Mielkeanthidium albertinoi, Parizotto, Daniele R. & Urban, Danúncia, 2011

Parizotto, Daniele R. & Urban, Danúncia, 2011, New resin bee species in the genus Mielkeanthidium Urban (Hymenoptera, Megachilinae), Zootaxa 3139, pp. 55-62 : 61-62

Key to Mielkeanthidium species

Note. Males of M. ornatum and females of M. albertinoi sp. nov. and M. tucumanum sp. nov., are unknown.

1 Males ............................................................................................... 2

- Females............................................................................................ 6

2 Sixth tergum with straight distal margin, without a median projection; distal tergum with truncate lateral lobes, lobe bases as wide as apices, space between lobes narrower or same as lobes width ( Fig. 27 ); apex of third sternum with a median emargination on distal margin and without long curved hairs ( Fig. 30 ).................................................. 3

- Sixth tergum with an apical projection at middle; distal tergum with acute lateral lobes, lobes wider basally than distally, space between lobes about twice as wide as lobe width ( Fig. 28, 29 ); apex of third sternum without a median emargination and with long curved hairs ( Fig. 31 )............................................................................. 4

3 Clypeus yellow in the first apical 2/3 (Fig. 5); scutellum black; basal tergum and third to fifth terga with a complete yellow band; sixth tergum black; distal tergum darkish brown with two lateral maculae; third to fifth sterna darkish brown.................................................................................................... M. nigripes

- Clypeus totally yellow (Fig. 7); scutellum with apical yellow band; basal tergum with yellow lateral bands only; third to fifth terga with discal yellow band only; sixth tergum with distal yellow band; distal tergum almost entirely yellow; third to fifth sterna almost entirely yellow................................................................... M. rubripes

4 Vertex with coarse, darkish brown hairs; pronotal lobe black; axillae and scutellum without yellow maculae, or with weak yellow maculae (Fig. 11); basal half of second tergum densely punctate, punctures separated by almost half of a puncture diameter ( Fig. 25 )............................................................................. M dissimile sp. nov.

- Vertex with fine and amber hairs; pronotal lobe with a yellow macula; axillae and scutellum with wide yellow band (Figs. 10, 12); punctures of basal half of second tergum sparse, punctures separated by a puncture diameter or more ( Figs. 24, 26 ).... 5

5 Third to sixth terga densely punctate, punctures separated by less than a half of a puncture diameter; sixth and seventh terga almost totally yellow; sixth tergum with median projection short, truncate ( Fig. 28 ); third sternum light brown............................................................................................... M. albertinoi sp. nov.

- Third to sixth terga with large punctures, punctures separated by more than half than punctures diameter; sixth and seventh terga with a large yellow band, wider medially on sixth; sixth tergum with median projection elongated, acute; third sternum yellow ( Fig. 29 )..................................................................... M. tucumanum sp. nov.

6 Mandible with four-toothed; propodeum base with well-developed row of pits across its upper margin.. M. dissimile sp. nov.

- Mandible with three-toothed; propodeum base with a row of pits larger laterally and narrowed medially................. 7

7 Paraocular area with large yellow maculae almost reaching median ocellus (Fig. 9); postocellar band reaching the first third of gena and narrower at middle (Fig. 20); distal tergum with a large yellow maculae (Fig. 16).................. M. ornatum

- Paraocular area with a little yellow spot at sides of antennal sockets (Figs. 6, 8); postocellar area with two small yellow lines behind eyes (Figs. 17, 18); distal tergum black (Fig. 14)....................................................... 8

8 Second and third terga with finer punctures on disc than in the remaining surface; third to fifth terga with compete yellow band, emarginated at middle (Fig. 13); scutellum black (Fig. 17); legs dark brown, without ferruginous areas.... M. nigripes

- Second and third terga uniformly punctate; third to fifth terga with discal yellow band only (Fig. 14); scutellum with distal yellow band (Fig. 18); fore and mid tibiae and basitarsus with ferruginous areas............................. M. rubripes

Figures

FIGURES 21 – 31. Lateral (21 – 23) and dorsal (24 – 26) views of metasoma of male. 21, 24 M. albertinoi sp. nov.; 22, 25 M. dissimile sp. nov.; 23, 26 M. tucumanum sp. nov. Apex of metasoma (27 – 29) and details of sterna of male (30 – 31), 27, 30 M. rubripes; 28, M. albertinoi sp. nov.; 29, 31 M. tucumanum sp. nov. Scale = 1.0 mm (Figs. 21 – 23). Scale = 0.5 mm (Figs. 24 – 31).