RARE Grammoceras doertense Fossil Ammonite | Upper Lias Toarcian Jurassic | Coaley Woods Cotswolds UK | Certified Authentic Specimen
£ 42.00
An exceptionally preserved and rare fossil ammonite: Grammoceras doertense from
the famous Cotswold Cephalopod Bed of the Upper Lias (Toarcian Stage, Jurassic Period), collected at Coaley Woods, Uley, Gloucestershire, United Kingdom. This is a fine-quality example of a slender, evolute ammonite from one of the UK's most fossiliferous Early Jurassic deposits.This listing includes the exact specimen shown in the photographs, with a 1cm scale cube provided for accurate size reference. Please refer to all images for measurements and condition. Geological & Palaeontological Information:
• Fossil Type: Ammonite
• Species: Grammoceras doertense (originally described by Fucini, later referenced in UK zonation work)
• Geological Period: Jurassic
• Stage: Toarcian (~183 to 174 million years ago)
• Stratigraphy: Upper Lias — Cotswold Cephalopod Bed
• Location: Coaley Woods, Uley, Gloucestershire, England, UK
• Depositional Environment: Offshore marine mudstone and silty shales with excellent fossil preservation potential
• Order: Ammonitida
• Superfamily: Hildoceratoidea
• Family: Hildoceratidae
• Biozone (Inferred): Possibly within the Bifrons Zone or Variabilis Subzone, typical for well-preserved Grammoceras species in the Toarcian Morphological Features:
• Extremely evolute shell with thin, compressed whorls
• Fine, regular ribbing radiating from the umbilicus to the outer edge
• Flat or gently rounded venter without strong keels
• Suture lines may be visible under close inspection or preparation
• Graceful and symmetrical coiling — characteristic of Grammoceras Notable Points:
• Grammoceras doertense is a highly sought-after ammonite species for Toarcian zone studies and biostratigraphy
• The Cotswold Cephalopod Bed is renowned for yielding superbly preserved cephalopods with crisp ornamentation and fine detail
• Rarely available in this condition and locality on the collector market Why This Fossil is an Excellent Addition:
• Scientific significance in Jurassic zonation and ammonite evolution
• Beautifully preserved example from a classic UK locality
• 100% genuine and ethically sourced
• Supplied with a Certificate of Authenticity for peace of mind
• Perfect for display, educational purposes, or serious fossil collections
the famous Cotswold Cephalopod Bed of the Upper Lias (Toarcian Stage, Jurassic Period), collected at Coaley Woods, Uley, Gloucestershire, United Kingdom. This is a fine-quality example of a slender, evolute ammonite from one of the UK's most fossiliferous Early Jurassic deposits.This listing includes the exact specimen shown in the photographs, with a 1cm scale cube provided for accurate size reference. Please refer to all images for measurements and condition. Geological & Palaeontological Information:
• Fossil Type: Ammonite
• Species: Grammoceras doertense (originally described by Fucini, later referenced in UK zonation work)
• Geological Period: Jurassic
• Stage: Toarcian (~183 to 174 million years ago)
• Stratigraphy: Upper Lias — Cotswold Cephalopod Bed
• Location: Coaley Woods, Uley, Gloucestershire, England, UK
• Depositional Environment: Offshore marine mudstone and silty shales with excellent fossil preservation potential
• Order: Ammonitida
• Superfamily: Hildoceratoidea
• Family: Hildoceratidae
• Biozone (Inferred): Possibly within the Bifrons Zone or Variabilis Subzone, typical for well-preserved Grammoceras species in the Toarcian Morphological Features:
• Extremely evolute shell with thin, compressed whorls
• Fine, regular ribbing radiating from the umbilicus to the outer edge
• Flat or gently rounded venter without strong keels
• Suture lines may be visible under close inspection or preparation
• Graceful and symmetrical coiling — characteristic of Grammoceras Notable Points:
• Grammoceras doertense is a highly sought-after ammonite species for Toarcian zone studies and biostratigraphy
• The Cotswold Cephalopod Bed is renowned for yielding superbly preserved cephalopods with crisp ornamentation and fine detail
• Rarely available in this condition and locality on the collector market Why This Fossil is an Excellent Addition:
• Scientific significance in Jurassic zonation and ammonite evolution
• Beautifully preserved example from a classic UK locality
• 100% genuine and ethically sourced
• Supplied with a Certificate of Authenticity for peace of mind
• Perfect for display, educational purposes, or serious fossil collections
