Ptychopariida

Ctenopyge (Ctenopyge) ahlbergi

Order Ptychopariida / Suborder Olenina / Family Olenidae

Stage 10 (Furongian, Cambrian)Sweden

Ctenopyge (Ctenopyge) ahlbergi — photo 1 — Photo 1 · Linnarsson, 1880 Restoration (Clarkson et al., 2003) Literature specimen (A left, LO 8976T, is the holotype; Sweden; Clarkson et al., Literature specimen (Sweden; Clarkson et al., 2003) 2003)

Ctenopyge (Ctenopyge) ahlbergi — photo 2 — Photo 2 · Linnarsson, 1880 Restoration (Clarkson et al., 2003) Literature specimen (A left, LO 8976T, is the holotype; Sweden; Clarkson et al., Literature specimen (Sweden; Clarkson et al., 2003) 2003)

Ctenopyge (Ctenopyge) ahlbergi — photo 3 — Photo 3 · Linnarsson, 1880 Restoration (Clarkson et al., 2003) Literature specimen (A left, LO 8976T, is the holotype; Sweden; Clarkson et al., Literature specimen (Sweden; Clarkson et al., 2003) 2003)

Classification

Order Ptychopariida / Suborder Olenina / Family Olenidae

Genus

Ctenopyge, subgenus Ctenopyge (Ctenopyge)

Genus author

Linnarsson J. G. O.

Genus etymology

cteno-, Greek, comb; -pyge, tail

Species

C. (C.) ahlbergi Clarkson, Ahlgren & Taylor, 2003

Species author

Clarkson E. N. K., Ahlgren J. & Taylor C. M.

Species etymology

In honour of Prof. Per Ahlberg, a colleague of the authors

Age

Stage 10 (Furongian, Cambrian)

Distribution

Sweden

Diagnosis

Cephalon wide; cranidium trapezoidal; glabella subrectangular with two pairs of glabellar furrows, S2 faint; a small occipital spine present medially on the occipital ring; eyes large; eye ridges long; fixigenae wide in the palpebral area; librigenae wide, genal Spines stout and long, arranged in a circle. Thorax of 10 segments; axis narrow, segments 1-9 with node-like spines, segment 10 with a long axial spine; pleural furrows distinct, pleural spines long and arranged in an arc, tapering posteriorly. Pygidium small, triangular; a slender spine present in the middle.

Remarks

Body length about 0.5-1 cm.