Edited by oilshale
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Orthograptus calcaratus
Images: 
By TqB (edited)
Taxonomy
Graptolite
Kingdom: Animalia
Phylum: Pterobranchia
Class: Graptolithina
Order: Graptoloidea
Family: Diplograptidae
Genus: Orthograptus
Species: Orthograptus calcaratus
Author Citation Elles and Wood
Geological Time Scale
Eon: Phanerozoic
Era: Paleozoic
Period: Ordovician
Sub Period: None
Epoch: Middle
International Age: Darriwilian (Llanvirn)
Stratigraphy
Caerhys Shale Formation
Biostratigraphy
Murchisoni Zone
Provenance
Collector: self
Date Collected: 08/05/1976
Acquired by: Field Collection
Dimensions
Length: 25 mm
Location
Abereiddi Bay
Pembrokeshire
Wales
United Kingdom
- abereiddi
- caerhys shale formation
- calcaratus
- diplograptus
- graptolite
- llanvirn
- murchisoni
- ordovician
- orthograptus
Comments
A common scandent, biserial form, frequently found alongside the zonal species Didymograptus murchisoni at this famous locality.
The individuals on this surface are current aligned.
Reference for ID: Elles & Wood 1901-1918, Monograph on British Graptolites, Pal. Soc. Monograph v.33.
(Plate XXX, fig 6)
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