Agnostida

Utagnostus songae

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Clavagnostidae

Cambrian, Miaolingian, DrumianHunan; USA

Utagnostus songae — photo 1 — Photo 1 · Holotype KUMIP 204542 (USA; Peng et al., 2000) Illustrated specimens (Hunan; Peng et al., (USA; Tang Shi) 2000) Illustrated specimens (USA; Peng et al., 2000)

Utagnostus songae — photo 2 — Photo 2 · Holotype KUMIP 204542 (USA; Peng et al., 2000) Illustrated specimens (Hunan; Peng et al., (USA; Tang Shi) 2000) Illustrated specimens (USA; Peng et al., 2000)

Utagnostus songae — photo 3 — Photo 3 · Holotype KUMIP 204542 (USA; Peng et al., 2000) Illustrated specimens (Hunan; Peng et al., (USA; Tang Shi) 2000) Illustrated specimens (USA; Peng et al., 2000)

Utagnostus songae — photo 4 — Photo 4 · Holotype KUMIP 204542 (USA; Peng et al., 2000) Illustrated specimens (Hunan; Peng et al., (USA; Tang Shi) 2000) Illustrated specimens (USA; Peng et al., 2000)

Classification

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Clavagnostidae

Genus

Utagnostus Robison, 1964

Genus author

Robison R. A.

Genus etymology

ut, possibly from Utah, USA; Agnostus, a trilobite genus name.

Species

U. songae Peng & Robison, 2000

Species author

Peng Shanchi, Robison R. A.

Species etymology

Song, a surname, from Ms. Song Yanping, Robison's graduate student and collector of the type specimens.

Age

Cambrian, Miaolingian, Drumian

Distribution

Hunan; USA

Diagnosis

Glabellar frontal lobe small, posterior lobe cylindrical, sides subparallel, terminal end subacutely rounded; preglabellar median furrow incompletely developed; basal lobe transversely triangular. Pygidial axis gradually tapering backward, terminal end subacutely rounded; median node large, crossing the entire anterior axial ring; posterior axial ring not inflated; with postaxial median furrow; pygidial border very broad, with a pair of lateral marginal spines.