Key to Afrotropical Tetramorium shiloense species group

AntWiki - Where Ant Biologists Share Their Knowledge
Jump to navigation Jump to search

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

You may also be interested in


NOTES:

1

  • Dorsal surface of mesosoma without standing setae . . . . . 2
  • Dorsal surface of mesosoma with standing setae, which are longer than broad, usually numerous and simple . . . . . 3

2

return to couplet #1

  • Dorsum of head between fornal carinae with 3-5 very coarse rugae. Mesosoma profile as is figure. Squamate appresed setae on first gastral tergite short and broad, the pubescence between them sparse, short and inconspicuous ..... Tetramorium diomandei
Tetramorium diomandei casent0901166 p 1 high.jpg
Tetramorium diomandei casent0901166 d 1 high.jpg
  • Dorsum of head between fornal carinae with 9-12 fine rugae. Mesosoma profile as is figure. Squamate appresed setae on first gastral tergite elongate and narrow, the pubescence between them sparse, but long and distinct ..... Tetramorium somniculosum
Tetramorium somniculosum casent0901172 p 1 high.jpg
Tetramorium somniculosum casent0901172 d 1 high.jpg

3

return to couplet #1

  • Frontal carinae distinct, extending back well beyond the level of the eyes. Pronotal dorsum with rugose sculpture, either longitudinal or reticulate . . . . . 4
  • Frontal carinae short and feeble or absent. If the frontal carinae approach the level of the eyes then the pronotal lacks rugose sculpture . . . . . 7

4

return to couplet #3

  • Pilosity of dorsal mesosoma and first gastral tergite fine and abundant, forming a dense pelt on their surfaces. With the head in full face view the sides behind the eyes with numerous outstanding setae, always obviously >10, usually too numerous to count easily. Pubescence of scapes and hind tibiae not reclinate. Antennal scapes with SI 93-99 ..... Tetramorium intonsum
Tetramorium intonsum casent0901168 p 1 high.jpg
Tetramorium intonsum casent0901168 d 1 high.jpg
  • Pilosity of dorsal mesosoma and first gastral tergite elongate and quite stout, the setae spaced out and not forming a dense pelt on their surfaces. With the head in full face view the sides behind the eyes with few outstanding setae, 10 at most being present, usually less. Pubescence of scapes and hind tibiae reclinate, decumbent to appresed. Antennal scapes with SI 79-93 . . . . . 5

5

return to couplet #4

  • Pronotal dorsum quite regularly longitudinally rugose, with few or no cross meshes ..... Tetramorium shilohense
Tetramorium shilohense casent0901171 p 1 high.jpg
Tetramorium shilohense casent0901171 d 1 high.jpg
  • Pronotal dorsum with a rugoreticulum or very irregularly rugulose . . . . . 6

6

return to couplet #5

  • Sides of head above and behind the eyes predominantly reticulate-rugose. Area of head between frontal carinae with 3-4 strong rugae present in front of the level of the eyes, these rugae stronger than the remaining cephalic structure. CI<90 , SI 86-93 ..... Tetramorium jugatum
Tetramorium jugatum casent0901169 p 1 high.jpg
Tetramorium jugatum casent0901169 d 1 high.jpg
  • Sides of head above and behind the eyes predominantly punctulate or granular, with only feeble sparse rugulae. Area of head between frontal carinae without 3-4 strong rugae stronger than the remaining cephalic structure. CI>90 , SI 81-83 ..... Tetramorium termitobium
Tetramorium termitobium casent0280902 p 1 high.jpg
Tetramorium termitobium casent0280902 d 1 high.jpg

8

return to couplet #6

  • Eyes with 3 or more ommatidia ..... . . . . . 9
  • Eyes with only 1 or 2 facets or consisting only of a discoloured patch on side of head . . . . . 9

9

return to couplet #8

  • Anterior clypeal margin notched or impressed medially. Propodeum with a pair of triangular teeth. Eyes with 3-5 ommatidia. Larger species with HW 0.60-0.66 .....Tetramorium amaurum
Tetramorium amaurum P casent0901161.jpg
Tetramorium amaurum D casent0901161.jpg
  • Anterior clypeal margin entire. Propodeum with a pair of minute denticles. Eyes with more than 6 ommatidia. Smaller species with HW 0.48-0.52 .....Tetramorium pauper
Tetramorium pauper casent0280855 p 1 high.jpg
Tetramorium pauper casent0280855 d 1 high.jpg

9

return to couplet #7

  • Dorsal mesosoma sculptured, the promesonotum with distinct, predominantly longitudinal rugulation ..... Tetramorium dysderke
Tetramorium dysderke casent0901167 p 1 high.jpg
Tetramorium dysderke casent0901167 d 1 high.jpg
  • Dorsal mesosoma unsculptured, the promesonotum smooth and shining or at most with extremely faint vestiges of superficial punctuation in places . . . . . 10

10

return to couplet #9

  • Minute species HW <0.50, SL <0.35, scapes short, SI 68-71 . . . . . 11
  • Larger species HW >0.50, SL >0.40, scapes longer, SI 75-81 . . . . . 12

11

return to couplet #10

  • Eyes composed of a single distinct ommatidium. Lateral portions of clypeus strongly raised in front of antennal insertions, markedly convex above ..... Tetramorium warreni
Tetramorium warreni casent0280903 p 1 high.jpg
Tetramorium warreni casent0280903 d 1 high.jpg
  • Eyes merely a discoloured patch on side of the head. Lateral portions of clypeus low in front of antennal insertions, not convex above ..... Tetramorium typhlops
Tetramorium typhlops casent0901174 p 1 high.jpg
Tetramorium typhlops casent0901174 d 1 high.jpg

12

return to couplet #10

  • Eyes composed of a single distinct ommatidium. Mandibles feebly sculptured. Anterior clypeal margin with a strong median notch or impression ..... Tetramorium subcoecum
Tetramorium subcoecum casent0217079 p 1 high.jpg
Tetramorium subcoecum casent0217079 d 1 high.jpg
  • Eyes with two ommatidia. Mandibles strongly longitudinatelly striate. Anterior clypeal margin at most with a feeble median indentation, difficult to see ..... Tetramorium traegaordhi
Tetramorium traegaordhi casent0249034 p 1 high.jpg
Tetramorium traegaordhi casent0249034 d 1 high.jpg

References

<References>