Florisbad Skull

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Florisbad Skull
Florisbad-Helmei-Homo heidelbergensis.jpg
Common nameFlorisbad Skull
Species Homo sapiens
or Homo helmei
or Homo heidelbergensis
Age259±35 ka
Place discovered Florisbad archaeological and paleontological site, South Africa
Date discovered1932
Discovered byThomas F. Dreyer, G. Venter [1]

The Florisbad Skull is an important human fossil of the early Middle Stone Age, representing either late Homo heidelbergensis or early Homo sapiens . It was discovered in 1932 by T. F. Dreyer at the Florisbad site, Free State Province, South Africa.

Contents

Classification

The Florisbad Skull was classified as Homo (Africanthropus) helmei by Dreyer (1935), after the sponsor of Dreyer's expedition, R. E. Helme. The Africanthropus generic name proposed by Dreyer was taken up by Weinert (1938) to refer to early African human fossils. In a note to Dreyer's 1935 publication, C. U. Ariëns Kappers mentioned the close resemblance of the fossil to Homo sapiens fossilis (Cro-Magnon Man). M. R. Drennan (1935, 1937) emphasized resemblance to Homo neanderthalensis , proposing his classification as Homo florisbadensis (helmei). A. Galloway (1937) proposed classification as Homo sapiens, specifically noting a resemblance to modern Australoids. Commentators of the 1950s to 1970s have drawn attention to archaic African human fossils such as Saldanha and Kabwe crania (now assigned to H. heidelbergensis ). Clarke (1985) compared it to Laetoli Hominid 18 and Omo 2, which are now considered early anatomically modern human (H. sapiens) fossils.

The difficulty of placing the fossil in either H. heidelbergensis or H. sapiens prompted McBrearty and Brooks (2000) to revive the designation H. helmei. [1] In 2016 Chris Stringer argued that the Florisbad Skull, along with the Jebel Irhoud and Eliye Springs specimens, belong to an archaic or "early" form of Homo sapiens. [2] The Florisbad Skull was also classified as Homo sapiens by Hublin et al. (in 2017), in part on the basis of the similar Jebel Irhoud finds from Morocco. [3] [4] Scerri et al. (2018) adduce the fossil as evidence for "African multiregionalism", the view of a complex speciation of H. sapiens widely dispersed across Africa, with substantial hybridization between H. sapiens and more divergent hominins in different regions. [5] Lahr and Mounier (2019) also classify the Florisbad Skull as an example of early H. sapiens, which they suggest arose between 350,000 and 260,000 years ago from the merging of populations in East and South Africa. [6] [7]

Description

The Florisbad Skull belonged to a specimen within the size range of modern humans, with a brain volume larger than modern averages, at 1,400 cm3. The skull was also found with Middle Stone Age tools. [8]

The fossil skull is a fragment; preserved are the right side of the face, most of the frontal bone, and some of the maxilla, along with portions of the roof and sidewalls. A single, upper right, third molar was also found with the adult skull.

The skull also showed extensive porotic hyperostosis as well as a large number of healed lesions, including pathological drainage or vascular tracts. There are also a couple of large puncture marks and scratch-like marks which may reflect hyena chewing. [9]

Based on enamel samples from the tooth found with the skull, the fossil has been directly dated by electron spin resonance dating to around between 259±35 ka (between 294,000 and 224,000 years old). [9]

Context

The partial cranium is part of an assemblage of mostly carnivore prey remains, caught in vertical spring vents. It shows damage by hyena chewing. The spring vents were later sealed by deposits. "Peat II" is a deposit of dark organic clay representing a Middle Stone Age land surface, showing a human occupation horizon dated 121±6 ka. [9]

The wider Florisbad site has also produced a large and diverse fauna. The assemblage including micro-vertebrates from springhares, rabbits, rodents and reptiles has informed researchers on the paleoenvironment of the interior of South Africa in the Middle Pleistocene. The large mammal component of the site suggests an open grassland with a body of water in the immediate vicinity. [10] Although many specimens are dated by comparisons of faunal assemblages, this method does not prove to have accurate chronological resolution for much of the last million years. [11]

See also

Related Research Articles

<span class="mw-page-title-main">Early modern human</span> Old Stone Age Homo sapiens

Early modern human (EMH), or anatomically modern human (AMH), are terms used to distinguish Homo sapiens that are anatomically consistent with the range of phenotypes seen in contemporary humans, from extinct archaic human species. This distinction is useful especially for times and regions where anatomically modern and archaic humans co-existed, for example, in Paleolithic Europe. Among the oldest known remains of Homo sapiens are those found at the Omo-Kibish I archaeological site in south-western Ethiopia, dating to about 233,000 to 196,000 years ago, the Florisbad site in South Africa, dating to about 259,000 years ago, and the Jebel Irhoud site in Morocco, dated about 315,000 years ago.

<i>Homo heidelbergensis</i> Extinct species of archaic human

Homo heidelbergensis is an extinct species or subspecies of archaic human which existed during the Middle Pleistocene. It was subsumed as a subspecies of H. erectus in 1950 as H. e. heidelbergensis, but towards the end of the century, it was more widely classified as its own species. It is debated whether or not to constrain H. heidelbergensis to only Europe or to also include African and Asian specimens, and this is further confounded by the type specimen being a jawbone, because jawbones feature few diagnostic traits and are generally missing among Middle Pleistocene specimens. Thus, it is debated if some of these specimens could be split off into their own species or a subspecies of H. erectus. Because the classification is so disputed, the Middle Pleistocene is often called the "muddle in the middle".

<span class="mw-page-title-main">Herto Man</span> Number of early modern human fossils found in Herto Bouri, Ethiopia

Herto Man refers to human remains discovered in 1997 from the Upper Herto member of the Bouri Formation in the Afar Triangle, Ethiopia. The remains have been dated as between 154,000 and 160,000 years old. The discovery of Herto Man was especially significant at the time, falling within a long gap in the fossil record between 300 and 100 thousand years ago and representing the oldest dated H. sapiens remains then described.

<i>Homo</i> Genus of hominins that includes humans and their closest extinct relatives

Homo is a monotypic genus that emerged from the genus Australopithecus and encompasses the extant species Homo sapiens and several extinct species classified as either ancestral to or closely related to modern humans, including Homo erectus and Homo neanderthalensis. The oldest member of the genus is Homo habilis, with records of just over 2 million years ago. Homo, together with the genus Paranthropus, is probably sister to Australopithecus africanus, which itself had split from the lineage of Pan, the chimpanzees.

<span class="mw-page-title-main">Max Planck Institute for Evolutionary Anthropology</span> Research institute based in Leipzig, Germany

The Max Planck Institute for Evolutionary Anthropology is a research institute based in Leipzig, Germany, that was founded in 1997. It is part of the Max Planck Society network.

<i>Homo rhodesiensis</i> Species of primate (fossil)

Homo rhodesiensis is the species name proposed by Arthur Smith Woodward (1921) to classify Kabwe 1, a Middle Stone Age fossil recovered from Broken Hill mine in Kabwe, Northern Rhodesia. In 2020, the skull was dated to 324,000 to 274,000 years ago. Other similar older specimens also exist.

<span class="mw-page-title-main">Ceprano Man</span> Prehistoric human skull cap from Italy

Ceprano Man, Argil, and Ceprano Calvarium, is a Middle Pleistocene archaic human fossil, a single skull cap (calvarium), accidentally unearthed in a highway construction project in 1994 near Ceprano in the Province of Frosinone, Italy. It was initially considered Homo cepranensis, Homo erectus, or possibly Homo antecessor; but in recent studies, most regard it either as a form of Homo heidelbergensis sharing affinities with African forms, or an early morph of Neanderthal.

<span class="mw-page-title-main">Steinheim skull</span> Hominin fossil

The Steinheim skull is a fossilized skull of a Homo neanderthalensis or Homo heidelbergensis found on 24 July 1933 near Steinheim an der Murr, Germany.

The Omo remains are a collection of hominin bones discovered between 1967 and 1974 at the Omo Kibish sites near the Omo River, in Omo National Park in south-western Ethiopia. The bones were recovered by a scientific team from the Kenya National Museums directed by Richard Leakey and others. The remains from Kamoya's Hominid Site (KHS) were called Omo I and those from Paul I. Abell's Hominid Site (PHS) were called Omo II.

Human taxonomy is the classification of the human species within zoological taxonomy. The systematic genus, Homo, is designed to include both anatomically modern humans and extinct varieties of archaic humans. Current humans have been designated as subspecies Homo sapiens sapiens, differentiated, according to some, from the direct ancestor, Homo sapiens idaltu.

<span class="mw-page-title-main">Archaic humans</span> Extinct relatives of modern humans

Archaic humans is a broad category denoting all species of the genus Homo that are not Homo sapiens. Among the earliest related remains are those from Jebel Irhoud in Morocco, Florisbad in South Africa (259 ka), and Omo-Kibish I in southern Ethiopia. The term typically includes H. antecessor (1200–770 ka), H. bodoensis (1200–300 ka), H. heidelbergensis (600–200 ka), Neanderthals, H. rhodesiensis (300–125 ka) and Denisovans,

<span class="mw-page-title-main">Dali Man</span> Hominin fossil

Dali man is the remains of a late Homo erectus or archaic Homo sapiens who lived in the late-mid Pleistocene epoch. The remains comprise a complete fossilized skull, which was discovered by Liu Shuntang in 1978 in Dali County, Shaanxi Province, China.

<span class="mw-page-title-main">Jebel Irhoud</span> Archaeological site in Morocco

Jebel Irhoud or Adrar n Ighoud, is an archaeological site located just north of the locality known as Tlet Ighoud, approximately 50 km (30 mi) south-east of the city of Safi in Morocco. It is noted for the hominin fossils that have been found there since the discovery of the site in 1960. Originally thought to be Neanderthals, the specimens have since been assigned to Homo sapiens and, as reported in 2017, have been dated to roughly 300,000 years ago.

<span class="mw-page-title-main">Jean-Jacques Hublin</span> French paleoanthropologist

Jean-Jacques Hublin is a French paleoanthropologist. He is a professor at the Max Planck Society, Leiden University and the University of Leipzig and the founder and director of the Department of Human Evolution at the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany. He is best known for his work on the Pleistocene hominins, and on the Neandertals and early Homo sapiens, in particular.

<span class="mw-page-title-main">Skhul and Qafzeh hominins</span> Hominin fossils

The Skhul and Qafzeh hominins or Qafzeh–Skhul early modern humans are hominin fossils discovered in Es-Skhul and Qafzeh caves in Israel. They are today classified as Homo sapiens, among the earliest of their species in Eurasia. Skhul Cave is on the slopes of Mount Carmel; Qafzeh Cave is a rockshelter near Nazareth in Lower Galilee.

The term archaic Homo sapiens has different meanings depending on the preferred system of taxonomy. See Human taxonomy for the question of taxonomic classification of early human varieties.

<span class="mw-page-title-main">Early expansions of hominins out of Africa</span> First hominin expansion into Eurasia (2.1–0.1 Ma)

Several expansions of populations of archaic humans out of Africa and throughout Eurasia took place in the course of the Lower Paleolithic, and into the beginning Middle Paleolithic, between about 2.1 million and 0.2 million years ago (Ma). These expansions are collectively known as Out of Africa I, in contrast to the expansion of Homo sapiens (anatomically modern humans) into Eurasia, which may have begun shortly after 0.2 million years ago.

<span class="mw-page-title-main">Ndutu cranium</span> Hominin fossil

The Ndutu skull is the partial cranium of a hominin that has been assigned variously to late Homo erectus, Homo rhodesiensis, and early Homo sapiens, from the Middle Pleistocene, found at Lake Ndutu in northern Tanzania.

<span class="mw-page-title-main">Salé cranium</span> Enigmatic Middle Pleistocene hominin specimen

The Salé cranium is a pathological specimen of enigmatic Middle Pleistocene hominin discovered from Salé, Morocco by quarrymen in 1971. Since its discovery, the specimen has variously been classified as Homo sapiens, Homo erectus, Homo rhodesiensis/bodoensis, or Homo heidelbergensis. Its pathological condition and mosaic anatomy has proved difficult to classify. It was discovered with few faunal fossils and no lithics, tentatively dated to 400 ka by some sources.

References

  1. 1 2 Schwartz, Jeffrey H.; Tattersall, Ian (2005-03-11). The Human Fossil Record, Craniodental Morphology of Genus Homo (Africa and Asia). John Wiley & Sons. p. 7981. ISBN   9780471326441..
  2. Stringer, C. (2016). "The origin and evolution of Homo sapiens". Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences. 371 (1698): 20150237. doi:10.1098/rstb.2015.0237. PMC   4920294 . PMID   27298468.
  3. Sample, Ian (7 June 2017). "Oldest Homo sapiens bones ever found shake foundations of the human story". The Guardian. Retrieved 7 June 2017.
  4. Hublin, Jean-Jacques; Ben-Ncer, Abdelouahed; Bailey, Shara E.; Freidline, Sarah E.; Neubauer, Simon; Skinner, Matthew M.; Bergmann, Inga; Le Cabec, Adeline; Benazzi, Stefano; Harvati, Katerina; Gunz, Philipp (2017). "New fossils from Jebel Irhoud, Morocco and the pan-African origin of Homo sapiens" (PDF). Nature. 546 (7657): 289–292. Bibcode:2017Natur.546..289H. doi:10.1038/nature22336. PMID   28593953. S2CID   205255859.
  5. "Other early H. sapiens fossils from Florisbad in South Africa (~260 ka), Omo Kibish (~195 ka) and Herto (~160 ka), both in Ethiopia, are morphologically diverse. This diversity has led some researchers to propose that fossils such as Jebel Irhoud and Florisbad actually represent a more primitive species called 'H. helmei', using the binomen given to the Florisbad partial cranium in 1935. ...However, we view H. sapiens as an evolving lineage with deep African roots, and therefore prefer to recognize such fossils as part of the diversity shown by early members of the H. sapiens clade." Scerri, EML; Thomas, MG; Manica, A; Gunz, P; Stock, JT; Stringer, C; Grove, M; Groucutt, HS; Timmermann, A; Rightmire, GP; d'Errico, F; Tryon, CA; Drake, NA; Brooks, AS; Dennell, RW; Durbin, R; Henn, BM; Lee-Thorp, J; Petraglia, MD; Thompson, JC; Scally, A; Chikhi, L (2018). "Did Our Species Evolve in Subdivided Populations across Africa, and Why Does It Matter?". Trends Ecol Evol. 33 (8): 582–594. doi:10.1016/j.tree.2018.05.005. PMC   6092560 . PMID   30007846.
  6. Mounier, Aurélien; Lahr, Marta (2019). "Deciphering African late middle Pleistocene hominin diversity and the origin of our species". Nature Communications . 10 (1): 3406. Bibcode:2019NatCo..10.3406M. doi:10.1038/s41467-019-11213-w. PMC   6736881 . PMID   31506422.
  7. Zimmer, Carl (10 September 2019). "Scientists Find the Skull of Humanity's Ancestor — on a Computer - By comparing fossils and CT scans, researchers say they have reconstructed the skull of the last common forebear of modern humans". The New York Times . Retrieved 10 September 2019.
  8. Rightmire, G. Philip (2009-09-22). "Middle and later Pleistocene hominins in Africa and Southwest Asia". Proceedings of the National Academy of Sciences. 106 (38): 16046–16050. Bibcode:2009PNAS..10616046R. doi: 10.1073/pnas.0903930106 . ISSN   0027-8424. PMC   2752549 . PMID   19581595. "Homo helmei". Bradshaw Foundation. Retrieved 2015-11-18.
  9. 1 2 3 Grün, Rainer; Brink, James S.; Spooner, Nigel A.; Taylor, Lois; Stringer, Chris B.; Franciscus, Robert G.; Murray, Andrew S. (1996-08-08). "Direct dating of Florisbad hominid". Nature. 382 (6591): 500–501. Bibcode:1996Natur.382..500G. doi:10.1038/382500a0. PMID   8700221. S2CID   4435718..
  10. Lewis, Patrick J.; Brink, James S.; Kennedy, Alicia M.; Campbell, Timothy L. (2011). "Examination of the Florisbad microvertebrates". South African Journal of Science. 107 (7/8). doi: 10.4102/sajs.v107i7/8.613 .
  11. Millard, A.R. (2008). "A critique of the chronometric evidence for hominid fossils: I. Africa and the Near East 500-50 ka" (PDF). J Hum Evol. 54 (6): 848–874. doi:10.1016/j.jhevol.2007.11.002. PMID   18201747.

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