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More model informationThe quadrate of a Rifleman. The rifleman (Acanthisitta chloris) (Māori: tītipounamu) is a small insectivorous passerine bird that is endemic to New Zealand. It belongs to the family Acanthisittidae , the New Zealand wrens, of which it is one of only two surviving species. The rifleman resembles a wren in form, but is not related to the family of true wrens, Troglodytidae, nor the fairy-wrens of Australia. The quadrate bone is part of a skull in most tetrapods, including amphibians, sauropsids (reptiles, birds), and early synapsids. In these animals it connects to the quadratojugal and squamosal in the skull, and forms part of the jaw joint (the other part is the articular bone at the rear end of the lower jaw).
Jan 7th 2018
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