The Ants of Africa
Genus Crematogaster
Crematogaster (Crematogaster) excisa Mayr

Crematogaster (Crematogaster) excisa Mayr

return to key {link to the Hymenoptera Name Server} Type location Congo (Cremastogaster excisa nov. spec., Mayr, 1895: 139, worker) - no images on Antweb (December 2014)
subspecies
bomaella (Crematogaster (Acrocoelia) excisa Mayr stirps bomaella n. var., Santschi, 1935a: 258, see below) from Zaïre - see http://www.antweb.org/specimenImages.do?code=casent0912668
cavinota (Cremastogaster excisa Mayr r. cavinota n. stirps, Stitz, 1916: 385, illustrated, worker) from Central Africa Republic, between Fort de Possel and Fort Crampel, by Schubotz (not "Congo" as given in Bolton, 1995) - no images on Antweb (December 2014)
lacustris (Cremastogaster excisa stirps lacustris nov., Santschi, 1914b: 99, worker) from Tanzania, Lusinga Island, Lake Victoria, x.1903 - http://ww.antweb.org/specimenImages.do?code=casent0915373
worker only described (see Bolton, 1995) .

Also originally described as a variety of excisa was maledicta (Cremastogaster excisa Mayr v. maledicta n.v., Forel, 1914d: 236, worker & queen) from Zimbabwe; Santschi (1920b: 15) placed it as a variety of sjostedti, which in turn he listed, without giving any justification, as a stirps of gerstaeckeri (Santschi, 1930b), which is where it remains in Bolton (1995: 157). Assuming, however, that Arnold (1920a: 502) gave a sound translation and his illustration (right) was correct, there seems good reason to place it back here as a subspecies of excisa. The Antweb photographs (below) of a syntype maledicta confirm this view.


{Crematogaster excisa maledicta}Mayr's (1895) description is at {original description}. Forel's (1914d) description of maledicta is at {original description}. Arnold (1920a: 501) gave a translation, this is at {original description}. Santschi's (1914b) description of lacustris is at {original description}. Stitz's (1916) description of cavinota is at {original description}. Arnold (1920a: 501) gave a translation of maledicta, this is at {original description}. Santschi's (1935a) description of bomaella is at {original description}.


{Crematogaster (Cr.) sp T1}Nigeria specimens (Crematogaster (Crematogaster) species T¹, Taylor, 1979: 27)

TL variable 2.18-2.64 mm. Largest HL 0.70, HW 0.70, SL 0.56, PW 0.40

Colour medium-dark brown, shiny. Lateral alitrunk very faintly striate. Pilosity sparse, few erect hairs. Alitrunk profile a flattened convex curve with a slight depression at the metanotal groove. Propodeal spines halfway down the declivity, no more than sharp denticles. Subpetiolar spine small, acute and triangular.

In Nigeria I found it on cocoa and once nesting in dead wood on a garden tree.


{Crematogaster ecisa maledicta} The photomontage of a syntype worker of excisa maledicta is collated from http://www.antweb.org/specimen.do?name=casent0902106


Oxford University Museum specimens

Crematogaster (Crematogaster) excisa
B Taylor det.
Cameroun
A Fotso Kuate
Crematogaster sp10

22.i.2008
Awae II
03°54'30" N
11°25'58" E
Quadrat in fallow
2
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2667
18.iv.2012
Glo, F.E.A.
06°55'05'' N
02°32'06'' E
Mangifera indica orchard
cohabiting with Oecophylla longinoda

2
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2671
10.v.2012
Korobourou
09°22'13'' N
02°40'16'' E 
Mangifera indica orchard
weak antagonist of Oecophylla longinoda
nesting under bark
3
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2709
7.xii.2011
Glo, F.E.A.
06°55'05'' N
02°32'06'' E
Mangifera indica orchard 3
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2823
10.vi.2010
Koro
08°54'00'' N
02°34'00'' E
Mangifera indica orchard
CAF2/PFRS/T53 (nuit)
1
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2829
8.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT4/GFN/T59/Parcelle 2 (jour)
1
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2836
8.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T27/Parcelle 2 (nuit)
1
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2838
10.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T71/Parcelle 2 (jour)
1
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2843
7.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T23/Parcelle 2 (jour)
1
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2845
8.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T53/Parcelle 2 (jour)
1
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2846
10.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T68/Parcelle 2 (nuit)
1
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2847
10.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T55/Parcelle 2 (jour)   
1
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2855
8.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T55/Parcelle 2 (jour)
2
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2857
10.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T72/Parcelle 2 (jour)
2
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2858
7.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T57/Parcelle 2 (jour)
2
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2860
10.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T69/Parcelle 2 (jour)
2
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2869
15.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T80/Parcelle 2 (nuit)
1
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2870
15.vi.2010
Koro
09°22'21'' N
02°40'13'' E
Mangifera indica orchard
CAT2/PFRS/T72/Parcelle 2 (jour)
1
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2901
13.ix.2012
Korobourou
09°22'13'' N
02°40'16'' E
Mangifera indica orchard
Quadrat 3-1, tube 6, variété: ?
Arboreal
2
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2932
7.x.2012
Korobourou
09°22'13'' N
02°40'16'' E
Mangifera indica orchard
Quadrat 1, tube 1, variété: Kent
Arboreal
2
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2942
8.ix.2012
Korobourou
09°22'13'' N
02°40'16'' E 
Mangifera indica orchard
Quadrat 1, tube 3, variété: Gouverneur
Arboreal, nest in hollow branch
2
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2972
8.xi.2012
Koro
09°22'21'' N
02°40'13'' E
On Mangifera indica; Eldon T2-5
commensal with Oecophylla longinoda
nesting under bark
2
{album}
Crematogaster (Crematogaster) excisa
B Taylor det.
Benin
J-F Vayssieres
RVA 2973
8.xi.2012
Koro
09°22'21'' N
02°40'13'' E
On Mangifera indica; Eldon T2-6
commensal with Oecophylla longinoda
nesting under bark
2
{album}

Crematogaster excisa The photomontage is of a worker from Cameroun, Awae II; collector A Fotso Kuate (fk crematogaster sp 10).


Crematogaster excisa The photomontage is of a worker from Benin, Glo; collector J-F Vayssieres (RVA2667).


Crematogaster excisa The photomontage is of a worker from Benin, Glo; collector J-F Vayssieres (RVA2709).


{Crematogaster excisa cavinota}Wheeler (1922) listed excisa from Sierra Leone (without details), noting that in Zaïre the specimens had been collected from nests in a tree trunk and a hollow tree.

Santschi (1935a) also saw workers from Kunungu, Matadi, Boma and Kasai (Dumbi), Zaïre; adding that as with the type (specimens from Mayr) the propodeum was feebly but clearly longitudinally rugose; those he saw from Bas Congo were less strongly sculptured. His description of bomaella, from Boma (collected by Dr R. Schouteden, 8.ix.1920) was -
WORKER - TL 2.6-3.2 mm. Overall red brown; funiculus (other than the club), joints of legs and gaster (other than darker apex) clearer yellow brown. Head shiny and smooth, except for the genae, which have fine longitudinal striations. Thorax matt, finely reticulo-punctate with irregular elongated and anastomosed striations, stronger in large specimens. Sides of thorax with fine reticulation giving the appearance of longitudinal striae; sculpturation intermediate between excisa and andrei. Gaster smooth; with some erect translucent hairs, more numerous apically. Pilosity fine and spaced out on body and appendages. Head slightly larger than excisa, sides arcuate but with more convex, larger eyes. Clypeus smooth, almost flat and without a carina; anterior border as excisa in being slightly arcuate. Post-clypeal notch shallow (very marked in euphrosyne - a variety now excluded by Bolton, 1995). Scape reaching occipitum; funiculus segments 2-7 short, no longer than wide; club thick, with last segment slightly longer than wide. Pronotum laterally bordered, dorsal face flat (as excisa).
Mesonotum as wide as long, sides bordered with a sharp declivity posteriorly and lightly carinateed anteriorly. Propodeal spines divergent, as long as the propodeal dorsum, seen from above the space between the bases is rectilinear, the points of the spines slightly farther apart than the width of the pronotum. Petiole as wide as long, anterior angles rounded, sides feebly roughened. Postpetiole deeply incised. Overall resembling impressa ssp brazai but smaller and clearer, thorax more sculptured and propodeal spines more divergent; clypeus less convex. Differs from menilekii (as satanula) by the much finer sculpturation and shorter propodeal spines.

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© 2007, 2008, 2011, 2012, 2014 - Brian Taylor CBiol FSB FRES
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