Osmia (Hemiosmia). 1: Female of O. balearica on Lotus creticus (Fabaceae; photo V. Haeseler). 2: Female of O. uncicornis digging out nest burrow in loose soil (photo V. Haeseler). 3: Excavated brood cells of O. uncicornis. 4: Copulating pair of O. balearica (photo V. Haeseler). 5-7: Male terga 5-6 of O. uncicornis (5), O. argyropyga (6) and O. difficilis (7).

Contexts in source publication

Context 1

... median tooth on the lower inner margin of the mandible in combination with a strongly carinate trochanter of the fore leg. The metasomal scopa is either foxy red, yellowish-red or whitish. Unifying characters of the males are two lateral teeth and one or two median teeth at the apical margin of tergum 6 rendering tergum 6 three-or four-toothed ( Fig. 5-7), and a rather small tergum 7, which is hidden under tergum 6. As in most males of Osmia, sternum 2 is more or less enlarged, sternum 3 is medially both emarginate and fringed and sternum 6 lacks membraneous basal flaps. The male of Osmia spinicoxa spec. nov. differs from the males of the other O. (Hemiosmia) species in that tergum 6 ...

Context 2

... species of the O. difficilis species group differ from those of the O. uncicornis species group in both sexes by the whitish tergal pilosity, in the female sex by the clubbed hairs on the fore tarsus and in the male sex by the normal shape of antennal flagellum, midleg and sterna, the trifid tergum 6 with strong median projection ( Fig. 7), the evenly rounded apical margin of tergum 7, the lack of hooked or curved bristles on sterna 4 and 6 and the spatulate apex of the ...

Context 3

... biology. O. avosetta nests in excavated, 3-7 cm deep burrows in rather loose, sandy to gravelly ground usually containing one vertically oriented brood cell at the end of the burrow, rarely two cells immediately beside each other ( Fig. 17; Rozen et al. 2010). The cells, which range in depth from 1.5-5 cm and have a length of 15-17.5 mm and a diameter of 7-9 mm, are distinctly three-layered with a thin mud layer sandwiched between two layers of large petal pieces of Hedysarum, Onobrychis (both Fabaceae) or other plant taxa. Whether the short and 6-7 mm wide entrance burrow leading to the ...

Context 4

... biology. O. tergestensis nests in preexisting cavities, i.e. under or between stones, in holes and fissures of rocks and stones, in dense grass tussocks, occasionally also in hollow broken stems of Heracleum (Apiaceae) (Fig. 15, 17; Benoist 1931;Ferton 1897;Müller et al. 1997;Ivanov & Filatov 2008;Rozen et al. 2010). The nests contain one to five brood cells, which are constructed closely beside each other and completely hidden within the cavity. The cells, whose orientation varies from horizontal to nearly vertical and which are neither glued to the substrate ...

Context 5

... contain 1-3 brood cells separated by one-layered partitions of leaf pulp. They are closed by a barricade of densely packed small particles and a double wall of leaf pulp at the shell opening (Fig. 28, 29). Interestingly, the females seem to invariably select snail shells that are hidden in cavities under prominences of rocks or under stones (Fig. 27). In contrast to snail shell nesting Osmia species of other subgenera (Müller et al. 2018), the females of O. andrenoides neither glue patches of leaf pulp onto the shell surface nor do they hide, bury or turn the nest shells after nest ...