Rivuline Karyotypes and their Evolution (Rivulinae, Cyprinodontidae, Pisces)

Karyotypic Heterogeneity in South American Annual Killifishes of the Genu Cynolebias (Pisces, Cyprinodontiformes Rivulidae).

“…Previous studies demonstrated that alternating centric fusions and pericentric inversions cause the reduction of chromosome number and the appearance of very large acrocentric and metacen tric chromosomes in those species and populations inhabiting the Atlantic Litoral zone. This conclusion was in agreement with Scheel's (1972) hypothesis on chromosomal evolution in the Rivulinae.…”

“…When this type of rearrange ment occurs, the diploid number is maintained despite the variation in fundamental number. These events were observed in different groups, particularly in Cyprinodontiformes such as Aphyosemion (Scheel 1972) and Fundulus (Chen and Ruddle 1970). The latter exhibit patterns of chromosomal changes similar to those described here.…”

Analysis of Karyotypic Evolution in Natural Populations of Cynolebias(Pisces: Cyprinodontiformes, Rivulidae) Using Banding Techniques.

“…3b, pairs 1, 2). Both types of rearrangements occurring in alternation would finally originate large biarmed chromosomes like those proposed by Scheel (1972) with the three types of C-bands. This last situation was observed in C. prognatus (Fig.…”

“…?_ have ocurred in the karyotypic reorganization of this group, just like those postulated _? ?_ Scheel (1972) for all the Rivulinae.…”

Chromosome Studies of Two Species of the Genus Coreoperca (Pisces: Perciformes), with Reference to the Karyotypic Differentiation and Evolution

“…The karyotypic feature of Cyprinodontif ormes (Campos et al 1971;Chen 1971;Scheel 1972;etc. ) According to Greenwood et al (1966), the systematic groups as mentioned above are included in Division III (Euteleostei; according to Greenwood et al 1967), on the basis of their classification system.…”