Granular secretion in the kidney sexual segments of female lizards, Cnemidophorus I. lemniscatus (Sauria, Teiidae)

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Abstract
A differentiated segment, analogous in location and structure to the first portion of the sexual segment of the males, but much smaller, is observed in the renal collecting ducts of female C. lemniscatus. In addition to this first portion, with cells full of granules strongly positive to periodic acidleucofuchsin, males have a consecutive second portion, with granules localized only in the apical part of the cells, moderately positive to the reaction mentioned and with a marked affinity for orange G. The two portions of the male sexual segment are considered to correspond to the middle and final parts of the collecting ducts; the initial part in both sexes and the final one in the female are mucigenous.

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