Monomorium dictator

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Monomorium dictator
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Monomorium
Species: M. dictator
Binomial name
Monomorium dictator
Santschi, 1937

Monomorium dictator casent0913572 p 1 high.jpg

Monomorium dictator casent0913572 d 1 high.jpg

Specimen Labels

Nothing is known about the biology of Monomorium dictator.

Identification

Bolton (1987) - M. dictator is closely related to Monomorium bicolor and Monomorium rufulum. It separates from the former by having the gaster much more densely hairy than in bicolor, and dictator lacks the very reduced fourth (basal) tooth on the mandible, which is characteristic of rufulum. Other members of the bicolor-complex, characterized together by their possession of dense reticulate-punctate sculpture on the head and alitrunk, and bicoloured body with the gaster blackish brown to black and the head and alitrunk reddish, separate from dictator as follows.

Monomorium westi, presently known only from Kenya, has the two longitudinal clypeal carinae terminating in freely projecting sharp teeth, not developed in dictator. Monomorium personatum, a species sympatric with dictator, has much larger eyes whose maximum diameter is 0.31-0.33 x HW, as opposed to 0.25 x HW in dictator. Monomorium hirsutum, known only from Ethiopia, has the dorsal alitrunk densely hairy; in dictator the alitrunk lacks standing hairs.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Angola (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • dictator. Monomorium (Xeromyrmex) bicolor st. dictator Santschi, 1937d: 224, figs. 20, 21 (w.q.) ANGOLA. Raised to species and material of the unavailable name impuriceps referred here: Bolton, 1987: 341.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Bolton (1987) - TL 2.9, HL 0.74-0.76, HW 0.57-0.59, CI 77-78, SL 0.62-0.63, SI 107-109, PW 0.40, AL 0.86 (3 measured).

Third and fourth (basal) tooth of mandible subequal in size, the latter very slightly smaller than the former but not reduced to a minute denticle. Median portion of clypeus with its anterior free margin shallowly concave and flanked by rounded blunt angles, without projecting sharp teeth at the apices of the clypeal carinae. Eyes of moderate size, the maximum diameter about 0.25 x HW and with 9-10 ommatidia in the longest row. Dorsal alitrunk without hairs but the first gastral tergite conspicuously pilose, with 6-8 pairs of evenly distributed hairs on the sclerite in front of the apical transverse row. Entirety of head and alitrunk reticulate-punctate. Head and alitrunk red to orange-red, the gaster blackish brown to black, without an orange or reddish patch mediobasally.

Type Material

Bolton (1987) - Syntype workers, female, Angola: Ebanga, 1932-33 (A. Monard) (Naturhistorisches Museum, Basel) [examined].

References