© Copyright source/photographer · 5 Tetraloniella paenalbata, f side Click on images or map to enlarge and for details. 80x5 - 240x3 - 240x4 - 320x1 - 320x2 - 320x3 - 640x1 - 640x2 Set display option above. Click on images to enlarge. © Copyright source/photographer · 5 Tetraloniella paenalbata, f back © Copyright source/photographer · 5 Tetraloniella paenalbata, f face © Copyright source/photographer · 5 Tetraloniella paenalbata, f rear

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Tetraloniella

Identification

Extracted from: Wallace E. LaBerge. 2001. Revision of the bees of the genus Tetraloniella in the New World (Hymenoptera: Apidae). Illinois Natural History Survey Bulletin 36(3):67-162. This small pale species from the southern prairies is similar to and perhaps closely related to albata (Cresson), as its name implies. Both sexes have the terga covered with closely decumbent, highly plumose, white pubescence. The female of paenalbata can be told from that of albata by the first tergum having the apical area largely impunctate and the lower surfaces of the flagellum orange. The male of paenalbata has a longer first flagellar segment and darker flagellar segments as described below. FEMALE. Measurements and Ratios.- N = 20; length, 10-12 mm; width, 3.5-4.5 mm; wing length, M = 2.54 0.087 mm; hooks in hamulus, M = 11.55 0.223; flagellar segment 1/2, M = 2.06 0.033. Integumental Color.- Black with exceptions as in albata but mandible usually rufescent in median half, flagellum usually yellow or orange below except segment 1 dark brown. Structure.- Head sculpture as in albata except vertex with flattened lateral area with punctures extremely minute, separated by 2 to 3 puncture widths or more, shiny. Maxillary palpal segments 6, ratio about as 1.0:1.0:1.0:0.5:0.3:0.3; galeae dulled by fine shagreening at tips or in apical half, shiny basally. Flagellar segment 2 about as long as broad or slightly shorter, about half as long as segment 1 and subequal to segment 3, segments 3-9 slightly longer than broad. Mesoscutum sculptured as in eriocarpi and albata but punctures small, posteromedian area punctures crowded, surface shiny, finely shagreened only peripherally. Scutellum similar; mesepisternum densely punctate, surface moderately shiny, finely shagreened. Metasomal tergum 1 sculptured as in albata but apical area largely impunctate, punctures restricted to narrow basal area and more broadly at extreme sides, surface dulled by fine shagreening. Terga 2-4 similar but basal area punctures more dense. Pygidial plate with rounded apex, otherwise V-shaped. Sterna 2-4 with basal areas densely punctate, narrow apical areas similarly punctate except impunctate rims. Vestiture.- Vestiture white except as follows: vertex and dorsum of thorax often pale ochraceous, rarely darker; inner surfaces tarsi golden; tergum 6 golden; sterna golden brown with small white apicolateral patches on terga 2-4. Scopal hairs long, dense, simple, white. MALE. Measurements and Ratios.- N = 16; length, 9.5-10.5 mm; width, 3.0-3.5 mm; wing length, M = 2.55-0.165 mm; hooks in hamulus, M = 10.44-0.223; flagellar segment 2/1, M = 5.03 0.092. Integumental Color. Integument black except as follows: clypeus, base of mandible, and labrum white to pale yellow; clypeus never infuscated near posterior margin; flagellar segments 2-ll yellow to red below, dark red to reddish brown above; tegulae hyaline, colorless to yellow; wing membranes hyaline, colorless, veins red to reddish brown; terga with apical areas translucent, almost colorless to reddish brown with narrow rims colorless; sterna piceous with apical areas red to reddish brown with colorless rims; distitarsi red; tibial spurs pale yellow. Structure.- Head sculptured as in female; maxillary palpal segments 6, in ratio as 1.0:0.9:0.9:0.6:0.3:0.3; antennae as in albata but first segment longer, second segment about five times as long as first. Mesosoma sculptured as in female but mesonotum often shinier. Metasomal terga as in female but terga 2-5 with apical areas finely punctate except in narrow apical rims; tergum 1 with apical area impunctate as in female. Metasomal sterna as in female. Pygidial plate with apex truncate, or somewhat rounded, apicolateral notches evident unless worn, sides tapering towards truncate apex. Sternum 6 flat, without apicolateral teeth (Fig. 72); pattern of vestiture as drawn. Terminalia (Figs. 72-76) similar to albata. Note sternum 7 (Fig. 73) with apicomedian plates broad, weakly pointed apicomedially, vestiture abundant. Gonostylus and genital capsule as drawn (Figs. 75 and 76). Vestiture.- Color as in albata. Tergal vestiture as in albata but tergum 1 with apical area glabrous. Sternal vestiture weak but more abundant than in albata, especially on sterna 4 and 5; sternum 6 with short relatively sparse vestiture.

Names

Scientific source:

Discover Life bee species guide and world checklist, Ascher and Pickering. Integrated Taxonomic Information System

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