Ancylosceles ursinus, Haliday, 1836

Schaller, A. & Roig-Alsina, A., 2021, A revision of the bee genus Ancyloscelis (Hymenoptera: Apidae) in Argentina, Zootaxa 4980 (3), pp. 521-540 : 522

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Ancylosceles ursinus


ursinus species group

This group is characterized by the presence of hooked hairs on the mouthparts of the females ( Figs. 9A–B View FIGURE 9 ). Hooked hairs are present on the stipes, on the prementum and on the first two segments of the labial palpus, except in A. halictoides , which lacks such hairs on the second segment of the palpus. One species, A. bonariensis , also has modified hairs on the hypostomal area of the head, on the trochanters, and on the metasomal sterna ( Fig. 9C View FIGURE 9 ). Species of the group are 6.2–11.0 mm long. Males have a ventral tubercle in front of the middle coxa, except A. bonariensis which lacks the tubercles. Yellowish hairs are usually present on the metasomal apical bands and/or on the tibial scopa of females ( Fig. 1 View FIGURE 1 ), and males of some species are entirely covered by golden pile ( A. ursinus , A. mesopotamica , A. duckei , and A. holmbergi ), or nearly so ( A. bonariensis ) ( Fig. 2 View FIGURE 2 ).