Abstract

The number of chromosomes of the funnel-web spider Agelena limbata is reported to be 2n=42 (40+X1X2) in males and 44 (40+X1X1X2X2) in females based on the observation of three populations from western Honshu, Japan. These numbers do not conform to those reported by SUZUKI (1954) where the diploid number in male was interpreted as 44 (42+X1X2). The disharmony in chromosome number between the two results may be attributable to the possible miscounting in SUZUKI's observation. Unlike previous reports on chromosomes of Agelena and most of other genera of spiders, A. limbata was shown to have some pairs of meta- or submetacentrics in its karyotype.

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