Ronald John Clarke is a paleoanthropologist most notable for the discovery of "Little Foot", an extraordinarily complete skeleton of Australopithecus, in the Sterkfontein Caves.[1] A more technical description of various aspects of his description of the Australopithecus skeleton was published in the Journal of Quaternary Science.[2]
Ronald J. Clarke | |
|---|---|
 Ronald Clarke in 2015 | |
| Scientific career | |
| Fields | Paleoanthropology |
| Institutions | Johann Wolfgang Goethe University of Frankfurt am Main University of the Witwatersrand |
| Website | www |
He also discovered the Homo ergaster partial cranium SK 847.[3] He also played a role in the discovery of a new skeleton of Homo habilis related to Homo rudolfensis.[4]
He was associated with the University of the Witwatersrand, then joined Johann Wolfgang Goethe University of Frankfurt am Main in Frankfurt, Germany where he continued his work excavating "Little Foot".[5] He later rejoined the University of the Witwatersrand's Institute for Human Evolution, where he remains as of present.
Discoveries
editEarly discoveries
editIn the late 1970s, Ronald J. Clarke made discoveries of early Hominins in the Swartkrans cave in South Africa. He discovered the partial cranium of specimen SK46 and SK 879. Clarke used the temporal bones of these specimens to compare them to similar bones in chimpanzees and other apes. Clarke had also discovered the SK 848 specimen, which had an ear that was far distinct from Homo sapiens.[6]
Discovering Little Foot
editRonald J. Clarke and his expedition team explored the Sterkfontein Cave, located 40 kilometers from the capital of South Africa, Johannesburg. After years of excavating and exploring, in 1994, Clarke made a profound discovery after finding four Australopithecus bones that were joined together. The discovery that these four bones were fragments of a foot led the excavation team to nickname their finding "Little Foot". Three years later, Clarke’s excavation team were able to find more fragments of "Little Foot", which included the tibia and other parts of the legs. After this discovery, Clarke and his team excavated the rest of the cave in order to find the missing fragments of "Little Foot". Throughout the years excavating, Clarke was able to nearly fully assemble the Australopithecus skeleton in the Sterkfontein Cave.[7]
Early excavations
editRonald J. Clarke excavated the Sterkfontein Cave with two South African anthropologists, Nkwane Molefe and Stephen Motsumi in 1994. Clarke used hammers and chisels in order to extract additional fragments of "Little Foot". After finding two large fragments of the lower leg, Clarke became convinced that the rest of the fragments were located within the Silberberg Grotto of the Sterkfontein Cave. He chiseled away at the breccia inside the Silberberg Grotto and found a hominid humerus. After finding the humerus, a cast was made and the team continued to search for more bones. Two assistants took the casts around the cave to try and find a match to the ends. After searching deeper in the cave, the team was able to discover more bones encased in the breccia. A mandible was found still attached to the cranium. These bones allowed him to conclude that the mandible had ape-like features and that there were likely other limb bones deeper in the breccia. He soon after found a portion of the skull of "Little Foot". The skull that Clarke discovered was the most complete skull of an Australopithecus up to that point. From these bones, Clarke was able to conclude that the skeleton was approximately 3.5 million years old.[8]
Genus name and designation
editClarke assigned the "Little Foot" bones to the specimen Stw 573 and categorized this Australopithecus as belonging to the Australopithecus africanus species. Clarke believed that the structure of the skeleton of "Little Foot" suggested that they had apelike functions. The foot that Clarke examined at the Sterkfontein Cave had many characteristics that resembled those of an ape's foot, with only a slight resemblance to the modern human foot.[9]
See also
edit
- List of fossil sites (with link directory)
- List of hominina (hominid) fossils (with images)
References
edit- ^ Bower, Bruce (1998). "Ancient ancestor reveals skeletal stamina". Science News. 154 (25/26): 389. doi:10.2307/4010879. JSTOR 4010879.
- ^ Partridge, Timothy C.; Shaw, John; Heslop, David; Clarke, Ronald J. (1999). "The new hominid skeleton from Sterkfontein, South Africa: age and preliminary assessment". Journal of Quaternary Science. 14 (4): 293. Bibcode:1999JQS....14..293P. doi:10.1002/(SICI)1099-1417(199907)14:4<293::AID-JQS471>3.0.CO;2-X.
- ^ Johanson, Donald and Edgar, Blake (1996) From Lucy to Language, New York:Simon & Schuster. p. 184. ISBN 0684810239.
- ^ Blumenschine, R. J.; Peters, C. R.; Masao, F. T.; Clarke, R. J.; Deino, A. L.; Hay, R. L.; Swisher, C. C.; Stanistreet, I. G.; Ashley, G. M.; McHenry, L. J.; Sikes, N. E.; Van Der Merwe, N. J.; Tactikos, J. C.; Cushing, A. E.; Deocampo, D. M.; Njau, J. K.; Ebert, J. I. (2003). "Late Pliocene Homo and Hominid Land Use from Western Olduvai Gorge, Tanzania". Science. 299 (5610): 1217–21. Bibcode:2003Sci...299.1217B. doi:10.1126/science.1075374. PMID 12595689. S2CID 11390885.
- ^ "World-renowned Scientist sacked". geotoursafrica.com. 14 December 1998
- ^ Rak, Yoel; Clarke, Ronald J. (1979). "Aspects of the middle and external ear of early South African hominids". American Journal of Physical Anthropology. 51 (3): 471–473. doi:10.1002/ajpa.1330510320. ISSN 1096-8644. PMID 119440.
- ^ "The Sterkfontein Caves and Little Foot – IFAS-Research". Retrieved 22 May 2020.
- ^ Clarke, R. J. (1 October 1998). "First ever discovery of a well-preserved skull and associated skeleton of Australopithecus". South African Journal of Science. 94 (10): 460–463. ISSN 0038-2353.
- ^ Proctor, Daniel J. (2010). "Brief Communication: Shape analysis of the MT 1 proximal articular surface in fossil hominins and shod and unshod Homo". American Journal of Physical Anthropology (in French). 143 (4): 631–637. doi:10.1002/ajpa.21404. ISSN 1096-8644. PMID 20925078.