Does mutual sexual selection explain the evolution of head crests in pterosaurs and dinosaurs

@article{Hone2012DoesMS,
  title={Does mutual sexual selection explain the evolution of head crests in pterosaurs and dinosaurs},
  author={David W. E. Hone and Darren Naish and Innes C. Cuthill},
  journal={Lethaia},
  year={2012},
  volume={45},
  pages={139-156}
}
Hone, D.W.E., Naish, D. & Cuthill, I.C. 2011: Does mutual sexual selection explain the evolution of head crests in pterosaurs and dinosaurs? Lethaia, Vol. 45, pp. 139–156. Cranial ornamentation is widespread throughout the extinct non-avialian Ornithodira, being present throughout Pterosauria, Ornithischia and Saurischia. Ornaments take many forms, and can be composed of at least a dozen different skull bones, indicating multiple origins. Many of these crests serve no clear survival… 

Figures and Tables from this paper

Patterns of divergence in the morphology of ceratopsian dinosaurs: sympatry is not a driver of ornament evolution

The prediction of the species recognition hypothesis, and thus the idea that ornamentation evolved as a species recognition mechanism, has no statistical support among known ceratopsians.

Can social and sexual selection explain the bizarre snout of proterosuchid archosauriforms?

Mutual social and/or sexual selection is favoured here as the most unambiguously supported explanation for the function and origin of the bizarre snout of proterosuchids based on several lines of evidence, including costliness, positive allometry, positive changes in growth rates and modern analogues.

The nature of allometry in an exaggerated trait: The postocular flange in Platyneuromus Weele (Insecta: Megaloptera)

An ancestral condition of dual incipient ornamentation in Platyneuromus is suggested, with a subsequent departure of size and shape of POF in males, triggered by sexual selection.

Adaptive evolution of a derived radius morphology in manakins (Aves, Pipridae) to support acrobatic display behavior

This study provides some of the first insight into the osteological evolution of passerine birds, as well as the way in which opposing selective forces can shape skeletal design in these species.

Hairstreak butterflies (Lepidoptera, Lycaenidae) and evolution of their male secondary sexual organs

It is concluded that male secondary sexual organs in the Atlides Section function primarily for species recognition and thereby promote sympatric diversification.

Evidence for Sexual Dimorphism in the Plated Dinosaur Stegosaurus mjosi (Ornithischia, Stegosauria) from the Morrison Formation (Upper Jurassic) of Western USA

  • E. Saitta
  • Environmental Science, Geography
    PloS one
  • 2015
It is shown that dimorphism in the shape of the dermal plates of Stegosaurus mjosi (Upper Jurassic, western USA) does not result from non-sex-related individual, interspecific, or ontogenetic variation and is most likely a sexually dimorphic feature.

Ontogeny of a sexually selected structure in an extant archosaur Gavialis gangeticus (Pseudosuchia: Crocodylia) with implications for sexual dimorphism in dinosaurs

Assessment of the dimorphism of G. gangeticus across 106 specimens shows that the presence of a narial fossa diagnoses adult male gharials, which is very difficult to detect in the absence of sex specific characters, such as the narials.

Protracted growth impedes the detection of sexual dimorphism in non‐avian dinosaurs

Using body‐size data from both Alligator mississippiensis and Rhea americana, which phylogenetically bracket the dinosaurs, it is demonstrated that even when there is strong dimorphism in a species, random sampling of populations of individuals characterized by sustained periods of growth can result in the loss of this signal.

The ‘species recognition hypothesis’ does not explain the presence and evolution of exaggerated structures in non‐avialan dinosaurs

It is concluded that species recognition was not the evolutionary mechanism most likely to be driving the appearance and persistence of exaggerated structures in non-avialan dinosaurs.
...

References

SHOWING 1-10 OF 193 REFERENCES

Bizarre structures in dinosaurs: species recognition or sexual selection? A response to Padian and Horner

It is argued that known examples of exaggerated structures among dinosaurs pass both of these tests, indicating that species recognition is the preferred (though not necessarily sole) explanation for dinosaurian exaggerated structures, and the sexual selection hypothesis remains by far the best-supported explanation.

The long necks of sauropods did not evolve primarily through sexual selection

There is no convincing evidence that sexual selection was the primary force driving the evolution of sauropod necks, and the traditional hypothesis that sauro pod necks evolved primarily due to the feeding benefits that they conferred is, by comparison, far better supported.

Phylogenetic evidence for multiple losses of a sexually selected character in phrynosomatid lizards

  • J. Wiens
  • Biology
    Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 1999
A phylogenetic approach was used to examine macro–evolutionary patterns of change in sexually dichromatic display coloration among 130 taxa of phrynosomatid lizards and showed repeated losses of sexual dimorphism, which occur through losses of conspicuous male coloration or gains of conspicuous female coloration.

Positive Allometry and the Prehistory of Sexual Selection

The results question the popular view that the elaborated structures of these fossil species evolved as thermoregulatory organs and provide evidence in support of the hypothesis that Pteranodon crests and eupelycosaur sails are among the earliest and most extreme examples of elaborate sexual signals in the evolution of terrestrial vertebrates.

An Egg-Adult Association, Gender, and Reproduction in Pterosaurs

Examples of Darwinopterus preserved together with an egg from the Jurassic of China demonstrate that males of this pterosaur had a relatively small pelvis and a large cranial crest, whereas females had a comparatively largepelvis and no crest.

The evolution of ‘bizarre structures’ in dinosaurs: biomechanics, sexual selection, social selection or species recognition?

It is proposed that species recognition may have been a more general force that drove the evolution of bizarre structures in dinosaurs, and the bizarre structures communicate to other individuals a variety of possible associational cues.

Quantitative aspects of relative growth and sexual dimorphism in Protoceratops

The Upper Cretaceous Djadochta Formation of Mongolia has yielded a remarkable ontogenetic series of skulls and skeletons of the primitive ceratopsian dinosaur, Protoceratops andrewsi. Twenty-four

Mutual ornamentation, sexual selection, and social dominance in the black swan

The curled feathers in the black swan Cygnus atratus appear to function as a signal of social dominance, which is highly correlated with reproductive success and is therefore a reliable signal of parental quality in mate choice.

Scleromochlus taylori and the origin of dinosaurs and pterosaurs

A reanalysis of crown–group archosaur relationships confirms the split into Crurotarsi (crocodile relatives) and Ornithodira (bird relatives), as well as the clear division of Ornithadira into Pterosauria and Dinosauromorpha.

Mutual sexual selection in a monogamous seabird

The results of a study of mate preferences of the crested auklet Aethla cristatella, a monogamous seabird in which both sexes are ornamented, confirm the idea that ornaments expressed in both sexes could be favoured by mutual mating preferences.
...