File:Maximum estimate size comparison by harry the fox-d60djyx.jpg
Mammals[]
Heaviest prehistoric mammals[]
A list of prehistoric mammals over 10 metric tonnes.
- Basilosaurus (38.6-?60.2 tonnes/ 40-60.8 tons)
- Basiloterus (30-?40 tonnes/31-?40 tons)
- Indricotherium (12-15 tonnes/12-16 tons)
- Deinotherium (10-14 tonnes/10-15 tons)
- Mammuthus imperator (12.5 tonnes/13 tons)
Longest prehistoric mammals[]
A list of all prehistoric mammals equal to or longer than 8 metres.
- Basilosaurus (18-21 metres/59.1-?70.8 feet)
- Zueglodon (12.3-17 metres/40-55 feet)
- Basiloterus (10-?13 metres/33-?42.6 feet)
- Deinotherium (8.8-12.5 metres/29-41 feet)
- Indricotherium (9-12 metres/30.8-39.3 feet)
- Zygorhiza (6-8 metres/19.6-25 feet)
Icthyosaurs[]
Longest Icthyosaurs[]
A list of all icthyosaurs equal to or longer than 9 metres.
- Shonisaurus (18-23 metres/59-75 feet)
- Himalayasaurus (14.3 metres/46.9 feet)
- Temnodontosaurus (13.4 metres/44 feet)
- Cymbospondylus (10-11.6 metres/33-38 feet)
Smallest Icthyosaurs[]
A list of all icthyosaurs under 3 metres.
- Chaohusaurus(60 centimetres/2 feet)
- Mixosaurus (1.1 metres/3.8 feet)
- Eurhinosaurus (1.5 metres/4.7 feet)
Plesiosaurs[]
Longest Plesiosaurs[]
A list of all plesiosaurs equal to or longer than 9 metres.
- Elasmosaurus (15 meters/49 feet)