Peptide mass fingerprints in combination with molecular phylogenetic analyses reveal genetic differentiation in Psectrascelis (Coleoptera, Tenebrionidae) from the Atacama

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Title:Main Title: Peptide mass fingerprints in combination with molecular phylogenetic analyses reveal genetic differentiation in Psectrascelis (Coleoptera, Tenebrionidae) from the Atacama
Description:Abstract: The evolution of life in extremely water limited environments, such as the Atacama Desert in northern Chile has been poorly studied. Within the CRC 1211 (Earth - Evolution at the Dry Limit), we focus on the evolutionary patterns of darkling beetles (Tenebrionidae). These beetles belong to the most conspicuous biotic components in arid ecosystems worldwide. Here we summarize results obtained on the hyperdiverse genus Psectrascelis Most species of Psectrascelis have a small area of distribution; particularly in the Atacama. Firstly, we analyzed by means of MALDI-TOF mass fingerprinting the structural diversity of neuropeptides in Psectrascelis. Selected tissue samples (antennal lobes) contained more than 50 neuropeptides detectable in a single spectrum; together these peptides contain at least 1000 amino acids. Isolated taxa naturally accumulate amino acid substitutions over time. Secondly, we analyzed the phylogenetic pattern using COI and 16S. Both approaches largely revealed congruent topologies. Analyses of COI provided the best phylogenetic signals at species level whereas high-throughput mass fingerprinting was useful to detect resolution at deeper nodes. Data suggest a very recent longitudinal colonization of P. intricaticollis along the eastern Andes mountain range bordering the Atacama. We speculate that the disjunct distribution of many related Psectrascelis species is the result of (1) repeated expansions as presumed for P. intricaticollis and (2) long-lasting interruptions of migration corridors. The identification of abiotic key conditions that resulted in today's diversity and patterns of endemism will be performed by sharing data with geologists working in the same transects.
Responsible Party
Creators:Julia Oly (Author), Alvaro Zúñiga-Reinoso (Author), Reinhard Predel (Author)
Publisher:CRC1211 Database (CRC1211DB)
Publication Year:2019
Topic
CRC1211 Topic:Biology
Related Subproject:B2
Subjects:Keywords: Biodiversity, Biogeography, Evolution
Geogr. Information Topic:Biota
File Details
Filename:OlyDZG18.pdf
Data Type:Image - Image
File Size:1.4 MB
Date:Created: 13.08.2019
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:In Process
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Download Permission:Only Project Members
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Licence:None
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Specific Information - Presentation
Presenter:Julia Oly
Presentation Date:9th of September, 2018
Presentation Type:Poster
Event:111th Annual Meeting of the German Zoological Society
Event Type:Conference
Event Location:Greifswald, Germany
Event Duration:9th of September, 2018 - 13th of September, 2018
Metadata Details
Metadata Creator:Alvaro Zúñiga
Metadata Created:13.08.2019
Metadata Last Updated:13.08.2019
Subproject:B2
Funding Phase:1
Metadata Language:English
Metadata Version:V50
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