Key to the Stigmatomma species of Hong Kong SAR, China

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Key to the Stigmatomma species of Hong Kong SAR, China, based on workers (from Hamer et al., 2023).

1

  • Antenna segment count 12 (Fig. 3A; Fig. 11A) => 2
  • Hamer, M.T., Pierce, M.P. et al. 2023. The Amblyoponinae of Hong Kong (10.20362@am.016005), Fig. 3.jpg
  • Hamer et al. (2023), Fig. 11. Stigmatomma nr. quadratum group worker (ANTWEB1010866): A) head view B) dorsal view C) lateral view, and male (ANTWEB1009609): D) head view E) dorsal view F) lateral view.
  • Antenna segment count 11 (Fig. 5C; Fig. 8B; Fig. 16A; Fig. 17C) => 4
  • Hamer et al. (2023), Fig. 5. The holotype specimen of Stigmatomma draconis (ANTWEB1010999) A) Lateral view; B) dorsal view; C) full face view.
  • Hamer et al. (2023), Fig. 8. Stigmatomma luyiae A) profile view B) head view C) closeup of mandibles.
  • Hamer et al. (2023), Fig. 16. Stigmatomma zwaluwenburgi worker (ANTWEB1010860); A) head view B) lateral view C) dorsal view.
  • Hamer et al. (2023), Fig. 17. Stigmatomma zwaluwenburgi, comparing A) CASENT0173925 (April Nobile); B) a specimen from the type locality to the original representation by Williams (1946); C) the newly collected specimens from Hong Kong (ANTWEB1010859). Pictures available from www.antweb.org.

2

return to couplet #1

  • Large (TL 8.7-10.4); head almost as wide and long (CI 94.46-99.65); eye conspicuous; genal teeth truncated apically (Fig 11A; Fig 14A); cephalic integument immediately adjacent to longitudinal strip with deep foveate pits (Fig 15G-I) => Stigmatomma nr. quadratum
  • Hamer et al. (2023), Fig. 11. Stigmatomma nr. quadratum group worker (ANTWEB1010866): A) head view B) dorsal view C) lateral view, and male (ANTWEB1009609): D) head view E) dorsal view F) lateral view.
  • Hamer et al. (2023), Fig. 14. Genal tooth shapes, in full face view, across species within the Stigmatomma reclinatum group. Stigmatomma nr. quadratum (A; ANTWEB1010866), Stigmatomma quadratum (B; CASENT0916797, Flavia Esteves), S. reclinatum (C; ZRC_HYM_571.1), S. bellii (D; CASENT0102510, April Nobile), S. rothneyi (E; CASENT0102517, April Nobile) and S. crenatum (D; CASENT0104983, April Nobile). Stigmatomma feae holotype (CASENT0102126) not included here. Pictures available from www.antweb.org.
  • Small (TL 3.5-4.1); head distinctly longer than wide (87-89.13); eye minute to absent; genal teeth tapering to a point apically (Fig. 3A; Fig. 10D); cephalic integument without deep foveate pits (Fig 3A; Fig. 9C) => 3
  • Hamer et al. (2023), Fig. 3. Stigmatomma amblyops worker (ANTWEB1017021) A) head view B) lateral view C) dorsal view.
  • Hamer et al. (2023), Fig. 10. Stigmatomma pagei (ANTWEB1010972) holotype morphological characters. A) mesosoma dorsum; B) petiole in lateral view; C) anterior clypeal margin and mandibles; D) minute genal teeth and anterior head region; E) mesosoma in lateral view; F) terminal gastral segments in lateral view.

3

return to couplet #2

  • Genal teeth conspicuous (Fig. 3A); dorsolateral propodeal margin lacking margination (Fig. 3B); metanotal groove absent (Fig 3C); median clypeal denticles conical, distinctly extending from the anterior clypeal margin (Fig. 3A) => Stigmatomma amblyops
  • Hamer et al. (2023), Fig. 3. Stigmatomma amblyops worker (ANTWEB1017021) A) head view B) lateral view C) dorsal view.
  • Genal teeth present but inconspicuous (Fig. 10D); dorsolateral propodeal margin marginated (Fig. 10E); metanotal groove present, weakly impressed (Fig. 10A); median clypeal denticles small, not distinctly extending beyond anterior clypeal margin (Fig. 10C-D) => Stigmatomma pagei
  • Hamer et al. (2023), Fig. 10. Stigmatomma pagei (ANTWEB1010972) holotype morphological characters. A) mesosoma dorsum; B) petiole in lateral view; C) anterior clypeal margin and mandibles; D) minute genal teeth and anterior head region; E) mesosoma in lateral view; F) terminal gastral segments in lateral view.

4

return to couplet #1

  • Antennal scrobes present, nearly reaching the occipital margin (Fig 4A); head longer than wide (CI; 85.4-87.1)) => Stigmatomma crypticum
  • Hamer et al. (2023), Fig. 4. Stigmatomma crypticum worker (ANTWEB1010855): A) head view B) dorsal view C) lateral view, and dealate queen (ANTWEB1010854) D) head view E) dorsal view F) lateral view.
  • Antennal scrobes absent, not reaching occipital margin (Fig. 5B; Fig. 11A); head as wide and long (CI; 100-106) => 5
  • Hamer et al. (2023), Fig. 5. The holotype specimen of Stigmatomma draconis (ANTWEB1010999) A) Lateral view; B) dorsal view; C) full face view.
  • Hamer et al. (2023), Fig. 11. Stigmatomma nr. quadratum group worker (ANTWEB1010866): A) head view B) dorsal view C) lateral view, and male (ANTWEB1009609): D) head view E) dorsal view F) lateral view.

5

return to couplet #4

  • Denticles on anterior clypeal margin absent (Fig. 8B-C); mandibles as long as head length (MI 93.3-100) => Stigmatomma luyiae
  • Hamer et al. (2023), Fig. 8. Stigmatomma luyiae A) profile view B) head view C) closeup of mandibles.
  • Denticles on anterior clypeal margin present (Fig. 5A; Fig. 6D; Fig 7B; Fig. 16A; Fig. 17C); mandibles shorter than head length (MI 52.8-78) => 6
  • Hamer et al. (2023), Fig. 5. The holotype specimen of Stigmatomma draconis (ANTWEB1010999) A) Lateral view; B) dorsal view; C) full face view.
  • Hamer et al. (2023), Fig. 6. Stigmatomma draconis (ANTWEB1010999) holotype morphological characters. A) mesosoma dorsum; B) petiole in lateral view; C) terminal gastral segments in lateral view; D) head in ventral view, showing minute posterolateral teeth, anterior clypeal denticles and mandibular teeth; E) mesosoma in lateral view; F) petiole dorsum.
  • Hamer et al. (2023), Fig. 7. Mandibular and anterior head caparison between Stigmatomma pertinax holotype and S. draconis. A) Stigmatomma pertinax (CASENT0906831); B) Stigmatomma draconis (ANTWEB1010999).
  • Hamer et al. (2023), Fig. 16. Stigmatomma zwaluwenburgi worker (ANTWEB1010860); A) head view B) lateral view C) dorsal view.
  • Hamer et al. (2023), Fig. 17. Stigmatomma zwaluwenburgi, comparing A) CASENT0173925 (April Nobile); B) a specimen from the type locality to the original representation by Williams (1946); C) the newly collected specimens from Hong Kong (ANTWEB1010859). Pictures available from www.antweb.org.

6

return to couplet #5

  • Smaller (TL 1.88-1.94); third apical mandibular tooth long and jigsaw tab-like (Fig. 16A; Fig. 17C); absence of paired teeth on mandible (Fig. 16A; Fig. 17C); 5 denticles on anterior clypeal margin (Fig. 16A; Fig. 17C) => Stigmatomma zwaluwenburgi
  • Hamer et al. (2023), Fig. 16. Stigmatomma zwaluwenburgi worker (ANTWEB1010860); A) head view B) lateral view C) dorsal view.
  • Hamer et al. (2023), Fig. 17. Stigmatomma zwaluwenburgi, comparing A) CASENT0173925 (April Nobile); B) a specimen from the type locality to the original representation by Williams (1946); C) the newly collected specimens from Hong Kong (ANTWEB1010859). Pictures available from www.antweb.org.
  • Larger (TL 2.39); third apical mandibular tooth not jigsaw tab-like, short and recurved upwards instead (Fig. 5C; Fig. 6D; Fig. 7B); presence of paired teeth on mandible (Fig. 5C; Fig. 6D; Fig. 7B); 10 denticles on anterior clypeal anterior margin (Fig. 6D) => Stigmatomma draconis
  • Hamer et al. (2023), Fig. 5. The holotype specimen of Stigmatomma draconis (ANTWEB1010999) A) Lateral view; B) dorsal view; C) full face view.
  • Hamer et al. (2023), Fig. 6. Stigmatomma draconis (ANTWEB1010999) holotype morphological characters. A) mesosoma dorsum; B) petiole in lateral view; C) terminal gastral segments in lateral view; D) head in ventral view, showing minute posterolateral teeth, anterior clypeal denticles and mandibular teeth; E) mesosoma in lateral view; F) petiole dorsum.
  • Hamer et al. (2023), Fig. 7. Mandibular and anterior head caparison between Stigmatomma pertinax holotype and S. draconis. A) Stigmatomma pertinax (CASENT0906831); B) Stigmatomma draconis (ANTWEB1010999).

References