DARELLIA recticostata Ammonite Fossil – Upper Toarcian Jurassic, Ravenscar Yorkshire UK
£ 48.00
This listing offers a fine example of the rare ammonite DARELLIA recticostata,
collected from the Upper Toarcian Stage of the Jurassic Period at Ravenscar, North Yorkshire, UK. A visually striking and scientifically important fossil, this ammonite represents a classic species from the world-famous Yorkshire coastFossil Type & Species:
• Type: Ammonite (Extinct Marine Cephalopod)
• Species: Darellia recticostata
• Known for its distinctive straight ribbing pattern and slender formGeological Context:
• Era: Mesozoic
• Period: Jurassic
• Stage: Upper Toarcian (~182–174 million years ago)
• Formation: Likely Whitby Mudstone Formation or Ravenscar Group equivalent
• Depositional Environment: Low-energy offshore marine basin with fine silt and clay sedimentation; conditions ideal for preservation of complete ammonites and marine vertebratesMorphological Features:
• Narrow, planispiral shell with strong, straight ribs (recticostate ornamentation) running across the flanks
• Involute coiling and compressed whorl section with a relatively small umbilicus
• Shell surface typically smooth between ribs and often well-preserved in laminated shaleScientific Importance:
• Darellia recticostata is a diagnostic species within the Upper Toarcian and is used as a biostratigraphic marker in regional Jurassic zonation
• Its precise morphology helps define subtle faunal and ecological shifts during the Toarcian oceanic changes, including known anoxic events
• A key genus for understanding Toarcian ammonite evolution and paleobiogeographyLocality Information:
• Ravenscar, Yorkshire, UK – one of the richest fossil-producing regions along the Jurassic Coast of England. A designated SSSI (Site of Special Scientific Interest) and part of the North Yorkshire and Cleveland Heritage CoastAuthenticity & Display:All of our fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. This listing includes photographs of the exact specimen you will receive. Please refer to the image for full sizing – the scale cube = 1cm.This is a scientifically and visually outstanding ammonite fossil, ideal for collectors of British Jurassic ammonites, educators, or enthusiasts of classic Whitby/Toarcian material.Own a genuine piece of Yorkshire’s prehistoric seafloor – over 175 million years old!
collected from the Upper Toarcian Stage of the Jurassic Period at Ravenscar, North Yorkshire, UK. A visually striking and scientifically important fossil, this ammonite represents a classic species from the world-famous Yorkshire coastFossil Type & Species:
• Type: Ammonite (Extinct Marine Cephalopod)
• Species: Darellia recticostata
• Known for its distinctive straight ribbing pattern and slender formGeological Context:
• Era: Mesozoic
• Period: Jurassic
• Stage: Upper Toarcian (~182–174 million years ago)
• Formation: Likely Whitby Mudstone Formation or Ravenscar Group equivalent
• Depositional Environment: Low-energy offshore marine basin with fine silt and clay sedimentation; conditions ideal for preservation of complete ammonites and marine vertebratesMorphological Features:
• Narrow, planispiral shell with strong, straight ribs (recticostate ornamentation) running across the flanks
• Involute coiling and compressed whorl section with a relatively small umbilicus
• Shell surface typically smooth between ribs and often well-preserved in laminated shaleScientific Importance:
• Darellia recticostata is a diagnostic species within the Upper Toarcian and is used as a biostratigraphic marker in regional Jurassic zonation
• Its precise morphology helps define subtle faunal and ecological shifts during the Toarcian oceanic changes, including known anoxic events
• A key genus for understanding Toarcian ammonite evolution and paleobiogeographyLocality Information:
• Ravenscar, Yorkshire, UK – one of the richest fossil-producing regions along the Jurassic Coast of England. A designated SSSI (Site of Special Scientific Interest) and part of the North Yorkshire and Cleveland Heritage CoastAuthenticity & Display:All of our fossils are 100% Genuine Specimens and come with a Certificate of Authenticity. This listing includes photographs of the exact specimen you will receive. Please refer to the image for full sizing – the scale cube = 1cm.This is a scientifically and visually outstanding ammonite fossil, ideal for collectors of British Jurassic ammonites, educators, or enthusiasts of classic Whitby/Toarcian material.Own a genuine piece of Yorkshire’s prehistoric seafloor – over 175 million years old!
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