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This hissing sound is caused by air being expelled through these pores, and can be heard up to 12 feet away.
The hissing sound is produced by males courting or battling for territory, and also gently by a female becoming receptive to a mate.
However, evidence of ancient origins is mounting from arthropod groups.
Using phylogenetic ‘tip-dating’ analysis with fossils, we show that a whirligig beetle species, Heterogyrus milloti, inhabiting forest streams in southeastern Madagascar is the last survivor of a once dominant and widespread Mesozoic group.
With a Late Triassic to Early Jurassic origin (226–187 Ma) it is the hitherto oldest dated endemic lineage of animal or plant on Madagascar.