellar field longitudinally long, raised as a hemispherical swelling; fixigenae wide. Thorax with at least 22 segments; each axial ring with an axial node; pleural lobes wide, pleural segments slender with narrow deep pleural furrows. Pygidium unknown.