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Relative variation of somatic and genital characters in grammostola mollicoma araneae theraphosidae



Relative variation of somatic and genital characters in grammostola mollicoma araneae theraphosidae



Journal of Arachnology 17(3): 263-274



A quantitative analysis of somatic and genital characters on a sample of Grammostola mollicoma (Ausserer, 1875) showed higher intraspecific variation in genitalic than somatic characters, especially in females. Experimental copulation within a subsample confirmed that all were the same species. These results seem to be uncommon in spiders and may result from: i) female moulting after maturity ecdysis; ii) allometric growth of spermathecae; iii) multiple sexual selection by female choice (according to female size) and its effects on male genitalic evolution.

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Accession: 007742059

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