Many ideas have been proposed to explain the origin of bipedalism in hominins and suspension in great apes (hominids); however, fossil evidence has been lacking. It has been suggested that bipedalism in hominins evolved from an ancestor that was a palmigrade quadruped (which would have moved similarly to living monkeys), or from a more suspensory quadruped (most similar to extant chimpanzees)1. Here we describe the fossil ape Danuvius guggenmosi (from the Allgäu region of Bavaria) for which complete limb bones are preserved, which provides evidence of a newly identified form of positional behaviour—extended limb clambering. The 11.62-million-year-old Danuvius is a great ape that is dentally most similar to Dryopithecus and other European late Miocene apes. With a broad thorax, long lumbar spine and extended hips and knees, as in bipeds, and elongated and fully extended forelimbs, as in all apes (hominoids), Danuvius combines the adaptations of bipeds and suspensory apes, and provides a model for the common ancestor of great apes and humans.
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All data generated or analysed during this study are included in this published Article (and its Supplementary Information). The computed tomography scans are available from the corresponding author on reasonable request. The new taxon has the following Life Science Identifier: http://zoobank.org/References/E1573024-9543-4B1E-A79B-6E40896A4617.
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We are indebted to the following researchers and curators for granting access to collections under their care: S. Moyà-Solà and D. Alba, E. Gilissen, L. Costeur, A. van Heteren, S. Merker, E. Weber. We thank C. Schulbert and J.-F. Metayer for computed tomography scanning, and A. Fatz, H. Stöhr and W. Gerber for technical support.
The authors declare no competing interests.
Publisher’s note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Peer review information Nature thanks Jeremy M. DeSilva, Tracy Kivell and Salvador Moyà-Solà for their contribution to the peer review of this work.
Extended data figures and tables
Extended Data Fig. 1 Localization of Hammerschmiede locality and excavation plan with localized D. guggenmosi specimens.
a, Topographical map of Europe. b, Magnification of the western part of the south German Molasse Basin (North Alpine Foreland Basin). The Hammerschmiede locality (47° 55′ 37″ N, 10° 35.5′ E) is highlighted with a black star. Both maps were created using Generic Mapping Tools47 and topographic datasets ETOPO148 and SRTM349. c, Excavation plan of the HAM 5 layer (the section has previously been published15) with excavated areas coloured in grey. Intermediate regions represent material lost due to clay mining. Dashed lines indicate the reconstructed thalweg course of the palaeochannel. Different colours and symbols indicate the individual context: holotype (GPIT/MA/10000) adult male marked in red (stars), paratype (GPIT/MA/10001) female 1 in blue (diamonds), paratype (GPIT/MA/10002) juvenile individual in yellow (circles) and paratype (GPIT/MA/10003) female 2 in green (triangles). The red encircled sector indicates removed and stored sediments that were screen washed separately. This area was under threat of destruction from quarry activity. To avoid the complete loss of this sediment, approximately 25 tonnes were removed for remote processing. Two specimens were recovered in situ in this area. Five other specimens from this area were recovered during subsequent screen washing and cannot be more precisely localized. Coordinates correspond to Gauss-Krüger Zone 4 grid with easting (R) and northing (H) in metres.
a, Left maxilla with P3–M2 (GPIT MA/10000-01) in lateral, anterior, medial (top), palatal, posterior, superior (bottom) views. b, Left mandible (GPIT MA/10000-02) in lateral, anterior, medial and occlusal views. c, Left upper central incisor (GPIT MA/10002-01) in labial, lingual and occlusal views. d, Right upper P3 fragment (GPIT MA/10000-05) in buccal, occlusal and mesial views. e, Left P3 (GPIT MA/10001-03) in buccal, occlusal and mesial views. f, Right upper M1 (GPIT MA/10001-01) in occlusal, medial, distal and buccal views. g, Left lower P3 (GPIT MA/10000-07) in medial, buccal, lingual and occlusal views. h, Left lower lateral incisor (GPIT MA/10003-5) in distal, mesial, lingual and labial views. i, Left lower central incisor (GPIT MA/10000-08) in distal, mesial and lingual views. j, Right lower P3 (GPIT MA/10000-06) in mesial, distal, buccal and occlusal views. k, Right lower M2 (GPIT MA/10000-03) in lingual, buccal (top), mesial, distal (bottom) and occlusal views. l, Right lower M3 (GIPT MA/10000-04) in lingual, mesial (top), buccal, distal (bottom) and occlusal views. Scale bar, 10 mm.
a, Relationships of physiologic lengths of tibia and ulna among extant and fossil catarrhines. b, Relationships of tibial plateau surface area (TPSA sensu39, natural logarithm of square root) and tibial total length (natural logarithm) among extant hominids, hylobatids and cercopithecids (comparative data from a previous study39). The tibial plateau surface area of GPIT MA/10000-10 is 1,457 mm2.
Extended Data Fig. 4 D. guggenmosi, additional views of right ulna (GPIT MA/10000-10) and left tibia (GPIT MA/10000-15).
a–d, Lateral (a), anteromedial (b) and posterior (c) views of the ulna and the reconstructed olecranon in anterior view (d). e, f, Medial (e) and lateral (f) views of the tibia. Scale bar, 20 mm.
a, Ulnar trochlear notch angle (for raw data, see Supplementary Table 9). b, Hallucal proximal phalanx (PP1) torsion (for measurement, see Methods; for raw data, see Supplementary Table 23). c, Size-adjusted hallucal proximal phalanx (PP1) midshaft robusticity (MLms × DPms/GM in which MLms is the mediolateral width at midshaft, DPms is the dorsopalmar height at midshaft and GM is the geometric mean of the seven measurements: ML and DP at proximal, distal and midshaft, and total length; for raw data, see Supplementary Table 22). d, Size-adjusted second manual proximal phalanx (PP2) gracility (TL/GM in which TL is the total length and GM is the geometric mean of five measurements: ML and DP at distal and midshaft, and TL; five measurements are used to include Pierolapithecus catalaunicus, in which the proximal articulation is damaged50; for raw data, see Supplementary Table 11). e, Manual phalangeal base, ratio of mediolateral (ML) to dorsopalmar (DP) length (for raw data, see Supplementary Tables 11, 12). f, Manual metacarpal 1 base, ratio of dorsopalmar to radioulnar (RU) length (for raw data, see Supplementary Table 10). g, Relative size of manual metacarpal 1 base (geometric mean of dorsopalmar and radioulnar lengths) to proximal phalanx of ray 2 (geometric mean of seven measurements; for raw data, see Supplementary Tables 10, 11). h, Tibial cross-section at midshaft (ratio of anteroposterior and mediolateral width; for raw data see Supplementary Table 21). Sample sizes (n) of biologically independent animals are reported in parentheses below each box plot. All box plots show the centre line (median), box limits (upper and lower quartiles), crosses (arithmetic mean), whiskers (range) and individual values (circles).
Box plots of the first polynomial coefficient (A) of the second-order polynomial functional representing phalangeal shaft curvature. The box represents the interquartile range, which represents 50% of the sample values. The whiskers are lines that extend from the interquartile range box to the highest and lowest values, excluding outliers. The line across the box indicates the median sample value for coefficient A. Extant primates are colour-coded according to locomotor adaptation. Taxa are arranged according to ascending median phalangeal shaft curvature. Sample sizes (n) of biologically independent animals are reported in parentheses after the species names.
a, Right patella (GPIT MA/10000-12) in external and internal views. b, Right femur head (GPIT MA/10000-11) in medial, anterior, posterior (top), superior and lateral (bottom) views. c, Left femur head (GPIT MA/10001-02) in medial, posterior, anterior (top), superior and lateral (bottom) views. d, Left femur, proximal half (GPIT MA/10003-01) in anterior (top) and posterior (bottom) views. Scale bar, 10 mm.
Best fit ellipses to digitalized portions of sagittal cross-sections through lateral tibial condyle of D. guggenmosi and extant catarrhines. Digitalized dots are shown in colour and best-fit ellipses in black. Orientation of ellipses follows the lateral condyle orientation (dorsal is up, anterior is left) at the same scale (scale bar, 20 mm). Inset shows calculated values of eccentricity for the obtained ellipses. Results indicate that both Danuvius and extant humans have a flat lateral tibial condyle (eccentricity >0.85), whereas great apes exhibit a convex lateral condyle (eccentricity <0.80) and Cercopithecus occupy an intermediate position.
a, Ratio (natural logarithm) of proximal hallucal phalanx total length to tibial physiologic length, relative to body mass (maximum femur head diameter). b, Box plots of hallux to femur head diameter ratios (natural logarithm). Box plots show the centre line (median), box limits (upper and lower quartiles), cross (arithmetic mean), whiskers (range) and individual values (circles). c, Size-adjusted hallucal phalanx midshaft robusticity (for explanation, see Extended Data Fig. 8c), relative to femur head diameter. All sample sizes (n) of biologically independent animals are reported in parentheses after the species names. For raw data, see Supplementary Tables 7, 22.
a, Left maxilla with three-dimensional rendering of molar roots and maxillary sinus (blue) in lingual (left), anterior (middle) and occlusal (right) views. Sinus runs deep between the posterobuccal and lingual roots of M2, rising anteriorly (dashed black line). Laterally the sinus extends deep into the zygomatic root (dashed white line). b, c, Enamel thickness measured on right M2 (GPIT/MA 10000-03). Computed tomography image of the cross-section at distal sectional plane (b) and graphical conversion (c; grey, enamel; dark grey; dentine).
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Böhme, M., Spassov, N., Fuss, J. et al. A new Miocene ape and locomotion in the ancestor of great apes and humans. Nature 575, 489–493 (2019). https://doi.org/10.1038/s41586-019-1731-0
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