https://wserv3.esc.cam.ac.uk/p1acollections/items/browse?page=12&output=atom <![CDATA[1A Collections]]> 2024-04-09T21:22:57+01:00 Omeka https://wserv3.esc.cam.ac.uk/p1acollections/items/show/159 <![CDATA[<h2><strong>TF0613<br /></strong></h2> <h2>Cheirurus hydei</h2>]]>

Species

Cheirurus hydei

Stratigraphic Range

Ordovician to Devonian

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Phacopida
Family: Cheiruridae
Genus: Cheirurus

Distinctive Features

Pygidium
Thorax
Cephalon

Preservation

External mould (manmade cast)
]]> 2019-07-04T09:52:54+01:00

Title

TF0613

Cheirurus hydei

Description

Species

Cheirurus hydei

Stratigraphic Range

Ordovician to Devonian

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Phacopida
Family: Cheiruridae
Genus: Cheirurus

Distinctive Features

Pygidium
Thorax
Cephalon

Preservation

External mould (manmade cast)
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/158 <![CDATA[<h2><strong>TF0612<br /></strong></h2> <h2>Ogygiocarella debuchi</h2>]]>

Species

Ogygiocarella debuchi

Stratigraphic Range

Ordovician

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Asaphida
Genus: Ogygiocarella

Distinctive Features

Cephalon
Thorax
Pygidium

Preservation

External mould (manmade)
]]> 2019-07-04T09:52:54+01:00

Title

TF0612

Ogygiocarella debuchi

Description

Species

Ogygiocarella debuchi

Stratigraphic Range

Ordovician

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Asaphida
Genus: Ogygiocarella

Distinctive Features

Cephalon
Thorax
Pygidium

Preservation

External mould (manmade)
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/157 <![CDATA[<h2><strong>TF0611<br /></strong></h2> <h2>Trinucleid</h2>]]>

Stratigraphic Range

Ordovician to Silurian

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Asaphida
Family: Trinucleidae

Distinctive Features

Cephalon
Thorax
Pygidium
Large fringe at front of cephalon

Preservation

External mould (manmade)

Advanced notes

Trinucleids were fast moving low level epifaunal suspension feeders. The large fringe at the front of the cephalon may have been for food gathering, and their large cephalon size may have been an antipredatory adaptation. Some exceptionally preserved specimens have been found with sediment in the guts of the animals, perhaps supporting the suspension-feeding hypothesis.
]]> 2019-07-04T09:52:53+01:00

Title

TF0611

Trinucleid

Description

Stratigraphic Range

Ordovician to Silurian

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Asaphida
Family: Trinucleidae

Distinctive Features

Cephalon
Thorax
Pygidium
Large fringe at front of cephalon

Preservation

External mould (manmade)

Advanced notes

Trinucleids were fast moving low level epifaunal suspension feeders. The large fringe at the front of the cephalon may have been for food gathering, and their large cephalon size may have been an antipredatory adaptation. Some exceptionally preserved specimens have been found with sediment in the guts of the animals, perhaps supporting the suspension-feeding hypothesis.
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/156 <![CDATA[<h2><strong>TF0603<br /></strong></h2> <h2>Paradoxides bohemicus</h2>]]>

Species

Paradoxides bohemicus

Stratigraphic Range

Cambrian

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Redlichiida
Genus: Paradoxides

Distinctive Features

Cephalon
Thorax
Pygidium
Glabella

Preservation

External mould (manmade cast)
]]> 2019-07-04T09:52:53+01:00

Title

TF0603

Paradoxides bohemicus

Subject

Location

Jince Formation, Bohemia

Description

Species

Paradoxides bohemicus

Stratigraphic Range

Cambrian

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Redlichiida
Genus: Paradoxides

Distinctive Features

Cephalon
Thorax
Pygidium
Glabella

Preservation

External mould (manmade cast)
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/155 <![CDATA[<h2><strong>TF0602<br /></strong></h2> <h2>Ogygopsis</h2>]]>

Stratigraphic Range

Cambrian

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Corynexochida
Genus: Ogygopsis

Distinctive Features

Glabella
Eye ridges
Cephalon
Thorax
Pygidium

Preservation

External mould (manmade cast)
]]> 2019-07-04T09:52:53+01:00

Title

TF0602

Ogygopsis

Subject

Location

Mount Stephen, Brisith Columbia, Canada

Description

Stratigraphic Range

Cambrian

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Corynexochida
Genus: Ogygopsis

Distinctive Features

Glabella
Eye ridges
Cephalon
Thorax
Pygidium

Preservation

External mould (manmade cast)
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/154 <![CDATA[<h2><strong>TF0601<br /></strong></h2> <h2>Ellipsocephalus hoffi</h2>]]>

Species

Ellipsocephalus hoffi

Stratigraphic Range

Cambrian

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Ptychopariida
Genus: Ellipsocephalus

Distinctive Features

Cephalon
Thorax
Pygidium
No eyes

Preservation

Cast of a mould (manmade)
External moulds of trilobite hard parts

Advanced notes

Ellipsocephalus hoffi was a blind species of trilobite. It likely lived in deep, poorly lit, aphotic environments.
]]> 2019-07-04T09:52:53+01:00

Title

TF0601

Ellipsocephalus hoffi

Description

Species

Ellipsocephalus hoffi

Stratigraphic Range

Cambrian

Taxonomy

Phylum: Arthropoda
Class: Trilobita
Order: Ptychopariida
Genus: Ellipsocephalus

Distinctive Features

Cephalon
Thorax
Pygidium
No eyes

Preservation

Cast of a mould (manmade)
External moulds of trilobite hard parts

Advanced notes

Ellipsocephalus hoffi was a blind species of trilobite. It likely lived in deep, poorly lit, aphotic environments.
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/153 <![CDATA[<h2><strong>TF0512<br /></strong></h2> <h2>Straight nautiloid</h2>]]>

Stratigraphic Range

Cambrian to Permian

Taxonomy

Phylum: Mollusca
Class: Cephalopoda

Distinctive Features

Straight
Chambers
Septa

Preservation

Manmade internal cast

Advanced notes

Nautiloids originated in the Cambrian and radiated during the Ordovician. Straight nautiloids went extinct in the Permian, but planispirally coiled nautiloids, for example the nautilus, live in the sea today.
]]> 2019-07-04T09:52:52+01:00

Title

TF0512

Straight nautiloid

Description

Stratigraphic Range

Cambrian to Permian

Taxonomy

Phylum: Mollusca
Class: Cephalopoda

Distinctive Features

Straight
Chambers
Septa

Preservation

Manmade internal cast

Advanced notes

Nautiloids originated in the Cambrian and radiated during the Ordovician. Straight nautiloids went extinct in the Permian, but planispirally coiled nautiloids, for example the nautilus, live in the sea today.
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/152 <![CDATA[<h2><strong>TF1006<br /></strong></h2> <h2>Spiral monograptids</h2>]]>

Stratigraphic Range

Silurian to Devonian

Taxonomy

Phylum: Hemichordata
Class: Graptolithina

Distinctive Features

Spiral stipes
Rhabdosome
Thecae
'sawtooth'

Preservation

Flattened
Carbon film

Advanced notes

You can see various preservational geometries in these slabs.
]]> 2019-07-04T09:52:52+01:00

Title

TF1006

Spiral monograptids

Description

Stratigraphic Range

Silurian to Devonian

Taxonomy

Phylum: Hemichordata
Class: Graptolithina

Distinctive Features

Spiral stipes
Rhabdosome
Thecae
'sawtooth'

Preservation

Flattened
Carbon film

Advanced notes

You can see various preservational geometries in these slabs.
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/151 <![CDATA[<h2><strong>TF1005<br /></strong></h2> <h2>Graptoloid graptolites</h2>]]>

Stratigraphic Range

Ordovician

Taxonomy

Phylum: Hemichordata
Class: Graptolithina
Order: Graptoloidea

Distinctive Features

Stipes
Rhabdosome
Thecae
'sawtooth'

Preservation

Flattened
Red colour from iron in sediment seeping into fossil

Advanced notes

You can see a range of geometries on this specimen: scandent, horizontal and pendent.
]]> 2019-07-04T09:52:51+01:00

Title

TF1005

Graptoloid graptolites

Subject

Specimen Age

Ordovician

Location

Australia

Description

Stratigraphic Range

Ordovician

Taxonomy

Phylum: Hemichordata
Class: Graptolithina
Order: Graptoloidea

Distinctive Features

Stipes
Rhabdosome
Thecae
'sawtooth'

Preservation

Flattened
Red colour from iron in sediment seeping into fossil

Advanced notes

You can see a range of geometries on this specimen: scandent, horizontal and pendent.
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/150 <![CDATA[<h2><strong>TF1004<br /></strong></h2> <h2>Horizontal didymograptid</h2>]]>

Taxonomy

Phylum: Hemichordata
Class: Graptolithina

Distinctive Features

Stipes (2)
Nema
Horizontal
Thecae
Rhabdosome

Preservation

Compressed
Carbon film
Red colour from iron in sediment seeping into fossil

Advanced notes

The position of the nema tells us that there are two horizontal stipes and not one stipe. This allows identification as a Didymograptid and not as a Monograptid.
]]> 2019-07-04T09:52:51+01:00

Title

TF1004

Horizontal didymograptid

Subject

Specimen Age

Ordovician

Location

Australia

Description

Taxonomy

Phylum: Hemichordata
Class: Graptolithina

Distinctive Features

Stipes (2)
Nema
Horizontal
Thecae
Rhabdosome

Preservation

Compressed
Carbon film
Red colour from iron in sediment seeping into fossil

Advanced notes

The position of the nema tells us that there are two horizontal stipes and not one stipe. This allows identification as a Didymograptid and not as a Monograptid.
]]>