Corynexochida

Duyunaspis paiwuensis

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocarinae

Cambrian, Series 2, Stage 4Hunan

Duyunaspis paiwuensis — photo 1 — Photo 1 · Type specimen (Hunan; Lei Qianping et Reconstruction with nine thoracic segments and With ten thoracic segments al., 2014) sexual dimorphism Lei et al.,2016 Hunan; Lei Qianping et al. 2014 Complete dorsal shield (Hunan; Yuzhao) Complete Figured specimen (Hunan; Lei dorsal shield Qianping et al., 2014) (Hunan; Baishui)

Duyunaspis paiwuensis — photo 2 — Photo 2 · Type specimen (Hunan; Lei Qianping et Reconstruction with nine thoracic segments and With ten thoracic segments al., 2014) sexual dimorphism Lei et al.,2016 Hunan; Lei Qianping et al. 2014 Complete dorsal shield (Hunan; Yuzhao) Complete Figured specimen (Hunan; Lei dorsal shield Qianping et al., 2014) (Hunan; Baishui)

Duyunaspis paiwuensis — photo 3 — Photo 3 · Type specimen (Hunan; Lei Qianping et Reconstruction with nine thoracic segments and With ten thoracic segments al., 2014) sexual dimorphism Lei et al.,2016 Hunan; Lei Qianping et al. 2014 Complete dorsal shield (Hunan; Yuzhao) Complete Figured specimen (Hunan; Lei dorsal shield Qianping et al., 2014) (Hunan; Baishui)

Duyunaspis paiwuensis — photo 4 — Photo 4 · Type specimen (Hunan; Lei Qianping et Reconstruction with nine thoracic segments and With ten thoracic segments al., 2014) sexual dimorphism Lei et al.,2016 Hunan; Lei Qianping et al. 2014 Complete dorsal shield (Hunan; Yuzhao) Complete Figured specimen (Hunan; Lei dorsal shield Qianping et al., 2014) (Hunan; Baishui)

Duyunaspis paiwuensis — photo 5 — Photo 5 · Type specimen (Hunan; Lei Qianping et Reconstruction with nine thoracic segments and With ten thoracic segments al., 2014) sexual dimorphism Lei et al.,2016 Hunan; Lei Qianping et al. 2014 Complete dorsal shield (Hunan; Yuzhao) Complete Figured specimen (Hunan; Lei dorsal shield Qianping et al., 2014) (Hunan; Baishui)

Duyunaspis paiwuensis — photo 6 — Photo 6 · Type specimen (Hunan; Lei Qianping et Reconstruction with nine thoracic segments and With ten thoracic segments al., 2014) sexual dimorphism Lei et al.,2016 Hunan; Lei Qianping et al. 2014 Complete dorsal shield (Hunan; Yuzhao) Complete Figured specimen (Hunan; Lei dorsal shield Qianping et al., 2014) (Hunan; Baishui)

Duyunaspis paiwuensis — photo 7 — Photo 7 · Type specimen (Hunan; Lei Qianping et Reconstruction with nine thoracic segments and With ten thoracic segments al., 2014) sexual dimorphism Lei et al.,2016 Hunan; Lei Qianping et al. 2014 Complete dorsal shield (Hunan; Yuzhao) Complete Figured specimen (Hunan; Lei dorsal shield Qianping et al., 2014) (Hunan; Baishui)

Duyunaspis paiwuensis — photo 8 — Photo 8 · Type specimen (Hunan; Lei Qianping et Reconstruction with nine thoracic segments and With ten thoracic segments al., 2014) sexual dimorphism Lei et al.,2016 Hunan; Lei Qianping et al. 2014 Complete dorsal shield (Hunan; Yuzhao) Complete Figured specimen (Hunan; Lei dorsal shield Qianping et al., 2014) (Hunan; Baishui)

Classification

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocarinae

Genus

Duyunaspis Zhang & Qian in Zhou et al., 1977

Genus author

Zhang Wentang, Qian Yiyuan

Genus etymology

duyun, place name, type speciestype locality;aspis, shield

Species

D. paiwuensis Lei & Peng, 2014

Species author

Lei Qianping, Peng Shanchi

Species etymology

Paiwu, Huayuan, Hunan, the type locality

Age

Cambrian, Series 2, Stage 4

Distribution

Hunan

Diagnosis

Small trilobite, dorsal shield elongate-oval. Cephalon transversely broad; Glabella cylindrical, sides subparallel, nearly three times as long as wide; With four pairs of deep pit-like glabellar furrows; Occipital furrow straight, shallow medially, Laterally abruptly deepening into pits; Fixed cheek broad; Palpebral lobe of moderate size; Eye ridge well developed, extending from tip of palpebral lobe forward to anterolateral corner of glabella; Proparian facial suture, anterior branch short, posterior branch relatively long; Posterior limb triangular; Free cheek narrow and small, lateral margin slender and convex. Adult with 10 thoracic segments, axis narrow; Pleural segments extending straight, pleural furrow deeply incised, distal end of pleural segment pointed. Pygidium small, axis Conical, with three axial rings and a terminal lobe; Pygidial border narrow, middle of posterior margin with a notch in some.