A recent extensive study analyzing genomes from all 21 modern bat families and comparing them to numerous fossil bats has reportedly resolved the origin and characteristics of early bats. According to a study published in the journal Nature, the earliest bats likely emerged in Europe approximately 65 million years ago. Previous debates among scientists about potential origins in Asia, Africa, or North America were addressed, with the study’s senior author Sonja Vernes noting the challenges due to sparse fossil evidence.
Vernes, a professor at the University of St. Andrews in Scotland, explained that bats, being capable of flight, have been dispersing globally for millions of years. The research team sequenced genomes from 103 bat species, conducted trait and gene analyses, and utilized advanced computational methods to reveal that ancient bats had 26 chromosomes and evolved shortly after the extinction of dinosaurs.
Echolocation emerged early in bat evolution, as evidenced by a fossil bat named Vielasia, which lived 50 million years ago and displayed bone structures indicating echolocation abilities. Today, there are approximately 1,500 bat species worldwide, constituting a significant portion of mammalian diversity, and the study’s family tree illuminates the interrelationships among the 21 bat families.
The public availability of the data offers exciting possibilities for understanding bat longevity and disease resistance, with potential implications for human health. Researchers have long marveled at bats’ extended lifespans and resilience to viral diseases, prompting investigations into their genetic secrets for potential healthcare applications.
Vernes remarked on the unique characteristics of bats, highlighting their vocal communication learning process and the significance of their genomes for unraveling their exceptional traits. The collaborative effort involved 600 researchers worldwide, including Canadian participants like Burton Lim from the Royal Ontario Museum, who contributed valuable bat samples for the study.
Lim’s expertise in bat species collection and preservation underscored the importance of genetic data for conservation and research purposes. Bats’ vital ecological roles, from pollination to pest control, emphasize the necessity of understanding their genetics for conservation efforts. The study’s comprehensive genomic dataset is expected to catalyze further research into echolocation and other distinctive bat features, offering insights into their evolutionary history.