Ultrastructure of the spermatozoon of Apus apus (Linnaeus 1758), the common swift (Aves; Apodiformes; Apodidae), with phylogenetic implications
Abstract The spermatozoon of Apus apus is typical of non‐passerines in many respects. Features shared with palaeognaths and the Galloanserae are the conical acrosome, shorter than the nucleus; the presence of a proximal as well as distal centriole; the elongate midpiece with mitochondria grouped aro...
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crwiley:10.1111/j.1463-6395.2005.00204.x 2024-06-02T07:58:49+00:00 Ultrastructure of the spermatozoon of Apus apus (Linnaeus 1758), the common swift (Aves; Apodiformes; Apodidae), with phylogenetic implications Jamieson, Barrie G. M. Tripepi, Sandro 2005 http://dx.doi.org/10.1111/j.1463-6395.2005.00204.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1463-6395.2005.00204.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1463-6395.2005.00204.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Acta Zoologica volume 86, issue 4, page 239-244 ISSN 0001-7272 1463-6395 journal-article 2005 crwiley https://doi.org/10.1111/j.1463-6395.2005.00204.x 2024-05-03T11:46:12Z Abstract The spermatozoon of Apus apus is typical of non‐passerines in many respects. Features shared with palaeognaths and the Galloanserae are the conical acrosome, shorter than the nucleus; the presence of a proximal as well as distal centriole; the elongate midpiece with mitochondria grouped around an elongate distal centriole; and the presence of a fibrous or amorphous sheath around the principal piece of the axoneme. The perforatorium and endonuclear canal are lost in A. apus as in some other non‐passerines. All non‐passerines differ from palaeognaths in that the latter have a transversely ribbed fibrous sheath whereas in non‐passerines it is amorphous, as in Apus , or absent. The absence of an annulus is an apomorphic but homoplastic feature of swift, psittaciform, gruiform and passerine spermatozoa. The long distal centriole, penetrating the entire midpiece, is a remarkably plesiomorphic feature of the swift spermatozoa, known elsewhere only in palaeognaths. The long centriole of Apus , if not a reversal, would be inconsistent with the former placement of the Apodiformes above the Psittaciformes from DNA–DNA hybridization. In contrast to passerines, in A. apus the microtubules in the spermatid are restricted to a transient single row encircling the cell. The form of the spermatozoon fully justifies the exclusion of swifts from the passerine family Hirundinidae. Article in Journal/Newspaper Apus apus Wiley Online Library Acta Zoologica 86 4 239 244 |
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Wiley Online Library |
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English |
description |
Abstract The spermatozoon of Apus apus is typical of non‐passerines in many respects. Features shared with palaeognaths and the Galloanserae are the conical acrosome, shorter than the nucleus; the presence of a proximal as well as distal centriole; the elongate midpiece with mitochondria grouped around an elongate distal centriole; and the presence of a fibrous or amorphous sheath around the principal piece of the axoneme. The perforatorium and endonuclear canal are lost in A. apus as in some other non‐passerines. All non‐passerines differ from palaeognaths in that the latter have a transversely ribbed fibrous sheath whereas in non‐passerines it is amorphous, as in Apus , or absent. The absence of an annulus is an apomorphic but homoplastic feature of swift, psittaciform, gruiform and passerine spermatozoa. The long distal centriole, penetrating the entire midpiece, is a remarkably plesiomorphic feature of the swift spermatozoa, known elsewhere only in palaeognaths. The long centriole of Apus , if not a reversal, would be inconsistent with the former placement of the Apodiformes above the Psittaciformes from DNA–DNA hybridization. In contrast to passerines, in A. apus the microtubules in the spermatid are restricted to a transient single row encircling the cell. The form of the spermatozoon fully justifies the exclusion of swifts from the passerine family Hirundinidae. |
format |
Article in Journal/Newspaper |
author |
Jamieson, Barrie G. M. Tripepi, Sandro |
spellingShingle |
Jamieson, Barrie G. M. Tripepi, Sandro Ultrastructure of the spermatozoon of Apus apus (Linnaeus 1758), the common swift (Aves; Apodiformes; Apodidae), with phylogenetic implications |
author_facet |
Jamieson, Barrie G. M. Tripepi, Sandro |
author_sort |
Jamieson, Barrie G. M. |
title |
Ultrastructure of the spermatozoon of Apus apus (Linnaeus 1758), the common swift (Aves; Apodiformes; Apodidae), with phylogenetic implications |
title_short |
Ultrastructure of the spermatozoon of Apus apus (Linnaeus 1758), the common swift (Aves; Apodiformes; Apodidae), with phylogenetic implications |
title_full |
Ultrastructure of the spermatozoon of Apus apus (Linnaeus 1758), the common swift (Aves; Apodiformes; Apodidae), with phylogenetic implications |
title_fullStr |
Ultrastructure of the spermatozoon of Apus apus (Linnaeus 1758), the common swift (Aves; Apodiformes; Apodidae), with phylogenetic implications |
title_full_unstemmed |
Ultrastructure of the spermatozoon of Apus apus (Linnaeus 1758), the common swift (Aves; Apodiformes; Apodidae), with phylogenetic implications |
title_sort |
ultrastructure of the spermatozoon of apus apus (linnaeus 1758), the common swift (aves; apodiformes; apodidae), with phylogenetic implications |
publisher |
Wiley |
publishDate |
2005 |
url |
http://dx.doi.org/10.1111/j.1463-6395.2005.00204.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1463-6395.2005.00204.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1463-6395.2005.00204.x |
genre |
Apus apus |
genre_facet |
Apus apus |
op_source |
Acta Zoologica volume 86, issue 4, page 239-244 ISSN 0001-7272 1463-6395 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1463-6395.2005.00204.x |
container_title |
Acta Zoologica |
container_volume |
86 |
container_issue |
4 |
container_start_page |
239 |
op_container_end_page |
244 |
_version_ |
1800742379148279808 |