Ceratina (Zadontomerus)

Flórez-Gómez, Nathalia, Ayala, Ricardo, Hinojosa-Díaz, Ismael & Morrone, Juan J., 2022, The Neotropical Species Of Small Carpenter Bees Of The Subgenus Ceratina (Zadontomerus) Ashmead, 1899 (Hymenoptera: Apidae), Zootaxa 5214 (2), pp. 189-223 : 221-222

Key to the Neotropical species of Ceratina (Zadontomerus)

Females

1. Pronotal lobe with yellow mark......................................................................... 2

- Pronotal lobe without yellow mark, same color as the rest of mesosoma.......................................... 5

2. Anterior tibia with a longitudinal yellow mark, scutum disc almost entirely impunctate (Fig x). C. nautlana Cockerell, 1897

- Anterior tibia with yellow spot at the base, scutum disc with punctures along the medial line.......................... 3

3. Preoccipital carina well pronounced, foveate and forming a strong depression; total length no greater than 6 mm .................................................................................................. C. kopili sp. n.

- Preoccipital carina foveate, not forming a strong depression; total length from 6.5–9 mm ............................ 4

4. Gena impunctate, polished area adjacent to eye broad, 1/3 genal width; disc of scutum with sparse, fine punctures along the median line, separated by a distance up to 5 times a puncture diameter; wings subhyaline.............. C. basaltica sp. n.

- Gena impunctate, polished area adjacent to eye narrow, gena punctures covering almost all surface; disc of scutum with coarse punctures dispersed along median line, separated by a distance up to 3 times a puncture diameter ( Fig. 21C ); wings moderately dark brownish.......................................................................... C. rehanae sp. n.

5. Clypeus yellow mark small and narrow (length 3 times middle width) or absent................................... 6

- Clypeus with oval and wide yellow mark (length up to 2.5 times middle width).................................... 7

6. Propodeal triangle striate throughout, with conspicuous lateral striae; body green olivaceous with metallic tints; clypeus with narrow yellow mark, T4 posterior margin with thick and long hairs ( Fig 15E )...................... C. raquelitae sp. n.

- Propodeal triangle polished with single medial stria; body dark metallic blue, sometimes dark green; clypeus with or without reduced yellow mark; T4 posterior margin with thin hairs, scarce thick hairs........................ C. sapphira sp. n.

7. Stigma yellowish or light brown; posterior margin of T4, T5 and T6 with dense yellowish pubescence; olive green propodeum contrasting with black scutum and scutellum........................................... C. capitosa Smith, 1879

- Stigma brown to dark brown; posterior margin of T4, T5 and T6 with dispersed pubescence; mesosoma entirely green olivaceous or blue............................................................................................ 8

8. Head and mesosoma metallic blue, metasoma green or copper with metallic tints; vertex with short and sparse pubescence.. ................................................................................................... 9

- Head, mesosoma and metasoma green olivaceous with metallic tints; vertex with long, yellowish and scattered pubescence....................................................................................... C. tepetlana sp. n.

9. Metasoma length about twice or more the width; total length from 7.0 to 9.0 mm............... C. ignara Cresson, 1878

- Metasoma short, length less than twice the width; total length from 5.5 to 7.0 mm................. C. indigovirens sp. n.

Males

1. Pronotal lobe with yellow mark......................................................................... 2

- Pronotal lobe without a yellow mark, same color as the rest of mesosoma........................................ 5

2. T7 with two laminar projections forming a middle notch, slightly evident in some specimens ( Fig. 22 C-D); anterior tibia with longitudinal yellow mark......................................................... C. nautlana Cockerell, 1897

- T7 with posterior margin concave, forming a medial narrowly rounded projection ( Fig. 22E, F, J ); anterior tibia with a yellow spot at the base....................................................................................... 3

3. Preoccipital carina well pronounced, foveate and beginning in the upper third of occiput, forming strong depression ( Fig 7E ); hind femur with strong ventral dilation forming an angle as in Figure 21D ; total length from 4.0– 5.5 mm .... C. kopili sp. n.

- Preoccipital carina foveate not forming strong depression; hind femur with strong ventral dilation forming an angle as in Figures 21E, 21I ; total length from 6.0–8.0 mm............................................................. 4

4. T6 with swollen area strongly evident under a yellowish tuft of pubescence; wings subhyaline; hind trochanter ventrally rounded; hind femur with ventral dilation forming an angle as in the figure 21E..................... C. basaltica sp. n.

- T6 surface without swollen area, middle area with a yellowish tuft of pubescence; wings brownish, marginal cell darker than the rest of the forewing; hind trochanter ventral surface forming a right angle; hind femur with ventral dilation forming an angle ( Fig. 21I ).............................................................................. C. rehanae sp. n.

5. Lower paraocular area with yellow marks; T7 with concave lateral margins, distal margin truncate ( Fig. 22B ).......................................................................................... … C. ignara Cresson, 1878

- Lower paraocular area without yellow marks; T7 with two posterior projections forming middle notch or with concave lateral margins forming a medial projection …................................................................... 6

6. T7 with two posterior projections forming middle notch ….................................................... 7

- T7 with concave lateral margins forming medial projection..................................................… 8

7. Head and mesosoma metallic blue, metasoma metallic green; hind femur with strong rounded ventral dilation ( Fig. 21J ); outer margin of gonocoxite rounded ( Fig. 20 ) …................................................ C. indigovirens sp. n.

- Body entirely dark metallic green; hind femur with ventral slight dilation round shaped ( Fig. 21H ); outer margin of gonocoxite apex forming an acute angle ( Fig. 16 ) ….................................................... C. raquelitae sp. n.

8. Clypeus with transversal yellow mark in the lower area; propodeal triangle polished, with a middle stria; body entirely metallic dark blue (dark green in some cases) …...................................................... C. sapphira sp. n.

- Clypeus with T-shaped yellow mark; propodeal triangle striate; body entirely olivaceous green or head and metasoma black and mesosoma olivaceous green ….......................................................................... 9

9. Stigma light brown; hind trochanter and femur with scarce pubescence ( Fig. 21A ); head and mesosoma except propodeum black with metallic tints, propodeum and metasoma olivaceous green (…)...................... C. capitosa Smith, 1879

- Stigma dark brown; hind trochanter with dense long pubescence; hind femur basal half with disperse long pubescence ( Fig. 21F ); body entirely olivaceous green (…).................................................... C. tepetlana sp. n.

Figures

FIGURE 7. Ceratina kopili sp. n. A: Holotype, female lateral habitus, B: Holotype, female frontal view, C: Paratype, male lateral habitus, D: Paratype, male frontal view, E. Paratype, male preoccipital carina.

FIGURE 15. Ceratina raquelitae sp. n. A: Paratype, female lateral habitus, B: Paratype, female frontal view, C: Holotype, male lateral habitus, D: Holotype, male frontal view, E: Paratype, female metasoma, thick pubescence on T4-T6.

FIGURE 16. Genital capsule of Ceratina raquelitae sp. n male A: Dorsal view, B: Ventral view.

FIGURE 20. Genital capsule of Ceratina indigovirens sp. n male A: Dorsal view, B: Ventral view.

FIGURE 21. Scutum of females A: Ceratina nautlana, B: Ceratina kopili sp. n., C. Ceratina rehanae sp. n.

FIGURE 22. Hind trochanter and femur from males of the Ceratina (Zadontomerus) species: A. C. capitosa, B. C. ignara, C. C. nautlana, D. C. kopili sp. n., E. C. basaltica sp. n., F. C. tepetlana sp. n., G. C. sapphira sp. n., H. C. raquelitae sp. n., I. C. rehanae sp. n., J. C. indigovirens sp. n.