Rediviva, Friese, 1911

Kuhlmann, Michael, Jürgensen, Lea-Sophie & Michez, Denis, 2020, Subgeneric classification of the bee genus Rediviva Friese (Hymenoptera: Apiformes: Melittidae), Zootaxa 4790 (2), pp. 318-328 : 326

Rediviva (s. str.) Friese 1911

Andrena (Rediviva) Friese, 1911: 671 . Type species: Andrena peringueyi Friese 1911 , by designation of Cockerell, 1931: 402 (transferred to Rediviva ).

Notomelitta Cockerell, 1933: 128 . Type species: Rediviva neliana Cockerell 1931 , by original designation, monobasic.

The 18 species placed in this subgenus (clades B–E of Kahnt et al. 2017) are listed in table 1.

Diagnosis. This is the most speciose subgenus comprising 18 species (Table 1); R. transkeiana likely belongs here, too.

Males combine the following characters: S7 with usually large strigate translucent lateral lobes (lateral lobes either missing or smooth in other subgenera); median lobes long and narrow lanceolate to spatulate with pilosity mostly restricted to the apical third, longest hairs about half as long as length of median lobe ( Figs 4 e–f) (in other subgenera median lobes much shorter, of different form and hairs shorter). In R. emdeorum and R. aurata median lobes are shorter ( Whitehead & Steiner 2001: Figs 25B–C) and both have a vestigial pygidial plate ( Whitehead & Steiner 2001: Fig. 44F) that is absent in all other species. Males of R. macgregori are divergent in that the median lobes are relatively short and completely covered with hair ( Fig. 4d ).

Females can be identified by a combination of the following character states: broadened hind tibia and basitarsus with the scopa consisting of densely plumose pubescence for transporting floral oil ( Fig. 3f ) (in Redivivoides hind tibia not broadened and without plumose pubescence), bidentate mandible (tridentate in Gigaviva ) and inconspicuous yellowish apical tergal hair bands ( Fig. 3b ) (distinctly white in Albiviva ) in combination with the absence of a scale-like projection on the distal-dorsal angle of the hind basitarsus (present in Albiviva and three species of Deriviva ; R. intermedia , R. intermixta and R. rufipes ). This set of characters also applies to females of two species in the subgenus Deriviva , namely R. colorata and R. saetigera , that cannot be distinguished from those of Rediviva s. str.. They can only be assigned to a subgenus through the associated male.

Distribution. Species of Rediviva (s. str.) occur throughout the range of the genus ( Whitehead & Steiner 2001, Whitehead et al. 2008).

Figures

FIGURE 3. Rediviva (Albiviva) albifasciata Whitehead & Steiner ♀: a. metasoma with distinct white apical hair bands. R. (s. str.) whiteheadi Kuhlmann ♀: b. metasoma with indistinct yellowish apical hair bands. R. (Redivivoides) capensis (Kuhlmann) ♀: c. hind leg. R. (Deriviva) intermedia Whitehead & Steiner ♀: d. front leg, coxa with apical hairy spine (s). R. (Deriviva) intermixta Cockerell ♀: e. hind basitarsus with shiny scale-like projection; f. hind leg.

FIGURE 4. Rediviva (Albiviva) albifasciata Whitehead & Steiner ♂: a. metasomal sternum 8, apical plate; b. metasomal ster- num 7, dorsal view. R. (s. str.) macgregori Whitehead & Steiner ♂: c. metasomal sternum 8, apical plate; d. metasomal sternum 7, dorsal view. R. (s. str.) longimanus Michener ♂: e. metasomal sternum 7, dorsal view (ll: lateral lobe; ml: median lobe); f. metasomal sternum 7, lateral view.