Polyrhachis concava André
  Type location Sierra
Leone (Polyrhachis concava
nov. sp., André, 1889: 218, worker; André, 1892a: 45, queen) collector
Mocquerys - see below
Bolton (1973b: 299, illustrated, full-face view, alitrunk profile,
anterior
petiole); see Bolton, 1995)  .
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Andre's (1889) description is at  . Bolton's modern description (1973b) is at
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 Nigeria
specimen (Taylor, 1978: 17). WORKER - TL 6.8-7.6 mm, HL 1.85-1.92, HW
1.29-1.30, SL 2.29-2.40, PW 1.00-1.18
Erect hairs only on the anterior clypeal margin and apex of the gaster.
Pubescence yellowish to pale golden, densest on the alitrunk. The side
view of the eye is unique in that the ventral margin is raised and
extended giving the eye a reniform (kidney-shaped) outline. Anterior
margin of clypeus arcuate and entire. Dorsum of alitrunk transversely
concave especially the propodeum. Alitrunk marginate throughout its
length, interrupted only at the sutures, the marginations projecting
and flange-like. Pronotum with a pair of spines and the propodeum with
a pair of, usually small, upcurved teeth. Anterior face of first
gastral segment vertical and not convex in the middle.
Collected by me from shrub vegetation at the Cocoa Research Institute
of Nigeria, Idi Ayunre; the first Nigerian record.
Rigato (2016) added:
IVORY COAST: Abidjan, 17.vi.1958 (E.S. Ross & R.E. Leech) (1 g, 1 w, CAS).
EQUAT. GUINEA: Fernando Poo [currently Bioko], Punta Frailes, x–xi.1901 (L. Fea) (1 w, MSNG).
CENTRAL AFRICAN REP.: P.N. Dzanga–Ndoki, 21.4 km 53° NE Bayanga,
3°02.01’N 16°24.57’E, 510 m, 6.v.2001 (S. van Noort) (1 w, CAS:
CASENT0089415 CAR01-S49); Res. Dzanga–Sangha, 12.7 km 326° NW Bayanga,
3°00.27’N 16°11.55’E, 420 m, 15–16.v.2001 (S. van Noort) (1 g, CAS:
CASENT0088637 CAR01-M135); P.N. Dzanga–Ndoki, 38.6 km 173° S Lidjombo,
2°21.60’N 16°03.20’E, 350 m, 21–27.v.2001 (S. van Noort) (1 w, CAS:
CASENT0094433 CAR01-
Y70); P.N. Dzanga–Ndoki, 38.6 km 173° S Lidjombo, 2°21.60’N 16°03.20’E,
350 m, 22.v.2001 (S. van Noort) (5 w, CAS: CASENT0092209 CAR01-S201,
CASENT0092238 CAR01-S203, CASENT0092328 CAR01-S210, CASENT0092336
CAR01-S211, CASENT0092571 CAR01-S229); P.N. Dzanga–Ndoki, 38.6 km 173°
S Lidjombo, 2°21.60’N 16°03.20’E, 350 m, 22–23.v.2001 (S. van Noort) (1
w, CAS: CASENT0086392 CAR01-M187).
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 The
photomontage of a cotype worker is collated from http://www.antweb.org/specimen.do?name=CASENT0910903.
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Wheeler
(1922) listed findings from Cameroun (by H. Brauns, at Mundame
by Conradt, at Bibundi by Tessmann, and at Yaoundé by Zenker); also
others from Congo and Zaïre. Forel (1911f) found
specimens in the Congo Museum from Zaïre, Congo da Lemba, by
Mayné.
Other collections from Ghana, at CRIG (B.
Bolton), and Atewa Forest Reserve (D. Leston); Cameroun (no
details); Gabon, Zaïre and Congo (Bolton, 1973b).
Bernard (1952, not referred to by Bolton, 1973b)
described it as a slender ant, rare in collections, known from Sierra
Leone, Cameroun and Congo. In Guinea it was found at Nion (1
worker), Kéoulenta (2 workers), Camp IV, 1000 m (5 workers); specimens
with a golden pubescence on the thorax.
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Oxford University Museum
specimens
Polyrhachis concava
B Taylor det. |
Benin
S Tchibozo
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29.i.2007
06°55’03.7 N
02°24’44.6 E
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Forêt de
Gnanhouizoumè
Forêt fourmis (forest ants)
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2
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Polyrhachis concava
B Taylor det. |
Benin
S Tchibozo
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28.ii.2007
06°55’32.8 N
02°29’13 E
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Forêt de Gbèvozoumè
Lisière fourmis (forest edge/ border ants)
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1
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Polyrhachis concava
B Taylor det.
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Gabon
Y Braet
Gabon 98
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8.viii.2006
Pongara
00°34' N
09°19' E
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Edge of savannah;
yellow tray trap
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1
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Polyrhachis concava
B Taylor det.
Male
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Central African
Republic
P Annoyer
HS
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10.x.2008
Dzanga-Sangha
03°06'14.6" N
16°08'52.1" E
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493 m; Camp de
transit 2; 18h30-3h;
Au dessus d'une chute d'eau (ruisseau Songo 1) à proximité du camp
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1
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Polyrhachis concava
B Taylor det.
Queen
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Central African
Republic
P Annoyer
KK
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22.x.2008
Dzanga-Sangha
03°01'49.5" N
16°08'31.7" E
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567 m; Camp 2;
9h-14h vers ancienne saline du camp vers une ancienne saline
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1
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 The
photomontage is of a (somewhat dirty) specimen from Gabon,
Pongara NP, edge of savannah, 8.viii.2006, collected by Yves Braet
(Gabon 98).
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 The
photomontage is of worker from Benin; Collection
details: Forêt de Gnanhouizoumè; 06°55’03.7 N 02°24’44.6 E);
29.i.2007; Forêt fourmis (forest ants); collector S Tchibozo.
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 The photomontage is of
a queen from the Central
African Republic, Dzanga-Sangha Nature Reserve; collector
Philippe Annoyer (CAR KK).
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 The photomontage is of
a male from the Central African
Republic, Dzanga-Sangha Nature Reserve, collector Philippe
Annoyer (CAR HS).
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