ISSN:
1573-6857
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract We report here the first chromosome numbers for sea-skaters. Meiotic metaphase figures were obtained from the testes of three littoral species: Asclepios shiranui, Halobates flaviventris and H. robustus and two pelagic species: H. germanus and H. micans. In the four species of Halobates 2nd♂=31, the highest chromosome number so far determined for the Gerridae. In a proposed ancestral form, A. shiranui, 2n♂=23. Males of all five species have an unpaired chromosome, assumed to be the X chromosome of an XO sex chromosome system.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00123725
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