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Prehistoric Life

How long was Paradoxides davidis?

Paradoxides davidis had a body length of about 45 cm (1 ft 6 in).

What is measured: Large trilobite, body length

Paradoxides davidis (45 cm) drawn to scale beside a bowling pin (38.1 cm) and an adult person (1.7 m)
Drawn to scale, from left to right: Bowling pin (38.1 cm), Paradoxides davidis (45 cm) and Adult person (1.7 m).

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How big is that, really?

  • About 1.2× the height of a bowling pin
  • As long as about 5 credit cards end to end
  • About 3.1× the height of a smartphone
  • About 26% of the height of an adult person
  • About 23% of the height of a doorway

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Facts about Paradoxides davidis

Paradoxides davidis was a large Cambrian trilobite with a broad, segmented body and prominent crescent-shaped eyes.

Source: Natural History Museum, London — Trilobites; British Geological Survey — Cambrian fossils

Prehistoric Life

NameSizeCompared with Paradoxides davidis
Beelzebufo ampinga40 cm (1 ft 4 in)0.89×
Hyracotherium leporinum40 cm (1 ft 4 in)0.89×
Paradoxides davidis45 cm (1 ft 6 in)this page
Archaeopteryx50 cm (1 ft 8 in)1.1×
Yi qi60 cm (2 ft)1.3×
Thylacinus cynocephalus60 cm (2 ft)1.3×
Leaellynasaura amicagraphica60 cm (2 ft)1.3×
Acanthostega gunnari60 cm (2 ft)1.3×
Meganeura monyi70 cm (2 ft 4 in)1.6×
Pulmonoscorpius kirktonensis70 cm (2 ft 4 in)1.6×

Test your sense of scale

Which is bigger: Paradoxides davidis or Yi qi?

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