Aberrant spermatogenesis in the two species Stenognathellus denisi (Katiannidae) and Sminthurides aquaticus (Sminthurididae) is described. An ultrastructural study of spermatogenesis in these species has allowed us to reveal the presence of two types of secondary spermatocytes; one with a normal appearance, the other one is characterized by a small size, a reduced cytoplasm (showing only two centrioles), and a nucleus with very condensed chromatin. These latter aberrant cells are not able to perform the second meiotic division and will degenerate. This finding allows us to extend the identification of an aberrant spermatogenesis and the consequent postzygotic sex determination to two more families of Symphypleona.

Dallai, R., Fanciulli, P.P., Frati, F. (2004). New data on the aberrant spermatogenesis of Collembola. PEDOBIOLOGIA, 48, 487-492 [10.1016/j.pedobi.2004.05.006].

New data on the aberrant spermatogenesis of Collembola

DALLAI, ROMANO;FANCIULLI, PIETRO PAOLO;FRATI, FRANCESCO
2004-01-01

Abstract

Aberrant spermatogenesis in the two species Stenognathellus denisi (Katiannidae) and Sminthurides aquaticus (Sminthurididae) is described. An ultrastructural study of spermatogenesis in these species has allowed us to reveal the presence of two types of secondary spermatocytes; one with a normal appearance, the other one is characterized by a small size, a reduced cytoplasm (showing only two centrioles), and a nucleus with very condensed chromatin. These latter aberrant cells are not able to perform the second meiotic division and will degenerate. This finding allows us to extend the identification of an aberrant spermatogenesis and the consequent postzygotic sex determination to two more families of Symphypleona.
2004
Dallai, R., Fanciulli, P.P., Frati, F. (2004). New data on the aberrant spermatogenesis of Collembola. PEDOBIOLOGIA, 48, 487-492 [10.1016/j.pedobi.2004.05.006].
File in questo prodotto:
File Dimensione Formato  
Dallai et al 2004 New data on the aberrant spermatogenesis of Collembola.pdf

non disponibili

Tipologia: Post-print
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 1.14 MB
Formato Adobe PDF
1.14 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.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/32405
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo