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| | Neotropical Entomology - Comparative anatomy of the male reproductive internal organs of 51 species of bees (Site not responding. Last check: 2007-10-07) |
 | | The remaining internal organs of the MRA, except for the ejaculatory duct and the accessory glands, also form a globular unit encapsulated by the scrotal membrane, which may be elongated (Fig. |
 | | The ejaculatory duct is thicker, and, in some species, it may even present a complex pattern, such as longitudinal fissures (Figs. |
 | | Ultrastructure of the ducts of the reproductive tract of males of Melipona bicolor Lepeletier (Hymenoptera, Apidae, Meliponini). |
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