Ptychopariida

Proasaphiscus yabei

Order Ptychopariida / Suborder Ptychopariina / Superfamily Ptychoparioidea / Family Proasaphiscidae

Wuliuan (Miaolingian, Cambrian)Liaoning, Shandong and North China
Proasaphiscus yabei — photo 1
Photo 1 · Type specimen (Liaoning; Zhang et al., Restoration (Zhang Literature specimen figures (Liaoning; 1987) Wentang 1959) Kobayashi 1962) Complete dorsal Specimen preserving the digestive system (~5 cm, exoskeleton Shandong; Baishui) (Shandong; Baishui)
Proasaphiscus yabei — photo 2
Photo 2 · Type specimen (Liaoning; Zhang et al., Restoration (Zhang Literature specimen figures (Liaoning; 1987) Wentang 1959) Kobayashi 1962) Complete dorsal Specimen preserving the digestive system (~5 cm, exoskeleton Shandong; Baishui) (Shandong; Baishui)
Proasaphiscus yabei — photo 3
Photo 3 · Type specimen (Liaoning; Zhang et al., Restoration (Zhang Literature specimen figures (Liaoning; 1987) Wentang 1959) Kobayashi 1962) Complete dorsal Specimen preserving the digestive system (~5 cm, exoskeleton Shandong; Baishui) (Shandong; Baishui)
Proasaphiscus yabei — photo 4
Photo 4 · Type specimen (Liaoning; Zhang et al., Restoration (Zhang Literature specimen figures (Liaoning; 1987) Wentang 1959) Kobayashi 1962) Complete dorsal Specimen preserving the digestive system (~5 cm, exoskeleton Shandong; Baishui) (Shandong; Baishui)
Proasaphiscus yabei — photo 5
Photo 5 · Type specimen (Liaoning; Zhang et al., Restoration (Zhang Literature specimen figures (Liaoning; 1987) Wentang 1959) Kobayashi 1962) Complete dorsal Specimen preserving the digestive system (~5 cm, exoskeleton Shandong; Baishui) (Shandong; Baishui)
Proasaphiscus yabei — photo 6
Photo 6 · Type specimen (Liaoning; Zhang et al., Restoration (Zhang Literature specimen figures (Liaoning; 1987) Wentang 1959) Kobayashi 1962) Complete dorsal Specimen preserving the digestive system (~5 cm, exoskeleton Shandong; Baishui) (Shandong; Baishui)
Proasaphiscus yabei — photo 7
Photo 7 · Type specimen (Liaoning; Zhang et al., Restoration (Zhang Literature specimen figures (Liaoning; 1987) Wentang 1959) Kobayashi 1962) Complete dorsal Specimen preserving the digestive system (~5 cm, exoskeleton Shandong; Baishui) (Shandong; Baishui)
Proasaphiscus yabei — photo 8
Photo 8 · Type specimen (Liaoning; Zhang et al., Restoration (Zhang Literature specimen figures (Liaoning; 1987) Wentang 1959) Kobayashi 1962) Complete dorsal Specimen preserving the digestive system (~5 cm, exoskeleton Shandong; Baishui) (Shandong; Baishui)
Classification
Order Ptychopariida / Suborder Ptychopariina / Superfamily Ptychoparioidea / Family Proasaphiscidae
Genus
Proasaphiscus Resser & Endo in Kobayashi, 1935
Genus author
Resser C. E. & Endo R
Genus etymology
pro-, before, forward; Asaphiscus, a trilobite genus name
Species
P. yabei Resser & Endo in Kobayashi, 1935
Species author
Resser C. E. & Endo R
Species etymology
Yabe, a Japanese surname
Age
Wuliuan (Miaolingian, Cambrian)
Distribution
Liaoning, Shandong and North China
Diagnosis
Dorsal shield long-ovate, smooth. Cephalon semicircular; border wide and flat; at the genal angle the border merges with the genal spine, which extends rather far backward with a wide base; cranidium subsquare; glabella rather large, truncate-conical, with three pairs of glabellar furrows; fixigenae about half the glabellar width; palpebral lobes narrow and rather long; eye ridges low, extending obliquely to the anterior lateral corner of the glabella. Thorax of 11 segments; axis gently convex, slightly narrower than pleurae; pleural spines wide, flat and rather long. Pygidium transversely semicircular; axis gently convex, rather wide, tapering gradually backward; border furrow indistinct, outer border extremely wide.
Remarks
This species is the type species of the genus Proasaphiscus.