Corynexochida

Duyunaspis duyunensi

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocarinae

Cambrian, Series 2, Stage 4Hunan, Guizhou
Duyunaspis duyunensi — photo 1
Photo 1 · Type specimen (Guizhou; Peng Reconstruction with nine thoracic segments and Reconstruction with ten thoracic Shanchi 2020) sexual dimorphism Lei et al.,2016 segments Dai et al.,2017 Complete dorsal shield Ontogenetic sequence Hunan; Dai et (Hunan; Baishui) al.,2017
Duyunaspis duyunensi — photo 2
Photo 2 · Type specimen (Guizhou; Peng Reconstruction with nine thoracic segments and Reconstruction with ten thoracic Shanchi 2020) sexual dimorphism Lei et al.,2016 segments Dai et al.,2017 Complete dorsal shield Ontogenetic sequence Hunan; Dai et (Hunan; Baishui) al.,2017
Duyunaspis duyunensi — photo 3
Photo 3 · Type specimen (Guizhou; Peng Reconstruction with nine thoracic segments and Reconstruction with ten thoracic Shanchi 2020) sexual dimorphism Lei et al.,2016 segments Dai et al.,2017 Complete dorsal shield Ontogenetic sequence Hunan; Dai et (Hunan; Baishui) al.,2017
Duyunaspis duyunensi — photo 4
Photo 4 · Type specimen (Guizhou; Peng Reconstruction with nine thoracic segments and Reconstruction with ten thoracic Shanchi 2020) sexual dimorphism Lei et al.,2016 segments Dai et al.,2017 Complete dorsal shield Ontogenetic sequence Hunan; Dai et (Hunan; Baishui) al.,2017
Duyunaspis duyunensi — photo 5
Photo 5 · Type specimen (Guizhou; Peng Reconstruction with nine thoracic segments and Reconstruction with ten thoracic Shanchi 2020) sexual dimorphism Lei et al.,2016 segments Dai et al.,2017 Complete dorsal shield Ontogenetic sequence Hunan; Dai et (Hunan; Baishui) al.,2017
Duyunaspis duyunensi — photo 6
Photo 6 · Type specimen (Guizhou; Peng Reconstruction with nine thoracic segments and Reconstruction with ten thoracic Shanchi 2020) sexual dimorphism Lei et al.,2016 segments Dai et al.,2017 Complete dorsal shield Ontogenetic sequence Hunan; Dai et (Hunan; Baishui) al.,2017
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. duyunensi Zhang & Qian in Zhou et al., 1977
Species author
Zhang Wentang, Qian Yiyuan
Species etymology
Duyun, place name, type specimenstype locality。
Age
Cambrian, Series 2, Stage 4
Distribution
Hunan, Guizhou
Synonyms
Duyunaspis guzhangensis; D. songtaoensis; D. laevigatus; D. briaris; D. obesis Duyunaspis
Diagnosis
Dorsal shield elongate-elliptical, micropygous. Glabella broad, elongate barrel-shaped, with four pairs of glabellar furrows; occipital furrow straight; fixed cheek narrow; palpebral lobe large, slightly inclined outward; outer border extremely narrow, border furrow deeply cut; Cutting; Anterior branch of facial suture short, S-shaped, posterior branch relatively long, extending relatively straight and obliquely to both sides. Adult thorax of 10 segments; Axis about as wide as pleural region, fusiform; Pleural furrow bisecting the pleural segments; Distal end of pleural segment short and pointed, triangular. Pygidium small, subsemicircular; Axis stout and short, rapidly narrowing backward, with three axial rings and a terminal lobe; Posterior border narrow, medially rounded or concave forward.
Remarks
This species is the type species of Duyunaspis.