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| genus = Plecturocebus
| genus = Plecturocebus
| species = bernhardi
| species = bernhardi
| authority = ([[Marc van Roosmalen|van Roosmalen]], van Roosmalen and Mittermeier, 2002)
| authority = ([[Marc van Roosmalen|van Roosmalen]], van Roosmalen and [[Russell Mittermeier|Mittermeier]], 2002)
| range_map = Callicebus bernhardi distribution.svg
| range_map = Callicebus bernhardi distribution.svg
| range_map_caption = Geographic range
| range_map_caption = Geographic range
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}}
}}


'''Prince Bernhard's titi monkey''' (''Plecturocebus bernhardi''), also called the '''zog-zog monkey''',<ref>https://books.google.ie/books?id=amVFAQAAIAAJ&q=%22zog+zog+%22+monkey&dq=%22zog+zog+%22+monkey&hl=en&sa=X&ved=2ahUKEwiW2Ii115r8AhWLEMAKHWIhC7MQ6AF6BAgEEAI</ref><ref>https://www.theregister.com/2007/11/06/giant_peccary/</ref><ref>https://www.telegraph.co.uk/news/earth/earthnews/3313074/Biologist-discovers-new-giant-wild-pig-species.html</ref> is a [[species]] of [[titi monkey]] in the genus ''[[Plecturocebus]]'', first described in 2002. It is named after [[Prince Bernhard of the Netherlands]]. They have varying coloration of gray, black, and [[agouti (coloration)|agouti]], with dark orange in certain regions. They are endemic to [[Brazil]], found mostly in [[Forest dynamics#Disturbance|disturbed forest]] environments. While officially listed as [[least-concern]] by the [[International Union for the Conservation of Nature]] (IUCN), they may, in fact, be at-risk due to human-caused [[deforestation]].
'''Prince Bernhard's titi monkey''' ('''''Plecturocebus bernhardi'''''), also called the '''zog-zog monkey''',<ref>{{Cite book|url=https://books.google.com/books?id=amVFAQAAIAAJ&q=%22zog+zog+%22+monkey|title=The New Zoo: New and Rediscovered Animals of the Twentieth Century|first=Karl|last=Shuker|date=December 27, 2002|publisher=House of Stratus|isbn=9781842325612 |via=Google Books}}</ref><ref>{{Cite web|url=https://www.theregister.com/2007/11/06/giant_peccary/|title=Biologist 'discovers' scentless giant peccary|first=Lester|last=Haines|website=www.theregister.com}}</ref><ref>{{Cite web|url=https://www.telegraph.co.uk/news/earth/earthnews/3313074/Biologist-discovers-new-giant-wild-pig-species.html|title=Biologist discovers new giant wild pig species|website=www.telegraph.co.uk}}</ref> is a [[species]] of [[titi monkey]] in the genus ''[[Plecturocebus]]'', first described in 2002. It is named after [[Prince Bernhard of the Netherlands]]. They have varying coloration of gray, black, and [[agouti (coloration)|agouti]], with dark orange in certain regions. They are endemic to [[Brazil]], found mostly in [[Forest dynamics#Disturbance|disturbed forest]] environments. While officially listed as [[least-concern]] by the [[International Union for the Conservation of Nature]] (IUCN), they may, in fact, be at-risk due to human-caused [[deforestation]].


==Etymology and taxonomy==
==Etymology and taxonomy==
The species is known to locals of the regions it inhabits as a ''zog-zog'' or ''zogue-zogue'';<ref name=Roosmalen/> however, that name has also been applied to the [[coppery titi monkey]] (''Plecturocebus cupreus'').<ref>https://books.google.ie/books?id=JoZtAAAAMAAJ&pg=PA57&dq=%22zog+zog+monkey%22&hl=en&sa=X&ved=2ahUKEwj4lYaN15r8AhVLhFwKHVZCB-4Q6AF6BAgIEAI#v=onepage&q=%22zog%20zog%20monkey%22&f=false</ref> Its [[English language|English]] [[common name]] was selected in honor of [[Prince Bernhard of the Netherlands]], who created the [[Order of the Golden Ark]], an award equivalent to [[knighthood]], presented each year to a group of [[conservationists]].<ref name=Roosmalen/>
The species is known to locals of the regions it inhabits as a ''zog-zog'' or ''zogue-zogue'';<ref name=Roosmalen/> however, that name has also been applied to the [[coppery titi monkey]] (''Plecturocebus cupreus'').<ref>{{Cite web|url=https://books.google.com/books?id=JoZtAAAAMAAJ&dq=%22zog+zog+monkey%22&pg=PA57|title=Index-catalogue of Medical and Veterinary Zoology: Supplement: Parasite-subject catalogue|date=December 27, 1978|publisher=U.S. Government Printing Office|via=Google Books}}</ref> Its [[English language|English]] [[common name]] was selected in honor of [[Prince Bernhard of the Netherlands]], who created the [[Order of the Golden Ark]], an award equivalent to [[knighthood]], presented each year to a group of [[conservationists]].<ref name=Roosmalen/>


Prince Bernhard's titi monkey belongs to the genus ''[[Plecturocebus]]''. It was originally described by [[Marc van Roosmalen]] ''et al.'' in 2002 as ''Callicebus bernhardi'', with the [[holotype]] being a complete, mature [[skeleton]], collected in November 1998.<ref name=Roosmalen/> It and ''[[Callicebus stephennashi]]'' were the 37th and 38th species of [[primates]] to be described since 1990,<ref name="ap" /> and the 23rd and 24th monkeys described since that year.<ref>{{cite news |title=Two New Monkey Species Discovered; Primates Found In Brazil's Amazon Rain Forest |url=https://www.sciencedaily.com/releases/2002/06/020625063029.htm |access-date=30 November 2022 |work=ScienceDaily |agency=[[ScienceDaily]] |date=26 June 2002 |language=en}}</ref> Van Roosmalen explained how the area where it is found is filled with undescribed species.<ref name="ap">{{cite news |last1=Michael |first1=Astor |title=Two new Amazon monkey species discovered |url=https://www.primates.com/monkeys/newspecies.html |access-date=30 November 2022 |work=www.primates.com |publisher=[[Associated Press]] |date=23 June 2002}}</ref> In 2016, the genus was split into four new genera, with ''bernhardi'' ending up in the ''moloch'' group of the newly created genus ''Plecturocebus''. Other members of that group include ''[[Plecturocebus moloch|P. moloch]]'', ''[[Plecturocebus cinerascens|P. cinerascens]]'', ''[[Plecturocebus hoffmannsi|P. hoffmannsi]]'', ''[[Plecturocebus baptista|P. baptista]]'', and ''[[Plecturocebus brunneus|P. brunneus]]''.<ref>{{cite journal |last1=Byrne |first1=H |last2=Rylands |first2=AB |last3=Carneiro |first3=JC |last4=Alfaro |first4=JW |last5=Bertuol |first5=F |last6=da Silva |first6=MN |last7=Messias |first7=M |last8=Groves |first8=CP |last9=Mittermeier |first9=RA |last10=Farias |first10=I |last11=Hrbek |first11=T |last12=Schneider |first12=H |last13=Sampaio |first13=I |last14=Boubli |first14=JP |title=Phylogenetic relationships of the New World titi monkeys (Callicebus): first appraisal of taxonomy based on molecular evidence. |journal=Frontiers in Zoology |date=2016 |volume=13 |pages=10 |doi=10.1186/s12983-016-0142-4 |pmid=26937245 |pmc=4774130 |language=en |issn=1742-9994}}</ref>
Prince Bernhard's titi monkey belongs to the genus ''[[Plecturocebus]]''. It was originally described by [[Marc van Roosmalen]] ''et al.'' in 2002 as ''Callicebus bernhardi'', with the [[holotype]] being a complete, mature [[skeleton]], collected in November 1998.<ref name=Roosmalen/> It and ''[[Callicebus stephennashi]]'' were the 37th and 38th species of [[primates]] to be described since 1990,<ref name="ap" /> and the 23rd and 24th monkeys described since that year.<ref>{{cite news |title=Two New Monkey Species Discovered; Primates Found In Brazil's Amazon Rain Forest |url=https://www.sciencedaily.com/releases/2002/06/020625063029.htm |access-date=30 November 2022 |work=ScienceDaily |agency=[[ScienceDaily]] |date=26 June 2002 |language=en}}</ref> Van Roosmalen explained how the area where it is found is filled with undescribed species.<ref name="ap">{{cite news |last1=Michael |first1=Astor |title=Two new Amazon monkey species discovered |url=https://www.primates.com/monkeys/newspecies.html |access-date=30 November 2022 |work=www.primates.com |publisher=[[Associated Press]] |date=23 June 2002}}</ref> In 2016, the genus was split into four new genera, with ''bernhardi'' ending up in the ''moloch'' group of the newly created genus ''Plecturocebus''. Other members of that group include ''[[Plecturocebus moloch|P. moloch]]'', ''[[Plecturocebus cinerascens|P. cinerascens]]'', ''[[Plecturocebus hoffmannsi|P. hoffmannsi]]'', ''[[Plecturocebus baptista|P. baptista]]'', and ''[[Plecturocebus brunneus|P. brunneus]]''.<ref>{{cite journal |last1=Byrne |first1=H |last2=Rylands |first2=AB |last3=Carneiro |first3=JC |last4=Alfaro |first4=JW |last5=Bertuol |first5=F |last6=da Silva |first6=MN |last7=Messias |first7=M |last8=Groves |first8=CP |last9=Mittermeier |first9=RA |last10=Farias |first10=I |last11=Hrbek |first11=T |last12=Schneider |first12=H |last13=Sampaio |first13=I |last14=Boubli |first14=JP |title=Phylogenetic relationships of the New World titi monkeys (Callicebus): first appraisal of taxonomy based on molecular evidence. |journal=Frontiers in Zoology |date=2016 |volume=13 |pages=10 |doi=10.1186/s12983-016-0142-4 |pmid=26937245 |pmc=4774130 |language=en |issn=1742-9994 |doi-access=free }}</ref>


== Description ==
== Description ==
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==Behavior==
==Behavior==
===Diet===
===Diet===
Prince Bernhard's titi monkeys have been observed feeding on the fruits of ''[[Oenocarpus distichus]]'' and ''[[Orbignya phalerata]]'', younger leaves and fruit of plants of the genus ''[[Inga]]'', and [[shrubs]] and lianas of unknown classification.<ref>{{cite journal |last1=Quintino |first1=Erika Patrícia |last2=Bicca-Marques |first2=Júlio César |title=Occurrence of Callicebus bernhardi in Rolim De Moura, Rondônia, Brazil |journal=Neotropical Primates |date=June 2013 |volume=20 |issue=1 |pages=62–63 |doi=10.1896/044.020.0114 |s2cid=87317113 |url=https://www.researchgate.net/publication/270905315 |access-date=27 October 2022}}</ref>
Prince Bernhard's titi monkeys have been observed feeding on the fruits of ''[[Oenocarpus distichus]]'' and ''[[Orbignya phalerata]]'', younger leaves and fruit of plants of the genus ''[[Inga]]'', and [[shrubs]] and lianas of unknown classification.<ref>{{cite journal |last1=Quintino |first1=Erika Patrícia |last2=Bicca-Marques |first2=Júlio César |title=Occurrence of Callicebus bernhardi in Rolim De Moura, Rondônia, Brazil |journal=Neotropical Primates |date=June 2013 |volume=20 |issue=1 |pages=62–63 |doi=10.1896/044.020.0114 |s2cid=87317113 |url=https://www.researchgate.net/publication/270905315 |access-date=27 October 2022|doi-access=free }}</ref>


===Vocalizations===
===Vocalizations===
Line 41: Line 41:


===Thermoregulation===
===Thermoregulation===
To keep their metabolism functioning as it should Prince Bernhard's titi monkeys practice [[thermoregulation]] behaviors when they are not at their ideal temperature to keep their metabolism in balance. In higher levels of heat, especially over {{convert|31|C|F}}, they avoid sunny places, although they begin to use heat-dissipating postures at as low as {{convert|27|C|F}}. Higher levels of [[humidity]] also lead to a greater use of these behaviors. While individuals huddle together in the night, with tails entwined, this behavior does not correlate to temperature, suggesting it is instead practiced to satisfy social needs.<ref name=thermoregulation>{{cite journal |last1=Lopes |first1=Karine G.D. |last2=Bicca-Marques |first2=Júlio César |title=Ambient temperature and humidity modulate the behavioural thermoregulation of a small arboreal mammal ( Callicebus bernhardi ) |journal=Journal of Thermal Biology |date=October 2017 |volume=69 |pages=104–109 |doi=10.1016/j.jtherbio.2017.06.010 |pmid=29037369 |url=https://www.sciencedirect.com/science/article/pii/S030645651730075X |access-date=27 October 2022 |issn=0306-4565}}</ref>
To keep their metabolism functioning as it should Prince Bernhard's titi monkeys practice [[thermoregulation]] behaviors when they are not at their ideal temperature to keep their metabolism in balance. In higher levels of heat, especially over {{convert|31|C|F}}, they avoid sunny places, although they begin to use heat-dissipating postures at as low as {{convert|27|C|F}}. Higher levels of [[humidity]] also lead to a greater use of these behaviors. While individuals huddle together in the night, with tails entwined, this behavior does not correlate to temperature, suggesting it is instead practiced to satisfy social needs.<ref name=thermoregulation>{{cite journal |last1=Lopes |first1=Karine G.D. |last2=Bicca-Marques |first2=Júlio César |title=Ambient temperature and humidity modulate the behavioural thermoregulation of a small arboreal mammal ( Callicebus bernhardi ) |journal=Journal of Thermal Biology |date=October 2017 |volume=69 |pages=104–109 |doi=10.1016/j.jtherbio.2017.06.010 |pmid=29037369 |url=https://www.sciencedirect.com/science/article/pii/S030645651730075X |access-date=27 October 2022 |issn=0306-4565|url-access=subscription }}</ref>


== Conservation ==
== Conservation ==
The Prince Bernhard's titi monkey is of [[least-concern]] by the [[International Union for Conservation of Nature]] (IUCN). The organization considered it to not be at risk due to its large range and lack of [[Human impact on the environment|human impact]] on its habitat. They concluded that it has a stable population and no known threats.<ref name=iucn/> However, later research efforts found that its habitat, in the [[Arc of Deforestation]] (an area in the southeastern [[Amazon rainforest]] defined by heavy [[deforestation]]), was at risk. It is estimated that it will lose 44.5 percent of its current range over the course of the next 24 years (three generations for this species). From this study, the researchers concluded that its status should be changed to [[vulnerable species|vulnerable]].<ref name="pop surveys">{{cite journal |last1=Silva |first1=Felipe Ennes |last2=Pacca |first2=Luciana Gosi |last3=Lemos |first3=Lisley Pereira |last4=Gusmão |first4=Almério Câmara |last5=Silva |first5=Odair Diogo da |last6=Dalponte |first6=Júlio César |last7=Franco |first7=Caetano L. B. |last8=Santana |first8=Marcelo Ismar |last9=Buss |first9=Gerson |last10=Bizri |first10=Hani R. El |title=Using population surveys and models to reassess the conservation status of an endemic Amazonian titi monkey in a deforestation hotspot |journal=Oryx |date=29 September 2022 |volume=56 |issue=6 |pages=846–853 |doi=10.1017/S0030605322000655 |s2cid=252637279 |url=https://www.cambridge.org/core/journals/oryx/article/using-population-surveys-and-models-to-reassess-the-conservation-status-of-an-endemic-amazonian-titi-monkey-in-a-deforestation-hotspot/D7DA56E269C62FBA2CA328397F59E317|access-date=26 October 2022}}</ref>
The Prince Bernhard's titi monkey is of [[least-concern]] by the [[International Union for Conservation of Nature]] (IUCN). The organization considered it to not be at risk due to its large range and lack of [[Human impact on the environment|human impact]] on its habitat. They concluded that it has a stable population and no known threats.<ref name=iucn/> However, later research efforts found that its habitat, in the [[Arc of Deforestation]] (an area in the southeastern [[Amazon rainforest]] defined by heavy [[deforestation]]), was at risk. It is estimated that it will lose 44.5 percent of its current range over the course of the next 24 years (three generations for this species). From this study, the researchers concluded that its status should be changed to [[vulnerable species|vulnerable]].<ref name="pop surveys">{{cite journal |last1=Silva |first1=Felipe Ennes |last2=Pacca |first2=Luciana Gosi |last3=Lemos |first3=Lisley Pereira |last4=Gusmão |first4=Almério Câmara |last5=Silva |first5=Odair Diogo da |last6=Dalponte |first6=Júlio César |last7=Franco |first7=Caetano L. B. |last8=Santana |first8=Marcelo Ismar |last9=Buss |first9=Gerson |last10=Bizri |first10=Hani R. El |title=Using population surveys and models to reassess the conservation status of an endemic Amazonian titi monkey in a deforestation hotspot |journal=Oryx |date=29 September 2022 |volume=56 |issue=6 |pages=846–853 |doi=10.1017/S0030605322000655 |s2cid=252637279 |doi-access=free |hdl=10919/114971 |hdl-access=free }}</ref>


==References==
==References==
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[[Category:Plecturocebus|Prince Bernhard's titi]]
[[Category:Plecturocebus|Prince Bernhard's titi]]
[[Category:Mammals of Brazil]]
[[Category:Primates of Brazil]]
[[Category:Endemic fauna of Brazil]]
[[Category:Endemic mammals of Brazil]]
[[Category:Mammals described in 2002|Prince Bernhard's titi]]
[[Category:Mammals described in 2002|Prince Bernhard's titi]]
[[Category:Taxa named by Marc van Roosmalen]]
[[Category:Taxa named by Russell Mittermeier]]

Latest revision as of 17:52, 6 April 2024

Prince Bernhard's titi monkey
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Suborder: Haplorhini
Infraorder: Simiiformes
Family: Pitheciidae
Genus: Plecturocebus
Species:
P. bernhardi
Binomial name
Plecturocebus bernhardi
(van Roosmalen, van Roosmalen and Mittermeier, 2002)
Geographic range
Synonyms

Callicebus bernhardi van Roosmalen, van Roosmalen and Mittermeier, 2002, 2002

Prince Bernhard's titi monkey (Plecturocebus bernhardi), also called the zog-zog monkey,[2][3][4] is a species of titi monkey in the genus Plecturocebus, first described in 2002. It is named after Prince Bernhard of the Netherlands. They have varying coloration of gray, black, and agouti, with dark orange in certain regions. They are endemic to Brazil, found mostly in disturbed forest environments. While officially listed as least-concern by the International Union for the Conservation of Nature (IUCN), they may, in fact, be at-risk due to human-caused deforestation.

Etymology and taxonomy

[edit]

The species is known to locals of the regions it inhabits as a zog-zog or zogue-zogue;[5] however, that name has also been applied to the coppery titi monkey (Plecturocebus cupreus).[6] Its English common name was selected in honor of Prince Bernhard of the Netherlands, who created the Order of the Golden Ark, an award equivalent to knighthood, presented each year to a group of conservationists.[5]

Prince Bernhard's titi monkey belongs to the genus Plecturocebus. It was originally described by Marc van Roosmalen et al. in 2002 as Callicebus bernhardi, with the holotype being a complete, mature skeleton, collected in November 1998.[5] It and Callicebus stephennashi were the 37th and 38th species of primates to be described since 1990,[7] and the 23rd and 24th monkeys described since that year.[8] Van Roosmalen explained how the area where it is found is filled with undescribed species.[7] In 2016, the genus was split into four new genera, with bernhardi ending up in the moloch group of the newly created genus Plecturocebus. Other members of that group include P. moloch, P. cinerascens, P. hoffmannsi, P. baptista, and P. brunneus.[9]

Description

[edit]
Illustration of various titi monkeys; the furthest toward the upper right is this species

C. bernhardi has dark orange sideburns, underparts, and inner limbs (of a more uniform shade than P. cinerascens). The upper regions of its body and head are grayish black, while on its back, these shades are mixed with brownish agouti or reddish brown. Its face is black, with white hairs around its nose and mouth. Its ears are also black, with whitish tufts. Its mostly black tail is contrasted by a white tip. Its hairs are 5 centimetres (2.0 in) long. Its grayish forehead and crown help distinguish it from P. brunneus, which is dark brown to black in these areas, while the white ear tufts and tail tip distinguish it from P. hoffmannsil and P. baptista. Its lack of black vibrissae (whiskers) sets it apart from P. dubius.[5]

Distribution and habitat

[edit]

Distribution

[edit]

The Prince Bernhard's titi monkey is endemic to Brazil, specifically the states of Amazonas and Rondônia, and possibly Mato Grosso, although its presence in the third is uncertain, having possibly been sighted in Alta Floresta. It is found between the Madeira and Aripuanã rivers. The range of P. bernhardi overlaps with those of P. cinerascens and P. hoffmannsi at the headwaters of the Juruena, Aripuanã, and Roosevelt rivers. They occur in protected areas, including Ipixuna Indigenous Land.[1]

Habitat

[edit]

P. bernhardi prefer to live in disturbed forest, either naturally disturbed or disturbed by humans. Specifically, they enjoy to live in blow-downs (swathes of secondary forest affected by massive storms), liana forests, forests near plantations and fields, and seringais. Seringais are a type of agroforestry where forests grow along white-water rivers. Commercially important trees in these forests include rubber, Brazil nut, and cacao.[5]

Behavior

[edit]

Diet

[edit]

Prince Bernhard's titi monkeys have been observed feeding on the fruits of Oenocarpus distichus and Orbignya phalerata, younger leaves and fruit of plants of the genus Inga, and shrubs and lianas of unknown classification.[10]

Vocalizations

[edit]

In the early morning, before dawn, all the pairs in one area often begin to perform duet calls together.[5]

Thermoregulation

[edit]

To keep their metabolism functioning as it should Prince Bernhard's titi monkeys practice thermoregulation behaviors when they are not at their ideal temperature to keep their metabolism in balance. In higher levels of heat, especially over 31 °C (88 °F), they avoid sunny places, although they begin to use heat-dissipating postures at as low as 27 °C (81 °F). Higher levels of humidity also lead to a greater use of these behaviors. While individuals huddle together in the night, with tails entwined, this behavior does not correlate to temperature, suggesting it is instead practiced to satisfy social needs.[11]

Conservation

[edit]

The Prince Bernhard's titi monkey is of least-concern by the International Union for Conservation of Nature (IUCN). The organization considered it to not be at risk due to its large range and lack of human impact on its habitat. They concluded that it has a stable population and no known threats.[1] However, later research efforts found that its habitat, in the Arc of Deforestation (an area in the southeastern Amazon rainforest defined by heavy deforestation), was at risk. It is estimated that it will lose 44.5 percent of its current range over the course of the next 24 years (three generations for this species). From this study, the researchers concluded that its status should be changed to vulnerable.[12]

References

[edit]
  1. ^ a b c Röhe, F.; Boubli, J.P. (2018). "Plecturocebus bernhardi". IUCN Red List of Threatened Species. 2018: e.T41561A17973161. doi:10.2305/IUCN.UK.2018-2.RLTS.T41561A17973161.en. Retrieved 19 November 2021.
  2. ^ Shuker, Karl (December 27, 2002). The New Zoo: New and Rediscovered Animals of the Twentieth Century. House of Stratus. ISBN 9781842325612 – via Google Books.
  3. ^ Haines, Lester. "Biologist 'discovers' scentless giant peccary". www.theregister.com.
  4. ^ "Biologist discovers new giant wild pig species". www.telegraph.co.uk.
  5. ^ a b c d e f Van Roosmalen, Marc G. M.; Van Roosmalen, Tomas; Mittermeier, Russell A. (2002). "A taxonomic review of the titi monkeys, genus Callicebus Thomas, 1903, with the description of two new species, Callicebus bernhardi and Callicebus stephennashi, from Brazilian Amazonia" (PDF). Neotropical Primates. 10 (suppl): 24-30. CiteSeerX 10.1.1.177.4220. Archived from the original on 27 October 2022.
  6. ^ "Index-catalogue of Medical and Veterinary Zoology: Supplement: Parasite-subject catalogue". U.S. Government Printing Office. December 27, 1978 – via Google Books.
  7. ^ a b Michael, Astor (23 June 2002). "Two new Amazon monkey species discovered". www.primates.com. Associated Press. Retrieved 30 November 2022.
  8. ^ "Two New Monkey Species Discovered; Primates Found In Brazil's Amazon Rain Forest". ScienceDaily. ScienceDaily. 26 June 2002. Retrieved 30 November 2022.
  9. ^ Byrne, H; Rylands, AB; Carneiro, JC; Alfaro, JW; Bertuol, F; da Silva, MN; Messias, M; Groves, CP; Mittermeier, RA; Farias, I; Hrbek, T; Schneider, H; Sampaio, I; Boubli, JP (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. ISSN 1742-9994. PMC 4774130. PMID 26937245.
  10. ^ Quintino, Erika Patrícia; Bicca-Marques, Júlio César (June 2013). "Occurrence of Callicebus bernhardi in Rolim De Moura, Rondônia, Brazil". Neotropical Primates. 20 (1): 62–63. doi:10.1896/044.020.0114. S2CID 87317113. Retrieved 27 October 2022.
  11. ^ Lopes, Karine G.D.; Bicca-Marques, Júlio César (October 2017). "Ambient temperature and humidity modulate the behavioural thermoregulation of a small arboreal mammal ( Callicebus bernhardi )". Journal of Thermal Biology. 69: 104–109. doi:10.1016/j.jtherbio.2017.06.010. ISSN 0306-4565. PMID 29037369. Retrieved 27 October 2022.
  12. ^ Silva, Felipe Ennes; Pacca, Luciana Gosi; Lemos, Lisley Pereira; Gusmão, Almério Câmara; Silva, Odair Diogo da; Dalponte, Júlio César; Franco, Caetano L. B.; Santana, Marcelo Ismar; Buss, Gerson; Bizri, Hani R. El (29 September 2022). "Using population surveys and models to reassess the conservation status of an endemic Amazonian titi monkey in a deforestation hotspot". Oryx. 56 (6): 846–853. doi:10.1017/S0030605322000655. hdl:10919/114971. S2CID 252637279.


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