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・ Nuporanga
・ Nuppeppō
・ Nupperibo
・ NUPR1
・ Nuprl
・ Nupserha
・ Nupserhoglenea cerrutii
・ Nupshamrane Peaks
・ Nupskammen Ridge
・ Nupskåpa Peak
・ Nupsskarvet Mountain
・ Nupsskåka Valley
・ Nuptial agreement
・ Nuptial flight
・ Nuptial gift
Nuptial pad
・ Nuptown
・ Nuptse
・ Nupur Asthana
・ Nupur Mehta
・ Nupur Sharma
・ NUPW
・ Nuq
・ Nuq District
・ Nuq, Bajestan
・ Nuq, Rashtkhvar
・ Nuqat al Khams
・ Nuqta
・ Nuqtavi
・ Nuqul Group


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Nuptial pad : ウィキペディア英語版
Nuptial pad

A nuptial pad (also known as thumb pad, or nuptial excrescence) is a secondary sex characteristic present on some mature male frogs and salamanders. Triggered by androgen hormones, this breeding gland (a type of mucus gland) appears as a spiked epithelial swelling on the forearm and prepollex that aids with grip, used primarily by males to grasp (or clasp) females during amplexus. They can also be used in male-male combat in some species.〔
==Historical background==

Austrian biologist Paul Kammerer experimented on midwife toads' nuptial pads. He used the offsprings' apparent enlargening from generation-to-generation as evidence of Lamarckian evolution.〔()〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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