Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny

Valchi, Paula; Ponssa, María Laura; Farías, Alejandro; Volonteri, María Clara; Hermida, Gladys N.

doi:10.1016/j.jcz.2022.11.014

Cited by 5 publications

(1 citation statement)

References 48 publications

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“…Consequently, sperm cells may not contain signi cant phylogenetic information, as functional constraints shaping their ultrastructure may outweigh historical in uences. Recent research has indicated that at least at a generic level, functional constraints do not overpower phylogenetic signals (Valchi et al, 2023). In a recent paper Chernyshev et al (2020) provided some evidence that this applies to nemertean sperm even at higher taxonomic levels.…”

Section: Introductionmentioning

confidence: 99%

Ultrastructure and phylogenetic significance of spermatozoa in Nemertea

Bartolomaeus,

Bronkars,

Adam

et al. 2023

Preprint

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Sperm ultrastructure is frequently employed as a source for phylogenetic inference due to the ease of accessing spermatozoa. Despite being unicellular, sperm cells exhibit a relatively high number of diverse characters and character states. Spermatozoa are subject to strong sexual selection as they are finely tuned for maximizing male reproductive success. Given this strong functional constraint, one might anticipate the emergence of convergent characters in line with similar modes of reproduction. As a result, it might be expected that sperm cells do not possess substantial phylogenetic signal, with functional constraints overshadowing any evolutionary heritage. To test this assumption, we conducted a study on sperm ultrastructure in 12 nemertean species, representing closely related groups and major nemertean lineages. We analyzed these data for their phylogenetic signal within the context of the most recent nemertean phylogenies. Our findings demonstrate that, at all systematic levels, functional constraints imposed by sexual selection or the mode of reproduction do not supersede the influence of historical constraints on sperm ultrastructure.

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Section: Introductionmentioning

confidence: 99%

Ultrastructure and phylogenetic significance of spermatozoa in Nemertea

Bartolomaeus,

Bronkars,

Adam

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Ultrastructure and phylogenetic significance of spermatozoa in Nemertea

Bartolomaeus,

Bronkars,

Adam

et al. 2024

Zoomorphology

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Sperm ultrastructure is frequently employed as a source for phylogenetic inference due to the ease of accessing spermatozoa. Despite being unicellular, sperm cells exhibit a relatively high number of diverse characters and character states. Spermatozoa are subject to strong sexual selection as they are finely tuned for maximizing male reproductive success. Given this strong functional constraint, one might anticipate the emergence of convergent characters in line with similar modes of reproduction. As a result, it might be expected that sperm cells do not possess substantial phylogenetic signal, with functional constraints overshadowing any evolutionary heritage. To test this assumption, we conducted a study on sperm ultrastructure in 11 nemertean species, representing closely related groups and major nemertean lineages. We analyzed these data for their phylogenetic signal within the context of the most recent nemertean phylogenies. Our findings demonstrate that, at all systematic levels, functional constraints imposed by sexual selection, or the mode of reproduction do not supersede the influence of historical constraints on sperm ultrastructure.

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Distinctive spermiogenesis in Aplacophora (Mollusca) has phylogenetic implications

Buckland-Nicks,

Hodgson

2024

Zoomorphology

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Comparative spermatozoa ultrastructure of neotropical grass frogs (genus Leptodactylus) with comments on anuran reproductive modes and phylogeny

Cited by 5 publications

References 48 publications

Ultrastructure and phylogenetic significance of spermatozoa in Nemertea

Ultrastructure and phylogenetic significance of spermatozoa in Nemertea

Ultrastructure and phylogenetic significance of spermatozoa in Nemertea

Distinctive spermiogenesis in Aplacophora (Mollusca) has phylogenetic implications

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