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1. Endosymbiont-free ants: molecular biological evidence that neither Wolbachia, Cardinium or any other bacterial endosymbionts play a role in thelytokous parthenogenesis in the harvester ant species, Messor barbarus and M. capitatus (Hymenoptera: Formicidae)

Creator:
Martínez-Rodríguez, Paloma, Sarasa, Jonás, Peco, Gegona, Jauregui, Berta M., Rivera, Desiree, and Bella, Jose L.
Type:
article, články, model:article, and TEXT
Subject:
Zoologie, zoologie, entomologie, Wolbachia, Cardinium, Spiroplasma, endosymbionts, Formicidae, Messor, thelytokous parthenogenesis, 2, and 59
Language:
English
Description:
Thelytokous parthenogenesis is a type of sex determination in which females are produced from unfertilized eggs. Genetic and endosymbiont-induced forms of thelytoky have been described in the Hymenoptera. Our study has revealed that Wolbachia, Cardinium, Spiroplasma and other endosymbionts are probably absent in Iberian populations of harvester ants, Messor barbarus and Messor capitatus (Hymenoptera: Formicidae: Myrmicinae) and are thus not involved as factors in the sex determination of these two species. Our results lend weight to previous suggestions that bacterial parthenogenesis induction in Hymenoptera is probably limited to the reproductive systems of chalcidoid and cynipoid parasitoid wasps (Hymenoptera: Apocrita: Chalcidoidea and Cynipoidea, respectively)., Paloma Martínez-Rodríguez ... [et al.]., and Obsahuje seznam literatury
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. More than one species of Messor harvester ants (Hymenoptera: Formicidae) in Central Europe

Creator:
Schlick-Steiner, Birgit, Steiner, Florian M., Konrad, Heino, Markó, Bálint, Csösz, Sándor, Heller, Gerhard, ferencz, Beatrix, Sipos, Botond, Christian , Erhard, and Stauffer, Christian
Type:
article, model:article, and TEXT
Subject:
Formicidae, Messor, harvester ants, cryptic species, biodiversity, mitochondrial DNA, molecular taxonomy, phylogeny, and systematics
Language:
English
Description:
It is commonly held that Central Europe harbours but a single harvester ant species, namely Messor structor. Recently discovered bionomic differences between two Central European populations, which may reflect interspecific variation, cast doubt on this assumption. In the present study we test alternative hypotheses - one versus two harvester ant species in Central Europe and adjacent regions - by investigating the genetic diversity of ants determined as M. structor or close to it ("M. cf. structor"). Sequences of the mitochondrial COI gene revealed two major lineages of different but partially overlapping geographic distributions, both occurring in Central Europe. The existence of a cryptic species within M. cf. structor is the most plausible interpretation, since the sequence divergence between the two major lineages equals those between M. capitatus, M. concolor and M. bouvieri. The phylogenetic analyses revealed a distinct substructuring for both of the detected major lineages and the possible existence of additional cryptic species.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public