Anochetus pattersoni

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Anochetus pattersoni
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Anochetus
Species: A. pattersoni
Binomial name
Anochetus pattersoni
Fisher, 2008

Anochetus pattersoni casent0068352 profile 1.jpg

Anochetus pattersoni casent0068352 dorsal 1.jpg

Specimen labels

Males have been collected in Malaise traps.


No other species of Anochetus have been recorded from the Seychelles.

Keys including this Species


Known only from the Aldabra Island group, Seychelles. A majority of collections have come from Isle Picard.

Latitudinal Distribution Pattern

Latitudinal Range: -9.392777778° to -9.392777778°.

Tropical South

Distribution based on Regional Taxon Lists

Malagasy Region: Madagascar, Seychelles (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.


Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.









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

  • pattersoni. Anochetus pattersoni Fisher, in Fisher & Smith, 2008: 13, figs. 7a-h, 8d (w.q.m.) SEYCHELLES (Aldabra Group).
    • Type-material: holotype worker.
    • Type-locality: Seychelles: Aldabra Group, Picard I., in old “Settlement”, 9°23’34’’S, 46°12’14’’E, 5 m., 19.xii.1905, SMG14998 (S.M. Goodman).
    • Type-depository: CASC.
    • Distribution: Seychelles (Aldabra Group).

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



Measurements: maximum and minimum based on all specimens, n = 8, (holotype): HL 1.32–1.40 (1.40), HW 1.25–1.31 (1.31), CI 93–95 (94), EL 0.20–0.26 (0.23), ML 0.67–0.72 (0.72), MI 50–51 (51), SL 1.07–1.15 (1.15) SI 85–88 (88), WL 1.62–1.79 (1.78), FL 1.11–1.20 (1.19), PW 0.70–0.76 (0.74).

Dorsal margin of petiole node concave medially. Anterior portion of pronotal dorsum lightly sculptured compared to posterior portion of pronotum. Propodeal dorsum and angle transversely coarsely rugose, declivitous face below angle with transverse striae, with sculpture thinning near base of face; propodeum angulate in lateral view. Petiole scale broad; anterior half of first gastral tergum smooth and shiny with only fine punctures at base of setae. This species is most similar to the graeffei a widespread species across the Indo-Pacific, but differs from the latter by the pattern of sculpture on the mesosomal dorsum, shape the petiole (concave), broader petiole node as seen in lateral view, and its much larger size (HL+ML 1.99–2.12 mm in pattersoni, HL+ML<1.75 mm in Anochetus graeffei).


Measurements: maximum and minimum based on n = 1. HL 1.31, HW 1.29, CI 99, EL 0.30, ML 0.64, MI 49, SL 1.05, SI 81, WL 1.81, FL 1.15, PW 0.79.


Measurements: maximum and minimum based on n = 2 from Madagascar: HL 0.86–0.87, HW 1.07–1.10, CI 124–126, EL 0.65–0.67, SL 0.18, SI 17, WL 1.72–1.77, FL 1.21–1.26

Type Material

Holotype: worker, Seychelles Aldabra Group, Picard Island, in old “Settlement” 09°23′34"S 046°12′14"E 5 m, mostly Casuarina with coco palms, exotic vegetation, found after dark on concrete slab in abandoned settlement 19-Dec-05 (coll. S.M.Goodman) collection code: SMG14998 CASENT0068352 1w (California Academy of Sciences).


  • Fisher, B. L. and M. A. Smith. 2008. A Revision of Malagasy Species of Anochetus Mayr and Odontomachus Latreille (Hymenoptera: Formicidae). PloS one. 3:e1787.

References based on Global Ant Biodiversity Informatics

  • Fisher B. L., and M. A. Smith. 2008. A revision of Malagasy species of Anochetus Mayr and Odontomachus Latreille (Hymenoptera: Formicidae). PLoS ONE 3(5): e1787. doi:10.1371/journal.pone.0001787