Dorylus (Anomma) titan Santschi
Type locality Zaïre
(Dorylus (Anomma) titan n.
1923e: 271, worker major) Kasai Kondué, E Luja
subspecies vinalli (D. (D.)
titans v. vinalli n.
var., Santschi, 1933b: 97, worker) from Zaïre, Haut Congo, Miss
soldier and worker
described (see Bolton, 1995) .
Santschi's (1923e) description is at and . Santschi's (1933b) description of vinalli
is at .
Described by Santschi (1923e) from Kondue, Zaïre
[Belgian Congo], collected by Luja. Raignier & van Boven (1955)
examined the type and found Santschi's description to be accurate:-
Major with head rectangular, sides more or less parallel with irregular
undulations; posterior angles extended as in opacus, Frontal
notch distinct on vertex, whereas it is vague in opacus, and
continuing up to the occiput as a brilliant, glabrous line; mandibles
longer, narrower and more slender than opacus; petiole a little
longer than wide and rounded posteriorly. Red wine colour; head matt
but with a silky reflection; totally lacking in opacus. In emery
the head is almost all shiny.
The variety vinalli was described by Santschi
(1933b) from four specimens from Basankusu, Bongandanga, Zaïre [Belgian
Congo], as having a sombre colour and more marked sculpturation.
Raignier & van Boven (1955) remarked that such simple variations
were not uncommon within single colonies of Anomma and this
variety might well be of no merit. Their attempt to compare gerstaeckeri,
titan and opacus (p 85) gives titan
as TL 9.1 and CI 92; clearly, they cannot have seen the very
distinctive true major (TL >14 mm, which is illustrated and
described here and matches the Santschi description).
photomontage of the type major worker is collated from http://www.antweb.org/specimen.do?name=casent0911320.
photomontage of the type minor worker (media 4?) is collated from http://www.antweb.org/specimen.do?name=casent0911321.
Oxford University Museum
|Dorylus (Anomma) titan
B Taylor det.
|Dorylus (Anomma) titan
B Taylor det.
A Fotso Kuate
|Pitfall in fallow
The photomontages are of specimens collected at Bossou,
south eastern Guinea by Tatyana Humle (Humle 4, 12.ix.2001).
The various morphs are shown in detail on Dorylus (Anomma) titan morphs
page, together with a media 1 of vinalli.
new description - Humle 4
Overall - matt, except shiny occiput dark brown head, alitrunk more
orange, extremities orange-brown
TL 14.25 HW 3.8 HL 4.25 HD 2.0 CI 89 SL 1.3 SI 31 AL 4.4 PW 1.9 PL 1.0
GL 4.6 MFL 2.6
Head - rectangular, very noticeably longer than wide, sides parallel
but with wavy or undulations notably just past the mid-point ;
posterior margin, shallow scallop with raised median area;
sculpturation densely spiculate, although near-effaced on vertex which
is shiny; median line variably visible for whole length of face, with
impressed areas after the clypeal notch, mid-face and on the occiput[
clypeal margin slightly sinuous with coarse moderately long median hair
and shorter lateral hairs; mandible short and stout, polished but with
faint striations and minute hair pits, no subapical teeth or
crenulations, large triangular basal tooth; scape very stout, matt due
to fine spiculation and minute hair pits; funiculus thick, segments
barely longer than wide, bristly but with fine decumbent hairs; head
profile flattened with large, rounded posterior processes; minute stout
hairs arising from hair pits.
Alitrunk - altogether flat, concave on dorsum of pronotum distinct but
shallowly convex "saddle"; spiracle a relatively small, rearward facing
oval; propodeum near flat with slight downward slope to declivity;
declivity itself vertical with inturn to base; metapleural gland upper
flange no longer than lower; sculpturation densely and quite coarsely
spiculated all over; stout minute hairs all over dorsum; several coarse
moderately long erect hairs on posterior of dorsal propodeum.
Petiole - short and bulky, with well developed posteroventral lobes and
small anterior lobes; in dorsal view a globular cube; spiracle very
small and low down; subpetiolar process a broad based triangle filling
anterior half; sculpturation as alitrunk; several coarse hairs on
posterior dorsum and below.
Gaster - all segments densely but more finely spiculate than alitrunk;
moderate waisting; coarse hairs on dorsum of 1, fringes of others and
Legs - coxae long relative to rest of leg segments, densely spiculated;
femora short, wide and shiny, distinctly flattened, fine decumbent
pilosity; tibiae relatively short, fine and quite sparse bristles;
tarsi relatively short, moderate claws for the overall large size.
Very small relative to major; head distinctively rectangular, densely
spiculate, matt, colour dull yellow; dorsum with sparse fine, short
pilosity; scape yellow, short and broad; funiculus very stout and