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  • Title: [Pigmentation of the outer cornea after removal of the eye from Rana lessonae Camerano larvae].
    Author: Popov DV, Veselago IA, Levina MZ, Golichenkov VA.
    Journal: Arkh Anat Gistol Embriol; 1984 Jun; 86(6):63-9. PubMed ID: 6332599.
    Abstract:
    Dynamics and morphological peculiarities of pigmentation in the external cornea after removal of the eye in larvae of Rana lessonae Camerano have been studied in situ depending on the developmental stage during prometamorphosis. The results are compared with the previously obtained data for tadpoles of Rana temporaria (D. V. Popov, Sokolova Z. A., Kalistratova E. N. et al., 1982). The process of pigmentation in the cornea does not depend on the developmental stage, proceeds with a constant rate and accomplishes before the beginning of the metamorphous climax. In the Rana lessonae tadpoles the dermal chromatomorphous units differentiate earlier than in the Rana temporaria larvae. The period of metamorphosis in the R. lessonae is 2 times as long as in the R. temporaria. At the same time, transplantation of the epidermal melanophores during the process of the cornea pigmentation in these species is realized with the same rate. Thus, in this case, the phenomena occurring at the cellular and organism levels are rather autonomous. The differences revealed between the cornea pigmentation in the R. lessonae and R. temporaria larvae are explained as the phenomenon of interlevel heterochrony in ontogenesis.
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