Amelikertotes clypeata (Engel) Engel, Michael S. & Davis, Steven R., 2021

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 : 32

Amelikertotes clypeata (Engel) , new combination

( Figs. 29–70 )

Melikertes clypeatus Engel, 2001a: 128.

Holotype ⚲, AMNH (visum).

This species is described in full in Engel (2001a) and is further imaged here using PPC-SRµCT from two new specimens ( Fig. 29 ). Therefore a full description is not repeated here.

ADDITIONAL MATERIAL: 2⚲⚲, B-147, Baltic amber ( SEMC); 1⚲, Biterfeld amber (Geologisch-Paläontologisches Institut und Museum, Universität Hamburg, Hamburg, Germany) .

Figures

Figure 29. Two workers of Amelikertotes clypeata (Engel), new combination, in Eocene Baltic amber (SEMC B-147).

Figures 30–33. PPC-SRµCT scan of worker of Amelikertotes clypeata (Engel), new combination; upper right worker from figure 29. 30. Right lateral view. 31. Left lateral view. 32. Ventral view. 33. Dorsal view. Note that scan resolution was insufficient to resolve most fine setae.

Figures 34–39. PPC-SRµCT scan of worker head of Amelikertotes clypeata (Engel), new combination; upper right worker from figure 29. 34. Dorsal view. 35. Ventral view. 36. Facial view. 37. Posterior view. 37. Right lateral view. 38. Left lateral view. Arrows point to flared and cleft clypeus. Note that scan resolution was insufficient to resolve most fine setae.

Figures 40–45. PPC-SRµCT scan of fore- and midleg structures of worker of Amelikertotes clypeata (Engel), new combination; upper right worker from figure 29. 40. Foreleg, outer (prolateral) view. 41. Foreleg, anterior view. 42. Foreleg, inner (retrolateral) view. 43. Magnified view of metatibial-metabasitarsal joint showing auricle and rastellum. 44. Magnified view of protibial calcar. 45. Midleg. Note that scan resolution was insufficient to resolve most fine setae.

Figures 46–50. PPC-SRµCT scan of hind leg structures of worker of Amelikertotes clypeata (Engel), new combination; upper right worker from figure 29. 46. Right hind leg, outer (prolateral) view. 47. Right hind leg, inner (retrolateral) view. 48. Left metatibia, view along posterior edge. 49. Left hind leg, inner (retrolateral) view. 50. Left hind leg, outer (prolateral) view, note debris packed into surface of corbicula. Note that scan resolution was insufficient to resolve most fine setae.

Figures 51–56. PPC-SRµCT scan of worker of Amelikertotes clypeata (Engel), new combination; lower left worker from figure 29. 51. Left lateral view. 52. Dorsal view. 53. Outer (prolateral) view of hind leg. 54. Inner (retrolateral) view of hind leg. 55. Ventral view. 56. Right lateral view. Scale bar at right for 53 and 54, scale bar in center for 51, 52, 55, and 56. Note that scan resolution was insufficient to resolve most setae of the body and legs (e.g., posterior fringe of fine setae on metatibia is not resolved).

Figures 57–62. PPC-SRµCT scan of worker head of Amelikertotes clypeata (Engel), new combination; lower left worker from figure 29. 57. Facial view. 58. Right lateral view. 59. Posterior view. 60. Left lateral view. 61. Ventral view. 62. Ventral view with mandibles removed to reveal labrum. Scale bar in center for 57–60, scale bar at botom left for 61 and 62. Note that scan resolution was insufficient to resolve most fine setae.

Figures 63–70. PPC-SRµCT scan of mandibles of worker of Amelikertotes clypeata (Engel), new combination; lower left worker from figure 29. Right mandible rotated axially in left column, left mandible rotated axially in right column. 63. Outer (slightly ventral oblique) view of right mandible. 64. Outer (slightly ventral oblique) view of left mandible. 65. Dorsal view of right mandible. 66. Dorsal view of left mandible. 67. Inner view of right mandible. 68. Inner view of left mandible. 69. Ventral view of right mandible. 70. Ventral view of left mandible.