Phacopida

Neseuretinus birmanicus

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Calymenidae

Katian (Late Ordovician) to Darriwilian (Middle Ordovician)Yunnan; Myanmar

Neseuretinus birmanicus — photo 1 — Photo 1 · Lectotype GSI 8341 (Myanmar; Turvey 2005) (Yunnan; Fortey et al., 2022) (Yunnan; Zhang et al., 2014) (Yunnan; Zitian) (Yunnan; panda) (Yunnan; Baishui)

Neseuretinus birmanicus — photo 2 — Photo 2 · Lectotype GSI 8341 (Myanmar; Turvey 2005) (Yunnan; Fortey et al., 2022) (Yunnan; Zhang et al., 2014) (Yunnan; Zitian) (Yunnan; panda) (Yunnan; Baishui)

Neseuretinus birmanicus — photo 3 — Photo 3 · Lectotype GSI 8341 (Myanmar; Turvey 2005) (Yunnan; Fortey et al., 2022) (Yunnan; Zhang et al., 2014) (Yunnan; Zitian) (Yunnan; panda) (Yunnan; Baishui)

Neseuretinus birmanicus — photo 4 — Photo 4 · Lectotype GSI 8341 (Myanmar; Turvey 2005) (Yunnan; Fortey et al., 2022) (Yunnan; Zhang et al., 2014) (Yunnan; Zitian) (Yunnan; panda) (Yunnan; Baishui)

Neseuretinus birmanicus — photo 5 — Photo 5 · Lectotype GSI 8341 (Myanmar; Turvey 2005) (Yunnan; Fortey et al., 2022) (Yunnan; Zhang et al., 2014) (Yunnan; Zitian) (Yunnan; panda) (Yunnan; Baishui)

Neseuretinus birmanicus — photo 6 — Photo 6 · Lectotype GSI 8341 (Myanmar; Turvey 2005) (Yunnan; Fortey et al., 2022) (Yunnan; Zhang et al., 2014) (Yunnan; Zitian) (Yunnan; panda) (Yunnan; Baishui)

Classification

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Calymenidae

Genus

Neseuretinus Dean, 1967

Genus author

Dean W. T.

Genus etymology

Neseuret-, Neseuretus, a trilobite genus name; -inus, belonging to, resembling, having

Species

N. birmanicus (Reed, 1906)

Species author

Reed F. R. C.

Species etymology

Birmania, Myanmar (Burma)

Age

Katian (Late Ordovician) to Darriwilian (Middle Ordovician)

Distribution

Yunnan; Myanmar

Synonyms

Calymene birmanica; 'Synhomalonotus' birmanicus; Diacalymene birmanica; Neseuretus birmanicus; Neseuretus ghavideli; Neseuretus (Neseuretinus) turcicus; Neseuretinus turcicus

Diagnosis

Dorsal shield with fine granules. Glabella convex, truncate-conical, three pairs of glabellar furrows, S1 deep and wide, curved backward; three pairs of glabellar lateral lobes strongly convex; dorsal furrows wide and deep; preglabellar area strongly convex; anterior border upturned; fixigenae narrow in the palpebral area; palpebral lobes small and elevated; eye ridges prominent; librigenae wide with short genal spines. Thorax of 13 segments; nodes prominent at the sides of the axis; pleural furrows deep, pleural spines absent. Pygidium small, subtriangular; pleural and interpleural furrows of the pygidial pleural region distinct; border wide.

Remarks

This species is the type species of the genus Neseuretinus.