Asaphida

Dichelepyge lata

Order Asaphida / Superfamily Asaphoidea / Family Ceratopygidae

Stage 10 (Furongian, Cambrian) to Tremadocian (Early Ordovician)Hunan

Dichelepyge lata — photo 1 — Photo 1 · F. Holotype WT34 (Hunan; Peng 2020) NIGP112532 (Hunan; Peng 2020) Restoration of the ontogeny (Peng Shanchi 1994) Complete dorsal Complete exoskeleton dorsal (Hunan; Guodong) exoskeleton, part and counterpart (Hunan; Y.W) Meraspid specimen (Hunan; Meraspid part and counterpart (Hunan; Complete dorsal exoskeleton Levi) (Hunan; Baishui) Yumu)

Dichelepyge lata — photo 2 — Photo 2 · F. Holotype WT34 (Hunan; Peng 2020) NIGP112532 (Hunan; Peng 2020) Restoration of the ontogeny (Peng Shanchi 1994) Complete dorsal Complete exoskeleton dorsal (Hunan; Guodong) exoskeleton, part and counterpart (Hunan; Y.W) Meraspid specimen (Hunan; Meraspid part and counterpart (Hunan; Complete dorsal exoskeleton Levi) (Hunan; Baishui) Yumu)

Dichelepyge lata — photo 3 — Photo 3 · F. Holotype WT34 (Hunan; Peng 2020) NIGP112532 (Hunan; Peng 2020) Restoration of the ontogeny (Peng Shanchi 1994) Complete dorsal Complete exoskeleton dorsal (Hunan; Guodong) exoskeleton, part and counterpart (Hunan; Y.W) Meraspid specimen (Hunan; Meraspid part and counterpart (Hunan; Complete dorsal exoskeleton Levi) (Hunan; Baishui) Yumu)

Dichelepyge lata — photo 4 — Photo 4 · F. Holotype WT34 (Hunan; Peng 2020) NIGP112532 (Hunan; Peng 2020) Restoration of the ontogeny (Peng Shanchi 1994) Complete dorsal Complete exoskeleton dorsal (Hunan; Guodong) exoskeleton, part and counterpart (Hunan; Y.W) Meraspid specimen (Hunan; Meraspid part and counterpart (Hunan; Complete dorsal exoskeleton Levi) (Hunan; Baishui) Yumu)

Dichelepyge lata — photo 5 — Photo 5 · F. Holotype WT34 (Hunan; Peng 2020) NIGP112532 (Hunan; Peng 2020) Restoration of the ontogeny (Peng Shanchi 1994) Complete dorsal Complete exoskeleton dorsal (Hunan; Guodong) exoskeleton, part and counterpart (Hunan; Y.W) Meraspid specimen (Hunan; Meraspid part and counterpart (Hunan; Complete dorsal exoskeleton Levi) (Hunan; Baishui) Yumu)

Dichelepyge lata — photo 6 — Photo 6 · F. Holotype WT34 (Hunan; Peng 2020) NIGP112532 (Hunan; Peng 2020) Restoration of the ontogeny (Peng Shanchi 1994) Complete dorsal Complete exoskeleton dorsal (Hunan; Guodong) exoskeleton, part and counterpart (Hunan; Y.W) Meraspid specimen (Hunan; Meraspid part and counterpart (Hunan; Complete dorsal exoskeleton Levi) (Hunan; Baishui) Yumu)

Dichelepyge lata — photo 7 — Photo 7 · F. Holotype WT34 (Hunan; Peng 2020) NIGP112532 (Hunan; Peng 2020) Restoration of the ontogeny (Peng Shanchi 1994) Complete dorsal Complete exoskeleton dorsal (Hunan; Guodong) exoskeleton, part and counterpart (Hunan; Y.W) Meraspid specimen (Hunan; Meraspid part and counterpart (Hunan; Complete dorsal exoskeleton Levi) (Hunan; Baishui) Yumu)

Dichelepyge lata — photo 8 — Photo 8 · F. Holotype WT34 (Hunan; Peng 2020) NIGP112532 (Hunan; Peng 2020) Restoration of the ontogeny (Peng Shanchi 1994) Complete dorsal Complete exoskeleton dorsal (Hunan; Guodong) exoskeleton, part and counterpart (Hunan; Y.W) Meraspid specimen (Hunan; Meraspid part and counterpart (Hunan; Complete dorsal exoskeleton Levi) (Hunan; Baishui) Yumu)

Dichelepyge lata — photo 9 — Photo 9 · F. Holotype WT34 (Hunan; Peng 2020) NIGP112532 (Hunan; Peng 2020) Restoration of the ontogeny (Peng Shanchi 1994) Complete dorsal Complete exoskeleton dorsal (Hunan; Guodong) exoskeleton, part and counterpart (Hunan; Y.W) Meraspid specimen (Hunan; Meraspid part and counterpart (Hunan; Complete dorsal exoskeleton Levi) (Hunan; Baishui) Yumu)

Dichelepyge lata — photo 10 — Photo 10 · F. Holotype WT34 (Hunan; Peng 2020) NIGP112532 (Hunan; Peng 2020) Restoration of the ontogeny (Peng Shanchi 1994) Complete dorsal Complete exoskeleton dorsal (Hunan; Guodong) exoskeleton, part and counterpart (Hunan; Y.W) Meraspid specimen (Hunan; Meraspid part and counterpart (Hunan; Complete dorsal exoskeleton Levi) (Hunan; Baishui) Yumu)

Classification

Order Asaphida / Superfamily Asaphoidea / Family Ceratopygidae

Genus

Dichelepyge Harrington & Leanza, 1952

Genus author

Harrington H. J. & Leanza A.

Genus etymology

di-, Greek, two, double; chel-, Greek, hoof, claw; pyg-, Greek, tail

Species

D. lata Peng, 1984

Species author

Peng Shanchi

Species etymology

lata, wide, broad

Age

Stage 10 (Furongian, Cambrian) to Tremadocian (Early Ordovician)

Distribution

Hunan

Diagnosis

Glabella subcylindrical with three pairs of glabellar furrows, S1 long and oblique; anterior border long; palpebral lobes small, close to the glabella; librigenae wide with genal spines decreasing with growth. Thorax of 6 segments; axis narrower than pleurae; pleural furrows wide and deep, pleural spines pointed claw-like. Pygidium subtriangular; axis short with a long postaxial ridge; first and second pleural rings extended into two pairs of spines, the first pair short and small, the second pair slender and long.