Monomorium inquilinum

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Monomorium inquilinum
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Monomorium
Species: M. inquilinum
Binomial name
Monomorium inquilinum
DuBois, 1981

This species was discovered in a nest of Monomorium cyaneum beneath a stone. It is presumed to be a social parasite because of the morphological features shared with other inquilinous Monomorium. Monomorium inquilinum is known only from the type locality.

At a Glance • Workerless Inquiline  



DuBois (1986) - A member of the Monomorium minimum species group. Queen Winged; petiole emarginate; scutum and scutellum not depressed; metanotum (in lateral view) projecting to level of propodeum and scutellum; propodeum angular; clypeus emarginate, lacking teeth; anterior edge of pronotum rounded.

The Monomorium inquilinum female is most similar to Monomorium pergandei and Monomorium talbotae females. It can be easily be separated from these species since the petiole is emarginate only in M. inquilinum. Furthermore, the metanotum does not reach the level of propodeum and scutellum in M. talbotae, and the mesonotum possesses a furrow in M. pergandei.

Keys including this Species


Distribution based on Regional Taxon Lists

Neotropical Region: Mexico (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb



Known only from the queen caste, this species is presumed to have no worker caste.


The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • inquilinum. Monomorium inquilinum DuBois, 1981: 34, fig. 2 (q.) MEXICO. See also: DuBois, 1986: 116.

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



As described for Monomorium talbotae except as follows. Head: {representing holotype only} HL 0.45, HW 0.39, SL 0.40, IOD 0.10, OD 0.04, EL 0.10, MOD 0.08. Structure—CI 89, SIL 89, SIW 100. Scape surpassing occiput by amount slightly greater than length of pedicel. Labial palp 2-segmented. Clypeal teeth absent (clypeus retaining emargination where space between teeth should occur). Alitrunk: Measurements PW 0.30, PL 0.15, WL 0.66. Structure—Mesopleural suture straight. Metanotum (in lateral view) projecting to level of propodeum and scutellum. Propodeum angular, basal face length half length of declivitous face. PI 22. Wings absent (presence of basal sclerites indicate holotype once possessed wings). Pilosity—As in M. cyaneum. Sculpture—As in M. talbotae. Petiole. Dorsum of node emarginate. Entire surface (except dorsum of petiolar node) covered with small, dense, nonpiliferous punctures (causing a granular appearance); dorsum of node smooth and shining with small piliferous punctures. Postpetiole. Dorsum of node emarginate. Gaster: As in M. pergandei. Color: Head dark brown, antenna yellow. Alitrunk dark brown, legs brown (tibiae and tarsi yellow). Petiole, postpetiole, and gaster dark brown. All setae white.

Type Material

DuBois (1986) - Known only from the holotype (DuBois, 1981a): Estado de Mexico: Highway 57 (between Mexico City and Queretaro), km 127 (measured from Mexico City), high desert, Cornell University Mexico Field Party, 9 August 1965 (1 female, Museum of Comparative Zoology).


References based on Global Ant Biodiversity Informatics

  • Fernandes, P.R. XXXX. Los hormigas del suelo en Mexico: Diversidad, distribucion e importancia (Hymenoptera: Formicidae).
  • Vásquez-Bolaños M. 2011. Lista de especies de hormigas (Hymenoptera: Formicidae) para México. Dugesiana 18: 95-133