5 documents found, page 1 of 1
Evidence for the evolution of eusociality in stem ants and a systematic revisio...
Boudinot, Brendon E; Richter, Adrian; Katzke, Julian; Chaul, Júlio C M; Keller, Roberto A; Economo, Evan P; Beutel, Rolf Georg; Yamamoto, ShûheiIt is generally assumed that Cretaceous stem ants were obligately eusocial, because of the presence of wingless adult females, yet the available evidence is ambiguous. Here, we report the syninclusion of a pupa and adult of a stem ant species from Mid-Cretaceous amber. As brood are immobile, the pupa was likely to have been transported by an adult. Therefore, the fossil substantiates the hypothesis that wingles...
The evolution of Zoraptera
Matsumura, Yoko; Beutel, Rolf Georg; Rafael, José Albertino; Yao, Izumi; Câmara, Josenir Teixeira; Lima, Sheila P.; Yoshizawa, KazunoriZoraptera is one of the most enigmatic and least understood orders in insects. Based on a wide taxon sampling from all continents where the group is known, we applied a phylogenetic approach using multiple DNA sequences to elucidate species-level relationships. The resulting phylogeny shows that Zoraptera is divided into three major clades, and that two comprise species distributed on different continents. The ...
Distal leg structures of the Aculeata (Hymenoptera): A comparative evolutionary...
Beutel, Rolf Georg; Richter, Adrian; Keller, Roberto A.; Hita Garcia, Francisco; Matsumura, Yoko; Economo, Evan P.; Gorb, Stanislav N.The distal parts of the legs of Sceliphron caementarium (Sphecidae) and Formica rufa (Formicidae) are documented and discussed with respect to phylogenetic and functional aspects. The prolegs of Hymenoptera offer an array of evolutionary novelties, mainly linked with two functional syndromes, walking efficiently on different substrates and cleaning the body surface. The protibial-probasitarsomeral cleaning devi...
Comparative analysis of worker head anatomy of Formica and Brachyponera (Hymeno...
Richter, Adrian; Garcia, Francisco H.; Keller, Roberto A.; Billen, Johan; Economo, Evan P.; Beutel, Rolf GeorgAn organism’s morphology plays a crucial role in its interactions with its environment. Therefore, comparative anatomical analysis is a critical basis to understanding the ecology, behavior, and evolution. While our knowledge of ant internal anatomy has considerably improved in recent years, it is still highly fragmentary, and many evolutionary questions remain unsolved. The current work is a contribution of a ...
Cephalic anatomy and three-dimensional reconstruction of the head of Catops ven...
Beutel, Rolf Georg