Phacopida

Prophalaron jonesi

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Calymenidae

Katian (Late Ordovician)Australia

Prophalaron jonesi — photo 1 — Photo 1 · field Holotype NMV P313664, left internal mould, right latex cast of the external mould (Australia; Holloway et al., 2020) Paratypes (Australia; Holloway et al., 2020)

Prophalaron jonesi — photo 2 — Photo 2 · field Holotype NMV P313664, left internal mould, right latex cast of the external mould (Australia; Holloway et al., 2020) Paratypes (Australia; Holloway et al., 2020)

Classification

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Calymenidae

Genus

Prophalaron Holloway, Smith & Thomas, 2020

Genus author

Holloway D. J., Smith P. M. & Thomas G.

Genus etymology

pro-, before, forward; Phalaron, an ancient Greek convex circular ornament, referring to the convex preglabellar

Species

Prophalaron jonesi Holloway, Smith & Thomas, 2020

Species author

Holloway D. J., Smith P. M. & Thomas G.

Species etymology

From Brian Jones

Age

Katian (Late Ordovician)

Distribution

Australia

Diagnosis

Dorsal shield with scattered small granules. Cephalon semicircular; glabella truncate-conical with 3 pairs of glabellar furrows; dorsal furrows deep; preglabellar field long and convex; palpebral lobes small, eye ridges long; librigenae small, triangular. Thorax of 13 segments, axis narrower than pleurae; pleural furrows deep, pleural spines absent. Pygidium lens- to rhomboid-shaped; axis with 10 rings plus a terminal piece; pleural region with 7-8 pleural furrows and 6-7 interpleural furrows.