Luisanthrena ruzae Ramos & Melo, 2021

Ramos, Kelli S. & Melo, Gabriel A. R., 2021, Three new genera of Protandrenini bees from South America (Hymenoptera, Apidae, Andreninae), Revista Brasileira de Entomologia (e 20210096) 65 (4), pp. 1-10 : 5-6

Luisanthrena ruzae Ramos & Melo , new species

( Figs. 2-3 )

urn:lsid:zoobank.org:act:5FC1B743-AC9A-442A-A627-5302285A9508

Diagnosis and comments. The new species can be is easily separated of L. vargasllosai n. comb. by the weak metallic green reflections mainly on head and mesosoma, yellow markings on male restricted to a smaller area on clypeus and basal portion of tibia, facial foveae of female very narrow, labral plate of female with straight distal margin; female basal area of metapostnotum without striation (only with mid longitudinal carina), pilosity of head and mesosoma denser and longer, metasoma of male parallel-side, and T7 of male with distal margin emarginated ( Fig. 3A ).

Description. Holotype female. Approximate body length: 5 mm; maximum head width: 1.24 mm; intertegular distance: 0.95 mm; forewing length: 3.75 mm; maximum width of T2: 1.2 mm. Coloration. Integument mostly dark brown with weakly green metallic reflexes, mainly on head and mesosoma; posterior surfaces of F2–F10 yellowish; mid and hind legs, pterostigma and wing veins, spurs, T1-T3 and marginal zone of the metasomal terga, brown; basal spot of fore and mid tibia yellow. Tegula semi-translucent brownish.Pubescence. Predominantly whitish, sparse and finely branched, with prepygidial and pygidial fimbria dark brown. Labrum with very sparse and simple setae, except for glabrous labral plate; long on lateral portions of clypeus (ca. 1.2x as long as ocellar diameter); eyes glabrous; on clypeus very sparse and short (ca. 0.5x as long as ocellar diameter); on lower paraocular area dense, decumbent, plumose and short (ca. 1x as long as ocellar diameter); scape with longer erect setae (ca. 1.5x as long as ocellar diameter); on vertex erect and short (about one ocellus diameter); gena with longer and erect setae (about twice ocellus diameter). Pronotal collar with dense and very short erect plumose hairs; mesoscutum with sparse and short hairs; mesoscutum with tiny hairs intermixed by longer pilosity (ca 2x OD); dorsolateral portion of metepisternum with few short decumbent hairs; on lower half of lateral mesepisternum erect and longer (ca 2x OD); scutellum and metanotum with sparse long hairs; basal area of metapostnotum glabrous; propodeum with long and erect plumose hairs; hind tibial scopa loose, setae long and simple, those on anterior surface about 1.5x as long as maximum width of tibia; basitibial plate with coarse setae on basal two-thirds. Disc of T1–T4 with very sparse minutely semidecumbent setae and longer branched erect hairs on lateral portions; marginal zone glabrous; fimbria of T5–T6 with dense plumose hairs; S1–S5 with sparse erect finely branched hairs. Integumental surface. Predominantly with fine punctures; strongly reticulated on head and mesosoma, reticulation weaker on mesosoma. Labral plate smooth and shiny; punctures dense (<3 pd) on frons, paraocular area, vertex, gena, mesoscutum, scutellum, and metanotum; clypeus and supraclypeal area with very sparse shallow punctures (> 4 pd) and finely reticulate; facial fovea smooth and shiny; ventral portion of gena almost unpunctured and strongly reticulate; tegula finely reticulate on anterior half and smooth on posterior half; basal portion of metaposnotum with only a mid-longitudinal carina and unpunctured on remaining areas; T1-T5 reticulated and with inconspicuous punctures, including reticulated marginal zone; metasomal sterna weakly reticulated, shiny among punctures; pygidial plate reticulated with evident longitudinal carina. Structure. Head as wide as long (width: 1.24; length: 1.26); first labial palpomere flattened, as long as length of the three distal palpomeres combined; labral plate 1.1x as long as wide (length: 0.25; width: 0.23); compound eye 2.1x longer than wide (length: 0.83; width: 0.4), inner orbits slightly convergent below (upper and lower interorbital distance: 0.83 and 0.71); clypeus 1.5x wider than long (width: 0.6; length: 0.4); subantennal sutures subparallel; F1 longer than F2; frontal line slightly marked as carina; gena, in lateral view, narrower than compound eye; mid tibial spurs toothed, as long as basitarsus; hind tibial spurs finely serrate, slightly curved apically, and subequal in length; tarsal claws bifid, teeth subequal; lateral foveae of T2 well-marked and ellipsoid; marginal zone slightly depressed in comparison to disc; pygidial plate V-shaped, with apex slightly rounded.

Paratype male. Approximate body length: 4.05 mm; maximum head width: 1.14 mm; intertegular distance: 0.74 mm; forewing length: 3.5 mm; maximum width of T2: 0.9 mm. Agreeing with female, except for yellow on most of clypeus (inverted T marking), basal third of tibia, small spot on basal portion of mid tibia, and basitibial plate; hind basitarsus yellowish. Head as wide as long (width: 1.14; length: 1.07); labral plate as long as wide (length: 0.25; width: 0.23); compound eye 1.7x longer than wide (length: 0.7; width: 0.4), inner orbits slightly convergent below (upper and lower interorbital distance:0.8 and 0.54); clypeus 1.6x wider than long (width: 0.5; length: 0.3); F1 longer than F2; subantennal sutures subparallel; frontal line slightly marked as carina; gena, in lateral view, narrower than compound eye; mid tibial spurs finely serrate, as long as basitarsus; hind tibial spurs finely serrate, slightly curved apically, subequal in length; tarsal claws bifid, inner teeth reduced; metasoma parallel-side; lateral foveae of T2 well-marked and ellipsoid; marginal zone slightly depressed in comparison to disc; T7 with distal margin emarginated ( Fig. 3A ); S6 slightly emarginated on middle portion of distal margin ( Fig. 3B ).

Flower record. Taraxacum sp. ( Asteraceae ).

Distribution. The new species is reported in Ecuador at elevations around 2500 m.

Material examined. Holotype female ( DZUP), “ EQUADOR \ Oriente – Ambato \ 2600m \ October 1956 ” . Paratypes. Ecuador, Carchi : 1 male ( MNHP) “El Angel\ 1.1.32”. Pichincha : 1 male ( MNHP) “Route de\ Calderon\ 10.x.30” ; 1 female and 2 males ( MNHP) “Puembo\ 20.ii.31” ; 2 females ( MNHP) “Quito\ 21.ii.30\ Taraxacum ” ; 1 male ( MNHP) “Quito\ 25.2.30” ; 2 females ( MNHP) “Quito\ 28.ii.30” ; 1 female ( MNHP) “Quito\ iii.30” ; 1 male ( MNHP) “Quito\ Juin ” ; 1 female ( MNHP) “Quito\ 7.vi.31” ; 1 male ( MNHP) “Quito\ vi.30” ; 2 females ( MNHP) “Quito\ x.31” ; 3 females and 1 males ( MNHP) “Quito\ 23.xi.30” ; 2 females and 4 males ( DZUP, MNHP) “Rumipamba\ 22.iii.31” ; 5 females and 2 males ( DZUP, MNHP) “ Sambiza ” .

Etymology. The specific epithet also honors Dr. Luisa Ruz.

Figures

Figure 2 Luisanthrena ruzae Ramos & Melo new species, paratypes. A, head of female in frontal view. B, female in dorsal view. C, head of male in frontal view. D, male in lateral view.Scale bar: 0.5 mm.

Figure 3 Luisanthrena ruzae Ramos & Melo new species, male paratype. A, T7 in postero-dorsal view.B, S6 in ventral view.C, S7 in ventral view. D, S8 in ventral view.e, genitalia in ventral view. f, genitalia in dorsal view.Scale bar 0.2 mm.