Is sexual selection driving diversification of the bioluminescent ponyfishes (Teleostei: Leiognathidae)?

  title={Is sexual selection driving diversification of the bioluminescent ponyfishes (Teleostei: Leiognathidae)?},
  author={Prosanta Chakrabarty and Matthew P. Davis and W. Leo Smith and Zachary H. Baldwin and John S. Sparks},
  journal={Molecular Ecology},
Sexual selection may facilitate genetic isolation among populations and result in increased rates of diversification. As a mechanism driving diversification, sexual selection has been invoked and upheld in numerous empirical studies across disparate taxa, including birds, plants and spiders. In this study, we investigate the potential impact of sexual selection on the tempo and mode of ponyfish evolution. Ponyfishes (Leiognathidae) are bioluminescent marine fishes that exhibit sexually… 

Patterns of Phenotypic Variation in the Mouth Size of Lanternfishes (Teleostei: Myctophiformes)

This study investigates the variation in mouth size of lanternfishes in an effort to better understand potential mechanisms of speciation in this group, as previous studies have indicated that there is considerable variation in the size and biodiversity of prey items of Lanternfishes.

Description of a new genus of ponyfishes (Teleostei: Leiognathidae), with a review of the current generic-level composition of the family.

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.

Parental care in the Cuatro Ciénegas cichlid, Herichthys minckleyi (Teleostei: Cichlidae)

Compared to the closely related monogamous Rio Grande cichlid, H. cyanoguttatus, males of H. minckleyi were present at their nests less often and performed lower rates of aggressive offspring defense, and females compensated for the absence of their mates by performing higher levels of offspring defense.

Phylogeny and phylogeography of the family Kyphosidae (Perciformes: Teleostei)

Synonyms among Atlantic and Indo-Pacific taxa show that several sea chub species are more widespread than previously thought.

A new record of ponyfish Deveximentum megalolepis (Perciformes: Leiognathidae) in Beibu Gulf of China

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.

Evolutionary Relationships of the Deep-Sea Pearleyes (Aulopiformes: Scopelarchidae) and a New Genus of Pearleye from Antarctic Waters

The results represent the most taxonomically comprehensive molecular and total evidence hypotheses of the evolutionary relationships of the pearleyes to date, and these frameworks are used to comment on the historical biogeography of this widespread group.

Anatomical basis of diverse jaw protrusion directionality in ponyfishes (Family Leiognathidae)

The anatomical basis of protrusion directionality was examined by measuring eight traits associated with the size and positioning of oral jaw bones by representing every major lineage within the ponyfish family.

Molecular ecology studies of species radiations: current research gaps, opportunities and challenges

It is suggested that WGS and targeted (‘capture’) resequencing emerge as the methods of choice for scaling up the sampling of populations, species and genomes, including currently understudied organismal groups and the genes or regulatory elements expected to matter most to species radiations.

Species-specific bioluminescence facilitates speciation in the deep sea

It is shown, for the first time, that deep-sea fishes that possess species-specific bioluminescent structures (e.g., lanternfishes, dragonfishes) are diversifying into new species at a more rapid rate than deep-SEA fishes that utilize biol Luminescence in ways that would not promote isolation of populations.



A Clade of Non-Sexually Dimorphic Ponyfishes (Teleostei: Perciformes: Leiognathidae): Phylogeny, Taxonomy, and Description of a New Species

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

It is hypothesized that the species‐specific, sexually dimorphic internal and external modifications of the leiognathid LOS provide compelling evidence for an assortative mating scheme in which males use species‐ specific patterns of lateral luminescence signaling to attract mates, and that this system functions to maintain reproductive isolation in these turbid coastal environments.

Sexual selection driving diversification in jumping spiders

  • S. MastaW. Maddison
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 2002
This work provides genetic, behavioral, and simulation data illustrating that the striking and possibly recent divergence in traits of male behavior and morphology among populations of the jumping spider Habronattus pugillis can be attributed to sexual selection.

Evolution of the light organ system in ponyfishes (Teleostei: Leiognathidae)

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.


The phylogenetic distribution of clades with an exceedingly high number of species suggests that traits that confer high rates of diversification evolved independently in different instances and do not characterize the angiosperms as a whole.


A robust phylogenetic framework is developed for 31 taxa from a species-rich group of Neotropical reef fishes using 3230 bp from one mitochondrial and two nuclear gene regions to explore the contribution of large- and small-scale geographic isolation, ecological differentiation, and coloration toward the formation and maintenance of species.

Geometric morphometrics uncovers a new species of ponyfish (Teleostei: Leiognathidae: Equulites), with comments on the taxonomic status of Equula berbis Valenciennes

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.

Phylogeny of Gobioidei and Placement within Acanthomorpha, with a New Classification and Investigation of Diversification and Character Evolution

This study integrates and expands previous molecular phylogenetic hypotheses to infer a comprehensive gobioid phylogeny, including a variety of outgroup taxa included to confirm sister taxon identity and position of the group among other acanthomorphs.