Agnostida

Lotagnostus orientalis

Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Agnostidae

Ordovician, Early Ordovician TremadocianZhejiang, Xinjiang
Lotagnostus orientalis — photo 1
Photo 1 · Cephalon is the holotype (Zhejiang; Lu Reconstruction (Zhou Zhiyi Illustrated specimens (Xinjiang; Lin Tianrui et et al., 1984) 1987) al., 2001) Complete dorsal shield Complete (Zhejiang; Baishui) dorsal shield (Zhejiang; Huangmomao )
Lotagnostus orientalis — photo 2
Photo 2 · Cephalon is the holotype (Zhejiang; Lu Reconstruction (Zhou Zhiyi Illustrated specimens (Xinjiang; Lin Tianrui et et al., 1984) 1987) al., 2001) Complete dorsal shield Complete (Zhejiang; Baishui) dorsal shield (Zhejiang; Huangmomao )
Lotagnostus orientalis — photo 3
Photo 3 · Cephalon is the holotype (Zhejiang; Lu Reconstruction (Zhou Zhiyi Illustrated specimens (Xinjiang; Lin Tianrui et et al., 1984) 1987) al., 2001) Complete dorsal shield Complete (Zhejiang; Baishui) dorsal shield (Zhejiang; Huangmomao )
Lotagnostus orientalis — photo 4
Photo 4 · Cephalon is the holotype (Zhejiang; Lu Reconstruction (Zhou Zhiyi Illustrated specimens (Xinjiang; Lin Tianrui et et al., 1984) 1987) al., 2001) Complete dorsal shield Complete (Zhejiang; Baishui) dorsal shield (Zhejiang; Huangmomao )
Lotagnostus orientalis — photo 5
Photo 5 · Cephalon is the holotype (Zhejiang; Lu Reconstruction (Zhou Zhiyi Illustrated specimens (Xinjiang; Lin Tianrui et et al., 1984) 1987) al., 2001) Complete dorsal shield Complete (Zhejiang; Baishui) dorsal shield (Zhejiang; Huangmomao )
Lotagnostus orientalis — photo 6
Photo 6 · Cephalon is the holotype (Zhejiang; Lu Reconstruction (Zhou Zhiyi Illustrated specimens (Xinjiang; Lin Tianrui et et al., 1984) 1987) al., 2001) Complete dorsal shield Complete (Zhejiang; Baishui) dorsal shield (Zhejiang; Huangmomao )
Lotagnostus orientalis — photo 7
Photo 7 · Cephalon is the holotype (Zhejiang; Lu Reconstruction (Zhou Zhiyi Illustrated specimens (Xinjiang; Lin Tianrui et et al., 1984) 1987) al., 2001) Complete dorsal shield Complete (Zhejiang; Baishui) dorsal shield (Zhejiang; Huangmomao )
Classification
Order Agnostida / Suborder Agnostina / Superfamily Agnostoidea / Family Agnostidae
Genus
Lotagnostus Whitehouse, 1936
Genus author
Whitehouse F. W.
Genus etymology
lot, possibly derived from lotus (lotus flower)?; Agnostus, a trilobite genus name.
Species
L. orientalis (Lu & Lin, 1984)
Species author
Lu Yanhao, Lin Huanling
Species etymology
orientalis, Latin, eastern, referring to its Chinese origin.
Age
Ordovician, Early Ordovician Tremadocian
Distribution
Zhejiang, Xinjiang
Synonyms
Pseudoperonopsis orientalis
Diagnosis
Surface smooth. Cephalon semicircular-oval; glabella gently convex, subconical, anterior end rounded, frontal lobe slightly pentagonal, with a small node at the center of the glabellar posterior lobe; dorsal furrow shallow, but distinct; basal lobe relatively small, triangular; border narrow. Pygidium semicircular-oval; pygidial axis long, divided into three rings by two pairs of weak lateral furrows, anterior ring widest, second ring with axial node, terminal end of ring with a small node; dorsal furrow shallow and narrow; border narrow; border furrow relatively deep; no posterolateral spines.