https://wserv3.esc.cam.ac.uk/p1acollections/items/browse?sort_field=added&page=15&sort_dir=a&output=atom <![CDATA[1A Collections]]> 2024-04-09T21:24:32+01:00 Omeka https://wserv3.esc.cam.ac.uk/p1acollections/items/show/145 <![CDATA[<h2><strong>TF0208<br /></strong></h2> <h2>Littorina muricata</h2>]]>

Species

Littorina muricata

Stratigraphic Range

Jurassic

Taxonomy

Phylum: Mollusca
Class: Gastropoda
Genus: Littorina

Distinctive Features

Coiled shell (helical)
Spire
Body whorl

Preservation

External mould and external casts
]]> 2019-07-04T09:52:50+01:00

Title

TF0208

Littorina muricata

Subject

Specimen Age

Jurassic

Location

Coralline Oolite, Upware, Cambridgeshire

Description

Species

Littorina muricata

Stratigraphic Range

Jurassic

Taxonomy

Phylum: Mollusca
Class: Gastropoda
Genus: Littorina

Distinctive Features

Coiled shell (helical)
Spire
Body whorl

Preservation

External mould and external casts
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/146 <![CDATA[<h2><strong>TF1001<br /></strong></h2> <h2>Dendroid graptolites</h2>]]>

Stratigraphic Range

Cambrian to Carboniferous

Taxonomy

Phylum: Hemichordata
Class: Graptolithina
Order: Dendroidea

Distinctive Features

Numerous branching stipes
Colonial
Thecae

Preservation

Flattened

Advanced notes

In this specimen we cannot see the size of a potential holdfast. Because of this we cannot say if this is a planktonic or benthic animal.

Dendroid graptolites began as benthic organisms attaching to the seafloor with a holdfast, but some diversified as planktonic animals, with a reduced holdfast.
]]> 2019-07-04T09:52:50+01:00

Title

TF1001

Dendroid graptolites

Description

Stratigraphic Range

Cambrian to Carboniferous

Taxonomy

Phylum: Hemichordata
Class: Graptolithina
Order: Dendroidea

Distinctive Features

Numerous branching stipes
Colonial
Thecae

Preservation

Flattened

Advanced notes

In this specimen we cannot see the size of a potential holdfast. Because of this we cannot say if this is a planktonic or benthic animal.

Dendroid graptolites began as benthic organisms attaching to the seafloor with a holdfast, but some diversified as planktonic animals, with a reduced holdfast.
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/148 <![CDATA[<h2><strong>TF1002<br /></strong></h2> <h2>Graptoloid graptolite</h2>]]>

Stratigraphic Range

Ordovician

Taxonomy

Phylum: Hemichordata
Class: Graptolithina
Order: Graptoloidea

Distinctive Features

Thecae
Stipes
Rhabdosome
Nema

Preservation

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

Advanced notes

The number of stipes decreased over time, from 4 to 3 to 2. This specimen has 3 stipes, placing it between four stiped animals such as Tetragraptus and two stiped animals such as Didymograptus in time.
]]> 2019-07-04T09:52:50+01:00

Title

TF1002

Graptoloid graptolite

Subject

Specimen Age

Ordovician

Location

Australia

Description

Stratigraphic Range

Ordovician

Taxonomy

Phylum: Hemichordata
Class: Graptolithina
Order: Graptoloidea

Distinctive Features

Thecae
Stipes
Rhabdosome
Nema

Preservation

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

Advanced notes

The number of stipes decreased over time, from 4 to 3 to 2. This specimen has 3 stipes, placing it between four stiped animals such as Tetragraptus and two stiped animals such as Didymograptus in time.
]]> https://wserv3.esc.cam.ac.uk/p1acollections/items/show/149 <![CDATA[<h2><strong>TF1003<br /></strong></h2> <h2>Didymograptus</h2>]]>

Stratigraphic Range

Ordovician

Taxonomy

Phylum: Hemichordata
Class: Graptolithina
Genus: Didymograptus

Distinctive Features

Stipes (2)
Thecae
Rhabdosome
Nema
'sawtooth'

Preservation

Flattened
Carbon film
Pale colourisation from chlorine inclusion into the fossil

Advanced notes

The 'sawtooth' faces are facing each other. This is therefore a relatively old two stiped graptolite from the Ordovician. One specimen shows two graptolites with nemas overlapping. At first glance this could be mistaken for a four stiped graptolite, such as Tetrapgraptus, but close examination reveals that there are two animals, squashed on top of each other.
]]> 2019-07-04T09:52:51+01:00

Title

TF1003

Didymograptus

Subject

Specimen Age

Ordovician

Location

Llandeilo, Abereiddy Bay, Wales

Description

Stratigraphic Range

Ordovician

Taxonomy

Phylum: Hemichordata
Class: Graptolithina
Genus: Didymograptus

Distinctive Features

Stipes (2)
Thecae
Rhabdosome
Nema
'sawtooth'

Preservation

Flattened
Carbon film
Pale colourisation from chlorine inclusion into the fossil

Advanced notes

The 'sawtooth' faces are facing each other. This is therefore a relatively old two stiped graptolite from the Ordovician. One specimen shows two graptolites with nemas overlapping. At first glance this could be mistaken for a four stiped graptolite, such as Tetrapgraptus, but close examination reveals that there are two animals, squashed on top of each other.
]]> 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.
]]> 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/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/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/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/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)
]]>