Furongian Epoch
Palaeozoic:
Cambrian Period
Paiban Age

The Paiban

The Paiban Age of the Furongian Epoch: 501 to 496 million years ago

Cambrian
   Terreneuvian
   Cambrian Epoch 2
   Middle Cambrian   
      Amgan
      Guzhangian  
   Furongian
      Paiban   
      Cambrian Stage IX 
       Dolgellian
Ordovician
   Early Ordovician 

Introduction
Ecosystems
Furongian Life
Links

Also known as the Maentwrogian, Dresbachian and the Ffestiniogian, the Paiban is a stage of the Furongian, underlain by the Guzhangian and overlain by an unnamed Stage IX and the Dolgellian, and dated at 501 to about 496 million years ago.

Representative Species

Hypseloconus elongatus

Drawing from Moore, Lalicker and Fischer, Invertebrate Fossils, McGraw-Hill Book Company Inc, 1952, p.291

Hypseloconus elongatus Berkey


Phylum : Mollusca
Class: Tergomya
Order: Hypseloconoidea
Family: Hypseloconidae

shell about 2.5 to 4 cm tall

Dresbachian

Wisconsin USA

the Hypseloconoidea, represented by species like Hypseloconus elongatus and Knightoconus antarcticusse, with cap-shaped shells (which in the case of Knightoconus also possessed septa), are often thought to be ancestral to the Cephalopoda, although the evidence for this is still debated


Agnostus pisiformis

Drawing © Inga B. Agnér

Agnostus pisiformis


Phylum : Arthropoda
Class: ???Trilobita
Order: Agnostida
Suborder: Agnostina
Family: Agnostidae

body about 5 mm long

Early Paiban Age - Agnostus pisiformis zone

Sweden

Agnostid trilobites had only two thoracic segments. These tiny trilobites were planktonic drifters. Following the discovery of a Furongian form from the Orsten Lagerst├Ątten with a limb preserved, it is believed now that these animals were not true trilobites at all, but more closely related to Crustacea


Tricrepicephalus

Drawing from Moore, Lalicker and Fischer, Invertebrate Fossils, McGraw-Hill Book Company Inc, 1952, p.503

Tricrepicephalus cedarensis Resser


Phylum : Arthropoda
Class: Trilobita
Order: Ptychopariida
Suborder: Ptychopariina
Superfamily: Crepicephalacea
Family: Tricrepicephalidae

body about 4.5 cm wide

Nolichucky Shale (Early Paiban Age - Agnostus pisiformis (European) zone / Cedaria and Crepicephalus (North American) Zones

Alabama, USA


Olenus gibbosus

Drawing from Moore, Lalicker and Fischer, Invertebrate Fossils, McGraw-Hill Book Company Inc, 1952, p.503

Olenus gibbosus Wahlenberg


Phylum : Arthropoda
Class: Trilobita
Order: Ptychopariida
Suborder: Ptychopariina
Superfamily: Olenacea
Family: Olenidae
Subfamily: Oleninae

body about 1.5 to 2 cm long

Olenus zone (Late Paiban Age)

Sweden


Elvinia roemeri

Drawing from Moore, Lalicker and Fischer, Invertebrate Fossils, McGraw-Hill Book Company Inc, 1952, p.500

Elvinia roemeri (Shumard)


Phylum : Arthropoda
Class: Trilobita
Order: Ptychopariida
Suborder: Ptychopariina
Superfamily: Komaspidacea
Family: Elviniidae

body about 1.5 to 2 cm long

Wilberns Formation , Elvinia (North American) Zone Olenus/Agnostus obesus zone (Late Paiban Age)

Texas

cranidium and pygidium "tail"


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page uploaded 15 May 2002, last modified 27 October
last modified ATW040521
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