Name: Bathynotus
keuichousensis
Class
Trilobita; Trilobite
Order Redlichiida; Family Chenkouaspidae
Geological
Time: Early Middle Cambrian
Size: 25
mm long
Fossil
Site: Kaili Formation, Maiobanpo Section, Taijiang County, Kaili,
Guizhou Province, China
 This
trilobite is Bathynotus keuichousensis, the patronymic genus of
the trilobite family Bathynotidae, a family whose ordinal status
was in dispute. The members of the genus have recently been assigned
to the family Chengkouaspidae, a family within the Redlichiida.
Trilobites from this timeframe were members of the Redlichiida,
Ptychopariida, Corynexochida, and the Agnostida, with the balance
of the orders appearing later in time.
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