A dendrobranchiate, Peisos petrunkevitchi (Decapoda, Sergestidae), with reptant-like sperm: a spermiocladistic assessment

Autor:	Antonio Medina, Marcelo A. Scelzo
Rok vydání:	2004
Předmět:	biology Spermatozoon Decapoda Cell Biology Anatomy biology.organism_classification Crustacean Sperm medicine.anatomical_structure Phylogenetics medicine Ultrastructure Animal Science and Zoology Sergestidae Acrosome Ecology Evolution Behavior and Systematics
Zdroj:	Acta Zoologica. 85:81-89
ISSN:	1463-6395 0001-7272
DOI:	10.1111/j.0001-7272.2004.00160.x
Popis:	Scelzo, M. A. and Medina, A. 2004. A dendrobranchiate, Peisos petrunkevitchi (Decapoda, Sergestidae), with reptant-like sperm: a spermiocladistic assessment. — Acta Zoologica (Stockholm) 85 : 81-89 The spermatozoon of Peisos petrunkevitchi differs significantly from those of any of the investigated dendrobranchiates in the anterior fusiform acrosome, lacking a spike, and embedded in (instead of capping) the nuclear region. In contrast, the position of the acrosome and the internal arrangement of its contents, as well as the apomorphic presence of a pair of centrioles (absent in all known dendrobranchiate spermatozoa) at the base of the acrosomal perforatorium, indicate a close affinity between this sperm plan and that found in reptants, especially anomurans and brachyurans. Based on the present and previous observations on decapod spermatozoal ultrastructure, we review the phylogeny of dendrobranchiate spermatozoa in the perspective of most recent phylogenetic analyses of malacostracan crustaceans.
Databáze:	OpenAIRE
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