Splenial

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Hemimandible of Trimerorhachis; the splenial (labeled "sp") is visible on the interior surface Image from page 37 of "Water reptiles of the past and present" (1914) (14586264740).jpg
Hemimandible of Trimerorhachis ; the splenial (labeled "sp") is visible on the interior surface
Skull and jaws diagram of the primitive synapsid Dimetrodon, showing location of the splenial Dimetrodon skull lateral.svg
Skull and jaws diagram of the primitive synapsid Dimetrodon , showing location of the splenial

The splenial is a small bone in the lower jaw of reptiles, amphibians and birds, usually located on the lingual side (closest to the tongue) between the angular and surangular. [1] [2]

References

  1. Romer, A. S. (1956). Osteology of the Reptiles. 772 pp. Chicago & London.
  2. Watson, D. M. S. (1912). LXVII.—On some reptilian lower jaws. Journal of Natural History, 10(60), 573-587.