10.5061/DRYAD.31ZCRJDKM
Peterson, Rose
0000-0002-3953-147X
George Washington University
Sullivan, John
0000-0003-0585-5617
Cornell University
Hopkins, Carl
Cornell University
Santaquiteria, Aintzane
0000-0002-7046-6434
University of Oklahoma
Dillman, Casey
Cornell University
Pirro, Stacy
Iridian Genomes
Betancur, Ricardo
University of Oklahoma
Arcila, Dahiana
University of Oklahoma
Hughes, Lily C.
0000-0003-4006-4036
University of Chicago
OrtÃ, Guillermo
George Washington University
Phylogenomics of bonytongue fishes (Osteoglossomorpha) shed light on the
craniofacial evolution and biogeography of the weakly electric clade
(Mormyridae)
Dryad
dataset
2021
exon capture
ancestral state estimation
Freshwater Fish Diversity
FOS: Biological sciences
Phylogenomics
2021-06-08T00:00:00Z
2021-06-08T00:00:00Z
en
22142367 bytes
8
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Bonytongues (Osteoglossomorpha) constitute an ancient clade of teleost
fishes distributed in freshwater habitats throughout the world. The group
includes well-known species such as arowanas, featherbacks, pirarucus, and
the weakly electric fishes in the family Mormyridae. Their disjunct
distribution, extreme morphologies, and electrosensory capabilities
(Notopteridae and Mormyroidea) have attracted interest by many, yet a
comprehensive phylogenetic framework for comparative analysis is missing.
We provide a phylogenomic analysis of 179 species (out of 260), 28 out of
29 genera, and all six families of extant bonytongues and find that the
interfamilial relationships support previous molecular phylogenies.
However, we find pervasive misalignment between the phylogeny and mormyrid
taxonomy. Based on a recent reassessment of the fossil record of this
group, we inferred dates of divergence among trans-continental clades and
the major groups. The estimated ages of divergence for the major clades
(e.g., Osteoglossomorpha, Osteoglossiformes, Mormyroidea) are older than
previous reports, but most of the divergences of clades on separate
continents are too young to be explained by biogeographic vicariance
hypotheses. Ancestral state estimations of craniofacial phenotypes reveal
pervasive convergence which may have contributed to taxonomic confusion.
Biogeographic analysis of the Pan-African distribution of mormyrids
indicates that their high species diversity in the Congo Basin is a
consequence of range reductions of widespread ancestors. Finally, our
results show that the highest diversity of craniofacial morphologies among
mormyrids originated in the Congo Basin, suggesting niche partitioning of
morphological and electrosensory adaptations of this uniquely diverse
clade.