Corynexochida

Pseudoblackwelderia lubrica

Order Corynexochida / Suborder Leiostegiina / Superfamily Dameselloidea / Family Damesellidae / Subfamily Damesellinae

Guzhangian (Miaolingian, Cambrian)Anhui

Pseudoblackwelderia lubrica — photo 1 — Photo 1 · Restorations; the two pygidial morphs represent sexual Cephalon is the holotype HIT3093 (Anhui; Qiu Hongan et al. 1983) dimorphism (Lei et al., 2023) Cephalon, pygidium and librigena specimens (Anhui; Lei et al., 2023)

Pseudoblackwelderia lubrica — photo 2 — Photo 2 · Restorations; the two pygidial morphs represent sexual Cephalon is the holotype HIT3093 (Anhui; Qiu Hongan et al. 1983) dimorphism (Lei et al., 2023) Cephalon, pygidium and librigena specimens (Anhui; Lei et al., 2023)

Pseudoblackwelderia lubrica — photo 3 — Photo 3 · Restorations; the two pygidial morphs represent sexual Cephalon is the holotype HIT3093 (Anhui; Qiu Hongan et al. 1983) dimorphism (Lei et al., 2023) Cephalon, pygidium and librigena specimens (Anhui; Lei et al., 2023)

Classification

Order Corynexochida / Suborder Leiostegiina / Superfamily Dameselloidea / Family Damesellidae / Subfamily Damesellinae

Genus

Pseudoblackwelderia Zhu & Zhang in Qiu et al., 1983

Genus author

Zhu Zhaoling & Zhang Quanzhong

Genus etymology

pseudo-, Greek, false; Blackwelderia, a trilobite genus name

Species

P. lubrica Zhu & Zhang in Qiu et al., 1983

Species author

Zhu Zhaoling & Zhang Quanzhong

Species etymology

lubrica, Latin, smooth

Age

Guzhangian (Miaolingian, Cambrian)

Distribution

Anhui

Diagnosis

Cranidium trapezoidal; glabella conical with constricted front and three pairs of glabellar furrows; occipital furrow straight, occipital ring wide medially; preglabellar field absent; anterior border furrow deeply impressed; anterior border prominently raised as a ridge; eyes of medium size, eye ridges faint or indistinguishable; librigenae transversely wide, lateral border narrowing forward into a prominent ridge, genal spines long. Pygidium inverted-trapezoidal; axis conical with four axial rings and a terminal piece; first pair of pleural furrows deeper; 6-7 pairs of marginal spines, the anterior five pairs short and small, the sixth pair stout and long, the seventh pair small or absent.

Remarks

This species is the type species of the genus Pseudoblackwelderia.