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🧬 Biological Classification (Kingdom to Species)Parapuzosia seppenradensis

Kingdom

Animalia

Phylum

Mollusca

Class

Cephalopoda

Order

Ammonitida

Family

Desmoceratidae

Genus

Parapuzosia

Species

Parapuzosia seppenradensis

Cephalopoda❔ Diet unknown

Parapuzosia

Parapuzosia seppenradensis (Parapuzosia · パラプゾシア・セッペンラデンシス)

🛡️ Conservation Status (IUCN Red List)FOSSIL (Extinct Fossil)

Known only from fossils. The IUCN Red List assesses only species extant since 1500 CE, so fossil taxa are not assigned a category.

Geological Era

Late Cretaceous (~85.7 MYA)

Diet

No data

Length · Height

1.74m · No data

Mass · Top Speed

No data · No data

Habitat & Fossil Locality

Late Cretaceous seas on both sides of the Atlantic (Europe and the Gulf of Mexico)

💡 Everyday Comparisons for Size, Mass & Speed

💡 Its shell diameter of 1.74 m is similar to the height of an adult human, so standing it upright makes it about as tall as a person (Comparison).
💡 The Seppenrade specimen is on display at the LWL Museum of Natural History in Münster, Germany.

Reference standards: coach bus ~12 m, mid-size car ~4.9 m, compact car ~1 t, basketball hoop 3.05 m, credit card 8.56 cm.

#파라푸조시아#Parapuzosia seppenradensis

📖 1. Overview

Parapuzosia seppenradensis is a Late Cretaceous cephalopod known as the largest ammonite in the world. The specimen discovered in 1895 at Seppenrade in Westphalia, Germany is the most famous.

🦴 2. Anatomy & Morphology

The shell diameter of the largest specimen is 1.74 m, and the same study concludes that this species passed through five growth stages as it matured and showed sexual dimorphism in size.

🔍 3. Fossil Record & Paleoecology

Because adult shells are found clustered in narrow areas while remaining rare in nearby strata of the same age, it has been suggested that it may have reproduced once in a lifetime before dying. Whether the increasing size of mosasaurs, the top marine predators of the same era, played a role remains unclear.