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Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Cladus: Eureptilia
Cladus: Romeriida
Subclassis: Diapsida
Cladus: Sauria
Infraclassis: Archosauromorpha
Cladus: Crurotarsi
Divisio: Archosauria
Subsectio: Ornithodira
Subtaxon: Dinosauromorpha
Cladus: Dinosauria
Ordo: Saurischia
Cladus: Theropoda
Cladus: Neotheropoda
Infraclassis: Aves
Ordo: Passeriformes
Subordo: Tyranni
Infraordo: Tyrannides
Parvordo: Thamnophilida

Familia: Thamnophilidae
Genus: Frederickena
Species: F. fulva –
F. unduliger - F. viridis Name

Frederickena Chubb, 1918

Typus: Thamnophilus viridis Vieillot, 1816 = Frederickena viridis

References
Primary references

Chubb, C. 1918. Descriptions of new Genera and a new Subspecies of South American Birds. Annals and Magazine of Natural History (9)2 no.7: 122–124. BHL Reference page. Original description p. 123 BHL

Additional references

Isler, M.L., Isler, P.R, Whitney, B.M., Zimmer, K.J. & Whittaker, A. 2009. Species limits in antbirds (Aves: Passeriformes: Thamnophilidae): an evaluation of Frederickena unduligera (Undulated Antshrike) based on vocalizations. Zootaxa, 2305: 61-68. Full article viewReference page.

Vernacular names
suomi: Isomuurat

Frederickena is a genus of passerine birds in the antbird family, Thamnophilidae. These are among the largest antbirds, and are native to the Guianas and Amazon Rainforest in South America. They are infrequently seen and generally found at very low densities.

The genus contains three species:[1]

Black-throated antshrike, Frederickena viridis
Undulated antshrike, Frederickena unduliger
Fulvous antshrike, Frederickena fulva

The fulvous antshrike was previously considered as a subspecies of the undulated antshrike but was promoted to species status based on a 2009 study of the vocalization.[1][2][3]
References

Gill, Frank; Donsker, David, eds. (2017). "Antbirds". World Bird List Version 8.1. International Ornithologists' Union. Retrieved 4 February 2018.
Isler, M.L.; Isler, P.R.; Whitney, B.M.; Zimmer, K.J.; Whittaker, A. (2009). "Species limits in antbirds (Aves: Passeriformes: Thamnophilidae): an evaluation of Frederickena unduligera (Undulated Antshrike) based on vocalizations". Zootaxa. 2305: 61–68.
"Proposal (431): Split Frederickena unduligera into two species". South American Classification Committee of the American Ornithological Society. April 2010. Retrieved 6 February 2018.

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