Diet provides critical information about the ecology and environment of herbivores. Hence, understanding the dietary strategies of fossil herbivores and the associated temporal changes is one aspect of inferring paleoenvironmental conditions. Here, we present carbon isotope data from more than 1,050 fossil teeth that record the dietary patterns of nine herbivore families in the late Pliocene and early Pleistocene (3.6 to 1.05 Ma) from the Shungura Formation, a hominin-bearing site in southwestern Ethiopia. An increasing trend toward C4herbivory has been observed with attendant reductions in the proportions of browsers and mixed feeders through time. A high proportion of mixed feeders has been observed prior to 2.9 Ma followed by a decrease in the proportion of mixed feeders and an increase in grazers between 2.7 and 1.9 Ma, and a further increase in the proportion of grazers after 1.9 Ma. The collective herbivore fauna shows two major change points in carbon isotope values at ∼2.7 and ∼2.0 Ma. While hominin fossils from the sequence older than 2.7 Ma are attributed to
Haasgat is a primate-rich fossil locality in the northeastern part of the Fossil Hominid Sites of South Africa UNESCO World Heritage Site. Here we report the first hominin identified from Haasgat, a partial maxillary molar (HGT 500), that was recovered from an
- NSF-PAR ID:
- 10016518
- Publisher / Repository:
- PeerJ
- Date Published:
- Journal Name:
- PeerJ
- Volume:
- 4
- ISSN:
- 2167-8359
- Page Range / eLocation ID:
- e2024
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
More Like this
-
Australopithecus , the shift at ∼2.7 Ma indicating the expansion of C4grasses on the landscape was concurrent with the first appearance ofParanthropus . The link between the increased C4herbivory and more open landscapes suggests thatAustralopithecus lived in more wooded landscapes compared to later hominins such asParanthropus andHomo , and has implications for key morphological and behavioral adaptations in our lineage. -
The Gondolin palaeokarstic system, located in the UNESCO Fossil Hominids of South Africa World Heritage Site, has been sporadically excavated since the 1970s. Sampling of ex situ dumpsites in 1997 recovered the only two fossil hominin specimens recovered thus far from Gondolin. While one partial mandibular molar (GA 1) remains unattributed, the complete mandibular second molar (GA 2) represents the largest
Paranthropus robustus Broom, 1938 tooth identified to date. While subsequent excavations and research at Gondolin has clarified the geological, temporal, taphonomic, and palaeoecologic context for the in situ deposits, this paper presents the first comprehensive description of the fossil assemblage ‘associated’ with the two ex situ hominins. Analysis of 42 calcified sediment blocks and naturally decalcified sediments excavated from three cubic metres of the Dump A deposits reinforce that the dump contains a heterogeneous aggregation of materials from across the Gondolin sedimentary deposits. A total of 15,250 individual fossil specimens were processed (via sifting or acetic-acid mediated processing of calcified sediment blocks), yielding a faunal record that largely mirrors that described from either (or both) the GD 1 and GD 2 in situ assemblages but includes representatives of four novel mammal groups (Families Cercopithecidae, Felidae, Herpestidae, Giraffidae) not recorded in either in situ sample. While basic assemblage characteristics including primary taphonomic data is presented, analysis and interpretation is limited by the ex situ origin of the sample. Ultimately, these results reinforce that the substantial mining-mediated obliteration of palaeokarstic deposits at Gondolin continue to obscure a clear association between the Gondolin Dump A hominins and any of the sampled and dated in situ deposits. -
Abstract The Eyasi Plateau Paleontological Expedition (EPPE) Laetoli specimen database contains 13716 records of plant and animal fossils (ca. 28248 specimens) collected by EPPE field teams working at Laetoli, Tanzania between 1998 and 2005. This dataset is a digital version of the original hard-copy specimen catalog, and it documents the discovery, stratigraphic provenience and taxonomic diversity of Plio-Pleistocene fauna and flora in northern Tanzania between 4.4 Ma and >200 ka. Laetoli is renowned for the discovery of important hominin fossils, including the lectotype for
Australopithecus afarensis , one of our early hominin ancestors, the first record ofParanthropus aethiopicus outside Kenya-Ethiopia, and an early record of our own speciesHomo sapiens . This database is one of the few publicly available palaeoanthropological fossil datasets and serves as an example for expanding open access to primary fossil occurrence data in palaeoanthropology. The taxonomic identifications appearing in this dataset are the original field identifications and are provisional. Any taxonomic analysis employing this dataset should refer to updated taxonomic identifications published by specialists. -
null (Ed.)Fossil cercopithecid primates of the African Plio-Pleistocene are often found together in fossil deposits across East and South Africa. These species may have co-occurred in life and exploited similar types of resources in shared environments, as extant monkeys in Africa and Asia are known to do. Some of these fossil species are represented today by congeneric or descendant species with similar adaptations while others have no modern analogue. This project uses dental morphology to compare community structure across potentially co-occurring fossil and modern cercopithecid populations (the cercopithecid taxocene). Relative enamel thickness, shearing potential, and dental shape ratios from the P4 – M3 toothrow were measured from extant (n > 700) and fossil cercopithecid specimens (n > 1000). The latter primarily targeted the Hadar, Shungura, and Koobi Fora Formations of East Africa and the sites of Makapansgat, Sterkfontein, and Swartkrans in South Africa. Principal component analyses were performed separately on the maxillary and mandibular dentitions and resulting component scores were used to reconstruct the taxocene dental morphology at each site. In general, the African cercopithecid taxocene is similar across the main fossil sites analyzed. Patterns of overlap between fossil and modern sites may reflect environmental similarities or the adaptability of generalist cercopithecids. An apparent niche shift from the Plio-Pleistocene to today reflects both taphonomic and ecological factors: a lack of smaller-bodied fossil cercopithecin and colobine species combined with an expanded dental ecomorphological niche of larger-bodied fossil species.more » « less
-
Abstract—This work describes and compares the skull and lower jaw of two species of Rhynchotherium discovered in early Blancan deposits in central Mexico. This comparison establishes the differences between the species Rhynchotherium falconeri and R. browni and is the first record of R. browni outside of San José de Pimas, Sonora. The description of the skull and jaw of the same individual, referred to the gomphotheriid proboscidean Rhynchotherium falconeri, collected in deposits of early Blancan age (3.6 Ma), from the Rancho La Goleta locality, state of Michoacán, Mexico, corresponds to an adult individual that shows these diagnostic characters: deflection of the symphysis down and forward with an angle of 61°, the anterior edge of the ascending ramus at 90°, and the ventral inclination of the horizontal ramus at 25°, which gives it greater depth characteristics in the anterior region under the protolophid of m2. These are characters that support referral to Rhynchotherium falconeri, however, M3/m3 are simple tetraloph/tetralophid, with low cusps and simple trefoils, without accessory cusps or a heel. The anteroposterior length of M3 is among the smallest of Rhynchotherium falconeri known in faunas of North America. These measurements are within the range considered part of sexual dimorphism, so the specimen is assumed to correspond to a female. The skull is domed, the occipital almost straight in relation to the occlusal surface of the molars, the face is more elongate, and the premaxillae are narrow and open, so they are separated in the anterior medial part, the alveoli are complete with apparent divergent direction, and two long fragments of tusks are separated from the alveoli with small evidence of enamel. In the San Miguel de Allende basin, in deposits of early Blancan age (3 Ma) in the Los Galvanes area, the first known record of Rhynchotherium browni was collected outside of San José de Pimas, Sonora. The jaw is larger, and the structures are more robust. The symphysis, although reconstructed, shows a probable inclination of ~77°, and the anterior edge of the ascending rami has an angle of 107°. The mandible presents the alveoli of m1’s, and in front of them an extension of the lingual canal of approximately 70 mm. The horizontal ramus is longer and straighter, and shallower but wider transversely at the base of the ascending rami compared to Rhynchotherium falconeri. The M2 has three lophs, and the metaloph has a remarkable double trefoil. In m2 the tritolophid has a small cusp with signs of wear in the posterior medial part. The M3/m3 are tetraloph with simple trefoils and higher cusps, and have a heel represented by small cusps. The right i2 is complete, with no evidence of enamel.more » « less