The Ants of Africa
Genus Leptogenys
Leptogenys occidentalis Bernard

Leptogenys occidentalis Bernard

return to key {link to the Hymenoptera Name Server} Type location Guinea (Leptogenys nitida r. occidentalis, Bernard, 1952: 211, illustrated, worker) - see below; raised to species
junior synonym bernardi (replacement name for Leptogenys ferrarii r. sulcinodis Bernard; assigned by Baroni Urbani, 1971b)
worker only described (as in Bolton,1995) .


{Leptogenys comparisons}{Leptogenys occidentalis}Bolton's modern description (1975a) is at {original description}.

WORKER - TL 4.5-4.6 mm; upper halves of sides of petiole longitudinally sulcate. Pronotum unsculptured apart from hair-pits. Occipital margin in full-face view concave (Bolton, 1975a: 270, illustrated, full face view).

Note, however, this is not as defined in Bolton (1975a) - who has the holotype denoted as being of "L. ferrarii subsp. sulcinodis Bernard, 1952"; and the "L. nitida subsp. occidentalis Bernard, 1952" specimens as syntype workers.

Without seeking to pass judgement on Bolton's synonymy, Bernard's actual records and comments translate as follows:-
L. ferrarii Forel, race sulcinodis n.sbsp - one worker from station B1 28, ravine I, Mount Tô (Lamotte) - very close to ferrarii from Rhodesia, especially race dentulata Santschi (note Santschi's spelling was dentatula), from Belgian Congo; separated by :- TL 4.3 vs 5.0 (typical ferrarrii). Head colour black and antennae as dentulata. Head with serrated denticulation clearly visible (scarcely visible in dentulata, simply puncturate in ferrarii). Pro- and mesonotum slender, with sparse rugae (other forms rugulate or shagreened). Petiole node more elevated and more angular than the other forms Propodeum with large oblique rugae, particularly on the sides (others with rugae short and incomplete). Petiole node with strong longitudinal rugae (smooth or simply puncturate in others).
L. (Lobopelta) nitida F. Smith, race occidentalis n.sbsp - 3 workers from B2.41, ravine I, Mount Tô. Length, antennae, colour and clypeus identical to the typical L. nitida [TL 4.6-5.7] from Natal but differing from that (with 4 varieties, known from the Cape to Congo) by; pro- and mesonotum striated, with puncturations on the disc (other forms smooth); sides of propodeum with strong longitudinal rugae, less marked on upper part, similar rugae on the sides of the petiole node, which is stouter and more angular than sulcinodis - nitida and its varieties have the node and medial segment entirely smooth.

Clearly the latter with sculpturation on the pronotum does not match Bolton's criterion of "Pronotum unsculptured" and the synonymy needs to be re-examined, especially as the species name occidentalis stems from the anomalous "syntype workers" (as defined by Bolton).


{Leptogenys occidentalis}The photomontage of a syntype worker is collated from http://www.antweb.org/specimen.do?name=casent0902600

The holotype can be seen at http://www.antweb.org/specimenImages.do?code=casent0915464
The type of bernardi can be seen at http://www.antweb.org/specimenImages.do?code=casent0915463


Oxford University Museum specimens

Leptogenys occidentalis
B Taylor det.
Liberia
E Poirier
Liabala
PF 10
2.iv.2013
Nimba County
07°31’06" N
08°35’34" E
Pitfall trap
Secondary forest
473 m asl

2
{album}

{Leptogenys occidentalis}The photomontage is of a worker from Liberia, Liabala; collector E Poiriet (Liabala PF 7).

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© 2007, 2013, 2015 - Brian Taylor CBiol FSB FRES
11, Grazingfield, Wilford, Nottingham, NG11 7FN, U.K.

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