TF1006 - Spiral monograptids

TF1006_HS.png

TF1006 hand specimen. Note flattened, bedding-parallel preservation.

TF1006_sketch.png

TF1006 sketch. Note range of geometries.

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.
TF1006 - Spiral monograptids