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Prehistoric Life

How long was Olenoides serratus?

An adult Olenoides serratus had a total length of about 10 cm (3.94 in).

What is measured: adult, total body length

Olenoides serratus (10 cm) drawn to scale beside a large coin (2.4 cm) and a smartphone (14.7 cm)
Drawn to scale, from left to right: Large coin (2.4 cm), Olenoides serratus (10 cm) and Smartphone (14.7 cm).

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How big is that, really?

  • A little longer than a credit card
  • About 68% of the height of a smartphone
  • About 26% of the height of a bowling pin
  • About 4.2× the width of a large coin
  • As long as about 14 grains of rice end to end

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Facts about Olenoides serratus

Olenoides was a trilobite whose fossilized legs preserve evidence of paired walking limbs and featherlike gills.

Source: Royal Ontario Museum, Olenoides serratus; Burgess Shale Geoscience Foundation, Olenoides

Prehistoric Life

NameSizeCompared with Olenoides serratus
Marrella splendens2.5 cm (0.98 in)0.25×
Eldredgeops rana5 cm (1.97 in)0.5×
Pikaia gracilens5 cm (1.97 in)0.5×
Titanomyrma giganteum5 cm (1.97 in)0.5×
Tribrachidium heraldicum5 cm (1.97 in)0.5×
Cooksonia pertoni6.5 cm (2.56 in)0.65×
Ottoia prolifica8 cm (3.15 in)0.8×
Olenoides serratus10 cm (3.94 in)this page
Dickinsonia costata14 cm (5.51 in)1.4×
Beelzebufo ampinga40 cm (1 ft 4 in)4×

Test your sense of scale

Which is bigger: Olenoides serratus or Ottoia prolifica?

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