opisthoparian

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noun

Any trilobite of the order †Opisthoparia.

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Meanings

nounopisthoparian (plural opisthoparians)

plural opisthoparians

  1. Any trilobite of the order †Opisthoparia.
adjectiveopisthoparian (not comparable)
  1. not comparablebiologyOf a facial suture of a trilobite, terminating along the hind cephalic margin adaxial to the genal angle.
  2. not comparablebiologyOf or relating to the order †Opisthoparia of trilobites.

    Study of silicified ontogenetic series of opisthoparian (Aphelaspis), gonatoparian (Glaphyraspis), and proparian (Hardyoides) trilobites indicates the probable homology of cephalic spines in ptychopariid trilobites.

    1962, Allison R. Palmer, “Comparative Ontogeny of Some Opisthoparian, Gonatoparian and Proparian Upper Cambrian Trilobites”, in Journal of Paleontology, volume 36, number 1, page 87
Cite this entry
APA

opisthoparian. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/opisthoparian

MLA

“opisthoparian.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/opisthoparian. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “opisthoparian,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/opisthoparian.

Source: opisthoparian on Wiktionary, CC BY-SA 4.0.