Melikertini
Creators: name: Engel, Michael S.
name: Davis, Steven R.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Apidae

description: Key to Genera of Melikertini
(modified and expanded from that of Engel, 2001 a, and Engel et al., 2014)
As noted by Engel et al. (2014) it remains unknown to what degree some of the characters presented here are gender or caste specific. Accordingly, care should be taken when using the key in relation to new material of hitherto unknown castes or sexes.
1. Disc of clypeus comparatively flat, without distinct lateral carinae and without bell-like concavity ...................................................................................................... 2
—. Clypeus with lateral carinae rising from apex to form margins of bell-like concavity arising from base of clypeus and overhanging disc (Figs. 10, 12, 14, 16) .. ....................................................................................... Aethemelikertes Engel, n. gen.
2(1). Clypeal protrusion present, i.e., base of clypeus produced into variously modified facial prominences, prominence bending upward over fronto-clypeal portion of epistomal sulcus and obscuring supraclypeal area or even lowermost frons in facial view (Figs. 3, 4, 6, 23–26) ................................................................... 3
—. Clypeal protrusion absent ......................................................................................... 4
3(2). Apex of clypeal protrusion narrow, narrower than intertorular distance (Figs. 3, 4, 6) ................................................................................................. Succinapis Engel
—. Apex of clypeal protrusion broad, as wide as or slightly wider than intertorular distance (Figs. 23–26) ................................................. Haidomelikertes Engel, n. gen.
4(2). Mesoscutellum without tongue-like medioapical extension [females: workers] ....................................................................................................................................... 5
—. Mesoscutellum with prominent, tongue-like medioapical extension projecting over metanotum, propodeum, and portions of metasoma, dorsal surface of extension densely setose [males: drones] ...................... Mochlomelikertes Engel et al.
5(4). Mesoscutellum bulging, overhanging metanotum and propodeum; apical margins of metasomal terga distinctly lighter than remainder of metasoma, thus metasoma appears banded; anterior and posterior margins of metabasitarus distinctly converging toward apex .......................................................................... 6
—. Mesoscutellum not bulging, not overhanging metanotum or propodeum; metasomal terga uniformly colored; anterior and posterior margins of metabasitarsus approximately parallel ........................................................................................ 7
6(5). Forewing with anterior margin of first submarginal cell approximately equal to length of anterior margin of second submarginal (i.e., r-rs as long as immediately succeeding abscissa of Rs); compound eyes converging below; second flagellomere distinctly shorter than third flagellomere, first flagellomere distinctly shorter than combined lengths of second and third flagellomeres ............. .............................................................................................................. Melissites Engel
—. Forewing with anterior margin of first submarginal cell many times longer than length of anterior margin of second submarginal cell (i.e., r-rs many times longer than immediately succeeding abscissa of Rs); compound eyes approximately parallel; second and third flagellomeres approximately equal in length, first flagellomere approximately equal to combined lengths of second and third flagellomeres .............................................................................. Roussyana Manning
7(5). Apical margin of clypeus straight, flat, not flared anteriorly and not projecting over plane of labrum (genus Melikertes Engel, s.l.) ................................................. 8
—. Apical margin of clypeus flared and projecting anteriorly over plane with labrum, medioapically with shallow U-shaped emargination (Figs. 34–36, 38, 39, 57, 58, 60–62) ................................................................... Amelikertotes Engel, n. gen.
8(7). Forewing with two submarginal cells (1rs-m absent) .............................................. ......................................................................... Paramelikertes Engel & Ortega-Blanco
—. Forewing with three submarginal cells (1rs-m present) .... Melikertes Engel, s.str.
description: Published as part of Engel, Michael S. & Davis, Steven R., 2021, New genera of melikertine bees with facial modifications in Baltic amber (Hymenoptera: Apidae), pp. 1-52 in Journal of Melittology 2021 (103) on pages 10-11, DOI: 10.17161/jom.i103.15655, http://zenodo.org/record/13146053