Cheracebus

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria
Cladus: Sphenacodontia
Cladus: Sphenacodontoidea
Cladus: Therapsida
Cladus: Theriodontia
Cladus: Cynodontia
Cladus: Eucynodontia
Cladus: Probainognathia
Cladus: Prozostrodontia
Cladus: Mammaliaformes
Classis: Mammalia
Subclassis: Trechnotheria
Infraclassis: Zatheria
Supercohors: Theria
Cohors: Eutheria
Infraclassis: Placentalia
Cladus: Boreoeutheria
Superordo: Euarchontoglires
Ordo: Primates
Subordo: Haplorhini
Infraordo: Simiiformes
Parvordo: Platyrrhini

Familia: Pitheciidae
Subfamilia: Callicebinae
Genus: Cheracebus
secundum Byrne et al, 2016

Species: C. lucifer – C. lugens – C. medemi – C. purinus – C. regulus – C. torquatus
secundum Burgin et al., 2020

Species: C. lucifer – C. lugens – C. medemi – C. regulus – C. torquatus
Name

Cheracebus Byrne et al., 2016

Type species: Cheracebus lugens (Humboldt, 1811)
Etymology

"'Chera' is the Latin form of χηρα; Greek for 'widow'. 'Cebus' comes from the Greek 'kebos', which means 'long-tailed monkey'." Byrne et al., 2016
References
Primary references

Byrne, H., Rylands, A.B., Carneiro, J.C., Lynch Alfaro, J.W., Bertuol, F., da Silva, M.N.F., Messias, M., Groves, C.P., Mittermeier, R.A., Farias, I., Hrbek, T., Schneider, H., Sampaio, I. & Boubli, J.P. 2016. Phylogenetic relationships of the New World titi monkeys (Callicebus): first appraisal of taxonomy based on molecular evidence. Frontiers in Zoology 13: 10. DOI: 10.1186/s12983-016-0142-4 Open access Reference page.

Additional references

Burgin, C.J., Wilson, D.E., Mittermeier, R.A., Rylands, A.B., Lacher, T.E., Sechrest, W. 2020. Illustrated Checklist of the Mammals of the World. Lynx Edicions: Barcelona. 2 volumes. Vol 1: Monotremata to Rodentia. 631 pp. ISBN 978-84-16728-34-3. Vol 2: Eulipotyphla to Carnivora. 535 pp. ISBN 978-84-16728-35-0. Reference page. I. 194–5.

Links
Cheracebus – Taxon details on Fossilworks

Cheracebus is one of three genera of titi monkeys. Monkeys in this genus, particularly the type species Cheracebus lugens, are sometimes referred to as widow titi monkeys.[1]

Historically, titis were monogeneric, comprising only the genus Callicebus Thomas, 1903. Owing to the great diversity found across titi monkey species, a new genus-level taxonomy was recently proposed that recognises three genera within the subfamily Callicebinae; Cheracebus Byrne et al., 2016 for the species of the torquatus group (Widow titis); Plecturocebus Byrne et al., 2016 for the Amazonian and Chaco titis of the moloch and donacophilus groups; and Callicebus Thomas, 1903 sensu stricto, for species of the Atlantic Forest personatus group.[1]

Cheracebus is derived from the Latin chera (from the Greek χηρα) meaning widow and cebus (from the Greek kebos) meaning long tailed monkey.[1]
Species

There are 5 species in this genus:

Lucifer titi monkey, Cheracebus lucifer
Black titi monkey, Cheracebus lugens
Colombian black-handed titi monkey, Cheracebus medemi
Red-headed titi monkey, Cheracebus regulus
Collared titi monkey, Cheracebus torquatus

Cheracebus species
References

Byrne, Hazel; Rylands, Anthony B.; Carneiro, Jeferson C.; Alfaro, Jessica W. Lynch; Bertuol, Fabricio; da Silva, Maria N. F.; Messias, Mariluce; Groves, Colin P.; Mittermeier, Russell A. (2016-01-01). "Phylogenetic relationships of the New World titi monkeys (Callicebus): first appraisal of taxonomy based on molecular evidence". Frontiers in Zoology. 13: 10. doi:10.1186/s12983-016-0142-4. ISSN 1742-9994. PMC 4774130. PMID 26937245.