Aroeira 3

Last updated
Aroeira 3
Aroeira3.jpg
Common nameAroeira 3
Species Homo heidelbergensis
Age400,000 years
Place discovered Aroeira cave, Almonda, Torres Novas, Portugal
Date discovered2014

Aroeira 3 is a 400,000 year old Homo heidelbergensis hominid skull which was discovered in the Aroeira cave, Portugal. It is the earliest human trace in Portugal. H. heidelbergensis existed at the transition between Homo erectus and early Neanderthals and used both stone tools and fire. The skull was damaged during the 2014 excavation but was restored in the following two years. In 2017 the description of the skull was published in PNAS . It is on display in the National Archaeology Museum (Lisbon).

Contents

Description

Aroeira 3 is a 400,000 year old Homo heidelbergensis hominid skull from the Middle Pleistocene which was discovered in the Aroeira cave, Portugal, and announced in spring 2017. It is the earliest human trace in Portugal.

Hominin fossils from this era are commonly classified as H. heidelbergensis, a chronospecies that stands at the transition between Homo erectus and early Neanderthals. The Palaeolithic Acheulean culture, attributed to this and other finds in the Cave of Aroeira, is characterised by the production of Stone tools, notably the hand axe and the use of fire. The skull was damaged during the 2014 excavation from the hard conglomerate rock, but was restored in the following two years. It was only in 2017 that the description of the skull was published in the Proceedings of the National Academy of Sciences of the United States of America (PNAS). [1] [2] [3] [4]

Features

Aroeira 3 shows some of the features from similar skulls found in Europe, but their combination is unique. The over-eyelashes are continuous, as in the Bilzingsleben skull fragments of Homo erectus bilzingslebensis. The mastoid of the temporal bone is short as in Homo steinheimensis from the gravel pit at Steinheim an der Murr. The large, triangular bony tap on the temporal bone near the auditory canal is also present in skull no. 5 from the site Sima de los Huesos in Spain, the best preserved Homo heidelbergensis skull in the world. The Aroeira 3 skull, however, differs from this and the Homo steinheimensis by the absence of essential features that also occur in the early Neanderthals. [5]

Location

The skull was found in a cave above the source of the Rio Almonda, a tributary of the Tagus, which lies in the karst landscape of the Portuguese Estremadura Limestone Massif. The river forms an approximately 40-kilometer-long cut in the limestone massif with steep banks up to 70 meters in height. On these steep banks, there are various entrances to caves and cave systems that are partially collapsed or filled. Some caves have been excavated and explored. They are associated with human evolution during the Pleistocene and the cultural history during the Paleolithic. There are some cave systems used in the Upper Palaeolithic such as Entrada Superior, Entrada do Vale da Serra and Gruta da Aroeira. The Middle Palaeolithic is represented in the Gruta da Oliveira. Late Palaeolithic developments of the Solutrean and Magdalenian cultures can be found in the Galeria da Cisterna and the Lapa dos Coelhos. [6]

Since 1978, the caves have been systematically explored, the first phase of the excavation work in the Cave of Aroeira lasted from 1998 until 2002. In addition to two early human teeth from the Acheulian industry (a canine and a molar, known as Aroeira 1 and Aroeira 2) were also found. The second phase of excavation, from 2013 to 2015, included the well-preserved skull Aroeira 3, but the hardness of the sediment in which it was embedded lead to damage during recovery and had it to be partially reconstructed. [2]

Age

The age was assessed by uranium–thorium dating, whereby the age of the outer layer of the adjacent stalagmite was found to be 406,000 years within a range of 30,000 years. This is the upper limit because the stalagmite was later buried by boulders and mud masses and stopped growing. Calcite crusts on the skull itself were dated to 390,000 years (± 14,000 years). [2]

See also

Related Research Articles

<i>Homo heidelbergensis</i> Extinct species of the genus Homo

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."

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

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

Santarém District District of Portugal

The District of Santarém is a district of Portugal, located in Portugal's Centro Region. The district capital is the city of Santarém.

<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 a cave at Broken Hill, or Kabwe, Northern Rhodesia .. In 2020, the skull was dated to 324,000 to 274,000 years ago. Other similar older specimens also exist.

Atapuerca Mountains Mountain range in northern Spain

The Atapuerca Mountains is a karstic hill formation near the village of Atapuerca in the province of Burgos, northern Spain.

Aris Poulianos Greek anthropologist and archaeologist

Aris Poulianos is a Greek anthropologist and archaeologist.

Steinheim skull 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. It is estimated to be between 250,000 and 350,000 years old. The skull is slightly flattened and has a cranial capacity between 950 and 1280 cc. Sometimes referred to as Homo steinheimensis in older literature, the original fossil is housed in the State Museum of Natural History in Stuttgart, Germany. Some believe that the Steinheim skull may have belonged to an adult female due to its gracile nature.

Archaic humans Extinct relatives of modern humans

A number of varieties of Homo are grouped into the broad category of archaic humans in the period that precedes and is contemporary to the emergence of the earliest early modern humans around 300 ka. Omo-Kibish I from southern Ethiopia and the remains from Jebel Irhoud in Morocco and Florisbad in South Africa are among the earliest remains of Homo sapiens. The term typically includes Homo neanderthalensis, Denisovans, Homo rhodesiensis (300–125 ka), Homo heidelbergensis (600–200 ka), Homo naledi, Homo ergaster, and Homo antecessor.

Dali Man 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.

Paleolithic Europe

Paleolithic Europe, the Lower or Old Stone Age in Europe, encompasses the era from the arrival of the first archaic humans, about 1.4 million years ago until the beginning of the Mesolithic around 10,000 years ago. This period thus covers over 99% of the total human presence on the European continent. The early arrival and disappearance of Homo erectus and Homo heidelbergensis, the appearance, complete evolution and eventual demise of Homo neanderthalensis and the immigration and successful settlement of Homo sapiens all have taken place during the European Paleolithic.

Nanjing Man subspecies of homo erectus

Nanjing Man is a subspecies of Homo erectus found in China. Large fragments of one male and one female skull and a molar tooth of H. e. nankinensis were discovered in 1993 in the Hulu cave on the Tangshan (汤山) hills near Nanjing. The term Nanjing man is used to describe the subspecies of Homo erectus but is also used when referring to the three fossils. The specimens were found in the Hulu limestone cave at a depth of 60–97 cm by Liu Luhong, a local worker. Dating the fossils yielded an estimated age of 580,000 to 620,000 years old.

Tautavel Man Homo erectus fossil

Tautavel Man refers to the archaic humans which—from approximately 550,000 to 400,000 years ago—inhabited the Caune de l’Arago, a limestone cave in Tautavel, France. They are generally grouped as part of a long and highly variable lineage of transitional morphs which inhabited the Middle Pleistocene of Europe, and would eventually evolve into the Neanderthals. They have been variably assigned to either H. (s.?) heidelbergensis, or as a European subspecies of H. erectus as H. e. tautavelensis. The skull is reconstructed based on the specimens Arago 21 and 47, and it is, to a degree, more characteristic of what might be considered a typical H. erectus morphology than a typical H. heidelbergensis morphology. The brain capacity is 1,166 cc. They seem to have had an overall robust skeleton. Average height may have been 166 cm.

Petralona cave Cave and archeological site in Petralona, Chalkidiki, Greece

The Petralona cave also Cave of the Red Stones, a karst formation, is located at 300 m (984 ft) above sea-level on the western foot of Mount Katsika, about 1 km (0.62 mi) east of the village of Petralona, about 35 km (22 mi) south-east of Thessaloniki city on the Chalkidiki peninsula, Greece. The site came to public attention when in 1960 a fossilized archaic human skull was found. The cave had been discovered accidentally only a year earlier (1959) after erosion had left clefts in the rock. "Bejeweled" with impressive stalactite and stalagmite formations and holding an abundance of fossils, the cave soon attracted geologists and paleontologists. After decades of excavations the cave is open to the public and scientific work is documented and presented in an adjacent archaeological museum.

Ndutu cranium Hominin fossil

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

Cave of Aroeira Cave and archaeological site in Portugal

The Cave of Aroeira is an archaeological and paleoanthropological site in the Portuguese Estremadura Limestone Massif. The cave is located in the village of Almonda, in the civil parish of Zibreira, in the municipality of Torres Novas in the district of Santarém. The cave contained stones from the Paleolithic Acheulean culture, and the skull of Homo heidelbergensis, circa 400,000 years old. The discovery of Aroeira 3 was announced in spring 2017 - the earliest human trace in Portugal.

Almonda

Almonda is a Portuguese village of around 300 inhabitants in the civil parish of Zibreira, within the municipality of Torres Novas and the Santarém District.

Zibreira is a civil parish in Portugal, located within the municipality of Torres Novas, in the Santarém District. It is noted for the Aroeria cave, where the Aroeira 3 skull of a 400,000 year old Homo Heidelbergensis was found, being the oldest trace of human history in Portugal.

Kabwe 1 Hominin fossil

Kabwe 1 is a Middle Paleolithic fossil assigned by Arthur Smith Woodward in 1921 as the type specimen for Homo rhodesiensis, now mostly considered a synonym of Homo heidelbergensis.

Archaeological site of Atapuerca Archaeological site in northern Spain, rich in human fossils

The archaeological site of Atapuerca is located in the province of Burgos in the north of Spain and is notable for its evidence of early human occupation. It was designated a World Heritage Site in 2000.

<i>Homo bodoensis</i> Extinct species of the genus Homo

Homo bodoensis is the species name for extinct archaic humans that lived during the Chibanian in Africa. It relies on the fossil specimen known as Bodo cranium, which was discovered in 1976 from the Awash River in Ethiopia and is estimated to have lived around 500,000 years ago. Following the comparative analysis of the fossil with those of other Homo falling on the same geological age, the name was formally introduced in 2021.

References

  1. Phys Org, March 13, 2017, 400,000-year-old fossil human cranium is oldest ever found in Portugal
  2. 1 2 3 Joan Daura et al.: New Middle Pleistocene hominin cranium from Gruta da Aroeira (Portugal). In: Proceedings of the National Academy of Sciences (PNAS) Online pre-release of 13 March 2017.
  3. The primitive man from Portugal, Article from 16 March 2017 des Hamburger Abendblatt, accessed on March 22, 2017
  4. Crânio de 400 mil anos é o fóssil humano mais antigo descoberto em Portugal 400,000 year old skull found the oldest human fossil in Portugal, Article from 13. March 2017 he Portuguese newspaper Público, accessed on March 22, 2017
  5. Roberto Sáez: Aroeira 3: The westernmost Middle Pleistocene cranium of Europe. Nutcracker Man, outreaching the human evolution research, 13. March 2017, retrieved on March 15, 2017 (English)
  6. João Zilhão, Diego E. Angelucci, Joan Daura, Marianne Deschamps, Dirk L. Hoffmann, Henrique Matias, Mariana Nabais, Montserrat Sanz: The Almonda karst system (Torres Novas, Portugal): a window into half a million years of long-term change in climate, settlement, subsistence, technology and cult. Proceedings of the European Society for the study of Human Evolution, 5, 2016, S. 253,

Coordinates: 39°30′21″N8°36′57″W / 39.5057°N 8.6157°W / 39.5057; -8.6157