protaspis

English

WOTD – 22 May 2016

An illustration from the 11th Edition of Encyclopædia Britannica showing five stages in the life cycle of the trilobite Sao hirsuta

A fossil of the trilobite Phacops rana

Etymology

From prot- +‎ aspis (from Ancient Greek ἀσπίς (aspís, “shield”)).

Pronunciation

• (Received Pronunciation) IPA^(key): /pɹəˈtaspɪs/

  • Audio (Southern England):

    (file)

• (General American) IPA^(key): /pɹəˈtæspəs/
• Hyphenation: prot‧as‧pis

Noun

protaspis (plural protaspides)

1. (paleontology) A stage in the development of a trilobite where the creature has not yet developed articulated segments.

Derived terms

Derived terms

• anaprotaspis
• metaprotaspis
• paraprotaspis
• protaspid

See also

• holaspis
• meraspis

References

• S. M. Gon III (2007 November 8) “Trilobite Reproduction and Development”, in Trilobites.info‎^[1], archived from the original on 26 April 2016.