Ancyloscelis romeroi (Holmberg)

Schaller, A. & Roig-Alsina, A., 2021, A revision of the bee genus Ancyloscelis (Hymenoptera: Apidae) in Argentina, Zootaxa 4980 (3), pp. 521-540 : 533

Ancyloscelis romeroi (Holmberg)

( Figs. 6C , 7C , 8C , 11C , 13G )

Leptergatis romeroi Holmberg, 1903: 425 (Holotype female, Santa Helena, provincia de Entre Ríos, Argentina, 2-XI-1988, col. E. Boman, MACN, examined).

Ancyloscelis romeroi . Cerceau et al. 2019: 6.

Diagnosis. This is a medium sized species (length of forewing 6.0– 8.5 mm) easy to distinguish by the color of the forewing, which has a dark spot apical to the marginal cell, with the remainder of the wing margin paler. The pubescence is dense and long, the hairs on the mesopleuron are 3.2–4.1x MOD (male) and 2.3–3.0x MOD (female). Males are characterized by the orange scape and pedicel ( Fig. 8C ), and the shape of the hind basitarsus (11C), which has a basal inner rounded projection followed by a median tooth, and a broadly rounded apex. The hidden sterna and genital capsule have been drawn by Rodríguez and Roig-Alsina (2004).

Comments. The extensive synonymy of this species has been treated by Moure & Melo (2007); only recent citations are mentioned above.

Distribution. Argentina, Brazil and Paraguay. Argentina: provinces of Chaco, Buenos Aires, Córdoba, Entre Ríos, San Luis, Misiones and Santa Fe.

New records. Argentina. Chaco: 2 ♂, Resistencia , 11- XI-2017, A. Schaller ( MACN) ; 1 ♂, 1 ♀, Parque Caraguatá, 21-X-2016, A. Schaller ( MACN) ; 3♂, Villa Fabiana , 30-XII-2016, A. Schaller ( MACN) . Buenos Aires: 6 ♂, 3 ♀, Sierra de los Difuntos: Estancia Paititi , 6-I-2015, R. González V. ( MACN) ; 1 ♀, Azul , 15-II-2012, Sanguinetti ( MACN) . Misiones: 1 ♂, Depto. Concepción, Santa María , XI-1952, M. J. Viana ( MACN) .

Figures

FIGURE 6. Females, A. apiformis species group, lateral view. A, A. apiformis (Fabricius). B, A. nigricornis Rodríguez & Roig- Alsina. C, A. romeroi (Holmberg). D, A. saltensis Rodríguez & Roig-Alsina. Scale lines = 0.1 mm.

FIGURE 7. Males, A. apiformis species group, lateral view. A, A. apiformis (Fabricius). B, A. nigricornis Rodríguez & Roig- Alsina. C, A. romeroi (Holmberg). D, A. saltensis Rodríguez & Roig-Alsina. Scale lines = 0.1 mm.

FIGURE 8. Males, A. apiformis species group, head, frontal view. A, A. apiformis (Fabricius). B, A. nigricornis Rodríguez & Roig-Alsina. C, A. romeroi (Holmberg). D, A. saltensis Rodríguez & Roig-Alsina.

FIGURE 11. Males, A. apiformis species group, posterior basitarsus, ventral view.A, A. apiformis (Fabricius). B, A. nigricornis Rodríguez & Roig-Alsina. C, A. romeroi (Holmberg). D, A. saltensis Rodríguez & Roig-Alsina. Scale lines = 0.2 mm.

FIGURE 13. A–H, distribution map of Ancyloscelis species in Argentina.A, A. bonariensis. B, A. halictoides. C, A. holmbergi. D, A. mesopotamica. E, A. apiformis. F, A. nigricornis. G, A. romeroi. H, A. saltensis. Black dots, records from literature; red dots, new records.