Mayriella granulata

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Mayriella granulata
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Mayriella
Species: M. granulata
Binomial name
Mayriella granulata
Dlussky & Radchenko, 1990

Nests of M. granulata are found in rotting twigs, under stones and in the litter layer (Eguchi et al. 2011)

Identification

This species is similar to Mayriella transfuga and can be separated from it by the presence of relatively short and broad propodeal spines (the spines are at most about as long as the width of their bases while they are at least 1.5 times the width of the base in M. transfuga). It can be separated from the remaining species in the genus by the presence of well developed sculpturing in the posterior section of the scrobe, the large, closely spaced pits on the mesosomal dorsum, the parallel lateral surfaces of the postpetiole and the strongly angular petiolar node. This species may be a slight variant of transfuga but without additional material to assess the variation this form is retained as a good species. (Shattuck and Barnett 2007)

Distribution

Distribution based on Regional Taxon Lists

Oriental Region: Vietnam (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Species of Mayriella show strong preference for moist, forested areas. Most specimens have been collected from rainforest or wet sclerophyll woodlands with relatively few collections from dry sclerophyll or scrub habitats (and these are restricted to Australia). Nests are normally found in soil under stones or with a small mound of loose dirt at the entrance. They have also been found nesting in rotten logs and occasionally arboreally. The number of workers in nests averages between 50 and 100 and about one-half of the nest series containing queens contain more than one, suggesting that species are polygynous. Foraging workers are most commonly collected from litter samples. Nests appear to be locally abundant although patchily distributed on a larger scale. For example, in the Brindabella Ranges near Canberra, ACT, Mayriella ebbei is infrequently encountered and is known from only a few localities. However, near Baroomba Rocks (located on the eastern slope of the Brindabella Ranges) M. ebbei occurs commonly under rocks in an area covering several hundred square meters. This population appears limited to this small area as nests could not be found in areas with similar geography and vegetation located several kilometers away. However, observations are limited and additional data will be required to determine if these habits are widespread and/or occur in other species. Additionally, while Taylor (1961) made similar observations for Mayriella abstinens, these were based on the introduced population found in New Zealand and should be confirmed for naturally occurring populations of the genus.

Castes

Nomenclature

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

  • granulata. Mayriella granulata Dlussky & Radchenko, 1990: 123, figs. 1-3 (w.) VIETNAM. See also: Shattuck & Barnett, 2007: 445.

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

Description

Worker

Shattuck and Barnett (2007) - Sculpturing in posterior section of antennal scrobe well developed and distinct; sculpturing on dorsal surface of mesosoma consisting of large, closely spaced pits; propodeal spines relatively long and broad; dorsal surface of petiole in lateral profile uniformly convex, without distinct dorsal and posterior faces and forming a sharp angle with the anterior face; in dorsal view, postpetiole with the anterior and posterior regions approximately the same width (the region connecting them either flat or weakly convex); postpetiole and gaster lacking erect hairs dorsally.

Measurements. Holotype - CI 0.98; HL 0.43; HTL 0.22; HW 0.42; ML 0.45; PW 0.30; SI 0.57; SL 0.24.

References

  • Dlussky, G. M.; Radchenko, A. G. 1990. The ants (Hymenoptera, Formicidae) of Vietnam. Subfamily Pseudomyrmicinae. Subfamily Myrmicinae (tribes Calyptomyrmecini, Meranoplini, Cataulacini). Pp. 119-125 in: Akimov, I. A., Emelianov, I. G., Zerova, M. D. et al. (eds.) News of faunistics and systematics. Kiev: Naukova Dumka, 184 pp. (page 123, figs. 1-3 worker described)
  • Eguchi, K., Bui, T.V. & Yamane, S. 2011. Generic synopsis of the Formicidae of Vietnam. Part 1 – Myrmicinae and Pseudomyrmecinae. Zootaxa 2878: 1-61. PDF
  • Shattuck, S.O. & Barnett, N.J. 2007. Revision of the ant genus Mayriella (pp. 437-458). In Snelling, R.R., Fisher, B.L. & Ward, P.S. (eds). Advances in ant systematics: homage to E.O. Wilson – 50 years of contributions. Memoirs of the American Entomological Institute 80:690 pp.