Colletes nigricans

Kuhlmann, Michael & Proshchalykin, Maxim Yu., 2014, The bees of the genus Colletes Latreille 1802 of the European part of Russia, with keys to species (Hymenoptera: Apoidea: Colletidae), Zootaxa 3878 (3), pp. 201-247 : 242-244

publication ID	https://doi.org/ 10.11646/zootaxa.3878.3.1
publication LSID	lsid:zoobank.org:pub:27946DDF-5C41-43BD-988E-BF576FE85CDB
DOI	https://doi.org/10.5281/zenodo.6130130
persistent identifier	https://treatment.plazi.org/id/0380878C-407F-AC7A-51E3-F9DCC8D0F8ED
treatment provided by	Plazi
scientific name	Colletes nigricans
status

Treatment

Colletes nigricans View in CoL species-group

C. eous Morice : Figs 8a View FIGURE 8. a –b

Colletes hylaeiformis species-group C. hylaeiformis Eversmann : Figs 8 View FIGURE 8. a c–d Colletes mixtus species-group

C. kozlovi Friese 1913 View in CoL : Figs 8 View FIGURE 8. a e–f

Colletes roborovskyi View in CoL species-group C. roborovskyi Friese 1913 View in CoL : Figs 12 View FIGURE 12. a e–f Colletes uralensis View in CoL species-group

C. uralensis Noskiewicz 1936 View in CoL : Figs 14 View FIGURE 14. a e–f Colletes fodiens View in CoL species-group

C. daviesanus Smith 1846 View in CoL : Figs 11a View FIGURE 11. a –b C. fodiens ( Fourcroy 1785) View in CoL : Figs 11 View FIGURE 11. a c–d C. similis Schenck 1853 View in CoL : Figs 11 View FIGURE 11. a e–f

C. tuberculatus Morawitz View in CoL : Figs 12 View FIGURE 12. a c–d

Colletes senilis View in CoL species-group

C. hakkari Kuhlmann 2002 View in CoL : Figs 14a View FIGURE 14. a –b

C. laevifrons Morawitz 1893 View in CoL : Figs 13a View FIGURE 13. a –b

C. senilis ( Eversmann 1852) View in CoL : Figs 13 View FIGURE 13. a e–f

C. subnitens Noskiewicz 1936 View in CoL : Figs 14 View FIGURE 14. a c–d

Colletes clypearis View in CoL species-group

C. floralis Eversmann 1852 View in CoL : Figs 15a View FIGURE 15. a –b

C. impunctatus Nylander 1852 View in CoL : Figs 15 View FIGURE 15. a e–f

C. sidemii Radoszkowski 1891 View in CoL : Figs 16a View FIGURE 16. a –b

C. warnckei Kuhlmann 2002 View in CoL : Figs 15 View FIGURE 15. a c–d

Colletes marginatus View in CoL species-group

C. chengtehensis Yasumatsu View in CoL : Figs 16 View FIGURE 16. a c–d. This species is very similar to C. marginatus View in CoL but S7 is apically narrower, punctation on T1 is slightly finer and apical tergal hair bands are a bit broader than in C. marginatus View in CoL .

C. marginatus Smith View in CoL : Figs 16 View FIGURE 16. a e–f. See C. chengtehensis View in CoL .

Females

In some species groups it can be difficult to reliably identify the females without a reference collection. This especially applies to worn specimens where the pilosity is partly or entirely rubbed off.

1 Metanotum medially raised and conspicuously convex, with an apical drop almost overhanging the horizontal part of propo- deum ( Fig. 6 View FIGURE 6. a c)...................................................................................... 2

- Metanotum even or only slightly convex, in about the same level as the horizontal part of propodeum.................. 3

2 Head conspicuously elongate, malar area more than twice as long than width of base of mandible ( Fig. 28 View FIGURE 28. a c); T1-2 as in Fig. 28 View FIGURE 28. a d................................................................................... C. nasutus Smith View in CoL

- Head not elongate, malar area shorter than width of base of mandible; T1-2 as in Fig. 28 View FIGURE 28. a b; head as in Fig. 28a View FIGURE 28. a ............................................................................................ C. albomaculatus (Lucas) View in CoL

3 Facial fovea broad, about 3-4 times as wide as width of antennal flagellum ( Fig. 5a View FIGURE 5. a ); metasomal terga without distinct apical hair bands ( Fig. 27 View FIGURE 27. a f); large species (11–15 mm); head as in Fig. 27 View FIGURE 27. a e........................ C. cunicularius (Linnaeus) View in CoL

- Facial fovea narrow, sometimes up to about twice as wide ( Fig. 5 View FIGURE 5. a b) but usually only as wide as antennal flagellum or narrower; metasomal terga with apical bands or at least apicolateral hair patches; species usually smaller....................... 4

4 Pronotal edge with a very long and broad spine ( Fig. 6 View FIGURE 6. a d); T1-2 as in Fig. 28 View FIGURE 28. a f; head as in Fig. 28 View FIGURE 28. a e...... C. wacki Kuhlmann View in CoL

- Pronotal edge either without or just with a very short and thin spine............................................ 5

5 Propodeum laterally densely covered with short appressed hairs that at least partly hide the sculpture of integument ( Fig. 5 View FIGURE 5. a c); in some species only the lower part of the area is covered ( Fig. 5 View FIGURE 5. a d)............................................. 6

- Propodeum laterally mostly covered with sparse long erect hairs, sometimes with a few single short appressed hairs, integu- mental sculpture completely visible ( Fig. 5 View FIGURE 5. a e)............................................................... 13

6 Disc of scutum polished, without punctures or punctures dispersed (i >> d) and often small ( Fig. 19 View FIGURE 19. a e)................. 7

- Disc of scutum with dense and coarse punctation (i ≤ d) ( Fig. 6a View FIGURE 6. a ).............................................. 9

7 Malar area elongate, about as long as width of base of mandible ( Fig. 7 View FIGURE 7. a b); pilosity and puncation of T1 and T2 as in Fig. 27 View FIGURE 27. a d and sculpture of clypeus as in Fig. 27 View FIGURE 27. a c................................................. C. uralensis Noskiewicz View in CoL

- Malar area much shorter, less than ¼ as long as width of base of mandible........................................ 8

8 T1 medially without short appressed hairs ( Fig. 19 View FIGURE 19. a f); smaller (Bl = 7–9 mm).......................... C. kozlovi Friese View in CoL

- T1 almost completely covered with short appressed hairs ( Fig. 27 View FIGURE 27. a b); sculpture of clypeus as in Fig. 27a View FIGURE 27. a ; larger (Bl = 9–11 mm)................................................................................... C. roborovskyi Friese View in CoL

9 Apical tergal hair bands consisting of scale-like short and thick hairs ( Fig. 19 View FIGURE 19. a d); head as in Fig. 19 View FIGURE 19. a c.................................................................................................... C. hylaeiformis Eversmann View in CoL

- Apical tergal hair bands consisting of longer and more slender hairs............................................ 10

10 Anterior curvature of T1 laterally mostly covered with erect hairs, tergal sculpture visible ( Fig. 19 View FIGURE 19. a b); head as in Fig. 19a View FIGURE 19. a ............................................................................................ C. eous Morice View in CoL

- Anterior curvature of T1 at least laterally densely covered with appressed hairs hiding the tergal sculpture ( Figs 20a View FIGURE 20. a –b, e–f)................................................................................................... 11

11 Disc of T1 more sparsely punctate; apical tergal hair band of T2 slightly narrower ( Fig. 20 View FIGURE 20. a b)........ C. caspicus Morawitz View in CoL

- Punctation on disc of T1 variable but always more densely punctate; apical tergal hair band of T2 slightly broader ( Figs 20a View FIGURE 20. a , e–f).............................................................................................. 12

12 Punctation of T1 very fine and dense ( Fig. 20a View FIGURE 20. a )......................................... C. anceps Radoszkowski View in CoL

- Punctation of T1 variable but always slightly or distinctly coarser ( Figs 20 View FIGURE 20. a e–f); head as in Figs 20 View FIGURE 20. a c–d...................................................................................................... C. maidli Noskiewicz View in CoL

13 Vertex behind eyes sharply edged ( Fig. 7 View FIGURE 7. a c)................................................................ 14

- Vertex behind eyes rounded............................................................................ 15

The females of the following two species are very similar and difficult to differentiate due to the variability of C. chengtehensis View in CoL .

14 Apical tergal hair band of T2 narrower and punctation on discs of T1 and T2 slightly coarser ( Fig. 26 View FIGURE 26. a b); pilosity of head slightly darker and thinner ( Fig. 26a View FIGURE 26. a )...................................................... C. marginatus Smith View in CoL

- Apical tergal hair band of T2 broader and punctation on discs of T1 and T2 slightly finer ( Fig. 26 View FIGURE 26. a d–e); pilosity of head slightly paler and thicker ( Fig. 26 View FIGURE 26. a c), pilosity of metasomal terga variable ( Figs 26 View FIGURE 26. a d–e)............... C. chengtehensis Yasumatsu View in CoL

15 Clypeus laterally with conspicuous long diagonal wrinkles ( Fig. 23 View FIGURE 23. a c, sometime less distinct or hodden under pilosity); punctation and pilosity of T1 and T2 as in Fig. 23 View FIGURE 23. a d...................................... C. mlokossewiczi Radoszkowski View in CoL

- Clypeus without or with more or less vertical wrinkles; punctation and pilosity of T1 and T2 different................ 16

16 Posterior margin of T1 translucent orange to brown ( Figs 22 View FIGURE 22. a b, 25d, f)........................................... 17

- Posterior margin of T1 opaque dark brown to black.......................................................... 19

17 Punctation on disc of T1 coarser and extremely dense, integument between punctures dull ( Fig. 22 View FIGURE 22. a b); head as in Fig. 22a View FIGURE 22. a ....................................................................................... C. fodiens (Fourcroy) View in CoL

- Punctures on disc of T1 finer and more sparse, integument between punctures polished and shiny ( Figs 25 View FIGURE 25. a d, f)......... 18

18 Apical hair band of T2 medially narrow, punctation on disc of T1 more dispersed ( Fig. 25 View FIGURE 25. a f)............. C. collaris Dours View in CoL

- Apical hair band of T2 medially broad, punctation on disc of T1 denser ( Fig. 25 View FIGURE 25. a d); head as in Fig. 25 View FIGURE 25. a c.................................................................................................... C. succinctus (Linnaeus) View in CoL

19 Head broadly oval-shaped, much broader than wide ( Figs 4 View FIGURE 4 b, 22e, 23a, e)....................................... 20

- Head of different shape, if broader than long than less distinct................................................. 23

20 Apical 2/3 of scutellum completely and conspicuously flat, surface in the same level as metanotum ( Fig. 6 View FIGURE 6. a b); head as in Fig. 22 View FIGURE 22. a e; punctation and pilosity of T1 and T2 as in Fig. 22 View FIGURE 22. a f...................................... C. hakkari Kuhlmann View in CoL

- Scutellum more evenly rounded, medially above level of metanotum; head ( Figs 4 View FIGURE 4 b, 23a, e) and punctation and pilosity of T1 and T2 different ( Figs 4 View FIGURE 4 d, 23b, f)........................................................................ 21

21 Punctation on disc of T1 sparse (i> 1.5d), punctures small and often irregularly formed, integument between punctures smooth and shiny ( Fig. 23 View FIGURE 23. a b); head as in Fig. 23a View FIGURE 23. a ................................................. C. laevifrons Morawitz View in CoL

- Punctation on disc of T1 more dense (i <1.5d), punctures mostly large and regular ( Figs 4 View FIGURE 4 d, 23f)..................... 22

22 Punctation of T1 slightly more dispersed ( Fig. 4 View FIGURE 4 d); apical clypeal grooves relatively small ( Fig. 4 View FIGURE 4 b)...................................................................................................... C. subnitens Noskiewicz View in CoL

- Punctation of T1 a bit more dense ( Fig. 23 View FIGURE 23. a f); apical clypeal grooves larger ( Fig. 23 View FIGURE 23. a e)............. C. senilis (Eversmann) View in CoL

23 Malar area much shorter than 1/2 width of the base of mandible; head distinctly broader than long, more oval shaped ( Figs 21a View FIGURE 21. a , c, e, 22c).......................................................................................... 24

- Malar area about 1/2 as long as width of base of mandible; head longer, not oval-shaped ( Figs 24a View FIGURE 24. a , c, e, 25a).......... 27

24 Disc of T1 without hairs, very densely and coarsely punctate (i << d) ( Fig. 22 View FIGURE 22. a d); head as in Fig. 22 View FIGURE 22. a c..... C. similis Schenck View in CoL

- Disc of T1 at least basally with long, erect hairs, more sparsely punctate (i = 0.5–1d) ( Figs 21 View FIGURE 21. a b, d, f)................. 25 Due to intraspecific variation the differentiation of these species can be difficult without reference specimens.

25 Punctures on apical margin of T1 much smaller than on disc but punctation on apical margin much more dense ( Figs 21 View FIGURE 21. a f); head as in Fig. 21 View FIGURE 21. a e.................................................................... C. tuberculatus Morawitz View in CoL

- Punctures on apical margin of T1 much smaller than on disc but density of punctures about the same or only slightly higher ( Figs 21 View FIGURE 21. a b, d)....................................................................................... 26

26 Punctation on disc of T1 more dispersed; long and erect hairs occur on the disc and often up to the apical depression of T1 ( Fig. 21 View FIGURE 21. a b); head as in Fig. 21a View FIGURE 21. a ............................................................ C. daviesanus Smith View in CoL

- Punctation on disc of T1 more dense; long and erect hairs usually occur only on the anterior half of T1 ( Fig. 21 View FIGURE 21. a d); head as in Fig. 21 View FIGURE 21. a c........................................................................ C. inexpectatus Noskiewicz View in CoL

27 Punctation on disc of T1 sparse (i> 1.5d) ( Figs 24 View FIGURE 24. a d, f)....................................................... 28

- Punctation on disc of T1 dense (i <1.5d) ( Figs 24 View FIGURE 24. a b, 25b).................................................... 29

28 Terga with apical hair bands reduced to small lateral patches and without basal hair patches ( Fig. 24 View FIGURE 24. a d); head as in Fig. 24 View FIGURE 24. a c.................................................................................... C. impunctatus Nylander View in CoL

- Terga with well developed apical hair bands and basal hair patches ( Fig. 24 View FIGURE 24. a f); head as in Fig. 24 View FIGURE 24. a e … C. warnckei Kuhlmann View in CoL

29 Scutal disc with numerous black hairs, often abundantly covering the central part of scutum; T1-2 as in Fig. 24 View FIGURE 24. a b; head as in Fig. 24a View FIGURE 24. a ............................................................................ C. floralis Eversmann View in CoL

- Disc of scutum either without or rarely with very few isolated black hairs; T1-2 as in Fig. 25 View FIGURE 25. a b; head as in Fig. 25a View FIGURE 25. a .......................................................................................... C. sidemii Radoszkowski View in CoL