Complex sentence: His first specialty was entomology, but he was also dedicated to paleontology and the study of vertebrates.Amongst fis many other achievemants he described "Cactoblastis cactorum" the cactus moth.
Split into simpler sentences: His first specialty was entomology, but he was also dedicated to paleontology and the study of vertebrates. Amongst his many other achievements, he described "Cactoblastis cactorum", the cactus moth.