Eastern Sumatran lavender
| Eastern Sumatran lavender | ||||||||||||
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| Presbytis percura | ||||||||||||
| Lyon , 1908 |
The Ostsumatra-Banded Surili ( Presbytis percura ) is a type of surili that the east of the Indonesian island of Sumatra (province of Riau ) in a small area between the rivers Rokam and Siak occurs.
features
The animals are blackish on the back, have a gray head and a white underside. Throat and face are gray. The white color on the belly side is narrow, but extends to the throat and under the chin, as well as narrow stripes on the insides of the arms to the wrists and legs to the ankles.
Systematics
The East Sumatran lavender was first scientifically described in 1908 by the American zoologist Marcus Ward Lyon . Until June 2020 it was considered to be one of the subspecies of the banded langur ( Presbytis femoralis ). Its distribution area is, however, geographically separated from that of the nominate form , which only occurs in the extreme south of the Malay Peninsula , and it differs significantly from this in molecular biology ( mtDNA , cyt-b and D-Loop ). The East Sumatran langur and Raffles' bandit langur separated from one another evolutionarily about 2.6 million years ago. In June 2020, the East Sumatran lavender got the status of an independent species.
Danger
Since the animals are now only found in a few, isolated forest islands in a very small area, the population must be viewed as critically endangered according to the criteria of the IUCN (International Union for Conservation of Nature). The province of Riau has the highest rate of deforestation in Sumatra and between 1985 and 2008 63% of the original rainforest was destroyed. The population of the East Sumatran langur has probably decreased by 80% during this time.
supporting documents
- ↑ D. Zinner, GH Fickenscher & C. Roos: Family Cercopithecidae (Old World monkeys). Page 715 in Russell A. Mittermeier , Anthony B. Rylands & Don E. Wilson : Handbook of the Mammals of the World - Volume 3: Primates. Lynx Edicions, 2013 ISBN 978-8496553897
- ↑ Muhammad Abu Bakar Abdul-Latiff, Hanisah Baharuddin, Pazil Abdul-Patah & Badrul Munir Md-Zain: Is Malaysia's banded langur, Presbytis femoralis femoralis, actually Presbytis neglectus neglectus? Taxonomic revision with new insights on the radiation history of the Presbytis species group in Southeast Asia. Primates. 60 (1): 63-79. doi: 10.1007 / s10329-018-0699-y
- ↑ a b Andie Ang, Dewi Imelda Roesma, Vincent Nijman, Rudolf Meier, Amrita Srivathsan and Rizaldi. 2020. Faecal DNA to the Rescue: Shotgun Sequencing of Non-invasive Samples reveals Two Subspecies of Southeast Asian Primates to be Critically Endangered Species. Scientific Reports. 10, 9396. DOI: 10.1038 / s41598-020-66007-8