Agnostida

Aspidagnostus lunulosus

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Clavagnostidae

Cambrian, Miaolingian Guzhangian to Furongian PaibianHunan, Zhejiang; Kazakhstan, Siberia
Aspidagnostus lunulosus — photo 1
Photo 1 · Cephalon holotype (Kazakhstan; Naimark et al., 2017) (Siberia; Pegel 2000) Illustrated specimens (Hunan; Peng Shanchi 2020) (Zhejiang; Peng Shanchi Complete dorsal shield Complete dorsal shield 2020) (Zhejiang; Guodong) (Zhejiang; Baishui)
Aspidagnostus lunulosus — photo 2
Photo 2 · Cephalon holotype (Kazakhstan; Naimark et al., 2017) (Siberia; Pegel 2000) Illustrated specimens (Hunan; Peng Shanchi 2020) (Zhejiang; Peng Shanchi Complete dorsal shield Complete dorsal shield 2020) (Zhejiang; Guodong) (Zhejiang; Baishui)
Aspidagnostus lunulosus — photo 3
Photo 3 · Cephalon holotype (Kazakhstan; Naimark et al., 2017) (Siberia; Pegel 2000) Illustrated specimens (Hunan; Peng Shanchi 2020) (Zhejiang; Peng Shanchi Complete dorsal shield Complete dorsal shield 2020) (Zhejiang; Guodong) (Zhejiang; Baishui)
Aspidagnostus lunulosus — photo 4
Photo 4 · Cephalon holotype (Kazakhstan; Naimark et al., 2017) (Siberia; Pegel 2000) Illustrated specimens (Hunan; Peng Shanchi 2020) (Zhejiang; Peng Shanchi Complete dorsal shield Complete dorsal shield 2020) (Zhejiang; Guodong) (Zhejiang; Baishui)
Aspidagnostus lunulosus — photo 5
Photo 5 · Cephalon holotype (Kazakhstan; Naimark et al., 2017) (Siberia; Pegel 2000) Illustrated specimens (Hunan; Peng Shanchi 2020) (Zhejiang; Peng Shanchi Complete dorsal shield Complete dorsal shield 2020) (Zhejiang; Guodong) (Zhejiang; Baishui)
Aspidagnostus lunulosus — photo 6
Photo 6 · Cephalon holotype (Kazakhstan; Naimark et al., 2017) (Siberia; Pegel 2000) Illustrated specimens (Hunan; Peng Shanchi 2020) (Zhejiang; Peng Shanchi Complete dorsal shield Complete dorsal shield 2020) (Zhejiang; Guodong) (Zhejiang; Baishui)
Classification
Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Clavagnostidae
Genus
Aspidagnostus Whitehouse, 1936
Genus author
Whitehouse F. W.
Genus etymology
aspi-, Greek, shield, armour; Agnostus, a trilobite genus name.
Species
A. lunulosus (Kryskov in Borovikov & Kryskov, 1963)
Species author
Kryskov L. N.
Species etymology
possibly derived from lunulatris (crescentic).
Age
Cambrian, Miaolingian Guzhangian to Furongian Paibian
Distribution
Hunan, Zhejiang; Kazakhstan, Siberia
Synonyms
Clavagnostus?lunulosus; Aspidagnostus chekiangensis; A. cf. stictus
Diagnosis
Compared with Aspidagnostus laevis, the glabella is generally more elongate and slender; the inner lobes of the cephalon and pygidium have discontinuous furrows or pitted ornament; F1 and F2 of the pygidial axis are more distinct.
Remarks
Typical body length about 0.2-0.6 cm.