Corynexochida

Dorypyge richthofeni

Order Corynexochida / Suborder Corynexochina / Family Dorypygidae

Cambrian, Miaolingian, DrumianLiaoning, Shandong, Hunan, North China

Dorypyge richthofeni — photo 1 — Photo 1 · Cranidium as holotype (Liaoning; Kobayashi Figured specimen (Shandong; Yuan Jinliang 1937) et al., 2012) Figured specimen (Hunan; Peng et al., 2004) Nearly complete dorsal shield (Liaoning; Nearly complete dorsal shield Guo Hongjun et al. 1996) (Shandong; Baishui)

Dorypyge richthofeni — photo 2 — Photo 2 · Cranidium as holotype (Liaoning; Kobayashi Figured specimen (Shandong; Yuan Jinliang 1937) et al., 2012) Figured specimen (Hunan; Peng et al., 2004) Nearly complete dorsal shield (Liaoning; Nearly complete dorsal shield Guo Hongjun et al. 1996) (Shandong; Baishui)

Dorypyge richthofeni — photo 3 — Photo 3 · Cranidium as holotype (Liaoning; Kobayashi Figured specimen (Shandong; Yuan Jinliang 1937) et al., 2012) Figured specimen (Hunan; Peng et al., 2004) Nearly complete dorsal shield (Liaoning; Nearly complete dorsal shield Guo Hongjun et al. 1996) (Shandong; Baishui)

Dorypyge richthofeni — photo 4 — Photo 4 · Cranidium as holotype (Liaoning; Kobayashi Figured specimen (Shandong; Yuan Jinliang 1937) et al., 2012) Figured specimen (Hunan; Peng et al., 2004) Nearly complete dorsal shield (Liaoning; Nearly complete dorsal shield Guo Hongjun et al. 1996) (Shandong; Baishui)

Dorypyge richthofeni — photo 5 — Photo 5 · Cranidium as holotype (Liaoning; Kobayashi Figured specimen (Shandong; Yuan Jinliang 1937) et al., 2012) Figured specimen (Hunan; Peng et al., 2004) Nearly complete dorsal shield (Liaoning; Nearly complete dorsal shield Guo Hongjun et al. 1996) (Shandong; Baishui)

Classification

Order Corynexochida / Suborder Corynexochina / Family Dorypygidae

Genus

Dorypyge Dames, 1883

Genus author

Dames W.

Genus etymology

dory-, Greek, spear; pyg-, Greek, tail

Species

D. richthofeni Dames, 1883

Species author

Dames, 1883

Species etymology

Ferdinand von Richthofen, German geographer and geologist, one of the pioneers of modern Chinese geoscience

Age

Cambrian, Miaolingian, Drumian

Distribution

Liaoning, Shandong, Hunan, North China

Synonyms

Dorypyge chihliensis; D. lata; D. lorenzi; D. qinlingensis; D. shantungensis; D. yuhangensis; D. zhaogeichuangensis; Dorypyge richthofeni chihliensis; Dorypyge richthofeni damesi variety

Diagnosis

Cephalon semicircular, densely tuberculate; glabella strongly convex, broadly rounded anteriorly; three pairs of extremely shallow glabellar furrows; occipital ring extended into an occipital spine directed upward and backward; fixed cheek narrow and raised; palpebral lobe of moderate size; Genal spines of free cheek relatively long. Thorax of 7 segments, each with axial spine; Axis slightly narrower than pleural region; Pleural furrow broad and deep, pleural spines short and pointed. Pygidium semicircular, nodes sparse; Pygidial axis of four rings plus a terminal Rings; Pleural ridges distinct; With six pairs of marginal spines slightly upturned backward and upward, 5th pair longest.

Remarks

This species is the type species of Dorypyge.