Corynexochida

Palaeadotes hunanensis

Order Corynexochida / Suborder Leiostegiina / Superfamily Dameselloidea / Family Damesellidae / Subfamily Bergeronitinae

Guzhangian (Miaolingian, Cambrian)Hunan, Guizhou, Guangxi

Palaeadotes hunanensis — photo 1 — Photo 1 · Type specimen figures Restoration (Peng et al., 2004) Cephalon and pygidium figures (Hunan; (Hunan; Yang Jialu 1978) Peng 2020) Literature specimen figure (Hunan; Peng Literature specimen (Yunnan; Peng et 2020) al., 2023)

Palaeadotes hunanensis — photo 2 — Photo 2 · Type specimen figures Restoration (Peng et al., 2004) Cephalon and pygidium figures (Hunan; (Hunan; Yang Jialu 1978) Peng 2020) Literature specimen figure (Hunan; Peng Literature specimen (Yunnan; Peng et 2020) al., 2023)

Palaeadotes hunanensis — photo 3 — Photo 3 · Type specimen figures Restoration (Peng et al., 2004) Cephalon and pygidium figures (Hunan; (Hunan; Yang Jialu 1978) Peng 2020) Literature specimen figure (Hunan; Peng Literature specimen (Yunnan; Peng et 2020) al., 2023)

Palaeadotes hunanensis — photo 4 — Photo 4 · Type specimen figures Restoration (Peng et al., 2004) Cephalon and pygidium figures (Hunan; (Hunan; Yang Jialu 1978) Peng 2020) Literature specimen figure (Hunan; Peng Literature specimen (Yunnan; Peng et 2020) al., 2023)

Palaeadotes hunanensis — photo 5 — Photo 5 · Type specimen figures Restoration (Peng et al., 2004) Cephalon and pygidium figures (Hunan; (Hunan; Yang Jialu 1978) Peng 2020) Literature specimen figure (Hunan; Peng Literature specimen (Yunnan; Peng et 2020) al., 2023)

Palaeadotes hunanensis — photo 6 — Photo 6 · Type specimen figures Restoration (Peng et al., 2004) Cephalon and pygidium figures (Hunan; (Hunan; Yang Jialu 1978) Peng 2020) Literature specimen figure (Hunan; Peng Literature specimen (Yunnan; Peng et 2020) al., 2023)

Classification

Order Corynexochida / Suborder Leiostegiina / Superfamily Dameselloidea / Family Damesellidae / Subfamily Bergeronitinae

Genus

Palaeadotes Öpik, 1967

Genus author

Öpik A. A.

Genus etymology

Derived from the Greek name "Palaeades" published by Dalman in 1827 as a replacement term for "trilobite"

Species

P. hunanensis (Yang in Zhou et al., 1977)

Species author

Yang Jialu

Species etymology

Hunan, Hunan Province, type locality of the type specimens

Age

Guzhangian (Miaolingian, Cambrian)

Distribution

Hunan, Guizhou, Guangxi

Synonyms

Bergeronites hunanesis; B. wannanensis; B. (Palaeadotes) hunanensis; B. (P.) wulingensis P. changdeensis; Palaeadotes wulingensis; Bergeronites dissidens; Bergeronites major B. jiangsuensis; B. kunshanensis; B. yushanensis

Diagnosis

Cranidium transversely wide and cap-like; glabella subsquare, strongly convex, with three pairs of glabellar furrows; dorsal furrows narrow; occipital furrow straight; occipital ring enlarged medially with a small occipital node; anterior border very narrow, preglabellar field absent; palpebral lobes decreasing in size with growth; eye ridges faint; fixigenae narrow in the palpebral area, posterior border furrows wide and shallow; librigenae wide with long genal spines. Thorax of 12 segments, axis tapering; pleurae wider than the axis, pleural furrows deep; pleural spines rather long, those of segments 3 and 7 being macropleural. Pygidium semicircular apart from pleural spines; anterior margin straight; axis convex, divided into four axial rings and a long triangular terminal piece that narrows rapidly; pleural lobes wide with deep pleural furrows; a pygidial spine arising from each pleural ring, the anterior ones large and stout, followed by six pairs of triangular spines, and the last pair small.