Adetomyrma cassis

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Adetomyrma cassis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Amblyoponinae
Tribe: Amblyoponini
Genus: Adetomyrma
Species: A. cassis
Binomial name
Adetomyrma cassis
Yoshimura & Fisher, 2012

Adetomyrma cassis casent0163620 p 1 high.jpg

Adetomyrma cassis casent0163620 d 1 high.jpg

Specimen Labels

Adetomyrma cassis is only known from a single male collected in Réserve Spéciale Ambatovaky.


Yoshimura and Fisher (2012) - The male of A. cassis is distinguished easily from other Adetomyrma males by a distinct and flatted projection on the posterior portion of the paramere. This projection is not separated from the paramere by a deep notch as in Adetomyrma bressleri.

This genital character observed in Adetomyrma cassis is completely unique and sufficient to regard this male as a distinct species, although we have found neither another specimen nor sympatric distribution with other Adetomyrma species.

Keys including this Species


Distribution based on Regional Taxon Lists

Malagasy Region: Madagascar (type locality).

Distribution based on AntMaps


Distribution based on AntWeb specimens

Check data from AntWeb



Known only from the male caste.


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

  • cassis. Adetomyrma cassis Yoshimura & Fisher, 2012b: 19, figs. 14, 15, 32, 41, 50, 67 (m.) MADAGASCAR.

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



Measurements: holotype. HL 0.74, HW 1.08, SL 0.3, EL 0.43, WL 2.22, MnW 1.33, CI 144.8, SI 27.9, EI 58.1, MnI 123.8.

Eye well-developed and prominent, posterior margin not exceeding posterior margin of mid ocellus in full-face view. Distance between lateral ocellus and eye long, about 3× longer than diameter of lateral ocellus. Palpal formula 3,2? (three maxillary and two? labial: observed without dissection). Notaulus absent on mesoscutum. Parapsidal line clearly impressed. Anterior margin of petiole as long as dorsal margin in lateral view. Subpetiolar process well-developed, with dense hairs ventrally.

Left and right parameres narrowly overlapping on dorsal small part of basimere. Distinct, flattened projection present on each posterior portion of paramere with small denticles on distal and mesal portions of projection.

Hair on compound eyes long, longer than diameter of mid ocellus. Mesofemur in dorsal view with anterior face covered in dense, subdecumbent hairs. Ventral margin of eye edged with darker pigment but without minute punctures on the area. Body color almost uniform dark brown but head darker.

Type Material

Holotype. Male: CASENT0163620, BLF24309: MADAGASCAR, Toamasina, Réserve Spéciale Ambatovaky, Sandrangato river, 16° 46.36´ S, 49° 15.93´ E, 450 m alt., rainforest, 4 Malaise traps, 20–24.ii.2010, B.L.Fisher et al. California Academy of Sciences


This species name is derived from the Latin word cassis (helm), and refers to the shape of its genital capsule, which looks like a Corinthian helm. The species epithet is treated as a noun in apposition, and thus invariant.


  • Yoshimura, M. & Fisher, B.L. 2012. A revision of the Malagasy endemic genus Adetomyrma (Hymenoptera: Formicidae: Amblyoponinae). Zootaxa, 3341, 1-31.

References based on Global Ant Biodiversity Informatics

  • Yoshimura M., B.L. Fisher. 2012. A revision of the Malagasy endemic genus Adetomyrma (Hymenoptera: Formicidae: Amblyoponinae). Zootaxa 3341: 1-31.