Difference between revisions of "Key to Afrotropical Tetramorium squaminode species group"

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(Created page with "This worker key is based on Bolton (1980)<ref>Media:Bolton 1980.pdf| Bolton, B. 1980. The ant tribe Tetramoriini (Hymenoptera: Formicidae). The genus Tetramorium Mayr in the...")
 
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==2==
 
==2==
 
return to [[#1 |couplet #1]]
 
return to [[#1 |couplet #1]]
 
+
*Dorsal alitrunk coarsely reticulate-rugose ..... [[Tetramorium sitefrum]]
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{|
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|[[|thumb|220px|[[Tetramorium sitefrum]]'']]
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|[[|thumb|255px]]
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|[[|thumb|255px]]
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|}
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*Dorsal alitrunk finely and predominantly longitudinally rugose ..... [[Tetramorium repentinum]]
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{|
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|[[|thumb|220px|[[Tetramorium repentinum]]'']]
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|[[|thumb|255px]]
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|[[|thumb|255px]]
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|}
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==3==
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return to [[#1 |couplet #1]]
 +
*Promesonotal dorsum unsculptured. First gastral tergite without hairs ..... [[Tetramorium matopoense]]
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{|
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|[[|thumb|220px|[[Tetramorium matopoense]]'']]
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|[[|thumb|255px]]
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|[[|thumb|255px]]
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|}
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*Promesonotal dorsum sculptured. First gastral tergite with hairs [[#4|'''. . . . . 4''']]
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==4==
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return to [[#2 |couplet #3]]
 +
*First gastral tergite with short but conspicuous basigastral costulae. Dorsum of head reticulate-rugose from posterior clypeal margin to occipital margin..... [[Tetramorium umtaliense]]
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{|
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|[[|thumb|220px|[[Tetramorium umtaliense]]'']]
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|[[|thumb|255px]]
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|[[|thumb|255px]]
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|}
 +
*First gastral tergite smooth, without basigastral costulae. Dorsum of head predominantly or entirely longitudinally rugulose; rugoreticulum when present is confined to the area close to the occipital margin[[#5|'''. . . . . 5''']]
 +
==5==
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return to [[#4 |couplet #4]]
 +
*Hairs on first gastral tergite dense, long and very fine, acutely pointed apically ..... [[Tetramorium akermani]]
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{|
 +
|[[|thumb|220px|[[Tetramorium akermani]]'']]
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|[[|thumb|255px]]
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|[[|thumb|255px]]
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|}
 +
*Hairs on first gastral tergite short and stout, generally sparse and most or all of them blunt or truncated apically[[#6|'''. . . . . 6''']]
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==6==
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return to [[#5 |couplet #5]]
 +
*Dorsal transverse crest of petiole scale very thin and sharp, knife-edged ..... [[Tetramorium squaminode]]
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{|
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|[[|thumb|220px|[[Tetramorium squaminode]]'']]
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|[[|thumb|255px]]
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|[[|thumb|255px]]
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|}
 +
*Dorsal transverse crest of petiole scale blunt or narrowly rounded, not at all knife-edged [[#7|'''. . . . . 7''']]
 +
==7==
 +
return to [[#6 |couplet #6]]
 +
*Postpetiole strongly antero-posteriorly compressed, almost as strongly squamate as petiole. In dorsal view the surface of the postpetiole narrow from front to back and very broad..... [[Tetramorium do]]
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{|
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|[[|thumb|220px|[[Tetramorium do]]'']]
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|[[|thumb|255px]]
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|[[|thumb|255px]]
 +
|}
 +
*Postpetiole not or only slightly antero-posteriorly compressed, by no means as squamate as the petiole. In dorsal view the surface of the postpetiole broadly rounded from front to back [[#8|'''. . . . . 8''']]
 +
==8==
 +
return to [[#7 |couplet #7]]
 +
*Mandibles closely and coarsely longitudinally striate [[#9|'''. . . . . 9''']]
 +
*Mandibles smooth or at most with only vestigial sculpture [[#11|'''. . . . . 11''']]
 +
==9==
 +
return to [[#8 |couplet #8]]
 +
*Postpetiole weakly sculptured dorsally, more strongly so on the sides. Postpetiole very broad, its maximum width 0.45 in dorsal view, about 0.76 x PW..... [[Tetramorium platynode]]
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{|
 +
|[[|thumb|220px|[[Tetramorium platynode]]'']]
 +
|[[|thumb|255px]]
 +
|[[|thumb|255px]]
 +
|}
 +
*Postpetiole unsculptured and much narrower, its maximum width about 0·36 in dorsal view, approximately 0.66-0.68 x PW [[#10|'''. . . . . 10''']]
 +
==10==
 +
return to [[#1 |couplet #1]]
 +
*Dorsum of head between eyes and posterior extension of frontal carinae longitudinally rugulose. Larger species, TL 3.2 or more..... [[Tetramorium nube]]
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{|
 +
|[[|thumb|220px|[[Tetramorium nube]]'']]
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|[[|thumb|255px]]
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|[[|thumb|255px]]
 +
|}
 +
*Dorsum of head between eyes and posterior extension of frontal carinae finely reticulate. Smaller species, TL 2.5..... [[Tetramorium dogieli]]
 +
{|
 +
|[[|thumb|220px|[[Tetramorium dogieli]]'']]
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|[[|thumb|255px]]
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|[[|thumb|255px]]
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|}
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==11==
 +
return to [[#8 |couplet #8]]
 +
*Eyes relatively small, maximum diameter 0..22- 0.24 x HW. Dorsum of head with sharply defined dense longitudinal rugulae ..... [[Tetramorium frigidum]]
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{|
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|[[|thumb|220px|[[Tetramorium frigidum]]'']]
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|[[|thumb|255px]]
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|[[|thumb|255px]]
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|}
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*Eyes relatively larger, maximum diameter 0.26-0.29 x HW. Dorsum of head with poorly defined scattered, irregular longitudinal rugulae [[#12|'''. . . . . 12''']]
 +
==12==
 +
return to [[#11 |couplet #11]]
 +
*Frontal carinae closer together, their distance apart at level of midlength of eye 0.55-0.60 x HW. Node of postpetiole in profile low, broadly rounded and quite evenly convex. Uniform clear pale yellow species ..... [[Tetramorium jenunum]]
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{|
 +
|[[|thumb|220px|[[Tetramorium jenunum]]'']]
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|[[|thumb|255px]]
 +
|[[|thumb|255px]]
 +
|}
 +
*Frontal carinae wider apart, their distance apart at level of midlength of eye 0.64-0.70 x HW. Node of postpetiole somewhat compressed from front to back, in profile relatively high and narrowly rounded. Gaster dark brown to black, contrasting with yellow head and alitrunk..... [[Tetramorium flaviceps]]
 +
{|
 +
|[[|thumb|220px|[[Tetramorium flaviceps]]'']]
 +
|[[|thumb|255px]]
 +
|[[|thumb|255px]]
 +
|}
 
==References==
 
==References==
 
<References>
 
<References>
 
[[Category:Identification key|Tetramorium]][[Category:Tetramorium]][[Category:Afrotropical species identification keys|Tetramorium]]
 
[[Category:Identification key|Tetramorium]][[Category:Tetramorium]][[Category:Afrotropical species identification keys|Tetramorium]]

Revision as of 16:56, 19 February 2017

This worker key is based on Bolton (1980)[1]

You may also be interested in

..... Tetramorium

[[|thumb|220px|Tetramorium ]] [[|thumb|255px]] [[|thumb|255px]]

1

  • With the head in full-face view the eyes situated behind the midlength of the sides. Frontal carinae strongly divergent posteriorly, running in a nearly straight line to the occipital corners. Clypeus more or less flat, regularly sculptured. CI 97- 104 . . . . . 2 (repentinum) species complex
  • With the head in full-face view the eyes situated at or slightly in front of the midlength of the sides (Figs 35, 36). Frontal carinae distinctly sinuate. Clypeus convex, often irregularly sculptured. CI usually 86-95, rarely approaching 97 . . . . . 3 (squaminode) species complex

2

return to couplet #1

[[|thumb|220px|Tetramorium sitefrum]] [[|thumb|255px]] [[|thumb|255px]]
[[|thumb|220px|Tetramorium repentinum]] [[|thumb|255px]] [[|thumb|255px]]

3

return to couplet #1

[[|thumb|220px|Tetramorium matopoense]] [[|thumb|255px]] [[|thumb|255px]]
  • Promesonotal dorsum sculptured. First gastral tergite with hairs . . . . . 4

4

return to couplet #3

  • First gastral tergite with short but conspicuous basigastral costulae. Dorsum of head reticulate-rugose from posterior clypeal margin to occipital margin..... Tetramorium umtaliense
[[|thumb|220px|Tetramorium umtaliense]] [[|thumb|255px]] [[|thumb|255px]]
  • First gastral tergite smooth, without basigastral costulae. Dorsum of head predominantly or entirely longitudinally rugulose; rugoreticulum when present is confined to the area close to the occipital margin. . . . . 5

5

return to couplet #4

  • Hairs on first gastral tergite dense, long and very fine, acutely pointed apically ..... Tetramorium akermani
[[|thumb|220px|Tetramorium akermani]] [[|thumb|255px]] [[|thumb|255px]]
  • Hairs on first gastral tergite short and stout, generally sparse and most or all of them blunt or truncated apically. . . . . 6

6

return to couplet #5

[[|thumb|220px|Tetramorium squaminode]] [[|thumb|255px]] [[|thumb|255px]]
  • Dorsal transverse crest of petiole scale blunt or narrowly rounded, not at all knife-edged . . . . . 7

7

return to couplet #6

  • Postpetiole strongly antero-posteriorly compressed, almost as strongly squamate as petiole. In dorsal view the surface of the postpetiole narrow from front to back and very broad..... Tetramorium do
[[|thumb|220px|Tetramorium do]] [[|thumb|255px]] [[|thumb|255px]]
  • Postpetiole not or only slightly antero-posteriorly compressed, by no means as squamate as the petiole. In dorsal view the surface of the postpetiole broadly rounded from front to back . . . . . 8

8

return to couplet #7

  • Mandibles closely and coarsely longitudinally striate . . . . . 9
  • Mandibles smooth or at most with only vestigial sculpture . . . . . 11

9

return to couplet #8

  • Postpetiole weakly sculptured dorsally, more strongly so on the sides. Postpetiole very broad, its maximum width 0.45 in dorsal view, about 0.76 x PW..... Tetramorium platynode
[[|thumb|220px|Tetramorium platynode]] [[|thumb|255px]] [[|thumb|255px]]
  • Postpetiole unsculptured and much narrower, its maximum width about 0·36 in dorsal view, approximately 0.66-0.68 x PW . . . . . 10

10

return to couplet #1

  • Dorsum of head between eyes and posterior extension of frontal carinae longitudinally rugulose. Larger species, TL 3.2 or more..... Tetramorium nube
[[|thumb|220px|Tetramorium nube]] [[|thumb|255px]] [[|thumb|255px]]
  • Dorsum of head between eyes and posterior extension of frontal carinae finely reticulate. Smaller species, TL 2.5..... Tetramorium dogieli
[[|thumb|220px|Tetramorium dogieli]] [[|thumb|255px]] [[|thumb|255px]]

11

return to couplet #8

  • Eyes relatively small, maximum diameter 0..22- 0.24 x HW. Dorsum of head with sharply defined dense longitudinal rugulae ..... Tetramorium frigidum
[[|thumb|220px|Tetramorium frigidum]] [[|thumb|255px]] [[|thumb|255px]]
  • Eyes relatively larger, maximum diameter 0.26-0.29 x HW. Dorsum of head with poorly defined scattered, irregular longitudinal rugulae . . . . . 12

12

return to couplet #11

  • Frontal carinae closer together, their distance apart at level of midlength of eye 0.55-0.60 x HW. Node of postpetiole in profile low, broadly rounded and quite evenly convex. Uniform clear pale yellow species ..... Tetramorium jenunum
[[|thumb|220px|Tetramorium jenunum]] [[|thumb|255px]] [[|thumb|255px]]
  • Frontal carinae wider apart, their distance apart at level of midlength of eye 0.64-0.70 x HW. Node of postpetiole somewhat compressed from front to back, in profile relatively high and narrowly rounded. Gaster dark brown to black, contrasting with yellow head and alitrunk..... Tetramorium flaviceps
[[|thumb|220px|Tetramorium flaviceps]] [[|thumb|255px]] [[|thumb|255px]]

References

<References>