Strumigenys bathron

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Strumigenys bathron
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. bathron
Binomial name
Strumigenys bathron
Fisher, 2000

Strumigenys bathron casent0005491 profile 1.jpg

Strumigenys bathron casent0005491 dorsal 1.jpg

Specimen labels

The type material was collected from sifted litter (leaf mold, rotten wood) in rainforest.

Identification

Bolton (2000) - A member of the abdera complex in the Strumigenys arnoldi-group. The sample from 6.9 km. NE Ambanizana differs slightly in the diagnostic characters of the type material. In this single specimen, the clavate hairs on petiolar dorsum are broader and the ventral spongiform lamella on the petiole is narrower. Additional collection may reveal that this is actually a sibling species.

S. bathron is distinguished from other species in the arnoldi-group that have 6 antennomeres by having the cephalic dorsum with broad spoon-shaped to orbicular hairs present on posterior third, dorsum of petiole with a pair of broadly clavate to remiform hairs; and lacking pronotal humeral hairs.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Malagasy Region: Madagascar (type locality).


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Nomenclature

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

  • bathron. Strumigenys bathron Fisher, in Bolton, 2000: 629 (w.) MADAGASCAR.

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

Description

Worker

Holotype. TL 2.0, HL 0.47, HW 0.45, CI 96, ML 0.17, MI 36, SL 0.26, SI 58, PW 0.26, AL 0.48. Characters of abdera-complex. Mandible with a single long preapical tooth. Dorsum of head from posterior clypeal margin to occipital margin including occipital angles and along upper scrobe margin with spoon-shaped hairs that are similar in shape to hairs on leading edge of scape. Pronotal humeral hair absent; anterior margin of mesonotum without erect stiff hairs. Dorsum of petiole with a pair of broadly clavate to remiform hairs on posterior lateral margin. In profile, promesonotal dorsum convex; propodeal dorsum shallowly convex anteriorly, sloping posteriorly to the declivity. Cuticle on anterior half of propodeal declivity alveolate. Spongiform tissue well developed on declivity of propodeum, petiole and postpetiole. Propodeal teeth incorporated in the lamellae, with only a small point projecting; propodeal lamellae broad, more than half as broad as ventral lamella of petiole. Disc of postpetiole smooth; in dorsal view completely surrounded by spongiform tissue, forming a narrow band along anterior lateral angles. Color dull yellow to pale brown.

Paratypes. TL 1.8-1.9, HL 0.45, HW 0.43, CI 95-96, ML 0.15, MI 33-34, SL 0.22-0.24, SI 51-55, PW 0.23-0.25, AL 0.46-0.47 (2 measured). As holotype.

Measurements of non-paratypic material extends the range shown by the types series: HL 0.41-0.46, HW 0.41-0.43, CI 94-97, ML 0.13-0.16, MI 32-35, SL 0.22-0.23, SI 53-57 (4 measured).

Type Material

Holotype worker, Madagascar: 6.5 km. SSW Befingotra, Res. Anjanaharibe-Sud, 14°45'S, 49°30'E., 875 m., 19.x.1994, sifted litter (leaf mold, rotten wood), rainforest #1070 (L. O.)-15 (B. L. Fisher) (Museum of Comparative Zoology).

Paratypes. 2 workers with same data as holotype but coded (8)-9, (50)-1 (The Natural History Museum).

References

  • Fisher, B.L. 2000. The Malagasy fauna of Strumigenys. Pp. 612-696 in: Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 629, worker described)