Palaeoloxodon huaihoensis

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Palaeoloxodon huaihoensis
Temporal range: Pleistocene
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Palaeoloxodon Skeleton (cropped).JPG
Skeleton of Palaeoloxodon huaihoensis at National Museum of Natural Science, Taiwan
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Proboscidea
Family: Elephantidae
Genus: Palaeoloxodon
Species:
P. huaihoensis
Binomial name
Palaeoloxodon huaihoensis
Liu, 1977

Palaeoloxodon huaihoensis is an extinct species of elephant belonging to the genus Palaeoloxodon known from the Pleistocene of China.

Taxonomy

It was first named a subspecies of P. naumanni (which is principly known from material found in Japan) by J. Liu in 1977 based on a partial skeleton from Huaiyuan, Anhui, [1] and was later elevated to species rank by G. Qi in 1999, who also included other Chinese Palaeoloxodon remains within species, including the abundant remains found in the Penghu Channel between the Penghu archipelago and Taiwan. [2] [3] A mostly complete adult skull (IVPP V4443) from Late Pleistocene Nihewan basin in Hebei may be referrable to this species. [3]

Description

The body size is very large, comparable to Indian Palaeoloxodon namadicus and the European straight-tusked elephant (P. antiquus). In comparison to Indian P. namadicus, the postcranial skeleton is substantially more robust, and greatly resembles that of P. antiquus. The morphology of IVPP V4443 is also overall more similar to that of P. antiquus than P. namadicus, but the parietal-occipital crest at the top of the skull displays a very robust morphology closer to that of P. namadicus. [3]

Distribution

Remains of Palaeoloxodon are widespread in China, ranging from Northeast China to Xinjiang in the northwest to Hainan and Yunnan in the south, though most remains of Palaeoloxodon in China are from the North China Plain region. [4] Material from the Pengu Channel sample predominantly represents adult individuals. [5]

Evolution and extinction

The oldest remains of Palaeoloxodon in North China date to the early Middle Pleistocene, around 700,000 years ago. [6] The latest dates for Palaeoloxodon in China are from the Late Pleistocene, and a Holocene survival is not substantiated, [7] though the actual timing of extinction is uncertain due to a lack of reliable dating. [4] Mitochondrial genomes retrieved from Chinese Palaeoloxodon individuals from North China reveal that like the European P. antiquus, they harboured mitochondrial lineages derived from those of African forest elephants as a result of hybridisation with that species prior to Palaeoloxodon leaving Africa. [4] The close relationship between the mitochondrial genomes of a Chinese Palaeoloxodon and a European P. antiquus individual suggests that there may have been gene flow between the two populations following their initial divergence. [4]

Diagram of the relationships of elephant mitochondrial genomes, after Lin et al. 2023. [4]

Elephantidae

Elephas (Asian elephant)

Mammuthus (mammoths)

Loxodonta africana (African bush elephant)

Palaeoloxodon+Loxodonta cyclotis

North central African forest elephant clade

Chinese Palaeoloxodon

Chinese Palaeoloxodon

Palaeoloxodon antiquus (Germany)

West central African forest elephant clade

Western African forest elephant clade

Paleoloxodon antiquus (Germany)

Palaeoloxodon cf. mnaidriensis (Sicily)

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<span class="mw-page-title-main">Elephantidae</span> Family of mammals

Elephantidae is a family of large, herbivorous proboscidean mammals collectively called elephants and mammoths. These are large terrestrial mammals with a snout modified into a trunk and teeth modified into tusks. Most genera and species in the family are extinct. Only two genera, Loxodonta and Elephas, are living.

<i>Elephas</i> Genus of mammals

Elephas is one of two surviving genera in the family of elephants, Elephantidae, with one surviving species, the Asian elephant, Elephas maximus. Several extinct species have been identified as belonging to the genus, extending back to the Pliocene era.

<i>Palaeoloxodon</i> Genus of extinct elephants

Palaeoloxodon is an extinct genus of elephant. The genus originated in Africa during the Early Pleistocene, and expanded into Eurasia at the beginning of the Middle Pleistocene. The genus contains some of the largest known species of elephants, over 4 metres (13 ft) tall at the shoulders, including the African Palaeoloxodon recki, the European straight-tusked elephant and the South Asian Palaeoloxodon namadicus. P. namadicus has been suggested to be the largest known land mammal by some authors based on extrapolation from fragmentary remains, though these estimates are highly speculative. In contrast, the genus also contains many species of dwarf elephants that evolved via insular dwarfism on islands in the Mediterranean, some only 1 metre (3.3 ft) in height, making them the smallest elephants known. The genus has a long and complex taxonomic history, and at various times, it has been considered to belong to Loxodonta or Elephas, but today is usually considered a valid and separate genus in its own right.

<i>Stegodon</i> Genus of extinct proboscidean

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<i>Palaeoloxodon recki</i> Extinct species of elephant

Palaeoloxodon recki, often known by the synonym Elephas recki is an extinct species of elephant native to Africa and West Asia from the Pliocene or Early Pleistocene to the Middle Pleistocene. During most of its existence, the species represented the dominant elephant species in East Africa. The species is divided into five roughly chronologically successive subspecies. While the type and latest subspecies P. recki recki as well as the preceding P. recki ileretensis are widely accepted to be closely related to Eurasian Palaeoloxodon, the relationships of the other, chronologically earlier subspecies to P. recki recki and P. recki ileretensis are uncertain, with it being suggested they are unrelated and should be elevated to separate species.

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<i>Mammuthus meridionalis</i> Extinct species of mammal

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<i>Equus sivalensis</i> Extinct species of mammal

Equus sivalensis is an extinct species of large equid native to the northern Indian subcontinent. Remains date from the beginning of the Pleistocene, c. 2.58 million years ago until around 600,000 years ago, during the Middle Pleistocene. It is considered a "stenonine horse", meaning that it is more closely related to zebras and asses than true horses. Based on isotopes and teeth morphology, it is thought to have been a grazer. The later species Equus namadicus from the same region has sometimes been suggested to be a synonym due to their similar teeth morphology.

<i>Palaeoloxodon namadicus</i> Extinct species of elephant

Palaeoloxodon namadicus is an extinct species of prehistoric elephant known from the early Middle to Late Pleistocene of the Indian subcontinent, and possibly also elsewhere in Asia. The species grew larger than any living elephant, and some authors have suggested it to have been the largest known land mammal based on extrapolation from fragmentary remains, though these estimates are speculative.

<i>Palaeoloxodon cypriotes</i> Extinct species of elephant

Palaeoloxodon cypriotes is an extinct species of dwarf elephant that inhabited the island of Cyprus during the Late Pleistocene. Remains comprise 44 molars, found in the north of the island, seven molars discovered in the south-east, a single measurable femur and a single tusk among very sparse additional bone and tusk fragments. The molars support derivation from the large straight-tusked elephant (Palaeoloxodon antiquus). The species is presumably derived from the older, larger P. xylophagou from the late Middle Pleistocene which reached the island presumably during a Pleistocene glacial maximum when low sea levels allowed a low probability sea crossing between Cyprus and Asia Minor. During subsequent periods of isolation the population adapted within the evolutionary mechanisms of insular dwarfism, which the available sequence of molar fossils confirms to a certain extent. The fully developed Palaeoloxodon cypriotes weighed not more than 200 kg (440 lb) and had a height of around 1 m (3.28 ft). The species became extinct around 12,000 years ago, around the time humans first colonised Cyprus.

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<i>Palaeoloxodon mnaidriensis</i> Extinct species of elephant

Palaeoloxodon mnaidriensis is an extinct species of dwarf elephant belonging to the genus Palaeoloxodon, native to the Siculo-Maltese archipelago during the late Middle Pleistocene and Late Pleistocene. It is derived from the European mainland straight-tusked elephant.

<i>Palaeoloxodon naumanni</i> Extinct species of elephant

Palaeoloxodon naumanni, occasionally called Naumann's elephant, is an extinct species belonging to the genus Palaeoloxodon found in the Japanese archipelago during the Middle to Late Pleistocene around 330,000 to 24,000 years ago. It is named after Heinrich Edmund Naumann who discovered the first fossils at Yokosuka, Kanagawa, Japan. Fossils attributed to P. naumanni are also known from China and Korea, though the status of these specimens is unresolved, and some authors regard them as belonging to separate species.

<span class="mw-page-title-main">Narrow-nosed rhinoceros</span> Extinct species of rhinoceros

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<i>Stephanorhinus kirchbergensis</i> Extinct species of mammal

Stephanorhinus kirchbergensis, also known as Merck's rhinoceros or the forest rhinoceros, is an extinct species of rhinoceros belonging to the genus Stephanorhinus from the Middle to Late Pleistocene of Eurasia. Its range spanned from western Europe to eastern Asia. Among the last members of the genus, it co-existed alongside Stephanorhinus hemitoechus in the western part of its range.

<span class="mw-page-title-main">Penghu Channel</span>

The Penghu Channel or Pescadores Channel is the body of water that separates the Penghu islands from Taiwan island and links the Taiwan Strait to the northeastern South China Sea. The channel has been considered narrow and potentially difficult to navigate in monsoon season. The channel is known for Pleistocene aged fossils dredged up from bottom sediments, including the archaic human mandible Penghu 1 as well as the extinct elephant Palaeoloxodon huaihoensis.

References

  1. J. Liu Palaeoloxodon from Huaiyuan District, northern part of Anhui Vertebr. Palasiat., 15 (1977), pp. 272-284
  2. G. Qi On some problems of Palaeoloxodon of China (in Chinese with English Abstract) Y. Wang, T. Deng (Eds.), Proceedings of the Seventh Annual Meeting of the Chinese Society of Vertebrate Paleontology, China Ocean Press, Beijing (1999), pp. 201-210
  3. 1 2 3 Larramendi, Asier; Zhang, Hanwen; Palombo, Maria Rita; Ferretti, Marco P. (February 2020). "The evolution of Palaeoloxodon skull structure: Disentangling phylogenetic, sexually dimorphic, ontogenetic, and allometric morphological signals". Quaternary Science Reviews. 229: 106090. Bibcode:2020QSRv..22906090L. doi:10.1016/j.quascirev.2019.106090. S2CID   213676377.
  4. 1 2 3 4 5 Lin, Haifeng; Hu, Jiaming; Baleka, Sina; Yuan, Junxia; Chen, Xi; Xiao, Bo; Song, Shiwen; Du, Zhicheng; Lai, Xulong; Hofreiter, Michael; Sheng, Guilian (July 2023). "A genetic glimpse of the Chinese straight-tusked elephants". Biology Letters. 19 (7). doi:10.1098/rsbl.2023.0078. ISSN   1744-957X. PMC  10353889. PMID   37463654.
  5. Kang, Jia-Cih; Lin, Chien-Hsiang; Chang, Chun-Hsiang (2021-04-14). "Age and growth of Palaeoloxodon huaihoensis from Penghu Channel, Taiwan: significance of their age distribution based on fossils". PeerJ. 9: e11236. doi: 10.7717/peerj.11236 . ISSN   2167-8359. PMC   8052959 . PMID   33954049.
  6. Jin, Changzhu; Wang, Yuan; Liu, Jinyuan; Ge, Junyi; Zhao, Bo; Liu, Jinyi; Zhang, Hanwen; Shao, Qingfeng; Gao, Chunling; Zhao, Keliang; Sun, Boyang; Qin, Chao; Song, Yayun; Jiangzuo, Qigao (2021-03-10). "Late Cenozoic mammalian faunal evolution at the Jinyuan Cave site of Luotuo Hill, Dalian, Northeast China". Quaternary International. 577: 15–28. doi:10.1016/j.quaint.2021.01.011. ISSN   1040-6182.
  7. Turvey, Samuel T.; Tong, Haowen; Stuart, Anthony J.; Lister, Adrian M. (September 2013). "Holocene survival of Late Pleistocene megafauna in China: a critical review of the evidence". Quaternary Science Reviews. 76: 156–166. doi:10.1016/j.quascirev.2013.06.030.