Ptychopariida

Maotunia semiplectra

Order Ptychopariida / Suborder Ptychopariina / Superfamily Ptychoparioidea / Family Proasaphiscidae

Wuliuan (Miaolingian, Cambrian)Liaoning

Maotunia semiplectra — photo 1 — Photo 1 · Type specimen figures (1 internal mould, 2 external mould; Liaoning; Zhang et al., 1987) Literature specimen figure (Liaoning; Zhang et al., Literature specimen figure (Liaoning; Zhang et al., 1987) 1987)

Maotunia semiplectra — photo 2 — Photo 2 · Type specimen figures (1 internal mould, 2 external mould; Liaoning; Zhang et al., 1987) Literature specimen figure (Liaoning; Zhang et al., Literature specimen figure (Liaoning; Zhang et al., 1987) 1987)

Maotunia semiplectra — photo 3 — Photo 3 · Type specimen figures (1 internal mould, 2 external mould; Liaoning; Zhang et al., 1987) Literature specimen figure (Liaoning; Zhang et al., Literature specimen figure (Liaoning; Zhang et al., 1987) 1987)

Classification

Order Ptychopariida / Suborder Ptychopariina / Superfamily Ptychoparioidea / Family Proasaphiscidae

Genus

Maotunia Zhang & Jell, 1987

Genus author

Zhang Wentang & Jell P. A.

Genus etymology

Maotun, a locality, Maotun, Fuzhouwan, Liaoning, type locality of the type species

Species

M. semiplectra Zhang & Jell, 1987

Species author

Zhang Wentang & Jell P. A.

Species etymology

semi-, Latin, half; plectra, plectrum, Latin, a plectrum. Describing the broad wedge-shaped posterior extension at the sagittal line of the anterior border.

Age

Wuliuan (Miaolingian, Cambrian)

Distribution

Liaoning

Synonyms

Asaphiscus iddingsi; Anomocarella rara; A. truncata; Szeaspis iddingsi

Diagnosis

Glabella large, slightly constricted anteriorly with flatly rounded front; anterior border short and upturned with a broad wedge-shaped posterior extension on the sagittal line; 4 pairs of glabellar furrows (cuticle exfoliated); occipital ring with a small median node; preglabellar field narrow but longitudinally longer than the anterior border; fixigenae rather narrow; palpebral lobes long, arcuate; librigenae wide with long genal spines. Thorax of 11 segments; pleural furrows deep, pleural spines short. Pygidium large, semicircular, posterior margin distinctly concave medially; a gap between the end of the axis and the posterior border, connected by a postaxial ridge; border narrow and flat.

Remarks

This species is the type species of the genus Maotunia.