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SummaryThis note reports the occurrence of Hapalotrema postorchis Rao 1976 collected from an aortic aneurysm in a green turtle (Chelonia mydas Linnaeus 1758) found on the coast of Brazil. Besides the vascular lesion, granulomatous reactions with foreign -body giant cells were found surrounding the parasite eggs in the heart, intestines, liver, pancreas, spleen, brain and kidneys. This paper presents the fi rst report of H. postorchis and accompanying lesions in a green sea turtle from the western South Atlantic Ocean.

A b s t r a c t Exposure of A. mellifera workers to CO 2 has been reported to decrease life span, induce behavioral changes, and inhibit the development of some glands and the ovaries. However, the use of CO 2 is currently practiced among beekeepers and how the development of workers' ovaries are affected is unknown. The present work aimed to evaluate the effect of CO 2 on the ovaries of A. mellifera workers, using a morphological approach. Newly emerged, and 3, 5, and 10-day-old workers were exposed to saturated CO 2 for 30 seconds, more than once. The ovaries were examined under light (LM) and transmission electron microscopy (TEM). The ovaries of narcotized, 5-day-old workers exhibited long ovarioles with well-developed germarium, although oogenesis showed little development. While in the control group, the ovaries already exhibited cysts with cystocytes forming rosettes. At 10-days-old, the ovaries feature was variable; some of the ovaries showed ovarioles with many rosette cysts while others showed a high intensity of disorganization due to the beginning of cell death. The ovarioles of the ovaries of 15-day-old treated workers were morphologically varied as oogenesis showed little or no advance. In others cases, a complete disorganization with swollen cells and cell death features were observed. Germ cells of the ovaries of CO 2 -treated workers exhibited well-structured organelles, such as the Golgi complex, and larger amounts of mitochondria in the cytoplasm than the control group, but there was disorganization of the endoplasmic reticulum membranes. Our fi ndings revealed that the exposure of workers to CO 2 promotes impairment of oogenesis and ovarian degradation.