{"id":117412,"date":"2019-04-03T23:15:15","date_gmt":"2019-04-03T23:15:15","guid":{"rendered":"https:\/\/www.bnreport.com\/tiny-pumpkin-toadlets-have-glowing-bony-plates-on-their-backs\/"},"modified":"2019-04-03T23:15:15","modified_gmt":"2019-04-03T23:15:15","slug":"tiny-pumpkin-toadlets-have-glowing-bony-plates-on-their-backs","status":"publish","type":"post","link":"https:\/\/www.bnreport.com\/en\/tiny-pumpkin-toadlets-have-glowing-bony-plates-on-their-backs\/","title":{"rendered":"Tiny pumpkin toadlets have glowing bony plates on their backs"},"content":{"rendered":"

When a group of biologists realized that pumpkin toadlets had no middle ear bone, the team was stumped. That meant that these tiny, toxic frogs couldnt hear each others high-pitched chirps, which is how most frogs attract mates. <\/p>\n

\u201cWe scratched our heads about how they could communicate by other means,\u201d says Sandra Goutte, an evolutionary biologist at New York University Abu Dhabi in the United Arab Emirates. <\/p>\n

Suspecting that the frogs use a less obvious form of communication, similar to parrots attracting mates with feathers that emanate ultraviolet light<\/a> (SN:1\/19\/02, p. 40), the researchers aimed a UV lamp at the frogs neon orange skin and saw a pattern glowing in blue. <\/p>\n

\u201cI couldnt stop smiling for the whole day\u201d after discovering that the frogs had glowing bony plates just beneath the skin<\/a> on their heads and backs, Goutte says. <\/p>\n

The finding, reported online March 29 in Scientific Reports, marks the first known case of an amphibian showing bone fluorescence. Among terrestrial vertebrates, only chameleons have been found with this trait. <\/p>\n

Skeletal and tissue comparisons of two toadlet species \u2014 Brachycephalus ephippium and B. pitanga \u2014 with a third frog relative revealed that the plates were skin that had turned to bone. All bone fluoresces under UV light, but usually layers of skin, muscle and fat block that light from getting out. The skin covering the frogs plates, however, is thin enough for the light to be seen, and it lacks pigmented cells called melanophores that help block UV light from getting through skin. <\/p>\n

These traits may allow the frogs to communicate with fluorescence, possibly for luring potential mates or warning would-be predators, the researchers suggest. <\/p>\n

The frogs eyes would have to be extremely sensitive to pick up such cues. The plates wouldnt glow brightly in the fRead More \u2013 Source<\/strong><\/a><\/p>\n

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science news<\/a><\/h5>\n

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