Redlichiida

Yiliangella forficula

Order Redlichiida / Suborder Redlichiina / Superfamily Redlichioidea / Family Gigantopygidae

Cambrian, Series 2, Stage 3Yunnan, Sichuan, Shaanxi

Yiliangella forficula — photo 1 — Photo 1 · Type specimen (1 is the holotype; Yunnan; Zhang Reconstruction Complete dorsal shield Wentang 1966) (drawn by Zhuoyi) (Yunnan; Guodong) Complete dorsal shield (Yunnan; Complete dorsal shield, part and Chengbei Baigong) counterpart (Yunnan; Pengcheng Jianke)

Yiliangella forficula — photo 2 — Photo 2 · Type specimen (1 is the holotype; Yunnan; Zhang Reconstruction Complete dorsal shield Wentang 1966) (drawn by Zhuoyi) (Yunnan; Guodong) Complete dorsal shield (Yunnan; Complete dorsal shield, part and Chengbei Baigong) counterpart (Yunnan; Pengcheng Jianke)

Yiliangella forficula — photo 3 — Photo 3 · Type specimen (1 is the holotype; Yunnan; Zhang Reconstruction Complete dorsal shield Wentang 1966) (drawn by Zhuoyi) (Yunnan; Guodong) Complete dorsal shield (Yunnan; Complete dorsal shield, part and Chengbei Baigong) counterpart (Yunnan; Pengcheng Jianke)

Yiliangella forficula — photo 4 — Photo 4 · Type specimen (1 is the holotype; Yunnan; Zhang Reconstruction Complete dorsal shield Wentang 1966) (drawn by Zhuoyi) (Yunnan; Guodong) Complete dorsal shield (Yunnan; Complete dorsal shield, part and Chengbei Baigong) counterpart (Yunnan; Pengcheng Jianke)

Yiliangella forficula — photo 5 — Photo 5 · Type specimen (1 is the holotype; Yunnan; Zhang Reconstruction Complete dorsal shield Wentang 1966) (drawn by Zhuoyi) (Yunnan; Guodong) Complete dorsal shield (Yunnan; Complete dorsal shield, part and Chengbei Baigong) counterpart (Yunnan; Pengcheng Jianke)

Classification

Order Redlichiida / Suborder Redlichiina / Superfamily Redlichioidea / Family Gigantopygidae

Genus

Yiliangella Chang, 1966

Genus author

Zhang Wentang

Genus etymology

Yiliang;-ella

Species

Y. forficula Chang, 1966

Species author

Zhang Wentang

Species etymology

forficula, Latin, scissors-shaped, referring to the form of the pygidium

Age

Cambrian, Series 2, Stage 3

Distribution

Yunnan, Sichuan, Shaanxi

Synonyms

Yiliangella leshanensis; Yiliangella longa

Diagnosis

Dorsal shield elongate-oval. Cephalon semicircular; cranidium sub-trapezoidal; glabella conical, convex, rounded anteriorly, with three pairs of shallow, broad glabellar furrows; occipital furrow shallow and broad, occipital ring with a node; opistho parian sutures, anterior branches short, posterior branches long; fixed cheek rather narrow, posterior limb broad and long; eye ridge obliquely directed, palpebral lobe rather small; anterior border furrow shallow, inner border absent or extremely narrow; free cheek broad, genal spine rather long. Thorax of 16 segments, each axial ring bearing a small node, pleural spines lengthening from front to back. Pygidium small, axis convex and cylindrical, divided into two segments, with two pairs of long pleural spines extending backward from two pairs of ribs, the two outermost ones large and long.

Remarks

This species is the type species of Yiliangella.