Phacopida

Neseuretus paronai

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Calymenidae

Darriwilian (Middle Ordovician)Shaanxi, Guizhou, Chongqing

Neseuretus paronai — photo 1 — Photo 1 · Holotype PU 12505 (Shaanxi; Turvey et al., 2007) (Shaanxi; upper: Lu Yanhao 1975; lower colour: Yang Qun 2017) NI16979 (Shaanxi; Turvey et al., 2007) (Chongqing; Wei Xin 2020)

Neseuretus paronai — photo 2 — Photo 2 · Holotype PU 12505 (Shaanxi; Turvey et al., 2007) (Shaanxi; upper: Lu Yanhao 1975; lower colour: Yang Qun 2017) NI16979 (Shaanxi; Turvey et al., 2007) (Chongqing; Wei Xin 2020)

Neseuretus paronai — photo 3 — Photo 3 · Holotype PU 12505 (Shaanxi; Turvey et al., 2007) (Shaanxi; upper: Lu Yanhao 1975; lower colour: Yang Qun 2017) NI16979 (Shaanxi; Turvey et al., 2007) (Chongqing; Wei Xin 2020)

Neseuretus paronai — photo 4 — Photo 4 · Holotype PU 12505 (Shaanxi; Turvey et al., 2007) (Shaanxi; upper: Lu Yanhao 1975; lower colour: Yang Qun 2017) NI16979 (Shaanxi; Turvey et al., 2007) (Chongqing; Wei Xin 2020)

Neseuretus paronai — photo 5 — Photo 5 · Holotype PU 12505 (Shaanxi; Turvey et al., 2007) (Shaanxi; upper: Lu Yanhao 1975; lower colour: Yang Qun 2017) NI16979 (Shaanxi; Turvey et al., 2007) (Chongqing; Wei Xin 2020)

Classification

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Calymenidae

Genus

Neseuretus Hicks, 1873

Genus author

Hicks H.

Genus etymology

nes-, Greek, island

Species

N. paronai (Pellizzari, 1913)

Species author

Pellizzari G.

Species etymology

Parona, a surname

Age

Darriwilian (Middle Ordovician)

Distribution

Shaanxi, Guizhou, Chongqing

Synonyms

Calymmene paronai; Colpocoryphe paronai; Neseuretus concavus; Neseuretus cf. shensiensis; Neseuretus concavus tenellus; Neseuretus expansus

Diagnosis

Dorsal shield with fine granules. Glabella convex, trapezoidal; three or four pairs of glabellar furrows, S1 deep and wide, curved backward, S3 and S4 extremely shallow and short; three pairs of glabellar lateral lobes strongly convex, L1 subtriangular; dorsal furrows wide and deep, forming a pair of circular pits at the anterolateral corners of the glabella; preglabellar area subtrapezoidal, strongly convex; anterior border upturned; fixigenae narrow in the palpebral area; eyes small; eye ridges prominent; librigenae medium-wide, without genal spines. Thorax of 13 segments; spherical nodes at the sides of each axial ring; pleural furrows deep, pleural spines absent. Pygidium small; border wide.