The karyotypes ofGigantiops destructor(Fabricius) and other ants from French Guiana (Formicidae)

Abstract

Abstract. The aim of this study, which was conducted in French Guiana, was to characterize the karyotypes of nine ant species belonging to the genera Anochetus, Apterostigma, Cyphomyrmex, Camponotus, Gigantiops, Myrmicocrypta, Odontomachus and Pseudomyrmex, and to compare them with published data. We present the fi rst descriptions of the karyotypes of Gigantiops destructor (Fabricius), an endemic Formicinae of the Amazonian region, which is the only living species in the tribe Gigantiopini, and of a species from the poorly-known cryptic genus Myrmicocrypta, which belongs to the Myrmicinae tribe Attini. Résumé. Le caryotype de Gigantops destructor (Fabricius) et d'autres fourmis de Guyane Française (Formicidae

Cytogenetic and Molecular Analyses Reveal a Divergence between Acromyrmex striatus (Roger, 1863) and Other Congeneric Species: Taxonomic Implications

“…However, all of the A. striatus colonies analyzed in this study had a chromosome number of 2n = 22. This result indicates that there is karyotypic variability in the Acromyrmex genus, which was previously considered to have a constant or homogenous chromosome number [15], [20].…”

“…have a diploid number of 38 chromosomes, with the exception of the social parasite A. ameliae with 2n = 36 [18]–[20]. However, all of the A. striatus colonies analyzed in this study had a chromosome number of 2n = 22.…”

“…The majority of these studies simply report the chromosome number and the karyotype morphology, and all report a chromosomal complement of 2n = 22 for Atta species and 2n = 38 for Acromyrmex species. The only known exception is A. ameliae with 2n = 36 chromosomes [18]–[20]. Thus, Atta and Acromyrmex are considered to have a constant chromosome number and a homogeneous karyotype [15], [19], [20].…”

“…The only known exception is A. ameliae with 2n = 36 chromosomes [18]–[20]. Thus, Atta and Acromyrmex are considered to have a constant chromosome number and a homogeneous karyotype [15], [19], [20].…”

Cytogenetic Studies on Workers of the Neotropical AntWasmannia auropunctata(Roger 1863) (Hymenoptera: Formicidae: Myrmicinae)

“…However, according to Delabie & Mariano (2005), the amount of information about the chromosome structure in the Formicidae remains small when compared to the number of species described (up to 12,000). Th e studies about ants from Neotropics are still incipient (see, for example, Mariano et al 2001Mariano et al , 2011 and there is no cytogenetic study in the tribe Blepharidattini Wheeler & Wheeler 1991 (sensu Bolton 2003), which includes both the genera Blepharidatta Wheeler 1915 and Wasmannia Forel 1893. Th e Attini Forel 1892 are considered as being the Blepharidattini sister-group (Schultz & Meier 1995;Diniz et al 1998) and cytogenetic investigations in this tribe concern around two dozen species in different genera (Barros et al 2010;Lorite & Palomeque 2010).…”