Rogeria megastigmatica

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Rogeria megastigmatica
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Rogeria
Species: R. megastigmatica
Binomial name
Rogeria megastigmatica
Kugler, C., 1994

Rogeria megastigmatica P casent0199657.jpg

Rogeria megastigmatica D casent0199657.jpg

Specimen Label

Only known from a few collections from the Solomon Islands.

Identification

stigmatica species group.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Solomon Islands (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

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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.

  • megastigmatica. Rogeria megastigmatica Kugler, C. 1994: 35, fig. 13 (w.) SOLOMON IS.

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 fig 7-14

Holotype and Paratype. TL 4.5-4.9 (4.5), HL 1.01-1 .09 (1 .01), HW 0.90-1.00 (0.91), SL 0.77-0.83 (0.77), EL 0.16-0.19 (0.16) (41-52 facets), PW 0.62-0.70 (0.62), WL 1. 18-1.30 (1.18), SpL 0.10-0.11 (0.11), PetL 0.51-0.52 (0.52), PpetL 0.28-0.31 (0.28)mm, CI 0.88-0.92 (0.90), OI 0.18-0.19 (0.18), SI 0.83-0.87 (0.85), PSI 0.08-0.09 (0.09). N=5

Like Rogeria stigmatica in most respects, but markedly larger (at least 35% larger than stigmatica on other Solomon Islands). Metanotal groove not as narrow or sharply defined. Petiolar node strongly asymmetrical in side view (Fig. 13).

Mandibles triangular, with at least 6 teeth, some basal denticles may have been abraded. Median clypeal apron convex. Mandibular carinulae effaced. Pronotum areolate with a rugose-areolate patch in center of disc. Dorsal face of propodeum transversely rugulose. Petiolar peduncle smooth; sides of node areolate; posterior face transversely rugulose-areolate or areolaterugose.

Type Material

Holotype locality. SOLOMON ISLANDS: Guadalcanal, Ilu Bush, 16-III-1962, #1181 (P.J. M. Greenslade) Museum of Comparative Zoology. Paratype localities. SOLOMON ISLANDS: 1 worker, holotype locality MCZ; 3 workers, San Cristobal, Kira Kira, 24-IV-1962, #1579 (P. J. M. Greenslade) MCZ.

References

  • 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 35, fig. 13 worker described)