Cauda epididymal spermatozoa of the rufous hare wallaby, Lagorchestes hirsutus (Metatheria, Mammalia) imaged by electron and confocal microscopy

Johnston, S. D., Daddow, L., Carrick, F. N., Jamieson, B. and Smith, L. (2003) Cauda epididymal spermatozoa of the rufous hare wallaby, Lagorchestes hirsutus (Metatheria, Mammalia) imaged by electron and confocal microscopy. Acta Zoologica : morphology and evolution, 84 2: 139-143. doi:10.1046/j.1463-6395.2003.00139.x


Author Johnston, S. D.
Daddow, L.
Carrick, F. N.
Jamieson, B.
Smith, L.
Title Cauda epididymal spermatozoa of the rufous hare wallaby, Lagorchestes hirsutus (Metatheria, Mammalia) imaged by electron and confocal microscopy
Journal name Acta Zoologica : morphology and evolution   Check publisher's open access policy
ISSN 0001-7272
Publication date 2003-01-01
Sub-type Article (original research)
DOI 10.1046/j.1463-6395.2003.00139.x
Open Access Status
Volume 84
Issue 2
Start page 139
End page 143
Total pages 5
Place of publication Oxford
Publisher Blackwell Publishing Ltd
Language eng
Subject C1
270501 Animal Systematics, Taxonomy and Phylogeny
770903 Living resources (flora and fauna)
Abstract The ultrastructure of mature Lagorchestes hirsutus spermatozoa is described for the first time, revealing unusual aspects of sperm structure in macropodid species. The sperm head is ovoid rather than cuneiform, lacks a ventral nuclear groove and has an acrosomal distribution over approximately 85-90% of its dorsal surface. Immediately adjacent to the nuclear membrane the peripheral nucleoplasm in most spermatozoa form an irregular series of distinctive evaginations previously not described in the spermatozoa of any other marsupial. The midpiece is extremely thickened and short, containing no helical network or peripheral plasma membrane specializations. Axonemal structure is unspecialized with no connecting lamellae; dense outer fibres are closely adherent to axonemal doublets. The sperm morphology of this species is highly aberrant in comparison to other macropod taxa and supports the retention of Lagorchestes as a distinctive genus. In light of this new information, skeletal and serological data should be re-evaluated to determine the true taxonomic and phylogenetic position of this species.
Keyword Zoology
Lagorchestes Hirsutus
Cauda Epididymal Spermatozoa
Ultrastructure
Q-Index Code C1
Additional Notes DOI: 10.1046/j.1463-6395.2003.00139.x

 
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Created: Wed, 15 Aug 2007, 05:05:46 EST