Rogeria subarmata

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Rogeria subarmata
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Rogeria
Species: R. subarmata
Binomial name
Rogeria subarmata
(Kempf, 1961)

Rogeria subarmata usnment01124289 d 1 high.jpg

Specimen Labels

The type series was collected from the stomach of an anteater (Tamandua tetradactyla).

Identification

Kugler (1994) - scandens species group. WL 0.78-1.00mm. Eye with 30-53 facets. Propodeal spines short (PSI 0.09-0.12). Pygidium with a pair of median piligerous tubercles near caudal margin. Strong macrosculpture on mesosoma and petiolar node. Erect hairs not as rigid as in scandens; tips acute.

Keys including this Species

Distribution

Brazil and Venezuela

Distribution based on Regional Taxon Lists

Neotropical Region: Brazil (type locality), Ecuador, Venezuela.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

The following is modified from Kugler (1994): Little is known about these cryptic ants. Collection records typically range from sea level to 1000m, but five species extend higher and two (Rogeria unguispina and Rogeria merenbergiana) can be found at 2000m. Rogeria are generally collected in moist forests (primary or secondary forests, coffee or cacao plantations), but at higher elevations can be found in pastures (Rogeria leptonana, Rogeria merenbergiana). Several species (Rogeria creightoni, Rogeria cuneola, Rogeria foreli) have been found in moist and dry climates. Rogeria foreli is the most unusual, with some members dwelling at over 1800m in the temperate mountains of southern Arizona.

Most species have only been collected as strays or by Berlese or Winkler sampling, from leaf litter and rotten wood, but occasionally among epiphytes and moss (Rogeria belti, creightoni, Rogeria exsulans). Nests of several species (belti, Rogeria blanda, merenbergiana) have been found under the loose bark of rotten logs. Nests of blanda and Rogeria tonduzi have been taken from the trunks of cacao trees. A nest of Rogeria leptonana was found at 1750m under a rock in a pasture.

Nests are rarely found. Males are known for only four species (belti, blanda, leptonana and Rogeria stigmatica) and queens associated through nest series for only nine species.

Castes

Only known from workers.

Nomenclature

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

  • subarmata. Irogera subarmata Kempf, 1961d: 438, figs. 1-4 (w.) BRAZIL. Combination in Rogeria: Kempf, 1965: 185. See also: Kugler, C. 1994: 40.

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

Description

Worker

Kugler (1994) - Workers. —TL 2.9-3.7, HL 0.69-0.87, HW 0.60-0.75, SL 0.46-0.57, EL 0.12-0.16 (30-53 facets), PW 0.45-0.57, WL 0.78-1.00, SpL 0.08-0.10, PetL 0.37-0.47, PpetL 0.20-0.26mm, CI 0.86-0.89, OI 0.20-0.23, SI 0.73-0.77, PSI 0.09-0.12. N=6

Kugler 1994 fig 15-23

Additions to Kempf's (1962a) description. Mandibles usually with 5 teeth that decrease in size basad. Sometimes basal tooth replaced by two very small teeth, or 1-2 denticles are found between the basal and penultimate tooth. Clypeal apron weakly notched medially to evenly convex. Frontal lobes narrow as in scandens. Nuchal grooves shallow, forming only a weak notch in lateral view. Figs. 22-23 show the range of propodeal spine size and angle, but tips sometimes more rounded. Petiole clavate to rather distinctly set off from peduncles. Postpetiole from above much as in Fig. 21. Posterior surface of pygidium with a caudal pair of long, columnar, piligerous tubercles that are visible at 50X with a dissection microscope. Sting apparatus nearly identical to that of inermis; sting as in pellecta.

Median clypeus with 1-2 pair of fairly distinct extra carinulae lateral to the usual pair. Posterior head with transversely arching rugose-areolate macrosculpture. Head covered with dense, indistinctly microareolate roughening that appears punctate or granular at lower magnifications. Mesosoma dorsum longitudinally rugose; rugae with numerous lateral spurs that occasionally connect rugae on shoulders. Macrosculpture on sides of mesosoma and dorsal face of propodeum confusedly rugose to rugose-areolate. Mesosoma microsculpture as on head. Petiolar node vermiculate-rugose to rugose-areolate. Postpetiolar node similar, but rugae straighter, more effaced. Microsculpture on nodes slightly weaker than on head and mesosoma.

Scapes and extensor surfaces of legs lack erect hair. Rest of body with both short, appressed-decumbent and longer, erect-suberect hairs. Erect hairs are nearly as stiff as those of scandens and terescandens, but seem to have acute tips.

Color dark brown to yellowish-brown with a reddish tint on mesosoma, waist and middle of gaster; appendages and ends of gaster lighter.

Type Material

Kugler (1994) - Holotype and paratype workers, BRAZIL: Guanabara, Rio de Janeiro, Deodoro (A. Ronna) Museu de Zoologia da Universidade de Sao Paulo [12 of 38 paratypes examined; holotype not examined].

References

  • Kempf, W. W. 1961g. Remarks on the ant genus Irogera Emery, with the description of a new species (Hymenoptera, Formicidae). Rev. Bras. Biol. 21: 435-441 (page 438, figs. 1-4 worker described)
  • Kempf, W. W. 1965. Nota preliminar sôbre algumas formigas neotrópicas, descritas por Frederick Smith (Hymenoptera, Formicidae). Rev. Bras. Biol. 25: 181-186 (page 185, Combination in Rogeria)
  • Kugler, C. 1994. A revision of the ant genus Rogeria with description of the sting apparatus (Hymenoptera: Formicidae). J. Hym. Res. 3: 17-89 (page 40, see also)