Redlichiida

Peachella brevispina

Order Redlichiida / Suborder Olenellina / Superfamily Olenelloidea / Family Olenellidae

Cambrian, Series 2, Stage 4USA

Peachella brevispina — photo 1 — Photo 1 · Holotype USNM 177236 (USA; Webster 2009) Complete dorsal shield (USA; Guodong) Illustrated specimens (USA; Webster 2009)

Peachella brevispina — photo 2 — Photo 2 · Holotype USNM 177236 (USA; Webster 2009) Complete dorsal shield (USA; Guodong) Illustrated specimens (USA; Webster 2009)

Peachella brevispina — photo 3 — Photo 3 · Holotype USNM 177236 (USA; Webster 2009) Complete dorsal shield (USA; Guodong) Illustrated specimens (USA; Webster 2009)

Classification

Order Redlichiida / Suborder Olenellina / Superfamily Olenelloidea / Family Olenellidae

Genus

Peachella Walcott, 1910

Genus author

Walcott C. D.

Genus etymology

Peach, honouring Peach B. N.

Species

P. brevispina Palmer in Palmer & Halley, 1979

Species author

Palmer A. R.

Species etymology

brevi-, Latin, short; spina, Latin, spine.

Age

Cambrian, Series 2, Stage 4

Distribution

USA

Diagnosis

Cephalon semicircular; glabella cylindrical, slightly constricted medially, with three pairs of glabellar furrows; genal spines broad; palpebral lobe connected to the glabella anteriorly, separated posteriorly. Thorax with prothorax of 14 segments and at least 9 segments of the opisthothorax; prothoracic segments with weak axial nodes, 3rd segment macropleural, pleural spine stout; 15th segment with long axial spine. Pygidium very small.

Remarks

Compared with the type species Peachella iddingsi, the main differences are the smaller genal spines and the stouter, shorter macropleural spines.