Evolution and diversification of a sexually dimorphic luminescent system in ponyfishes (Teleostei: Leiognathidae), including diagnoses for two new genera

@article{Sparks2005EvolutionAD,
  title={Evolution and diversification of a sexually dimorphic luminescent system in ponyfishes (Teleostei: Leiognathidae), including diagnoses for two new genera},
  author={John S. Sparks and Paul V. Dunlap and W. Leo Smith},
  journal={Cladistics},
  year={2005},
  volume={21}
}
A phylogeny was generated for Leiognathidae, an assemblage of bioluminescent, Indo‐Pacific schooling fishes, using 6175 characters derived from seven mitochondrial genes (16S, COI, ND4, ND5, tRNA‐His, tRNA‐Ser, tRNA‐Leu), two nuclear genes (28S, histone H3), and 15 morphological transformations corresponding to features of the fishes' sexually dimorphic light‐organ system (LOS; e.g., circumesophageal light organ, lateral lining of the gas bladder, transparent flank and opercular patches… 
A Clade of Non-Sexually Dimorphic Ponyfishes (Teleostei: Perciformes: Leiognathidae): Phylogeny, Taxonomy, and Description of a New Species
TLDR
It is shown that the evolution of the leiognathid LOS can be traced from a “simple” non-sexually dimorphic circumesophageal light organ to a complex and species-specific luminescence system involving not only major structural modifications of the light organ itself but also numerous associated tissues.
Evolution of the light organ system in ponyfishes (Teleostei: Leiognathidae)
TLDR
Both internal and external sexual dimorphism in the ponyfish LOs were recovered as most likely to have evolved in the common ancestor of Leiognathidae, and likelihood‐based correlation analyses indicate that the evolution ofinternal and external dimorphisms in males is statistically correlated.
Description of a new genus of ponyfishes (Teleostei: Leiognathidae), with a review of the current generic-level composition of the family.
TLDR
Photolateralis, new genus, is unique among ponyfishes in possessing a translucent mid-lateral flank stripe, which depending on the species, may be either a composite "stripe" comprised of numerous independent translucent windows, or a continuous translucent lateral stripe.
Is sexual selection driving diversification of the bioluminescent ponyfishes (Teleostei: Leiognathidae)?
TLDR
The results suggest that if sexual selection is occurring in ponyfish evolution, it is likely acting only as a genetic isolating mechanism that has allowed ponyfishes to continuously diversify over time, with no overall impact on increases in diversification rate or morphological disparity.
A New Species of Ponyfish (Teleostei: Leiognathidae: Photoplagios) from Madagascar, with a Phylogeny for Photoplagios and Comments on the Status of Equula lineolata Valenciennes
TLDR
A phylogeny for Photoplagios is provided based on the simultaneous analysis of anatomical features of the light-organ system and nucleotide characters and the taxonomic status of Equula lineolata Valenciennes is discussed, and the species is concluded to be a nomen dubium of uncertain placement beyond the family level.
Geometric morphometrics uncovers a new species of ponyfish (Teleostei: Leiognathidae: Equulites), with comments on the taxonomic status of Equula berbis Valenciennes
TLDR
A new species of Equulites is revealed using geometric morphometric techniques and is herein described, and the taxonomic status of Equula berbis Valenciennes is reviewed and is concluded to be a nomen dubium of uncertain placement beyond the family level.
A new record of ponyfish Deveximentum megalolepis (Perciformes: Leiognathidae) in Beibu Gulf of China
TLDR
The COI sequence analysis supported the validity of D. megalolepis at genetic level, however, the genetic distance between Chinese and Philippine individuals was about 1.2% and they formed two lineages in gene tree, which may be caused by the geographical distance.
Phylogenetic Diversity and Cosymbiosis in the Bioluminescent Symbioses of “Photobacterium mandapamensis”
TLDR
The results, which are the first report of bacterial cosymbiosis in fish light organs and the first demonstration that P. leiognathi is not the exclusive light organ symbiont ofLeiognathid fishes, demonstrate that the host species ranges of P. mandapamensis and P.LeIognathi are substantially distinct.
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References

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A Clade of Non-Sexually Dimorphic Ponyfishes (Teleostei: Perciformes: Leiognathidae): Phylogeny, Taxonomy, and Description of a New Species
TLDR
It is shown that the evolution of the leiognathid LOS can be traced from a “simple” non-sexually dimorphic circumesophageal light organ to a complex and species-specific luminescence system involving not only major structural modifications of the light organ itself but also numerous associated tissues.
Molecular phylogeny and possible scenario of ponyfish (Perciformes:Leiognathidae) evolution.
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TLDR
A bioluminescent signaling function by males is suggested for the sexual dimorphism in leiognathids, which may play an important role in the schooling behavior as well as in species and sexual recognition of these coastal fishes.
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TLDR
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TLDR
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Taxonomic analysis of a group of morphologically similar ponyfishes (Perciformes: Leiognathidae) establishes a complex comprising three valid species: Leiognathus aureus Abe and Haneda, 1972, widely
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  • J. Sparks
  • Biology
    Molecular phylogenetics and evolution
  • 2004
PHYSIOLOGICAL AND MORPHOLOGICAL STATE OF THE SYMBIOTIC BACTERIA FROM LIGHT ORGANS OF PONYFISH.
TLDR
A maximalluminescence, minimal-growth bacterial model of this symbiosis is led to.
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