Ctenoplectrella, Cockerell, 1909

Engel, Michael S. & Davis, Steven R., 2021, New genera of melikertine bees with facial modifications in Baltic amber (Hymenoptera: Apidae), Journal of Melittology 2021 (103), pp. 1-52 : 44-45

Key to Species of Ctenoplectrella

(modified from Gonzalez & Engel, 2011)

1. Forewing 2rs-m arched apically in posterior half, thus second submarginal cell more strongly produced toward wing apex along posterior margin; medioapical margin of clypeus straight (shape of clypeus unknown in C. phaeton ) ........ 2

—. Forewing 2rs-m relatively straight and therefore second submarginal cell not more strongly produced toward wing apex along posterior margin; medioapical margin of clypeus gently convex [Baltic amber] ........... C. viridiceps Cockerell

2(1). Forewing basal vein confluent with cu-a; first submarginal cell shorter than second submarginal cell ............................................................................................ 3

—. Forewing basal vein distad cu-a; first submarginal cell as long as or longer than second submarginal cell ............................................................................................ 6

3(2). Mesepisternum impunctate laterally; metasomal terga faintly imbricate .......... 4

—. Mesepisternum with coarse, faint punctures laterally; metasomal terga with small, scatered punctures ......................................................................................... 5

4(3). Propodeal setae long, erect, and branched; tarsal setae fuscous; gena tapering in width from widest above to narrower below [Rovno amber] ........................... .................................................................................. C. zherikhini Engel & Perkovsky

—. Propodeal setae scatered, short, and simple; tarsal setae white or off-white; gena of relatively equal width along its length [Baltic amber] .............................. ........................................................................................................... C. grimaldii Engel

5(3). Metepisternum punctate; body pubescence distinctly short and sparse [Baltic amber] .......................................................................... C. phaeton Gonzalez & Engel

—. Metepisternum impunctate; body pubescence of moderate length, not distinctly short and sparse [Baltic amber] ................................................ C. cockerelli Engel

6(2). First submarginal cell as long as second submarginal cell; pleura punctate [Oise amber] .............................................................................. C. eocenica (Michez & Nel)

—. First submarginal cell longer than second submarginal cell; pleura impunctate [Baltic amber] ..................................................................................... C. gorskii Engel