Key to the Stigmatomma species of Hong Kong SAR, China
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
- Antenna segment count 11 (Fig. 5C; Fig. 8B; Fig. 16A; Fig. 17C) => 4
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. 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. 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
- 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
- Antennal scrobes absent, not reaching occipital margin (Fig. 5B; Fig. 11A); head as wide and long (CI; 100-106) => 5
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
- 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. 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.
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
- 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. 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.