Corynexochida

Changaspis elongata

Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocephalinae

Cambrian, Series 2, Stage 4Hunan, Guizhou; Greenland
Changaspis elongata — photo 1
Photo 1 · 17 Thoracic segment specimens Guizhou; Du Type specimen (Hunan; Complete dorsal shield (Hunan; Guangying et al. 2019 Egorova et al., 1963) Jixian Laodeng) Pathological specimen Hunan; Yisuo Complete dorsal shield Figured specimen (Guizhou; Qin Qin et Yanyu (Hunan; Wuxing) al., 2010) Complete dorsal shield (Hunan; Complete dorsal shield (Hunan; Complete dorsal shield Complete dorsal shield (Hunan; Qianli zhi Jiang) Chengbei Baigong) (Hunan; Baishui) Pengcheng Jianke)
Changaspis elongata — photo 2
Photo 2 · 17 Thoracic segment specimens Guizhou; Du Type specimen (Hunan; Complete dorsal shield (Hunan; Guangying et al. 2019 Egorova et al., 1963) Jixian Laodeng) Pathological specimen Hunan; Yisuo Complete dorsal shield Figured specimen (Guizhou; Qin Qin et Yanyu (Hunan; Wuxing) al., 2010) Complete dorsal shield (Hunan; Complete dorsal shield (Hunan; Complete dorsal shield Complete dorsal shield (Hunan; Qianli zhi Jiang) Chengbei Baigong) (Hunan; Baishui) Pengcheng Jianke)
Changaspis elongata — photo 3
Photo 3 · 17 Thoracic segment specimens Guizhou; Du Type specimen (Hunan; Complete dorsal shield (Hunan; Guangying et al. 2019 Egorova et al., 1963) Jixian Laodeng) Pathological specimen Hunan; Yisuo Complete dorsal shield Figured specimen (Guizhou; Qin Qin et Yanyu (Hunan; Wuxing) al., 2010) Complete dorsal shield (Hunan; Complete dorsal shield (Hunan; Complete dorsal shield Complete dorsal shield (Hunan; Qianli zhi Jiang) Chengbei Baigong) (Hunan; Baishui) Pengcheng Jianke)
Changaspis elongata — photo 4
Photo 4 · 17 Thoracic segment specimens Guizhou; Du Type specimen (Hunan; Complete dorsal shield (Hunan; Guangying et al. 2019 Egorova et al., 1963) Jixian Laodeng) Pathological specimen Hunan; Yisuo Complete dorsal shield Figured specimen (Guizhou; Qin Qin et Yanyu (Hunan; Wuxing) al., 2010) Complete dorsal shield (Hunan; Complete dorsal shield (Hunan; Complete dorsal shield Complete dorsal shield (Hunan; Qianli zhi Jiang) Chengbei Baigong) (Hunan; Baishui) Pengcheng Jianke)
Changaspis elongata — photo 5
Photo 5 · 17 Thoracic segment specimens Guizhou; Du Type specimen (Hunan; Complete dorsal shield (Hunan; Guangying et al. 2019 Egorova et al., 1963) Jixian Laodeng) Pathological specimen Hunan; Yisuo Complete dorsal shield Figured specimen (Guizhou; Qin Qin et Yanyu (Hunan; Wuxing) al., 2010) Complete dorsal shield (Hunan; Complete dorsal shield (Hunan; Complete dorsal shield Complete dorsal shield (Hunan; Qianli zhi Jiang) Chengbei Baigong) (Hunan; Baishui) Pengcheng Jianke)
Changaspis elongata — photo 6
Photo 6 · 17 Thoracic segment specimens Guizhou; Du Type specimen (Hunan; Complete dorsal shield (Hunan; Guangying et al. 2019 Egorova et al., 1963) Jixian Laodeng) Pathological specimen Hunan; Yisuo Complete dorsal shield Figured specimen (Guizhou; Qin Qin et Yanyu (Hunan; Wuxing) al., 2010) Complete dorsal shield (Hunan; Complete dorsal shield (Hunan; Complete dorsal shield Complete dorsal shield (Hunan; Qianli zhi Jiang) Chengbei Baigong) (Hunan; Baishui) Pengcheng Jianke)
Changaspis elongata — photo 7
Photo 7 · 17 Thoracic segment specimens Guizhou; Du Type specimen (Hunan; Complete dorsal shield (Hunan; Guangying et al. 2019 Egorova et al., 1963) Jixian Laodeng) Pathological specimen Hunan; Yisuo Complete dorsal shield Figured specimen (Guizhou; Qin Qin et Yanyu (Hunan; Wuxing) al., 2010) Complete dorsal shield (Hunan; Complete dorsal shield (Hunan; Complete dorsal shield Complete dorsal shield (Hunan; Qianli zhi Jiang) Chengbei Baigong) (Hunan; Baishui) Pengcheng Jianke)
Changaspis elongata — photo 8
Photo 8 · 17 Thoracic segment specimens Guizhou; Du Type specimen (Hunan; Complete dorsal shield (Hunan; Guangying et al. 2019 Egorova et al., 1963) Jixian Laodeng) Pathological specimen Hunan; Yisuo Complete dorsal shield Figured specimen (Guizhou; Qin Qin et Yanyu (Hunan; Wuxing) al., 2010) Complete dorsal shield (Hunan; Complete dorsal shield (Hunan; Complete dorsal shield Complete dorsal shield (Hunan; Qianli zhi Jiang) Chengbei Baigong) (Hunan; Baishui) Pengcheng Jianke)
Changaspis elongata — photo 9
Photo 9 · 17 Thoracic segment specimens Guizhou; Du Type specimen (Hunan; Complete dorsal shield (Hunan; Guangying et al. 2019 Egorova et al., 1963) Jixian Laodeng) Pathological specimen Hunan; Yisuo Complete dorsal shield Figured specimen (Guizhou; Qin Qin et Yanyu (Hunan; Wuxing) al., 2010) Complete dorsal shield (Hunan; Complete dorsal shield (Hunan; Complete dorsal shield Complete dorsal shield (Hunan; Qianli zhi Jiang) Chengbei Baigong) (Hunan; Baishui) Pengcheng Jianke)
Changaspis elongata — photo 10
Photo 10 · 17 Thoracic segment specimens Guizhou; Du Type specimen (Hunan; Complete dorsal shield (Hunan; Guangying et al. 2019 Egorova et al., 1963) Jixian Laodeng) Pathological specimen Hunan; Yisuo Complete dorsal shield Figured specimen (Guizhou; Qin Qin et Yanyu (Hunan; Wuxing) al., 2010) Complete dorsal shield (Hunan; Complete dorsal shield (Hunan; Complete dorsal shield Complete dorsal shield (Hunan; Qianli zhi Jiang) Chengbei Baigong) (Hunan; Baishui) Pengcheng Jianke)
Classification
Order Corynexochida / Suborder Corynexochina / Family Oryctocephalidae / Family Oryctocephalinae
Genus
Changaspis Lee in Chien, 1961
Genus author
Li Shangi
Genus etymology
chang, a surname, Zhang, of unspecified reference; aspis, Greek, shield
Species
C. elongata Lee in Chien, 1961
Species author
Li Shangi
Species etymology
elongata
Age
Cambrian, Series 2, Stage 4
Distribution
Hunan, Guizhou; Greenland
Synonyms
Changaspis micropyge; Paraoryctcephalops plana; Pseudolancastria longispina; Changaspis? transversa; Changaspis longispina; Changaspis nangaoensis; Changaspis placenta Lancastria plana; Changaspis taihuensis
Diagnosis
Dorsal shield oval. Cephalon semicircular; glabella large, slightly expanding forward, rounded anteriorly, reaching the border furrow; four pairs of pit-like glabellar furrows, the posterior two pairs faint, the first pair slightly deeper and curved slightly backward; occipital furrow shallow and broad; fixed cheek flat; outer border broad and flat; palpebral lobe small; anterior facial suture branches subparallel, posterior branches directed outward and backward to the posterior margin; free cheek narrow, genal field broad and flat, extended backward into a genal spine. Thorax of 17 segments; axis tapering backward; pleural ribs nearly straight, their outer ends curving backward into flat pleural spines. Pygidium small, terminal end extended into a slender backward-projecting spine.