Mycetophylax lilloanus

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Mycetophylax lilloanus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Mycetophylax
Species: M. lilloanus
Binomial name
Mycetophylax lilloanus
(Kusnezov, 1949)

Nothing is known about the biology of this species.

Identification

See the description below.

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Argentina (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

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

  • lilloanus. Cyphomyrmex lilloanus Kusnezov, 1949d: 442, figs. 1-3 (w.) ARGENTINA.
    • Combination in Mycetophylax: Sosa-Calvo et al., 2017: 9.
    • See also: Kempf, 1964d: 40.

Description

Kempf (1964) - The specific distinction of lilloanus is unquestionable and bears no further comment. There is a question about its affinities. By placing it into subgenus Syphomannia, Kusnezov seems to point towards Cyphomyrmex laevigatus Weber (the type an only species of the subgenus) as the closest relative, although he did not fail in stressing the nearly abysmal differences that separate both species.

As shown elsewhere (Kempf, 1962:30-31), Cyphomannia is untenable as a group-name, laevigatus being just a slightly aberrant species of the rimosus-group. Moreover, lilloanus, due to its multi dentate mandibles and configuration of antennal scrobe and preocular carina, belongs clearly to the strigatus-group. Although the description does not elucidate the detail, the broad postpetiole of lilloanus has presumably the lateral lobes ventrally excavate and salient, i. e. not appressed to the body or sternum of the segment, and the antennal scrobe distinctly reticulate. If this is true, lilloanus is a somewhat discrepant member of the olitor-subgroup.

Worker

Kempf (1964) - (after original description and figures) Color uniformly ochraceous. Integument opaque, finely sculptured. Size of Mycetophylax olitor, but Kusnezov's measurements are decidedly too low in both cases, as I was able to check on "quebradae" types (now a junior synonym of Mycetophylax olitor). Mandibles with approximately 8 small teeth. Frontal lobes greatly expanded laterad, nearly covering completely the antennal scrobe in full-face view, scarcely constricted behind; frontal carinae subparallel, reaching the little prominent occipital corner where they join the preocular carinae, and circumscribe completely the antennal scrobe. Scapes in repose reaching, not surpassing the occipital corner. Funicular segments 2-9 broader than long. Occipital border gently emarginate, lacking a median notch; apparently no paired carinae on vertex. Thorax completely unarmed, only posterior corners of basal face of epinotum are somewhat marked and tooth-like (in his 1957 key, Kusnezov says that epinotum is completely rounded!). Petiolar and postpetiolar nodes broader than long, the latter over twice as broad as long. Tergum I of gaster with a sagittal furrow on anterior third. Pubescence rare and very fine, scarcely visible.

Type Material

Kempf (1964) - The present species was described upon eight workers, four from Clorinda (Formosa) and 4 from Rio Saladillo (Salta) in the Argentine. Unfortunately, the specimens could not be located in the Miguel Lillo collection, after Dr. Kusnezov's untimely death. Unless some specimens were deposited in other collections, the types are apparently lost. Yet recognition of lilloanus should not prove difficult on account of the peculiar, completely unarmed, thorax.

References

  • Kempf, W. W. 1962. Miscellaneous studies on neotropical ants. II. (Hymenoptera, Formicidae). Stud. Entomol. 5:1-38.
  • Kempf, W. W. 1964d. A revision of the Neotropical fungus-growing ants of the genus Cyphomyrmex Mayr. Part I: Group of strigatus Mayr (Hym., Formicidae). Stud. Entomol. 7: 1-44 (page 40, see also)
  • Kusnezov, N. 1949d. El género Cyphomyrmex (Hymenoptera, Formicidae) en la Argentina. Acta Zool. Lilloana 8: 427-456 (page 442, figs. 1-3 worker described)
  • Kusnezov, N. 1957e. Nuevas especies de hormigas (Hymenoptera, Formicidae). Revista de la Sociedad Uruguaya de Entomología 2:7-18.
  • Sosa-Calvo, J., JesÏovnik, A., Vasconcelos, H.L., Bacci, M. Jr., Schultz, T.R. 2017. Rediscovery of the enigmatic fungus-farming ant "Mycetosoritis" asper Mayr (Hymenoptera: Formicidae): Implications for taxonomy, phylogeny, and the evolution of agriculture in ants. PLoS ONE 12: e0176498 (DOI 10.1371/journal.pone.0176498).