Glyptapis disareolata, Engel, 2001

ENGEL, MICHAEL S., 2001, A Monograph Of The Baltic Amber Bees And Evolution Of The Apoidea (Hymenoptera), Bulletin of the American Museum of Natural History 2001 (259), pp. 1-1 : 1-

Glyptapis disareolata , new species Figures 32–35 Plate 2f

DIAGNOSIS: This species is most similar to G. fuscula but differs most notably by the absence of areolae in the precoxal triangle.

DESCRIPTION: Female. Total body length 5.84 mm; forewing length 4.25 mm. Head

slightly wider than long (length 1.63 mm, width 1.91 mm). Upper interorbital distance 1.22 mm; lower interorbital distance 0.94 mm. Interocellar distance 0.38 mm; ocellocular distance 0.28 mm; median to lateral ocellus 0.16 mm. Intertegular distance 1.47 mm. Basal vein confluent with cu­a; first submarginal cell longer than second; 1m­cu enters second submarginal cell about four times vein width distad of second abscissa of Rs; 2rs­m distad 2m­cu by two times vein width; second submarginal cell gently narrowed anteriorly; 2rs­m gently curved; cu­a long; inner margin of pterostigma in first submarginal cell longer than width of pterostigma; inner margin of pterostigma in marginal cell gently convex; marginal cell apex acutely rounded, offset from wing margin by width of vein, not appendiculate; six distal hamuli, arranged in a single evenly spaced series (fig. 34).

Integument generally shining. Mandible with minute punctures separated by 1–2 times a puncture width, integument between smooth. Clypeus with minute punctures separated by 1–2 times puncture width, integument between smooth. Supraclypeal area sculptured as on clypeus. Face and vertex with minute punctures, more well­defined than those of clypeus and supraclypeal area, punctures separated by a puncture width, integument between smooth. Gena and postgena with minute punctures separated by a puncture width, integument between smooth. Pronotum with minute punctures separated by a puncture width, also with minute, transverse striae running along posterior edge of lateral ridge, integument between smooth. Mesoscutum strongly punctured; punctures moderately large (ca. 1/3 OD) and deep, separated by less 0.5–2 times puncture width, integument between such punctures smooth with minute punctures separated by 1–2 times their own diameter; anterior border of mesoscutum with deeper puncture closely packed. Tegula with minute punctures separated by a puncture width, integument between smooth. Scutellum sculptured as on mesoscutum except deep punctures restricted to posterior two­thirds. Metanotum with minute punctures separated by a puncture width, integument between smooth. Preëpisternal area (here used for anterior­facing surface of mesepisternum anterior to omaular carina: preepisternal suture is absent, as in other long­tongued bees) with minute punctures separated by a puncture width, integument between smooth. Mesepisternum coarsely reticulate­areolate, integument inside areolae smooth; precoxal triangle anteriorly separated from remainder of mesepisternum by narrow glabrous margin that is less than 0.5 times areola diameter in width, precoxal triangle without areolae (fig. 33). Metepisternum transversely striate, integument between striae smooth. Basal area of propodeum strongly areolate, areolae easily 1 OD in diameter, basal area two areolae in length and eight areolae wide; metapostnotum smooth and impunctate, bordered by areolae (0.5 OD in diameter) that converge ventrally just below propodeal pit; outside of areolate borders of metapostnotum on posterior propodeal surface a small glabrous zone of about 1 OD in width; lateral and ventral borders of posterior surface strongly areolate; lateral surface of propodeum dorsoventrally striate, integument between striae smooth. Metasomal terga and sterna faintly imbricate.

Coloration not well preserved; however, where evident, dark brown and without maculations. Wing membrane hyaline; veins strong and dark brown.

Mandible with minute, simple, subappressed setae, longer on ventral border. Clypeus with minute, appressed, simple setae not obscuring integument, such setae also on face below level of antennal sockets. Widely scattered, longer, erect setae on face, clypeus, and supraclypeal area; appressed, minute se­ tae disappearing by supraclypeal area; face with longer erect setae intermixed with short, suberect setae; vertex with long, erect setae, each bearing a few minute branches. Gena with similar setae as those of vertex, although shorter, subappressed (not obscuring integument), and simple. Postgena with long, erect, widely scattered setae. Pronotum with scattered, minute, simple setae, appressed but not obscuring the integument except on pronotal lobe setae dense and short and along dorsal carina setae short, erect, and each with a few minute branches. Mesoscutum with short, plumose setae arising out of large, deep punctures, also with minute, sparse setae in interspaces between punctures. Tegula with minute, appressed, simple setae not obscuring integument. Scutellum with pubescence as on mesoscutum except setae slightly longer. Metanotum with minute, erect, simple setae widely scattered. Preëpisternal area without pubescence; setae of mesepisternum (posterior to omaular carina) as on mesoscutum; metepisternum with scattered, short, simple setae. Basal area and posterior surface of propodeum without pubescence; lateral surface of propodeum with pubescence as described for metepisternum. Pubescence of legs generally simple and short except those setae of tarsi long; inner surface of metafemur without pubescence, outer, anterior, and posterior surfaces with short, branched setae; metatibia with numerous, somewhat long, setae on all surfaces, most of those on inner surface simple but a few with minute branches, those of outer surface with several, short branches. Central discs of metasomal terga with sparse, minute, simple, appressed setae, setae longer and erect to suberect on lateral borders; sternal scopa composed of dense, long, erect, simple setae.

MATERIAL: Two specimens. Holotype. Female, B­JH 104 ( AMNH) labeled: ‘‘Baltic amber: Eocene, Kaliningrad, Yantarny’’ // ‘‘ Holotype, Glyptapis disareolata Engel’’.

Paratype. Female, B­W 156 ( AMNH) labeled: ‘‘Baltic amber: Eocene, Kaliningrad, Yantarny’’ // ‘‘ Paratype, Glyptapis disareolata Engel’’.

ETYMOLOGY: The specific epithet is a combination of the Latin words dis (meaning ‘‘without’’) and areolatus (meaning ‘‘small spaces’’) and is a reference to the absence of areolae in the precoxal triangle.

Figures

Fig. 32. Frontal view of head of holotype female of Glyptapis disareolata, new species. Scale bar = 1 mm.

Fig. 33. Right ventrolateral oblique view of head and mesosoma of holotype female of Glyptapis disareolata, new species.

Fig. 34. Hind wing of holotype female of Glyptapis disareolata, new species. Scale bar = 1 mm.

Figs. 35–36. Leg structures of Glyptapis species. 35. Claw and arolium of Glyptapis disareolata, new species. 36. Metafemur, metatibia, and metatarsus of female of Glyptapis fuscula Cockerell. Scale bars = 0.5 mm (a), 0.25 mm (b); (a = fig. 36; b = fig. 35).