Mycocepurus goeldii

Mycocepurus goeldii
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Myrmicinae
Tribe:	Attini
Genus:	Mycocepurus
Species:	M. goeldii
Binomial name
	Mycocepurus goeldii; (Forel, 1893) Specimen labels
Synonyms
	Atta goeldii schuppi Forel, 1901; Descolemyrma ogloblini Kusnezov, 1951; Mycocepurus goeldii gentilis Santschi, 1925; Mycocepurus ogloblini Santschi, 1933;

Identification

Distribution

Ranging approximately from the 40th to the 67th meridian west and from the 2nd to the 31st latitude south, an area covering most of Brazil, parts of Bolivia, Paraguay and northern Argentina.

Latitudinal Distribution Pattern

Latitudinal Range: -1.76556° to -64.36°.


North Temperate	North Subtropical	Tropical	South Subtropical	South Temperate

Source: AntMaps

Distribution based on Regional Taxon Lists

Neotropical Region: Argentina, Brazil (type locality), Guyana, Paraguay.

Distribution based on AntMaps

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.

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.

Habitat

The range of habitats occupied by M. goeldii is remarkably diverse and ranges from Amazon rainforest, savannahs (Cerrado) to the fertile South American lowlands (Pampas), and secondary habitats disturbed by human activities. It does not occur in elevated sites of the South American Cordilleras.

Abundance

Abundant and conspicuous.

Biology

Explore Fungus Growing

For additional details see Fungus growing ants.

A handful of ant species (approx. 275 out of the known 15,000 species) have developed the ability to cultivate fungus within their nests. In most species the fungus is used as the sole food source for the larvae and is an important resource for the adults as well. Additionally, in a limited number of cases, the fungus is used to construct part of the nest structure but is not as a food source.

These fungus-feeding species are limited to North and South America, extending from the pine barrens of New Jersey, United States, in the north (Trachymyrmex septentrionalis) to the cold deserts in Argentina in the south (several species of Acromyrmex). Species that use fungi in nest construction are known from Europe and Africa (a few species in the genera Crematogaster, Lasius).

The details of fungal cultivation are rich and complex. First, a wide variety of materials are used as substrate for fungus cultivating. The so-called lower genera include species that prefer dead vegetation, seeds, flowers, fruits, insect corpses, and feces, which are collected in the vicinity of their nests. The higher genera include non leaf-cutting species that collect mostly fallen leaflets, fruit, and flowers, as well as the leafcutters that collect fresh leaves from shrubs and trees. Second, while the majority of fungi that are farmed by fungus-feeding ants belong to the family Lepiotaceae, mostly the genera Leucoagaricus and Leucocoprinus, other fungi are also involved. Some species utilise fungi in the family Tricholomataceae while a few others cultivate yeast. The fungi used by the higher genera no longer produce spores. Their fungi produce nutritious and swollen hyphal tips (gongylidia) that grow in bundles called staphylae, to specifically feed the ants. Finally, colony size varies tremendously among these ants. Lower taxa mostly live in inconspicuous nests with 100–1000 individuals and relatively small fungus gardens. Higher taxa, in contrast, live in colonies made of 5–10 million ants that live and work within hundreds of interconnected fungus-bearing chambers in huge subterranean nests. Some colonies are so large, they can be seen from satellite photos, measuring up to 600 m3.

Based on these habits, and taking phylogenetic information into consideration, these ants can be divided into six biologically distinct agricultural systems (with a list of genera involved in each category):

Nest Construction

A limited number of species that use fungi in the construction of their nests.

some Crematogaster
some Lasius

Lower Agriculture

Practiced by species in the majority of fungus-feeding genera, including those thought to retain more primitive features, which cultivate a wide range of fungal species in the tribe Leucocoprineae.

Coral Fungus Agriculture

Practiced by species in the Apterostigma pilosum species-group, which cultivate fungi within the Pterulaceae.

some Apterostigma

Yeast Agriculture

Practiced by species within the Cyphomyrmex rimosus species-group, which cultivate a distinct clade of leucocoprineaceous fungi derived from the lower attine fungi.

some Cyphomyrmex

Generalized Higher Agriculture

Practiced by species in several genera of non-leaf-cutting "higher attine" ants, which cultivate a distinct clade of leucocoprineaceous fungi separately derived from the lower attine fungi.

Leaf-Cutter Agriculture

A subdivision of higher attine agriculture practiced by species within several ecologically dominant genera, which cultivate a single highly derived species of higher attine fungus.

Note that the farming habits of Mycetagroicus (4 species) are unknown. Also, while species of Pseudoatta (2 species) are closely related to the fungus-feeding genus Acromyrmex, they are social parasites, living in the nests of their hosts and are not actively involved in fungus growing. ‎

Rabeling & Bacci (2010) - Mycocepurus goeldii is a conspicuous, widely distributed species. The natural history of Mycocepurus goeldii has been studied near Sao Paulo City (Luederwaldt, 1918, 1926) and in the Manaus region of the Amazon Basin (Rabeling et al., 2007b).

A queen of Mycocepurus castrator standing on a host Mycocepurus goeldii queen.

In Rio Claro, Sao Paulo State, Brazil Mycocepurus goeldii is parasitized by Mycocepurus castrator.

Colony Attributes

A natural history study of M. goeldii in the Amazon Basin (Rabeling et al., 2007b) showed that some colonies had a single queen, whereas others were occupied by as many as four queens. Dissection of eight individuals from three separate colonies revealed that all of them were inseminated and had fully developed ovaries, demonstrating that these colonies were functionally polygynous. A M. goeldii colony studied in 2008 contained a single reproductively active queen, 33 alate queens, 496 workers and no males. During the excavation, males and queens were leaving the maternal colony for their nuptial flight, which started on 7 October.

Castes

M. goeldii queen (b,d,f,h)

M. goeldii male (b,d,f,h)

Nomenclature

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

goeldii. Atta (Mycocepurus) goeldii Forel, 1893g: 370 (footnote) (w.) BRAZIL. Forel, 1908c: 353 (q.m.). Combination in Mycocepurus: Luederwaldt, 1918: 39. Senior synonym of gentilis, ogloblini Santschi, ogloblini Kusnezov, schuppi: Kempf, 1963b: 420.
schuppi. Atta (Mycocepurus) goeldii var. schuppi Forel, 1901d: 301 (w.) BRAZIL. Combination in Mycocepurus: Emery, 1924d: 335. Junior synonym of goeldii: Kempf, 1963b: 420.
gentilis. Mycocepurus goeldii st. gentilis Santschi, 1925b: 17 (w.) BRAZIL. Junior synonym of goeldii: Kempf, 1963b: 420.
ogloblini. Mycocepurus ogloblini Santschi, 1933e: 119, figs. 12, 13 (w.q.) ARGENTINA. Junior synonym of goeldii: Kempf, 1963b: 420.
ogloblini. Descolemyrma ogloblini Kusnezov, 1951d: 460, pl. 1, fig. 1 (m.) ARGENTINA. [Unresolved junior secondary homonym of ogloblini Santschi, above.] Junior synonym of goeldii: Kempf, 1963b: 420.

Description

Karyotype

2n = 8, karyotype = 8M (Brazil) (Barros et al., 2010).
n = 4, 2n = 8, karyotype = 4M+4SM (Brazil) (Cardoso & Cristiano, 2021).

References

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