Epimorphic regeneration of fins was studied in different ray finned fishes (Actinopterygii), but species representing the phylogenetically basal lineages of the taxon have remained outside the attention of researchers. Information on the regenerative abilities of these groups is important both for understanding the evolutionary origins of the epimorphic regeneration phenomenon and for assessing the universality of regen erative potencies in Actinopterygii. Addressing this problem, we studied for the first time fin regeneration in two members of the archaic family Polypteridae: the ropefish (Erpetoichthys calabaricus) and the Senegal bichir (Polypterus senegalus). Along with the ability to regenerate the bony rays of fins, widespread among Actinopterygii, polypterids show the ability to effectively regenerate the endoskeleton and musculature of their fins. This unusual feature allows us to suggest polypterids as new model organisms for the study of the mechanisms of vertebrate limb regeneration.

Тематической интеграцией пространственных данных о природных элементах ландшафтов названо их объединение в одно целое, или систему, на основе единой иерархической генетической классификации природных ландшафтов-систем. Результат тематической интеграции представляется в виде одного векторного слоя площадных объектов ландшафтной ГИС с привязанной к нему таблицей атрибутивных данных. Различные варианты автоматизированного оформления слоя позволяют получать системные ландшафтные карты, к которым отнесены карты природных ландшафтов разных иерархических уровней и карты свойств их элементов. В настоящее время концепция, технология и инструменты тематической интеграции пространственных данных о природных элементах ландшафтов апробированы при ландшафтном картографировании Саратовской области на географической основе масштаба 1:1 500 000. Представленная в статье новая методология интеграции пространственных данных о элементах ландшафта в геоинформационной среде позволяет делать картографический синтез обратимым, а его результаты обновляемыми.

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The naked mole rat (Heterocephalus glaber, Rüppell, 1842) is a unique eusocial rodent with unusually long lifespan. Therefore, the study of spontaneous and experimentally induced pathologies in these animals is one of the most important tasks of gerontology. Various infections, noninfectious pathologies (including age-dependent changes), and tumors have been described in the naked mole rat. The most frequent pathologies are traumas (bite wounds), purulent and septic complications of traumatic injuries, renal tubular calcinosis, chronic progressive nephropathy, hepatic hemosiderosis, testicular interstitial cell hyperplasia, calcinosis cutis, cardiomyopathy, and dysbiosis-related infectious lesions of the digestive system. However, the summarized data on pathology (including tumor incidence) and on the causes of mortality are insufficient. There are only few publications about the results of experiments where pathologies were induced in the naked mole rat. All these problems could be subjects for promising future studies without which adequate studies on mechanisms providing the long lifespan of the naked mole rat are impossible, as well as the elucidation of causes of tumor resistance of this species.