Corynexochida

Blackwelderia sinensis

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

Guzhangian (Miaolingian, Cambrian)Shandong, Liaoning and other parts of North China

Blackwelderia sinensis — photo 1 — Photo 1 · specimens Type specimens, cephalon B designated lectotype (Shandong; Peng Cephalon and pygidium et al., 2004) specimen (Shandong; Baishui)

Blackwelderia sinensis — photo 2 — Photo 2 · specimens Type specimens, cephalon B designated lectotype (Shandong; Peng Cephalon and pygidium et al., 2004) specimen (Shandong; Baishui)

Blackwelderia sinensis — photo 3 — Photo 3 · specimens Type specimens, cephalon B designated lectotype (Shandong; Peng Cephalon and pygidium et al., 2004) specimen (Shandong; Baishui)

Classification

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

Genus

Blackwelderia Walcott, 1906

Genus author

Walcott C. D.

Genus etymology

Blackwelder, a surname, referring to E. Blackwelder, an early-20th-century collector of North China trilobite

Species

B. sinensis (Bergeron, 1899)

Species author

Bergeron J.

Species etymology

sin-, Greek, China; referring to the species occurring in China

Age

Guzhangian (Miaolingian, Cambrian)

Distribution

Shandong, Liaoning and other parts of North China

Synonyms

Calymene? Sinensis; Olenoides leblanci; Stephanocare sinensis; Teinistion sodeni; Blackwelderia tschanghsingensis

Diagnosis

Cranidium trapezoidal; glabella truncate-conical, convex, with three pairs of glabellar furrows; preglabellar field narrow; anterior border wide. Pygidial axis long-conical; border with 7 pairs of subequal pygidial spines.

Remarks

Commonly known as the "butterfly stone".