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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
Cladus: Euavialae
Cladus: Avebrevicauda
Cladus: Pygostylia
Cladus: Ornithothoraces
Cladus: Euornithes
Cladus: Ornithuromorpha
Cladus: Ornithurae
Cladus: Carinatae
Parvclassis: Neornithes
Cohors: Neognathae
Ordo: Piciformes

Familia: Picidae
Subfamilia: Picumninae
Genus: Sasia
Species: S. abnormis – S. africana – S. ochracea
Name

Sasia Hodgson, 1837
Typus

Sasia ochracea Hodgson, 1837
References
The Journal of the Asiatic Society of Bengal 5(1836) p. 778

Sasia is a genus of birds in the family Picidae, that are native to the Old World. They are very small, virtually tailless woodpeckers, with a crombec or nuthatch-like appearance and foraging habits. Their habitat is forest and secondary growth.[1]

All three species have a flesh orbital ring and a rounded (in cross-section) upper mandible.[2] The African species has only eight rectrices but four toes in a zygodactyl arrangement (a weak first digit), while the two Asian species have ten rectrices and only three toes (absent first digit, or hallux).[2] In addition the African species differs from the Asian species in plumage colour of the adult, but not at all in plumage pattern, body anatomy or in habits.[3]

Their relationship with genus Picumnus has not been established, and the Picumninae may be either monophyletic[4] or paraphyletic.[5]
Species

It contains the following species:

African piculet (Sasia africana) – moist African tropics
Rufous piculet (Sasia abnormis) – mainly Malaysia and Indonesia
White-browed piculet (Sasia ochracea) – mainland Southeast Asia

Gallery

Sasia ochracea
by Gould & Richter
Close-up of the head
and tail of S. abnormis

References

Stevenson, Terry; Fanshawe, John (2001). Field guide to the birds of East Africa: Kenya, Tanzania, Uganda, Rwanda, Burundi. London: T. & A.D. Poyser. pp. 280–281. ISBN 9780856610790.
Gorman, Gerard (2014). Woodpeckers of the World: The Complete Guide (Helm Photographic Guides). London: Bloomsbury. p. 88. ISBN 978-1408147153.
Delacour, J. (January 1951). "The significance of the number of toes in some woodpeckers and kingfishers" (PDF). The Auk (American Ornithological Society). 68 (1): 49–51. doi:10.2307/4080797. JSTOR 4080797. Retrieved 20 September 2018.
Benz et al., 2006; Dufort, 2015; Webb and Moore, 2005
Winkler et al., 2014

Birds Images

Biology Encyclopedia

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