Camponotus

Rakotonirina, Jean Claude & Fisher, Brian L., 2018, Taxonomic revision of the Malagasy Camponotus subgenus Mayria (Hymenoptera, Formicidae) using qualitative and quantitative morphology, Zootaxa 4438 (1), pp. 1-58 : 14-19

Identification key to worker caste of the Malagasy Camponotus subgenus Mayria

1. Median portion of clypeus with longitudinal carina ( Fig. 2A )................................................... 2 - Median portion of clypeus without longitudinal carina ( Fig. 2B )................................................. 6 2. Smaller species (minor: CS: 0.70–1.26; major: 1.20–1.67); distal portion of procoxa white ( Fig. 3A )....................3 - Larger species (minor: CS: 0.73–1.37; major: CS: 1.39–2.1); procoxa without white patch ( Fig. 3B ).................... 4

3. Dorsum of mesosoma covered with numerous slender erect hairs and elongate appressed hairs; in lateral view, petiolar node higher than long ( Fig. 4A ).......................................................................... repens

- Pronotum, junction of dorsum and declivity surface of propodeum and posterodorsal margin of petiole each with one pair of elongate, stout erect hairs; a few short appressed hairs present on dorsum of mesosoma; in lateral view, petiolar node longer than high ( Fig. 4B )................................................................................. raina

4. In lateral view, mesosoma short and high; dorsal margin of petiolar node convex; dorsum of mesosoma covered with numerous (15-20) long erect hairs and a scattered short pubescence ( Fig. 5A )........................................ manabo

- In lateral view, mesosoma long and low, petiolar node tapered dorsally; dorsum of mesosoma covered with few (6-10) short erect hairs and abundant long pubescence ( Fig. 5B )........................................................... 5 5. Anteromedian clypeal margin projecting into an obtusely triangular lobe ( Fig. 6A )............................. liandia - Anteromedian clypeal margin broadly rounded, almost truncate ( Fig. 6B )................................... lubbocki 6. Apical margin of mandible armed with five teeth ( Fig. 7A )................................................. tanosy - Apical margin of mandible armed with six teeth ( Fig. 7B )...................................................... 7

7. Anteromedian margin of clypeus bordered by a lamella; in full-face view, head distinctly longer than broad (CWb/CL: minor: 0.68±0.01; major: 0.89±0.001) ( Fig. 8A ); in lateral view, junction of dorsal and declivity surfaces of propodeum broadly rounded.......................................................................................... sada

- Anteromedian margin of clypeus not bordered by a lamella; in full-face view, head not strongly longer than broad (CWb/CL: minor: 0.76±0.03–0.84±0.02; major: 0.93±0.04–1.01±0.02) ( Fig. 8B ); in lateral view, junction of propodeal dorsum and declivity surface with a distinct angle......................................................................8

8. In lateral view, mesosoma short and high, its dorsal outline continuously arched and dome-like in structure; propodeal declivity inclined posteriorly ( Fig. 9A )..........................................................................9

- In lateral view, mesosoma long and low, its dorsal outline not dome-like in structure; propodeal declivity inclined anteriorly ( Fig. 9B )........................................................................................... 11

9. In lateral view, propodeal dorsum slightly excised medially, petiole node longer than high ( Fig. 10A )............. .. lamosy

- In lateral view, propodeal dorsum smooth, without excision or concavity ( Fig. 10B ); petiole node as long as high or higher than long............................................................................................... 10

10. Larger species (CS: minor: 1.22±0.10; major: 1.64±0.12); in lateral view, petiole node distinctly higher than long ( Fig. 11A ); anteromedian margin of clypeus broadly convex ( Fig. 16B ).......................................... dromedarius

- Smaller species (CS: minor: 1.05±0.09; major: 1.50±0.11); in lateral view, petiole node as long as high ( Fig. 11B ); anteromedian margin of clypeus slightly concave medially ( Fig. 30B ).............................................. pulcher

11. Color of legs as the same as color of body, trochanters and distal portions of coxae yellow, reddish-black or dark brown; petiole node flattened anteroposteriorly ( Fig. 12A, 12B )............................................................12

- Legs with at least trochanters and distal portions of coxae yellowish to white, not as the same as color of body; petiole node not flattened anteroposteriorly, its dorsal margin distinctly broadly convex ( Fig. 12C ).................................. 13

12. Body entirely yellow to light brown, antenna becoming dark brown toward its apex ( Fig. 13A ).................. .. christi

- Body entirely or mostly black to reddish-black; antenna brown to dark brown basally and becoming dark brown to black toward its apex ( Fig. 13B )......................................................................... .. mainty

13. In lateral view, length of posterior portion of propodeal dorsum measured from the end of line connecting anteriormost point of pronotal shield and metathoracic spiracle as long as height of declivity ( Fig. 14A ); hind tibia shorter than hind femur; hind tibia shorter (HTL/CS: minor: 1.21±0.12; major: 1.07±0.14).............................................. maculiventris

- In lateral view, length of posterior portion of propodeal dorsum measured from the end of line connecting anteriormost point of pronotal shield and metathoracic spiracle roughly twice as long as height of declivity ( Fig. 14B ); hind tibia as long as hind femur; hind tibia longer (HTL/CS: minor: 1.33±0.06; major: 1.09±0.05).................................... foersteri

Figures

FIGURE 2. Head in full-face view. A: C. lubbocki (CASENT0486998). B: C. lamosy (CASENT0408976).

FIGURE 3. Mesosoma and petiolar node in lateral view. A: C. repens (CASENT0217300). B: C. lubbocki (CASENT0486998).

FIGURE 4. Mesosoma and petiolar node in lateral view. A: C. repens (CASENT0217300). B: C. raina (CASENT0499051).

FIGURE 5. Mesosoma and petiolar node in lateral view. A: C. manabo (CASENT0496383). B: C. lubbocki (CASENT0486998).

FIGURE 6. Head in full-face view. A: C. liandia (CASENT0803904). B: C. lubbocki (CASENT0486998).

FIGURE 7. Anterior portion of the head in full-face view. A: C. tanosy (CASENT0803890). B: C. maculiventris (CASENT0082042).

FIGURE 8. Head in full-face view. A: C. sada (CASENT0498916). B: C. christi (CASENT0129791).

FIGURE 9. Mesosoma in lateral view. A: C. dromedarius (CASENT0496817). B: C. christi (CASENT0129791).

FIGURE 10. Mesosoma in lateral view. A: C. lamosy (CASENT0408976). B: C. pulcher (CASENT0191639).

FIGURE 11. Mesosoma and petiole node in lateral view. A: C. dromedarius (CASENT0496817). B: C. pulcher (CASENT0191639).

FIGURE 12. Head, mesosoma and petiolar node in lateral view. A: C. christi (CASENT0129791). B: C. mainty (CASENT0487002). C: C. foersteri (CASENT0179450).

FIGURE 13. Head, mesosoma, petiolar node and part of the first gastral segment in lateral view. A: C. christi (CASENT0129791). B: C. mainty (CASENT0497845).

FIGURE 14. Mesosoma in lateral view. A: C. maculiventris (CASENT0082042). B: C. foersteri (CASENT0179450).

FIGURE 16. Camponotus dromedarius minor worker CASENT0496817. A: lateral view. B: head in full-face view. C: dorsal view.

FIGURE 30. Camponotus pulcher minor worker CASENT0191639. A: lateral view. B: head in full-face view. C: dorsal view.