Icteranthidium Michener, 1948

Niu, Zeqing, Yuan, Feng & Zhu, Chaodong, 2020, Review of the bee genus Icteranthidium Michener, 1948 (Hymenoptera: Apoidea: Megachilidae: Anthidiini) from China, Zoological Systematics 45 (3), pp. 206-218 : 207-208

Icteranthidium Michener, 1948

Icteranthidium Michener, 1948: 25 . Type species: Anthidium limbiferum Morawitz, 1875 , by original designation.

Diagnosis. According to Michener (2007), the diagnosis of the genus is as the follows: Moderate-sized (body length: 7.5–18.0 mm); mandible with 4 short and large teeth in female and with 3 large teeth in male; maxillary palpus twosegmented; subantennal suture straight or nearly so; preoccipital ridge not carinate above but strongly so laterally, the carina slanting forward to the posterior mandibular articulation; pronotal lobe strongly lamellate; axilla usually pointed posteriorly; omaulus lamellate, but not continued onto venter of thorax; propodeum without fovea behind spiracle and row of pits across upper margin; arolia absent; basal vein of forewing nearly straight and meeting vein Cu at acute angle, jugal lobe of hind wing less than half as long as vannal lobe; T2 without a strong carina across summit of basal concavity; posterior margins of terga not depressed; T6 of female concave in profile, the margin convex with a median notch; T7 of male with a midapical projection, sometimes also a tooth or projecting lobe at each side.

Key to Chinese known species of Icteranthidium .

1. Flagellum 10-segmented, female .........................................................................................................................................................2 Flagellum 11-segmented, male.............................................................................................................................................................6

2. Body length 13.0–15.0mm ( Fig. 26 ); paraocular area black ( Fig. 27 )....................................................... I. laterale ( Latreille, 1809) Body length less than 13.0 mm; paraocular area yellow or ferruginous ...............................................................................................3

3. Paraocular area maculation reaching top of eye ( Fig. 2 ); paraocular area ferruginous; posterior margin of T2 with poorly developed median process.....................................................................................................................................................................................4 Paraocular area maculation not reaching top of eye ( Figs 16 , 36 ); paraocular area yellow; posterior margin of T2 either truncate or with well recognized triangle median process......................................................................................................................................5

4. Body length 8.5–10.0mm ( Fig. 1 ); ventral scopa golden-yellow ( Fig. 1 ); T1 laterally with sparse punctation, interstices reach several puncture diameters ................................................................................................................................. I. croceum ( Morawitz, 1877) Body length 7.5 mm; ventral scopa yellowish-brown, with very narrow white hairs at side; T1 laterally with dense punctation, interstices not reach puncture diameters........................................................................................... I. ferrugineum ( Fabricius, 1787)

5. Body length 7.0–9.0mm ( Fig. 16 ); frons without yellow maculation or with a very little maculation under middle ocellus ( Fig. 17 ); mesepisternum black, without yellow maculation ( Fig. 16 ); posterior margin of T2 truncate ( Fig. 22 ); T1 laterally with dense punctation, interstices not reach puncture diameters.............................................................................. I. grohmanni ( Spinola, 1838) Body length 7.0 mm ( Fig. 36 ); frons with a large rounded yellow maculation under middle ocellus ( Fig. 37 ); mesepisternum with a large triangular yellow maculation ( Fig. 36 ); posterior margin of T2 with a broad triangle median process ( Fig. 42 ); T1 laterally with sparse punctation, interstices reach several puncture diameters......................................................... I. limbiferum ( Morawitz, 1875)

6. Body length 15.0–16.0mm ( Fig. 29 ); posterior margin of T7 deeply emarginate, midapical projection narrow and long ( Fig. 35 )...... .................................................................................................................................................................. I. laterale ( Latreille, 1809) Body length less than 10.0 mm ( Figs 4 , 11 ); posterior margin of T7 truncate, midapical projection broad and short ( Figs 10 , 15 , 25 ). ............................................................................................................................................................................................................7

7. Paraocular area maculation reaching top of eye ( Figs 5 , 12 ); metasomal terga yellow or ferruginous except maculation ( Figs 9 , 14 ). ........................................................................................................................................................................................................... 8 Paraocular area maculation not reaching top of eye ( Figs 20 , 40 )); metasomal terga black except maculation ( Figs 24 , 44 ) ............9

8. Body length 6.0–8.0 mm ( Fig. 11 ); metasomal terga yellow except maculation ( Fig. 14 ); T1 laterally with dense punctation, interstices not reach puncture diameters............................................................................................................ I. ferrugineum ( Fabricius, 1787) Body length 8.0–9.0 mm ( Fig. 4 ); metasomal terga ferruginous except maculation ( Fig. 9 ); T1 laterally with sparse punctation, interstices reach several puncture diameters .......................................................................................... I. croceum ( Morawitz, 1877)

9. Body length 8.0–9.0 mm ( Fig. 19 ); mesepisternum black, without yellow maculation ( Fig. 19 ); T1 laterally with dense punctation, interstices not reach puncture diameters; T7 rectangulary rounded ...................................................... I. grohmanni ( Spinola, 1838) Body length 6.0 mm ( Fig. 39 ); mesepisternum with a large triangular yellow maculation ( Fig. 39 ); T1 laterally with sparse punctation, interstices reach several puncture diameters; T7 rounded laterally .................................................. I. limbiferum ( Morawitz, 1875)

Figures

Figures 26–31. Icteranthidium laterale (Latreille, 1809). 26–28. Female. 26. Body in lateral view; 27. Head in frontal view; 28. Mesosoma in dorsal view. 29–31. Male. 29. Body in lateral view; 30. Head in frontal view; 31. Mesosoma in dorsal view. Scale bars=1mm.

Figures 1–6. Icteranthidium croceum (Morawitz, 1877). 1–3. Female. 1. Body in lateral view; 2. Head in frontal view; 3. Mesosoma in dorsal view. 4–6. Male. 4. Body in lateral view; 5. Head in frontal view; 6. Mesosoma in dorsal view. Scale bars=1mm.

Figures 16–21. Icteranthidium grohmanni (Spinola, 1838). 16–18. Female. 16. Body in lateral view; 17. Head in frontal view; 18. Mesosoma in dorsal view. 19–21. Male. 19. Body in lateral view; 20. Head in frontal view; 21. Mesosoma in dorsal view. Scale bars=1mm.

Figures 36–41. Icteranthidium limbiferum (Morawitz, 1875). 36–38. Female. 36. Body in lateral view; 37. Head in frontal view; 38. Mesosoma in dorsal view. 39–41. Male. 39. Body in lateral view; 40. Head in frontal view; 41. Mesosoma in dorsal view. Scale bars=1mm.

Figures 22–25. Icteranthidium grohmanni (Spinola, 1838). 22–23. Female. 22. Metasoma in dorsal view; 23. Apex of metasoma in dorsal view, showing the T6. 24–25. Male. 24. Metasoma in dorsal view; 25. Apex of metasoma in dorsal view, showing the T6–7. Scale bars=1mm.

Figures 42–44. Icteranthidium limbiferum (Morawitz, 1875). 42–43. Female. 42. Metasoma in dorsal view; 43. Apex of metasoma in dorsal view, showing the T6. 44. Female, Metasoma in dorsal view. Scale bars=1mm.

Figures 32–35. Icteranthidium laterale (Latreille, 1809). 32–33.Female. 32. Metasoma in dorsal view; 33.Apex of metasoma in dorsal view, showing the T6. 34–35. Male. 34. Metasoma in dorsal view; 35. Apex of metasoma in dorsal view, showing the T6–7. Scale bars=1mm.

Figures 11–15. Icteranthidium ferrugineum (Fabricius, 1787), male. 11. Body in lateral view. 12. Head in frontal view. 13. Mesosoma in dorsal view. 14. Metasoma in dorsal view. 15. Apex of metasoma in dorsal view, showing the T6–7. Scale bars=1mm.

Figures 7–10. Icteranthidium croceum (Morawitz, 1877). 7–8. Female. 7. Metasoma in dorsal view; 8. Apex of metasoma in dorsal view, showing the T6. 9–10. Male. 9. Metasoma in dorsal view; 10. Apex of metasoma in dorsal view, showing the T6–7. Scale bars =1mm.