I meant to write about this a couple of months ago, after reading a story similar to this The original article I read, and forgot to bookmark, focused mainly on the process of how to train a gorilla to sit still for this kind of procedure (this article touches on that a little). I’m getting ahead of myself though. Heart disease is the number one killer of great apes in captivity. Getting a handle on that issue impacts their quality of life in captivity, attempts at conservation through reintroduction of animals into the wild, and, may say something about human evolution.
The gorilla genome has been sequenced and yields some interesting insights on human evolution. The research is reported in Nature. The article is open access. Here is the abstract:
Gorillas are humans’ closest living relatives after chimpanzees, and are of comparable importance for the study of human origins and evolution. Here we present the assembly and analysis of a genome sequence for the western lowland gorilla, and compare the whole genomes of all extant great ape genera. We propose a synthesis of genetic and fossil evidence consistent with placing the human–chimpanzee and human–chimpanzee–gorilla speciation events at approximately 6 and 10 million years ago. In30%of the genome, gorilla is closer tohuman or chimpanzee than the latter are to each other; this is rarer around coding genes, indicating pervasive selection throughout great ape evolution, and has functional consequences in gene expression. A comparison of protein coding genes reveals approximately 500 genes showing accelerated evolution on each of the gorilla, human and chimpanzee lineages, and evidence for parallel acceleration, particularly of genes involved in hearing.Wealso compare the western and eastern gorilla species, estimating an average
sequence divergence time 1.75 million years ago, but with evidence for more recent genetic exchange and a population bottleneck in the eastern species. The use of the genome sequence in these and future analyses will promote a deeper understanding of great ape biology and evolution.
Species: Presbytis hosei canicrus
Common Name: Miller’s grizzled langur
Presbytis hosei canicrus is a subspecies of grey leaf monkey. It was feared to be extinct but has recently been observed in Borneo. Picture Source
Species: Parapapio broomi
The genus Parapaio is composed of four species: Parapapio jonesi, Parapapio whitei, Parapapio broomi, and Parapapio antiquus. The picture of Parapapio broomi below is that of a specimen from Bolt’s Farm and dates to about 2 MYA (the picture is somewhat distorted the snout is not as long as in a but is longer than in b. I have been unable to correct the distortion but the original picture can be found here). Parapapio broomi has also been found at Sterkfontein.
Saadanius hijazensis is a fossil primate dating to the Oligocene at somewhere around 29-28 MYA. Brian Switek has an excellent overview of the finds implications for paleoanthropology.
Subfamily: incertae sedis
Species: Anoiapithecus brevirostris
I have chosen Anoiapithecus brevirostris for this week’s “know Your Primate” because a paper on it has recently been published in the Proceedings of the Royal Society B. The paper, by Alba, Fortuny, and Moya-Sola, looks at enamel thickness in Anoiapithecus brevirostris, Pierolapithecus catalaunicus, and Dryopithecus fontani.
I”l have more about the paper later in the week. (more…)
Filed under: Anoiapithecus, Dryopithecini, Haplorrhini, Hominidae, Hominoidea, Know Your Primate, Primates | Tagged: Anoiapithecus brevirostris, Dryopithecus fontani, Pierolapithecus catalaunicus | Comments Off
Species: Pongo abelii
Common Name: Sumatran Orangutan
The sumatran orang lives, obviously, in Sumatra – they are an endemic species. According several genetic analysis the Sumatran and Bornean populations diverged from each other about 1.5-1.7 MYA. They are largely frugivorous and spend most of their time in trees. On the ground they are quadrupedal. Unlike the chimpanzee, bonobo, and gorilla, they are not knuckle walkers they use their fist. Males tend to be solitary.
Species Lophocebus aterrimus
Common Name: Black Mangabey, Black-crested Mangabey