The Ants of
Africa Genus Tetramorium species-groups - Part 4 |
|
Tetramorium Introduction |
DIV3 SD2
Species groups - Part 4 - former Tetramorium
(Tetramorium)
species with short antennal scapes and small eyes or larger
eyes and squamiform petioles
DIV3 12-segmented antennae (Tetramorium) |
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Scape index < 100 (scape shorter than head width; usually does not reach occiput) | |||
TD3 Eyes very small to minute; width less than
maximum width of scape Otherwise tertiary division |
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shilohense-group | Diameter of eye usually < 0.17 X HW | ||
Complex-1 | With bizarre pilosity and irregular outline to alitrunk | ||
26 | Dorsum
of head between frontal carinae with 3-5 very coarse rugae; flattened
hairs on gaster scale-like; TL 3.1-3.5 mm; uniform brown |
. | . |
. | Tetramorium diomandei | Ivory Coast | |
26 | Dorsum of head between frontal
carinae with 9-12 fine rugae; flattened hairs on gaster long and
spatulate; TL 3.1-3.4 mm; reddish brown |
. | . |
. | Tetramorium somniculosum | Mozambique | |
Complex-2 | Without bizarre pilosity and irregular outline to alitrunk | ||
83 & 104 | Dorsum
of alitrunk gaster with abundant fine erect pilosity; TL 2.8-3.1 mm;
uniform yellow |
. | . |
. | Tetramorium intonsum | West Africa | |
- | Dorsum of alitrunk gaster with spaced out relatively elongate and stout erect pilosity | ||
105 | Pronotal dorsum regularly
longitudinally rugulose; TL 2.4-2.8 mm; uniform yellow to
yellowish-brown |
Tetramorium shilohense | southern East Africa |
106 | Pronotal
dorsum rugoreticulate or irregularly rugose; sides of head
reticulate-rugose; TL 2.2-2.6 mm; yellow tinged with brown |
. | . |
. | Tetramorium jugatum | West Africa and Angola | |
106 | Pronotal dorsum rugoreticulate or
irregularly rugose; sides of head punctulate or granular; head
relatively large; TL 2.5-2.8 mm; yellow |
Tetramorium termitobium | Congo Basin |
Complex-3 | Irregular outline to alitrunk but eye reduced to a single facet and frontal carinae very feeble | ||
109 | Dorsal
alitrunk sculptured; TL 2.4 mm; uniform yellow |
Tetramorium dysderke | Nigeria |
Complex-4 | Reduced sculpturation, eye reduced to 1-5 ommatidia and frontal carinae vestigial | ||
108 | Eye with 3-4 ommatidia; TL
2.6-3.1 mm; yellow |
. | . |
. | Tetramorium amaurum | Zimbabwe | |
111 | Eye
of single ommatidium; lateral clypeus strongly raised; TL 2.1-2.3 mm;
uniform clear pale yellow |
. | . |
. | Tetramorium warreni | South Africa | |
111 | Position of eye marked by a small
dark patch; lateral clypeus low and not raised; TL 2.0-2.1 mm; uniform
clear pale yellow |
. | . |
. | Tetramorium typhlops | Ivory Coast | |
112 | Eye
of a single ommatidium; mandibles feebly sculptured; TL 2.4-3.0 mm;
yellow |
. | . |
. | Tetramorium subcoecum | Southern East Africa | |
112 | Eye of two ommatidia; mandibles
strongly striate; TL 2.8-3.0 mm; yellow |
. | . |
<. | Tetramorium traegaordhi | South Africa & Congo Basin |
TD4 Eyes larger > 0.20 X HW, wider than maximum width of scape | |||
QD1 Petiole and sometimes postpetiole squamiform Otherwise quarternary division |
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squaminode-group | - | ||
Complex-1 | Eyes set well back on head | ||
45 | Alitrunk
dorsum finely and predominantly longitudinally rugose; TL 3.0-3.4 mm;
glossy mid-brown, gaster darker |
. | . |
. | Tetramorium repentinum | Zimbabwe | |
45 | Alitrunk dorsum coarsely
rugo-reticulate; TL 3.3-3.6 mm; uniform dark brown |
Tetramorium sitefrum | Ghana |
Complex-2 | Eyes about midlength of head | ||
46 | Pronotum
and mandibles smooth; no hairs on first gastral tergite; TL 2.5-2.6 mm;
uniform
brown, appendages lighter |
. | . |
. | Tetramorium matopoense | Zimbabwe | |
- | Strongly
sculptured, mandibles striated Otherwise |
||
- | Pronotum dorsum sculptured, first gastral tergite with hairs | ||
47 | First gastral tergite with
conspicuous basal costulae; dorsum of head completely rugo-reticulate;
TL 2.8-3.2 mm; yellow, gaster darker |
. | . |
. | Tetramorium umtaliense | Zimbabwe | |
- | First gastral tergite without basal costulae; dorsum of head rugulose | ||
49 | Petiole
with distinct transverse sharp transverse crest; TL 3.3-3.9 mm; brown |
. | . |
. |
|
Tetramorium squaminode | Tanzania |
- | Petiole with rounded apex | ||
52 | Postpetiole very broad and with
weak sculpturation; TL 3.3 mm; mid-brown, head and gaster darker |
. | . |
. | Tetramorium platynode | South Africa | |
53 | Postpetiole
not so broad and unsculptured; dorsum of head finely reticulate; TL 2.5
mm; yellow brown, appendages and underside of gaster lighter - the
Tanzania specimens differ slightly |
. | . |
. | Tetramorium dogieli | Kenya & Tanzania | |
53 | Postpetiole not so broad and
unsculptured; dorsum of head longitudinally rugose; TL 3.2-3.4 mm; dark
brown, gaster darker |
. | |
. | Tetramorium nube | South Sudan | |
- | Less strongly sculptured, mandibles smooth | ||
48 | First
gastral tergite with dense, long sharp hairs; TL 3.7-4.0 mm; dark brown
to blackish |
. | |
. | Tetramorium akermani | southern Africa | |
- | First gastral tergite with short stout hairs, generally sparse | ||
50 | Postpetiole strongly compressed
in profile, as squamate as petiole; TL 3.0-3.2 mm; mid-brown, gaster
darker |
. | . |
. | Tetramorium do | Zimbabwe | |
- | Postpetiole not strongly compressed in profile and differing from petiole | ||
54 | Eyes
relatively small, < 0.24 X HW; dorsum of head strongly
longitudinally rugose; TL 2.7-4.0 mm; uniform light brown |
Tetramorium frigidum | South Africa |
55 | Eyes larger, > 0.26 X HW;
dorsum of head weakly sculptured; frontal carinae wide apart,
postpetiole node somewhat compressed; TL 2.4-3.2 mm; yellowish-brown,
gaster much darker |
Tetramorium flaviceps | Zimbabwe |
55 | Eyes
larger, > 0.26 X HW; dorsum of head weakly sculptured; frontal
carinae closer together; postpetiole node low and rounded; TL 2.7-3.2
mm; uniform pale yellow |
. | . |
. | Tetramorium jejunum | Zimbabwe | |
© 2007, 2008, 2010, 2011, 2013, 2014 - Brian Taylor CBiol
FSB FRES 11, Grazingfield, Wilford, Nottingham, NG11 7FN, U.K. |
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