Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/17742
Título: Comparative morphology of spermatozoa and reproductive systems of zorapteran species from different world regions (Insecta, Zoraptera)
Autor: Dallai, Romano
Gottardo, Marco
Mercati, David
Machida, Ryuichiro
Mashimo, Yuta
Matsumura, Yoko
Rafael, José Albertino
Beutel, Rolf Georg
Palavras-chave: Animals Experiment
Animals Tissue
Axoneme
Comparative Anatomy
Female
Genital System
Male
Nonhuman
Spermatheca
Spermatozoon
Ultrastructure
Zoraptera
Zorotypus Caudelli
Zorotypus Guineensis
Zorotypus Hubbardi
Zorotypus Huxleyi
Zorotypus Impolitus
Zorotypus Magnicaudelli
Zorotypus Weidneri
Africa
Anatomy And Histology
Animals
Cytology
Evolution
Female Genital System
Insect
Malaysia
Male Genital System
South America
Species Difference
Spermatozoon
Hexapoda
Insecta
Zoraptera
Zorotypus
Zorotypus Hubbardi
Africa
Animal
Biological Evolution
Female
Genitalia, Female
Genitalia, Male
Insects
Malaysia
Male
South America
Species Specificity
Spermatozoa
Data do documento: 2014
Revista: Arthropod Structure and Development
É parte de: Volume 43, Número 4, Pags. 371-383
Abstract: The male and female reproductive apparatus of Zorotypus magnicaudelli (Malaysia), Zorotypus huxleyi (Ecuador) and Zorotypus weidneri (Brazil) were examined and documented in detail. The genital apparatus and sperm of the three species show only minor differences. The testes are larger in Z. magnicaudelli. Z. huxleyi lacks the helical appendage in the accessory glands. A long cuticular flagellum is present in Z. magnicaudelli and in the previously studied Zorotypus caudelli like in several other species, whereas it is absent in Z. weidneri, Z. huxleyi, Zorotypus hubbardi, Zorotypus impolitus and Zorotypus guineensis. Characteristic features of the very similar sperm are the presence of: a) two dense arches above the axoneme; b) a 9+9+2 axoneme with detached subtubules A and B of doublets 1 and 6; c) the axonemal end degenerating with enlarging accessory tubules; d) accessory tubules with 17 protofilaments; e) three accessory bodies beneath the axoneme; and f) two mitochondrial derivatives of equal shape. The first characteristic (a) is unknown outside of Zoraptera and possibly autapomorphic. The sperm structure differs distinctly in Z. impolitus and Z. hubbardi, which produce giant sperm and possess a huge spermatheca. The presence of the same sperm type in species either provided with a sclerotized coiled flagellum in males or lacking this structure indicates that a different organization of the genital apparatus does not necessarily affect the sperm structure. The flagellum and its pouch has probably evolved within Zoraptera, but it cannot be excluded that it is a groundplan feature and was reduced several times. The fossil evidence and our findings suggest that distinct modifications in the genital apparatus occurred before the fragmentation of the Gondwanan landmass in the middle Cretaceous. © 2014 Elsevier Ltd.
DOI: 10.1016/j.asd.2014.03.001
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