The sperm structure of several ladybird species belonging to different subfamilies of Coccinellidae was studied. Three main sperm types were clearly recognized, and were characterized by differences in acrosomal length, the presence of a dense coat around the acrosome, the length of the basal body, the amount of the centriole adjunct material, and the diameter of the mitochondrial derivatives. However, the whole group shares a pattern of the posterior sperm region uncommon for insects, in which the axoneme and other flagellar components are running parallel with the nucleus. As a general conclusion, this study has revealed an inconsistency between the sperm structure and the systematics of the group, indicating that the generic concepts within the group do not reflect a natural classification, a statement also shared by molecular studies.
Dallai, R., Lino-Neto, J., Dias, G., Nere, P.H.A., Mercati, D., Lupetti, P. (2018). Fine structure of the ladybird spermatozoa (Insecta, Coleoptera, Coccinellidae). ARTHROPOD STRUCTURE & DEVELOPMENT, 47(3), 286-298 [10.1016/j.asd.2018.04.001].
Fine structure of the ladybird spermatozoa (Insecta, Coleoptera, Coccinellidae)
Dallai, Romano;Mercati, David;Lupetti, Pietro
2018-01-01
Abstract
The sperm structure of several ladybird species belonging to different subfamilies of Coccinellidae was studied. Three main sperm types were clearly recognized, and were characterized by differences in acrosomal length, the presence of a dense coat around the acrosome, the length of the basal body, the amount of the centriole adjunct material, and the diameter of the mitochondrial derivatives. However, the whole group shares a pattern of the posterior sperm region uncommon for insects, in which the axoneme and other flagellar components are running parallel with the nucleus. As a general conclusion, this study has revealed an inconsistency between the sperm structure and the systematics of the group, indicating that the generic concepts within the group do not reflect a natural classification, a statement also shared by molecular studies.File | Dimensione | Formato | |
---|---|---|---|
Fine structure of the ladybird spermatozoa.pdf
non disponibili
Tipologia:
PDF editoriale
Licenza:
NON PUBBLICO - Accesso privato/ristretto
Dimensione
9.09 MB
Formato
Adobe PDF
|
9.09 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11365/1064083