FIG. 9 in New material of Mongolemys elegans Khosatzky and Mlynarski, 1971 (Testudines: Lindholmemydidae), from the Late Cretaceous of Mongolia with comments on bone histology and phylogeny

FIG. 9. Mongolemys elegans, bone macrostructure and microstructure. Photographs of thin sections, all were taken in transmitted light, 40x otherwise is indicated. IGM 90/42, hatchling-juvenile specimen. A, external cortex and part of the cancellous bone of a costal; B–C, internal cortex and part of the cancellous bone of a costal; D, internal cortex and part of the cancellous bone of the hypoplastron; E, cancellous bone of the hypoplastron; F, external cortex of the hypoplastron. IGM 90/12, adult specimen. G, general view of the costal, showing the external, internal, and cancellous bone layers, photograph take in transmitted light, 10x. H, internal cortex of a costal; I, cancellous bone of a costal; J, external cortex of a costal. K–L, osteocytes in the cancellous bone, both taken in transmitted light, 63x oil lens. Abbreviations: cb, cancellous bone; ec, external cortex; ic, internal cortex; os, osteocyte; po, primary osteon; rb, reticular bone; sf, Sharpey's fiber; so, secondary osteon.