Combining phylogenomics and phenotypes (Coleoptera: Tenebrionidae: Amphidorini)
Presentation for Entomology 2018, Monday November 12, 2018
Abstract:
The desert stink beetles of the tribe Amphidorini LeConte are a diverse North-American lineage of darkling beetles in the family Tenebrionidae with over 200 valid species. We present a comprehensive phylogeny of the tribe inferred from both a 7-gene analysis for over 180 terminals and a phylogenomic analysis generated from 29 de novo transcriptomes. The phylogenetic analyses are paired with morphological and biogeographic data to understand the evolutionary history of the tribe which is presented in three parts: (1) an updated genus-level classification increasing the recognized genera from 6 to 14, (2) a summary of inferred life history strategies and putative phenotypic adaptations, and (3) a speculative account of the origins and areas of diversification for the constituent lineages.
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Insights into the evolution of the desert stink beetles
1. Insights into the evolution of the desert stink beetles:
Combining phylogenemics and phenotypes
(Coleoptera: Tenebrionidae: Amphidorini)
M. Andrew Johnston, Kojun Kanda, Aaron D. Smith
@MAndrewJohnston
2. Desert Stink Beetles
Tribe Amphidorini LeConte, 1862
• “Desert Stink Beetles” or “false wireworms”
• 253 valid species/subspecies in North America
• >400 available names (described species)
Eleodimorpha bolcan Blaisdell, 1909
Eleodes armata LeConte, 1851
10. Species-tree analyses in ASTRAL-II
• 4 monophyletic groups found consistently
Phylotranscriptomic Analysis
11. Species-tree analyses in ASTRAL-II
• 4 monophyletic groups found consistently
• Relationships between clades less clear
?
Phylotranscriptomic Analysis
12. Amphidora-clade sister to all others
Found in more conservative
FO-aa and SISRS-1k datasets
Phylotranscriptomic Analysis
13. Eleodes-clade sister to all others
FO-nt SISRS-loci
Combined-nt
Phylotranscriptomic Analysis
21. Revised state of Amphidorini
• 16 genera and 9 subgenera
Torugena Globostyla Exarenula
3 new genera
22. Revised state of Amphidorini
• 16 genera and 9 subgenera
• 11 genus-group changes
23. Revised state of Amphidorini
• 16 genera and 9 subgenera
• 11 genus-group changes
• 113 species-group changes
24. Why so many similar species?
Sympatric species assemblages from Arizona
5 species from mid-elevation
25. Why so many similar species?
Sympatric species assemblages from Arizona
5 species from mid-elevation
Smith et al. 2014, Fig. 2
Müllerian mimicry complex
31. Why so many similar species?
Generalist scavengers
32. Why so many similar species?
Generalist scavengers Minimal genitalic differences
33. Why so many similar species?
Extensive distributional overlap
>200 taxa, 20,000 specimens (OSUC,MAJC)
34. Why so many similar species?
Extensive distributional overlap Centers of diversity
Pacific coast
Intermountain region
Northern Mexico
Intermountain region?
>200 taxa, 20,000 specimens (OSUC,MAJC)
35. Why so many similar species?
Apparently mountain uplift and
glaciation drove Amphidorini
diversification
Supported by Trogloderus
Pleistocene diversification
38. When did Amphidorini originate?
Smith et al. 2006 https://doi.org/10.1073/pnas.0511296103
Sister to Eurasian Blaptini Leach, 1815
• Blaptini ~55my old
• Corresponds to mammal
diversification across land bridges
42. Thank you!
Funding:
National Science Foundation
(DEB–1258154, DEB–1754731)
Visiting Scientist Fellowship
CanaColl foundation
Collaborators:
Nico Franz
Rolf Aalbu
Rebecca Livingston
Omron Blau
Sydney Wuerker
Travis Hitchner
Lab members:
Sangmi Lee Brian Reily
Andrew Jansen Kathy Arguez
Sal Anzaldo Ed Gilbert