The largest-documented North American ammonite is Parapuzosia bradyi from the Cretaceous, with specimens measuring 137 cm (4.5 ft) in diameter. An ammonoid from Iran Evolutionary history

The largest ammonite fossil that has been found was 1.8 meters (5.9 feet) across, but it’s living chamber was incomplete. It is of the species Parapuzosia seppenradensis and was found near Westphalia, Germany in 1895.

Parapuzosia seppenradensis is the largest known species of ammonite. [1] It lived during the Lower Campanian Epoch of the Late Cretaceous period, in marine environments in what is now Westphalia, Germany. A specimen, found in Seppenrade near Lüdinghausen, Germany in 1895 measures 1.8 m (5.9 ft) in diameter, although the living chamber is ...

Parapuzosia seppenradensis is the largest known species of ammonite. It lived during the Late Cretaceous period. A specimen found in Germany in 1895 measures 1.8 m (5.9 ft) in diameter, although the living chamber is incomplete.

Nov 10, 2021 · It was during this time that the size of a type of marine mollusk peaked, with the largest species of ammonite reaching sizes up to 2.5 meters (8.2 feet) across. No other ammonite ever reached such a prodigious size – and, as with all outliers, scientists have been keen to understand exactly why.

Apr 19, 2023 · Unearth the secrets of ancient marine life with our latest article on the incredible discovery of the largest ammonite fossil ever found, the Parapuzosia seppenradensis! Dive into the captivating world of these prehistoric creatures, learn about their biology and environment, and marvel at the astounding size of this colossal fossil.

The largest known ammonite is Parapuzosia seppenradensis. An incomplete fossil shell discovered in Germany in 1895 measured 1.95 m (6.4 ft) across, but the complete shell is estimated to have been approximately 2.55 m (8.3 ft).

The largest known species of ammonite is Parapuzosia seppenradensis from the Late Cretaceous. The largest specimen found is 1.8 metres in diameter but is also incomplete. If it were complete, this ammonite's total diameter could have been from 2.5-3.5 metres.

Parapuzosia bradyi is a gigantic species of ammonite, reaching diameters of more than 4.5 ft (1.4 m) by 6 ft (1.8 m). It is the largest species of ammonite in North America. It had a moderately involute shell with flat sides. The inner whorls are slightly oval-shaped with prominent ribbing.

It comprises 154 specimens of large (< 1 m diameter) to giant (> 1m diameter) Parapuzosia from the Santonian and lower Campanian, mostly with stratigraphical information. High-resolution integrated stratigraphy allows for precise trans-Atlantic correlation of these occurrences.