RARE 5.5″ Reineckia anceps Fossil Ammonite | Middle Callovian Jurassic | La Grimaudière Vienne France | Genuine with COA

Description

RARE: Reineckia anceps Fossil Ammonite (5.5″)

Geological Age: Middle Callovian, Middle Jurassic (~165 to 164 million years ago)

Location Found: La Grimaudière, Vienne, Nouvelle-Aquitaine, France

Fossil Type: Ammonite (Extinct Marine Cephalopod)

Species: Reineckia anceps

Order: Ammonitida

Superfamily: Stephanoceratoidea

Family: Reineckeiidae

Specimen Overview:

This rare 5.5-inch ammonite fossil is Reineckia anceps, an elegant and scientifically important species from the Middle Callovian stage of the Jurassic. Discovered in La Grimaudière, a well-known fossil site in Vienne, France, this specimen is a fine example of the marine life that thrived in Europe’s Jurassic seas.

The photo displays the actual fossil you will receive. A 1cm scale rule cube is included in the image for accurate sizing. Please refer to the photo for full size, preservation, and detail.

Geological Context & Depositional Environment:

The Middle Callovian was characterised by extensive shallow marine basins across Western Europe. The region around La Grimaudière represents one such basin, where calcareous clays and silts created a favourable environment for the preservation of marine organisms.

This fossil may come from within the Reineckia anceps Biozone, which is a key ammonite biostratigraphic marker for the Middle Callovian, particularly in Western Europe. These strata help correlate marine sequences across the Jurassic Tethys realm.

Morphology & Notable Features:

Reineckia anceps exhibits an involute shell with smooth inner whorls and strong, rounded primary ribs that often bifurcate as they cross the flanks. Its shell is moderately compressed with a relatively narrow venter, giving it a streamlined yet ribbed appearance. The ribbing and whorl structure provide excellent examples of Callovian ammonite evolution.

This 5.5″ specimen is notable for its well-preserved ornamentation and defined ribbing—traits that make it both visually striking and scientifically valuable.

Authenticity & Guarantee:

All our fossils are 100% genuine specimens and come with a Certificate of Authenticity. Every piece is professionally prepared, stabilised, and carefully chosen for its quality and educational or display potential.

Perfect For:

• Fossil collectors and natural history curators
• Geological educators and academic research
• Decorative and educational displays
• Gifts for palaeontology enthusiasts

Capture a moment from the Jurassic seas with this stunning Reineckia anceps ammonite from the classic Middle Callovian strata of Vienne, France—a prized addition to any fossil collection!