Rediviva (Albiviva), 2020

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 : 322

Rediviva (Albiviva) subgen. nov.

Type species: Rediviva (Albiviva) albifasciata Whitehead & Steiner 1994 , designated here.

The only species in this subgenus is R. albifasciata .

Diagnosis. The subgenus is monotypic and just contains R. albifasciata which is the smallest species of the genus (8–10 mm). Males can be recognized by a combination of the following characters: median lobes of S7 spatulate ( Fig. 4b ) (not apically broadened in other subgenera); lateral lobes large and smooth, papillate on basal third (in Gigaviva lateral lobes missing; not papillate in other subgenera); apical plate of S8 distally straight ( Fig. 4a ) (apical margin deeply cleft in Gigaviva ; apically notched, emarginate or semi-circular in other subgenera).

Females show a unique combination of a broadened hind tibia and basitarsus with the scopa consisting of densely plumose pubescence ( Fig. 3f ) (in Redivivoides hind tibia not broadened and without plumose pubescence), bidentate mandible (tridentate in Gigaviva ) and small shiny scale-like projection on the distal-dorsal angle of the hind basitarsus (smaller than in Fig. 3e ) (projection distinctly larger in R. intermedia , R. intermixta and R. rufipes of subgenus Deriviva , missing in all other species) in combination with the small size and distinct white apical tergal hair bands ( Fig. 3a ) (less conspicuous yellowish or missing in all other subgenera) that only occur in this species. This is the only Rediviva species that collects oil in flowers of Colpias mollis (Scrophulariaceae) ( Steiner & Whitehead 2002, Kuhlmann & Hollens 2015).

Etymology. The new subgeneric name is a combination of the first part of the specific epithet of the type species R. albifasciata and the last part of the generic name Rediviva . The gender of the name is feminine.

Distribution. The species is only known from the western part of the winter rainfall region ( Whitehead & Steiner 2001).

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.