Comparative biology of four Rhodanthidium species (Hymenoptera, Megachilidae) that nest in snail shells Author Hostinska, Lucie https://orcid.org/0000-0002-6685-2690 Department of Biology, Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, CZ- 500 03 Hradec Kralove, Czech Republic lucie.hostinska@uhk.cz Author Kunes, Petr Department of Botany, Faculty of Science, Charles University, Benatska 433 / 2, CZ- 128 01 Praha 2, Czech Republic Author Hadrava, Jiri Department of Botany, Faculty of Science, Charles University, Benatska 433 / 2, CZ- 128 01 Praha 2, Czech Republic & Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branisovska 1160 / 31, CZ- 370 05, Ceske Budejovice, Czech Republic Author Bosch, Jordi Department of Zoology, Faculty of Science, Charles University, Vinicna 7, CZ- 128 44 Praha 2, Czech Republic Author Scaramozzino, Pier Luigi CREAF - Ecological and Forestry Application Research Centre, Edifici C Campus de Bellaterra, 08193, Barcelona, Spain Author Bogusch, Petr https://orcid.org/0000-0002-4554-6141 Department of Biology, Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, CZ- 500 03 Hradec Kralove, Czech Republic text Journal of Hymenoptera Research 2021 2021-08-31 85 11 28 http://dx.doi.org/10.3897/jhr.85.66544 journal article http://dx.doi.org/10.3897/jhr.85.66544 1314-2607-85-11 53AD3706AEA64645A3C7B6A9D53C8525 A4D667B4D2E75578AF2AA3760891FFCE 5491613 Rhodanthidium infuscatum Material examined. Four nests from Spain . We found one nest in the city park in Castelldefels ( Spain ). The snail shell was found in a stone wall, and there were two cocoons, with hatched bees and partitioning in the nest. The structure of the nest was similar to that of the nest of R. septemdentatum but did not contain filling in the first empty cell. The other three records were collected in Spain by P. L. Scaramozzino. Two nests contained two individuals, and the third nest contained four individuals (mean 2.5 +/- 0.5 SD). Nest structure. The nests contained 2-4 brood cells and one vestibular cell. Both the brood cells and the vestibular cells were delimited by resin partitions (Fig. 2H ). The vestibular cell was not filled with debris. The closing plug was made of resin mixed with small sand particles. Overall, we obtained 8 adult bees, 6 males and 2 females. Shell choice. The nest found in Castelldefels was built in an Iberellus sp. shell and nests from Llanca (Girona) in E. vermiculata shells. Nest associates. No nest associates were recorded for this species.