Key to Vombisidris workers

Key to known species of Vombisidris based on workers (updated from Xu & Yu (2012) by Jeenthong et al. (2023)).

1

Subocular groove entirely absent (Fig. 3A, Papua New Guinea) => Vombisidris bilongrudi

Head of Vombisidris bilongrudi worker

Profile of Vombisidris bilongrudi worker

Subocular groove at least present from mandibular insertion to eye (Fig. 3B-C) => 2

Jeenthong et al. (2023), Fig. 3. Vombisidris spp. A, V. bilongrudi (CASENT0901985, paratype worker); B, V. acherdos (CASENT0178734, paratype worker); C, V. occidua (CASENT0901990, holotype worker); D, V. philax (ASENT0178736, paratype worker); E, V. philippina (CASENT0919713, paratype worker); F, V. regina (CASENT0102595, paratype worker); G, V. lochme (CASENT0901987, holotype worker); H, V. tibeta (modified from Xu and Yu, 2012); I, V. umbrabdomina (modified from Xu and Yu, 2012).

2

return to couplet #2

Subocular groove incomplete, running from mandibular insertion to anteroventral margin of eye, never beyond eye (Fig. 3B, Papua New

Guinea) => Vombisidris acherdos

Head of Vombisidris acherdos worker

Profile of Vombisidris acherdos worker

Subocular groove complete, running from mandibular insertion to anteroventral margin of eye, then passing through a shallow angle and

continuing along the side to lateroccipital margin (Fig. 3C) => 3

Jeenthong et al. (2023), Fig. 3. Vombisidris spp. A, V. bilongrudi (CASENT0901985, paratype worker); B, V. acherdos (CASENT0178734, paratype worker); C, V. occidua (CASENT0901990, holotype worker); D, V. philax (ASENT0178736, paratype worker); E, V. philippina (CASENT0919713, paratype worker); F, V. regina (CASENT0102595, paratype worker); G, V. lochme (CASENT0901987, holotype worker); H, V. tibeta (modified from Xu and Yu, 2012); I, V. umbrabdomina (modified from Xu and Yu, 2012).

3

return to couplet #2

In profile view, dorsum of mesonotum with a pair of short vertical sharp teeth at each side (Fig. 3D); anterior 2/3 of first gastral tergite

longitudinally rugulose (Indonesia) => Vombisidris philax

Head of Vombisidris philax worker

Profile of Vombisidris philax worker

In profile view, dorsum of mesonotum without a pair of vertical sharp teeth, at most with a pair of blunt prominence (Fig. 3E); first gastral

tergite entirely smooth => 4

Jeenthong et al. (2023), Fig. 3. Vombisidris spp. A, V. bilongrudi (CASENT0901985, paratype worker); B, V. acherdos (CASENT0178734, paratype worker); C, V. occidua (CASENT0901990, holotype worker); D, V. philax (ASENT0178736, paratype worker); E, V. philippina (CASENT0919713, paratype worker); F, V. regina (CASENT0102595, paratype worker); G, V. lochme (CASENT0901987, holotype worker); H, V. tibeta (modified from Xu and Yu, 2012); I, V. umbrabdomina (modified from Xu and Yu, 2012).

4

return to couplet #3

In profile view, petiolar node dome-like or roughly triangular, dorsum roundly convex, without distinctly differentiated dorsal face (Fig. 3F) => 5
In profile view, petiolar node roughly trapezoidal, with distinctly differentiated dorsal face, anterodorsal and posterodorsal corners more or

less distinct (Fig. 3G) => 12

Jeenthong et al. (2023), Fig. 3. Vombisidris spp. A, V. bilongrudi (CASENT0901985, paratype worker); B, V. acherdos (CASENT0178734, paratype worker); C, V. occidua (CASENT0901990, holotype worker); D, V. philax (ASENT0178736, paratype worker); E, V. philippina (CASENT0919713, paratype worker); F, V. regina (CASENT0102595, paratype worker); G, V. lochme (CASENT0901987, holotype worker); H, V. tibeta (modified from Xu and Yu, 2012); I, V. umbrabdomina (modified from Xu and Yu, 2012).

5

return to couplet #4

In profile view, metanotal groove shallow but obviously depressed => 6
In profile view, metanotal groove entirely absent => 7

6

return to couplet #5

In full-face view, posterior margin of head weakly concave; anterior clypeal margin strongly convex; in profile view, propodeal spines

weakly curved down, longer than propodeal dorsum; postpetiolar node evenly convex (Fig. 3H) (China: Tibet) => Vombisidris tibeta

In full-face view, posterior margin of head weakly convex; anterior clypeal margin weakly convex; in profile view, propodeal spines

straight, as long as propodeal dorsum; postpetiolar node strongly convex (Fig. 3I) (China: Hunan Province) => Vombisidris umbrabdomina

Jeenthong et al. (2023), Fig. 3. Vombisidris spp. A, V. bilongrudi (CASENT0901985, paratype worker); B, V. acherdos (CASENT0178734, paratype worker); C, V. occidua (CASENT0901990, holotype worker); D, V. philax (ASENT0178736, paratype worker); E, V. philippina (CASENT0919713, paratype worker); F, V. regina (CASENT0102595, paratype worker); G, V. lochme (CASENT0901987, holotype worker); H, V. tibeta (modified from Xu and Yu, 2012); I, V. umbrabdomina (modified from Xu and Yu, 2012).

7

return to couplet #5

In profile view, petiolar node roughly triangular, dorsal corner distinct (Fig. 4A) => 8
In profile view, petiolar node dome-like, dorsal corner indistinct (Fig. 4B) => 9

8

return to couplet #7

In profile view, propodeal spines about as long as propodeal declivity; postpetiolar node evenly convex; in dorsal view, lateral sides of

petiolar node convex; head and mesosoma blackish brown, gaster lighter brown (India) => Vombisidris occidua

Head of Vombisidris occidua worker

Profile of Vombisidris occidua worker

In profile view, propodeal spines distinctly longer than propodeal declivity; postpetiolar node strongly convex; in dorsal view, lateral sides

of petiolar node almost straight; head and mesosoma yellowish brown, gaster blackish brown (India) => Vombisidris humboldticola

9

return to couplet #7

In profile view, petiole peduncle longer than petiolar node (Fig. 4C) => 10
In profile view, petiole peduncle as long as or shorter than petiolar node (Fig. 4D) => 11

Jeenthong et al. (2023), Fig. 4. Vombisidris spp. A, V. occidua, (CASENT0901990, holotype worker); B, F, V. nahet, (CASENT0178735, paratype worker); C, E, V. satunensis (THNHM-I-00000246, holotype worker); D, V. regina (CASENT0102595, holotype worker); G, V. xylochos (CASENT0901986, holotype worker); H, V. lochme (CASENT0901987, holotype worker).

10

return to couplet #9

In profile view, propodeal spine short and straight (Fig. 4E); smaller species (HW 0.56–0.63) => Vombisidris satunensis

Jeenthong et al. (2023), Fig. 1. Vombisidris satunensis (holotype worker, THNHM-I-00000246). A, Head in frontal view; B, body in dorsal view; C, body in profile.

In profile view, propodeal spine long and distinctly downcurved (Fig. 4F); larger species (HW 0.63–0.71 mm) => Vombisidris nahet

Head of Vombisidris nahet worker

Profile of Vombisidris nahet worker

Jeenthong et al. (2023), Fig. 4. Vombisidris spp. A, V. occidua, (CASENT0901990, holotype worker); B, F, V. nahet, (CASENT0178735, paratype worker); C, E, V. satunensis (THNHM-I-00000246, holotype worker); D, V. regina (CASENT0102595, holotype worker); G, V. xylochos (CASENT0901986, holotype worker); H, V. lochme (CASENT0901987, holotype worker).

11

return to couplet #9

Entire body black to dark brown; larger species (HW 0.88–0.96 mm) => Vombisidris regina

Vombisidris regina

Entire body yellow; smaller species (HW 0.56–0.63 mm) => Vombisidris freyae

12

{{Return to|5}

In profile view, metanotal groove strongly depressed and trenchlike => 13
In profile view, metanotal groove vestigial to absent, without a trench-like notch => 15

13

return to couplet #12

In profile view, promesonotum nearly straight, anterodorsal corner angled; propodeal spine about two times as long as propodeal dorsum

(Fig. 4G) (Brunei) => Vombisidris xylochos

Head of Vombisidris xylochos worker

Profile of Vombisidris xylochos worker

In profile view, promesonotum weakly convex, anterodorsal corner rounded; propodeal spine about as long as propodeal dorsum (Fig. 4H) => 14

Jeenthong et al. (2023), Fig. 4. Vombisidris spp. A, V. occidua, (CASENT0901990, holotype worker); B, F, V. nahet, (CASENT0178735, paratype worker); C, E, V. satunensis (THNHM-I-00000246, holotype worker); D, V. regina (CASENT0102595, holotype worker); G, V. xylochos (CASENT0901986, holotype worker); H, V. lochme (CASENT0901987, holotype worker).

14

return to couplet #13

In full-face view, lateral sides of head divergent behind eyes; in profile view, anterior peduncle shorter than dorsal face of petiolar node;

first gastral tergite finely superficially reticulate (Fig. 5A) (Indonesia) => Vombisidris lochme

Head of Vombisidris lochme worker

Profile of Vombisidris lochme worker

In full-face view, lateral sides of head nearly parallel behind eyes; in profile view, anterior peduncle about as long as the dorsal face of

petiolar node; first gastral tergite almost completely smooth (Fig. 5B) (Malaysia) => Vombisidris dryas

Head of Vombisidris dryas worker

Profile of Vombisidris dryas worker

15

return to couplet #12

In profile view, petiole peduncle relatively short, shorter than dorsal face of petiolar node, the dorsal face nearly straight (Fig. 5C)

(Malaysia) => Vombisidris harpeza

Head of Vombisidris harpeza worker

Profile of Vombisidris harpeza worker

In profile view, petiole peduncle relatively long, about as long as the dorsal face of petiolar node, the dorsal face weakly convex (Fig. 5D) => 16

Jeenthong et al. (2023), Fig. 5. Vombisidris spp. A, V. lochme (CASENT0901987, holotype worker); B, V. dryas (CASENT0901988, holotype worker); C, V. harpeza (CASENT0901989, holotype worker); D, V. renateae (CASENT0901993, paratype worker); E, V. jacobsoni (CASENT0904730, paralectotype worker); F, V. philippina (CASENT0919713, paratype worker).

16

return to couplet #15

In profile view, anterodorsal corner of petiolar node bluntly angled, higher than posterodorsal corner, the latter rounded => 17
In profile view, both anterodorsal and posterodorsal corners of petiolar node bluntly prominent, at the same level => 18

17

return to couplet #16

In full-face view, posterior margin of head straight; in profile view, propodeal spines relatively short, shorter than or about as long as

propodeal declivity; ventral face of petiole nearly straight; dorsal surface of mesosoma with short blunt hairs (Australia) => Vombisidris australis

In full-face view, posterior margin of head evenly convex; in profile view, propodeal spines relatively long, longer than propodeal declivity;

ventral face of petiole concave; dorsal surface of mesosoma with moderate long tapered hairs (Australia) => Vombisidris renateae

Head of Vombisidris renateae worker

Profile of Vombisidris renateae worker

18

return to couplet #16

In full-face view, posterior margin of head nearly straight; anterior clypeal margin weakly convex; dorsal surface of mesosoma with short

blunt hairs; color yellow to lighter brown (Fig. 5E) (Indonesia) => Vombisidris jacobsoni

In full-face view, posterior margin of head weakly convex; anterior clypeal margin strongly convex; dorsal surface of mesosoma with

moderate long tapered hairs; color blackish brown (Fig. 5F) (Philippines) => Vombisidris philippina

Jeenthong et al. (2023), Fig. 5. Vombisidris spp. A, V. lochme (CASENT0901987, holotype worker); B, V. dryas (CASENT0901988, holotype worker); C, V. harpeza (CASENT0901989, holotype worker); D, V. renateae (CASENT0901993, paratype worker); E, V. jacobsoni (CASENT0904730, paralectotype worker); F, V. philippina (CASENT0919713, paratype worker).

References