Erratum: A new hominid from the Upper Miocene of Chad, Central Africa

Brunet, Michel; Guy, Franck; Pilbeam, David; Mackaye, Hassane Taïsso; Likius, Andossa; Djimdoumalbaye, Ahounta; Beauvilain, Alain; Blondel, Cécile; Bocherens, Hervé; Boisserie, Jean‐Renaud; Bonis, Louis de; Coppens, Yves; Dejax, Jean; Denys, Christiane; Eisenmann, Véra; Fanone, Gongdibé; Fronty, Pierre; Geraads, Denis; Lehmann, Thomas; Lihoreau, Fabrice; Louchart, Antoine; Adoum, Mahamat; Garcia, Géraldine; Mouchelin, Guy; Otero, Olga; Campomanes, Pablo Peláez; León, Marcia Ponce de; Rage, Jean‐Claude; Sapanet, M.; Schuster, Mathieu; Sudre, Jean; Tassy, Pascal; Valentin, Xavier; Vignaud, Patrick; Viriot, Laurent; Zazzo, Antoine; Zollikofer, Christoph P.E.

doi:10.1038/nature01005

Cited by 15 publications

(4 citation statements)

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“…We still know very little about what the earliest hominids were doing. Bipedal locomotion of some kind has been claimed for both Sahelanthropus (Brunet et al 2002) and Orrorin , although doubts on that have been expressed, for example, by Harcourt- Smith and Aiello (2004), who considered that the earliest evidence for bipedalism is only arguably from Sahelanthropus, Orrorin, and the next taxon discussed here, Ardipithecus.…”

Section: Climate In Relation To Habitats and Adaptations Of Homininsmentioning

confidence: 91%

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Paleoenvironments and Hominin Evolution

Vrba

2013

Handbook of Paleoanthropology

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Environmental stimuli have influenced the evolution of hominins and other mammals at the levels of ontogeny, organismal adaptation, and speciation. The review refers to some agreement which has emerged -as well as to persistent debates -on the issue of environmental linkages to hominin adaptation. Current hypotheses which link physical change, adaptation, and speciation in general and in hominins in particular are discussed (including hypotheses on the role of ecological specialization and generalization, the coordinated stasis and variability selection hypotheses, habitat theory, and the turnover pulse hypothesis). Some persistent debates are revisited (such as on the current status of the savanna hypothesis and on whether or not there was mammalian species' turnover in the Turkana Basin during the Plio-Pleistocene). The relation of hominin evolution to the recent finding of several turnover pulses coincident with global cooling trends in the 10 Ma to recent record of all African larger mammals is considered. One example of hypotheses which address issues of environmental stimuli of ontogenetic evolution is the heterochrony pulse hypothesis: the generative properties shared among lineages can result not only in coherence of morphological changes but also in a strongly nonrandom timing of heterochrony events, as diverse lineages respond in parallel by similar kinds of heterochrony to the same environmental changes. The discussion includes cases in hominins and other mammals of evolutionary increase in body size by prolongation of growth and attendant "shuffling" of body proportions including relative increase in brain volume, namely, encephalization.

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Section: Climate In Relation To Habitats and Adaptations Of Homininsmentioning

confidence: 91%

“…The earliest known hominins (or presumed members of the hominin clade; not all agree) are Sahelanthropus tchadensis (Brunet et al 2002), ca. 7 Ma old, and Orrorin tugenensis (Senut et al 2001) from Lukeino, Kenya, ca.…”

Section: Climate In Relation To Habitats and Adaptations Of Homininsmentioning

confidence: 99%

Paleoenvironments and Hominin Evolution

Vrba

2013

Handbook of Paleoanthropology

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“…Whereas in the case of question-driven discoveries the area of ignorance and the line of enquiry in the field is well established and widely shared ("we know what we do not know"), discoveries driven by a research object are inverse question driven: The discovery precedes the formulation of the question ("we do not know what we do not know") (Meyers, 2011). For example, archaeologists might discover ancient hominid remains in an unexpected location, which then raises questions about the distribution and social relation of hominids (Brunet, Guy, et al, 2002). The discovery of ancient remains thus drives the formulation of a question that was not asked before.…”

Section: From Discovery Types To Discovery Dimensionsmentioning

confidence: 99%

A typology of scientific breakthroughs

Wuestman

Hoekman

Frenken

2020

Quantitative Science Studies

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Scientific breakthroughs are commonly understood as discoveries that transform the knowledge frontier, and have a major impact on science, technology and society. Prior literature studying breakthroughs generally treat them as a homogenous group in attempts to identify supportive conditions for their occurrence. In this paper, we argue that there are different types of scientific breakthroughs which differ in their disciplinary occurrence and are associated with different considerations of use and citation impact patterns. We develop a typology of scientific breakthroughs based on three binary dimensions of scientific discoveries and use this typology to, qualitatively, analyse the content of 335 scientific articles that report on breakthroughs. For each dimension, we test associations with scientific disciplines, reported use considerations and scientific impact. We find that most scientific breakthroughs are driven by a question and in line with literature and that paradigm shifting discoveries are rare. Regarding the scientific impact of breakthrough as measured by citations, we find that an article that answers an unanswered question receives more citations, compared to articles that were not motivated by an unanswered question. We conclude that earlier research in which breakthroughs were operationalized as highly cited scientific articles, may thus be biased against the latter.

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“…The Late Miocene sites at Toros Menalla, Northern Chad (Central Africa) have delivered rich fossil vertebrate assemblages, including one of the oldest Hominidae sahelanthropus tchadensis Brunet et al 2002(see also Brunet et al, 2004. Besides large mammals, some small mammals have also been recovered by screen-sieving and visual inspection.…”

Section: Introductionmentioning

confidence: 99%

A New Lagomorph From the Late Miocene of Chad (Central Africa)

López-Martı́nez

Likius

Mackaye

et al. 2021

Spanish J. Palaeontol.

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A new species of the genus serengetilagus Dietricht 94, here named s. tchadensis n. sp., is described from Toros Menalla deposits, Late Miocene of Djurab Erg (North Chad, central Africa). It shows primitive features, such as a simple archaeolagine-type p3, with only two main external folds, and upper cheek teeth strongly widened with wear. Its size and skeletal features resemble s. praecapensis Dietricht 94 from the Middle Pliocene of Laetoli (Tanzania). They differ in several cranial and dental features (choanae width, zygoma, orbits, basicranial-basifacial angle, lack of hypoflexus in P2, short and asymmetric hypoflexus in P3-M2, lack of lingual folds in p3, etc). Individual variations in s. tchadensis n. sp. approach s. praecapensis, such as an incipient anteroflexid and a forward-curved hypoflexid in some p3. The genus serengetilagus is here assigned to the subfamily Archaeolaginae Dice 929 and related to Hypolagus Dice 97, namely to H. gromovi Gureev 964 from the Late Miocene of Southern Russia. Other related species are serengetilagus orientieuropaeus Topachevsky 987 and primitive species of the genus trischizolagus Radulesco & Samson 967, such as t. maritsae De Bruijn, Dawson & Mein 970 and t. crusafonti (Janvier & Montenat 97). Pliocene leporids from Spain, Ukraine, Russia, Afghanistan and Mongolia have been questionably attributed to serengetilagus or trischizolagus, which seem synonymous for some authors. Several features are here proposed to distinguish both genera: rounded versus rhombic-shaped p3, weak versus strong lingual anteroconid-anteroflexid, and forward versus backward hypoflexid bend. serengetilagus could have a mixed fossorial-cursorial mode of life, as can be inferred by its ecomorphological traits (combining features of hare and rabbit) and taphonomical indications. This new African archaeolagine is contemporaneous of the widespread palaeolagine alilepus Dice 93, recorded in the Late Miocene of Kenya. The independence of these two lineages is favoured after revision of previous hypotheses on the phylogeny of the highly diverse Mio-Pliocene peri-Tethysian leporid species.

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Erratum: A new hominid from the Upper Miocene of Chad, Central Africa

Abstract: Owing to an editorial oversight, the sentence in the second column of page 150 that reads 'Lower c and the lower and upper premolars each have three pulp canals and two roots' is in error. Instead, it should read 'Lower and upper premolars each have three pulp canals and two roots'.

Cited by 15 publications

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Paleoenvironments and Hominin Evolution

Paleoenvironments and Hominin Evolution

A typology of scientific breakthroughs

A New Lagomorph From the Late Miocene of Chad (Central Africa)

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