Hylomyrma marielleae

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Hylomyrma marielleae
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Pogonomyrmecini
Genus: Hylomyrma
Species: H. marielleae
Binomial name
Hylomyrma marielleae
Ulysséa, 2021

This species inhabits sites at elevations between 120 and 590 m in tropical rainforest, semideciduous forest, bamboo forests, crops, and pastures. There is no further information available regarding the H. marielleae biology, besides nesting in the leaf-litter or inside natural cavities of the superficial soil layers, given that specimens were collected with winkler extractors. (Ulyssea & Brandao, 2021)


Regular and longitudinal striae on head dorsum, parallel towards posterior margin; long scape; vermicular striae on mesosoma; dorsal margin of petiole discontinuous; ventral surface entirely striate; transverse striae; postpetiole covered with thick, regular and longitudinal striae, slightly anastomosed; subpostpetiolar process sculptured on laterobasal region, midbasal region smooth; long striae on tergum of first gastral segment; body with many thick and unbranched setae.

Hylomyrma marielleae is similar to Hylomyrma longiscapa regarding the body size and the sculpture pattern. However, H. marielleae can be easily distinguished from H. longiscapa (characteristic in parentheses) in the thick and dark setae (vs. thin and light), and the transverse striae on the ventral surface of petiole weakly marked (vs. well-marked). Both species have broad distribution in the center-north of South America, however H. longiscapa occurs in many localities in eastern portions of Brazil (from northeast to southeast regions) (Fig. 83) where H. marielleae does not occur (Fig. 85). One queen collected in French Guiana [USNMENT00536047] has lighter setae when compared to the other specimens evaluated here.

Keys including this Species


Latitudinal Distribution Pattern

Latitudinal Range: 4° to -18°.

Tropical South
  • Source: Ulysséa & Brandao, 2021

Distribution based on Regional Taxon Lists

Neotropical Region: Bolivia, Brazil (type locality), Ecuador, French Guiana, Peru.

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.




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

  • marielleae. Hylomyrma marielleae Ulysséa, in Ulysséa & Brandão, 2021: 77, figs. 51, 52, 80C, 85 (w.q.) BRAZIL (Pará, Acre, Tocantins, Rondônia, Mato Grosso).
    • Type-material: holotype worker, 10 paratype workers, 2 paratype queens.
    • Type-locality: holotype Brazil: Pará, Primavera, PBA-Projeto Primavera, 01°02’48’’S, 47°9’25’’W, 16-26.xi.2013, Area/Winkler A/01 (M. Souza); paratypes: 1 worker Brazil: Acre, Mâncio Lima, P.N. da Serra do Divisor, 245 m., 7°26’58.81’’S, 73°39’37’’W, 15-18.xi.2016 (R.M. Feitosa, T.S. Silva & A.C. Ferreira), 1 queen Brazil: Tocantins, Araguacema, Snhor do Bonfim, 08°40’20’’S, 49°25’53’’W, 16-30.xi.2005, winlker (R.R. Silva & R.M. Feitosa), 2 workers with same data as last but winklers 6, 7 (Silva & Feitosa), 3 workers, 1 queen Tocantins, Babaçulândia, 07°02’19’’S, 47°52’03.4’’W, 1-9.vi.2005, winklers 4, 12. 13, 16 (R.R. Silva & R.M. Feitosa), 2 workers Rondônia, Porto Velho, Area Abunã, A9P4, 09°38’03.3’’S, 65°26’23.9’’W, 17-27.vii.2013 (G.R. Mazão & R.S. Probst), 1 worker with same data as last but Area Mutum, M7P2, 3.iii.2015, 1 worker Mato Grosso, Diamantino, Fazenda Junqueira Vilela, 11 km. NE casa, 17-18.vii.1973 (W.L. Brown).
    • Type-depositories: MZSP (holotype); DZUP, MCZC, MZSP, USNM (paratypes).
    • Distribution: Bolivia, Brazil, Ecuador, French Guiana, Peru.

Type Material

  • Holotype: BRAZIL: PA[Pará]: Primavera, PBA-Projeto Primavera, 1°02′48″S, 47°9′25″W, 16–26.xi.2013, M. Souza col., Área/Winkler A/01 (1W) (MZSP67394) [MZSP].
  • Paratypes: AC[Acre]: Mâncio Lima, P.N. da Serra do Divisor, 245m, 7°26′58.81″S, 73°39′37.83″W, 15–18.xi.2016, R.M. Feitosa, T.S. Silva & A.C. Ferreira cols. (1W) [DZUP]; TO[Tocantins]: Araguacema, Senhor do Bonfim, 08°40′20″S, 49°25′53″W, 16–30.xi.2005, Semidecídua, Silva R.R. & Feitosa R.M., Winkler (1Q) (MZSP67395) [MZSP]; same except Winkler 7 (1W) (MZSP67396) [MZSP]; Winkler 6 (1W) (MZSP67397) [MZSP]; Babaçulândia, 07°02′19″S, 47°52′03.4″W, 01–09.vi.2005, Silva R.R. & Feitosa R.M., Winkler 13 (1W) (MZSP67398) [MZSP]; same except Winkler 16 (1W covered with gold) (MZSP67399) [MZSP]; Winkler 12 (1Q) (MZSP67400) [MZSP]; Winkler 4 (1W) [USNM]; RO[Rondônia]: Porto Velho, Área Abunã, A9P4, 09°38′03.3″S, 65°26′23.9″W, 17–27.vii.2013, Mazão G.R. & Probst R.S. cols. (2W) [DZUP]; same except Área Mutum, M7P2, 09°35′41.6″S, 65°03′54.2″W, 03.iii.2015, winkler 1 (1W) (MZHY106) [MZSP]; MT[Mato Grosso]: Diamantino, Faz. Junqueira Vilela, 11km NE casa, 17–18.july.1973, W.L. Brown col. (1W) [MCZC].