The Ants of Africa
Genus Dorylus - Subgenus Anomma

Dorylus (Anomma) emeryi Mayr

EMERYI group - characters - head narrowing < 60%; relatively shallow in profile; mandibles short and thick, with subapical tooth; relatively dull matt; propodeal spiracle small and circular

Dorylus (Anomma) emeryi Mayr

return to key {link to the Hymenoptera Name Server} Type locality Cameroun (Dorylus Emeryi nov. spec., Mayr, 1896: 225, all worker morphs; collector Y. Sjöstedt) - see below
subspecies pulsi (Anomma Emeryi Mayr v. Pulsi n. var., Forel, 1904d: 170, worker; Santschi, 1923e: 176, major) from "Afrique occidentale", coll. Ballion - no images on Antweb (June 2014).
workers only known (see Bolton, 1995; may be in Raignier & van Boven, 1955) .

{Dorylus (Anomma) emeryi}Mayr's (1896) description is at {original description} and {original description}. Forel's (1904d) description of pulsi is at {original description}. Santschi's (1923e) description of the soldier of pulsi, from Aburi, Ghana, collector F Silvestri, is at {original description}.

From Raignier & van Boven (1955), Mayr's original description made comparison with nigricans, syn. rubellus. Raignier & van Boven considered this unfortunate as the closer comparison would be with gerstaeckeri; emeryi being bigger TL 12.7 mm; head rectangular, slightly longer than wide, and slightly more than 1/3 of TL (in gerstaeckeri it is slightly less than 1/3); posterior border of head deeply scalloped; scape more slender than nigricans and not reaching mid-length of head; petiole a little longer than wide (Santschi, 1912b); colour red-brown; most of head shiny, the vertex strongly so, with sparse puncturation; body semi-matt, legs shiny. The variety pulsi of Forel (1904) was described solely from media morphs and so has no merit.

Wheeler (1922) listed findings from Ghana (Aburi, by F. Silvestri); Cameroun (Mundame, by Conradt) and Zaire (by Kohl); pulsi was solely from "West Africa".

{Dorylus emeryi major} Nigeria specimens (Dorylus (Anomma) species in wilverthi group, Taylor, 1980b: 13). WORKERS. TL 10.13-4.18 mm; ; at least four morphs; largest HL 3.47, HW 1.41, SL 1.14, PW 1.14, petiole length 0.87.
Colour red-brown. Sculpturation of fine dense puncturation. Erect hairs relatively abundant on gaster, petiole and on dorsum of propodeum. Head widest at mid-length, pronounced domed dorsolateral posterior prominences or tubercles. Antennal scape gradually thickening to a broad apex. Mandibles with a long apical tooth subtended by a denticulate margin running to a basal triangular tooth; numerous hairs on the inner margin. Antennal scapes short and thick, funiculus segments beadlike. Subpetiolar process is a blunt rear-curved triangle. All morphs of similar appearance, progressively lighter as size diminishes, smallest yellow-brown, tubercles on head visible on all except the smallest.
The specimens in the museum at the Cocoa Research Institute of Nigeria, Idi Ayunre, were not fully labelled but probably were collected by R.H. Booker at CRIN or Ibadan (Moor Plantation?).

{Dorylus emery cotype worker} The photomontage is of a syntype worker collated from

Note: This is a large media worker, with small median teeth on the mandibles and the Antweb scales are wrong. The true head width should be ca. 3.0 mm, and the TL ca. 11 mm. The scales give HW < 5 mm and TL < 21 mm.

Oxford University Museum specimens

Dorylus (Anomma) emeryi pulsi
B Taylor det.
Ivory Coast
Erena Dupont
Taï National Park
5˚45'00" N
7˚07'00" W
YSBCI 2015-31-5-2014
full range of workers
Dorylus (Anomma) emeryi
B Taylor det.

Central African Republic
P Annoyer

assiette jaune
Dorylus (Anomma) emeryi
B Taylor det.
Central African Republic
P Annoyer

392 m
"OC bis sol"


{Dorylus (Anomma) emeryi polymorphismPolymorphism

The photomontages are of specimens from the Central African Republic, Dzanga-Sangha NP; collector Philippe Annoyer (CAR 15_18_x).

The various morphs are shown in detail on the Dorylus (Anomma) emeryi morphs page 1 and Dorylus (Anomma) emeryi page 2.

{Dorylus (Anomma) emeryi polymorphismThe photomontage is of a major worker of pulsi from Ivory Coast, Tai; collector Erena Dupont.

{Dorylus (Anomma) emeryi polymorphismThe photomontage is of a minima worker of pulsi from Ivory Coast, Tai; collector Erena Dupont.

© 2007, 2008, 2011, 2012, 2014, 2015 - Brian Taylor CBiol FSB FRES
11, Grazingfield, Wilford, Nottingham, NG11 7FN, U.K.