Strumigenys dolabra

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

Strumigenys dolabra casent0005523 profile 1.jpg

Strumigenys dolabra casent0005523 dorsal 1.jpg

Specimen labels

Known from litter samples collected in tropical dry forest.

Identification

Bolton (2000) - A member of the alapa complex in the Strumigenys arnoldi-group. Within the arnoldi-group with 6 antennal segments, dolabra and Strumigenys toma are separated from all other members by having the following in combination.

1 Cephalic dorsum without hairs on posterior third which are similar in shape to hairs on leading edge of scape.

2 Pronotal humeri and mesonotum without erect hairs.

3 Base of first gastral tergite with few basal costulae.

4 Propodeum in profile terminating in a blunt angle.

5 Lamella on propodeal declivity broad.

S. dolabra is distinguished from toma as follows.

S. dolabra

1 First gastral tergite with punctulate-reticulate sculpture restricted to region of basal costulae, remainder smooth.

2 In full-face view cephalic dorsum with clavate to spoon-shaped hairs on anterior two-thirds, rows of hairs absent from vertex, posterior to apex of upper scrobe margin.

S. toma

1 First gastral tergite covered in punctulate- to granulate-reticulate sculpture, at least on lateral margins posteriorly.

2 In full-face view cephalic dorsum with broadly scale-like to orbicular hairs on anterior two-thirds, extending on to vertex, posterior to apex of upper scrobe margin.

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

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.
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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.
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Biology

Castes

Nomenclature

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

  • dolabra. Strumigenys dolabra Fisher, in Bolton, 2000: 631 (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 1.7, HL 0.40, HW 0.38, CI 94, ML 0.11, MI 28, SL 0.19, SI 50, PW 0.23, AL 0.45. Characters of alapa-complex. Mandible with a single preapical tooth. Anterolateral margin of clypeus with medially curved spoon-shaped hair that is larger and more conspicuous than hairs found on anterior margin of clypeus. Cephalic dorsum posterior of clypeal margin with spoon-shaped hairs on anterior two thirds; upper scrobe margin with spoon-shaped hairs. Pronotal humeral hair absent; mesonotum without standing hairs. In profile, promesonotal dorsum very shallowly convex anteriorly; propodeal dorsum gradually sloping posteriorly to the declivity and posteriorly meeting the sides in a blunt diverging angle. Propodeal dorsum meeting the declivity in a blunt angle without a noticeable tooth. Ventral spongiform tissue well developed and conspicuous on propodeum, petiole and postpetiole. In profile, spongiform lamella on propodeal declivity broad, approximately half the width of ventral spongiform curtain on petiole. First gastral tergite with few basigastral costulae. Punctulate-reticulate sculpture on tergite restricted to region of basal costulae, remainder of tergite smooth. Hairs on postpetiole and gaster filiform. Color pale brown.

Type Material

Holotype worker, Madagascar: Provo Toliara, southern Isoky-Vohimena Forest, 22°41'S, 44°50'E, 730 m., 21.i.1996, sifted litter (leaf mold, rotten wood), tropical dry forest, # 1312 (5)-3 (S. Razajimandimby) (Museum of Comparative Zoology).

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 631, worker described)

References based on Global Ant Biodiversity Informatics

  • Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
  • Fisher B. L. 2003. Formicidae, ants. Pp. 811-819 in: Goodman, S. M.; Benstead, J. P. (eds.) 2003. The natural history of Madagascar. Chicago: University of Chicago Press, xxi + 1709 pp.