Asaphida

Niobides armatus

Order Asaphida / Superfamily Asaphoidea / Family Asaphidae

Floian (Early Ordovician)Argentina

Niobides armatus — photo 1 — Photo 1 · Holotype CPBA 3721 (Argentina; Harrington et al., 1957) Restoration (Harrington et al., 1957) (Argentina; Harrington et al., 1957)

Niobides armatus — photo 2 — Photo 2 · Holotype CPBA 3721 (Argentina; Harrington et al., 1957) Restoration (Harrington et al., 1957) (Argentina; Harrington et al., 1957)

Niobides armatus — photo 3 — Photo 3 · Holotype CPBA 3721 (Argentina; Harrington et al., 1957) Restoration (Harrington et al., 1957) (Argentina; Harrington et al., 1957)

Classification

Order Asaphida / Superfamily Asaphoidea / Family Asaphidae

Genus

Niobides Harrington & Leanza, 1957

Genus author

Harrington H. J. & Leanza A. F.

Genus etymology

Niobe, a trilobite genus name; -ides, a Greek noun suffix meaning resembling or related to

Species

N. armatus Harrington & Leanza, 1957

Species author

Harrington H. J. & Leanza A. F.

Species etymology

armatus, armed, equipped

Age

Floian (Early Ordovician)

Distribution

Argentina

Diagnosis

Dorsal shield ovate. Cephalon semicircular; glabella smooth, slightly constricted at the palpebral lobes, slightly expanded anteriorly with rounded margin; occipital furrow expressed as a pair of slit-like lateral depressions widely separated medially; occipital ring undifferentiated. Fixigenae narrow in the palpebral area; eyes medium-sized, close to the glabella, slightly anterior in position. Librigenae wide with long stout genal spines. Thorax of 8 segments; axis subequal in width to pleurae; anterior pleural ends pointed, posterior pleural ends truncate. Pygidium semicircular; axis narrowing backward, with 9-10 rings; pleural furrows distinct, interpleural furrows faintly visible; border medium-wide.

Remarks

This species is the type species of the genus Niobides.