[SUB- 7 c.] A division or subdivision of a region, esp. of a geographical region, with reference to the distribution of animals.
1864. A. R. Wallace, in Proc. Zool. Soc., 273. Confining our attention now to the Australian region only, we may divide it into three subregions—Australia, the Pacific Islands, and the Austro-Malayan group—each of which has a distinctive character.
1869. Sclater, Ibid., 125. The true Australian subregion (Subregio australis), comprising continental Australia, with, perhaps, the exception of the northern promontory of Cape York.
1882. Minchin, Unipl. Kinemat., 194. That portion of the space bounded by the contour DEF which is not included in any of the sub-regions A, B, C.
Hence Subregional a., of or pertaining to a subregion.
1875. Encycl. Brit., III. 747, marg. Their [sc. the Galapagos] Subregional assignation doubtful.
