Mammuthus meridionalis

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Mammuthus meridionalis
Temporal range: 2.5–0.8  Ma
Museum of Natural History Southern Mammoth.jpg
Mounted skeleton, Muséum national d'Histoire naturelle, Paris
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Proboscidea
Family: Elephantidae
Genus: Mammuthus
Species:
M. meridionalis
Binomial name
Mammuthus meridionalis
(Nesti, 1825)
Synonyms
  • Archidiskodon meridionalis
  • Mammuthus gromovi (Alexeeva & Garutt, 1965)
  • Mammuthus meridionalis vestinus
  • M. m. voigtstedtensis (Dietrich, 1965)

Mammuthus meridionalis, sometimes called the southern mammoth, is an extinct species of mammoth native to Eurasia, including Europe, during the Early Pleistocene, living from around 2.5 million years ago to 800,000 years ago.

Contents

Taxonomy

Molar Mammuthus meridionalis molar.JPG
Molar

Mammuthus meridionalis was originally named by Filippo Nesti in 1825 as Elephas meridionalis based on remains collected from the Upper Valdarno region in Tuscany, Italy. [1]

The taxonomy of extinct elephants was complicated by the early 20th century, and in 1942, Henry Fairfield Osborn's posthumous monograph on the Proboscidea was published, wherein he used various taxon names that had previously been proposed for mammoth species, including replacing Mammuthus with Mammonteus, as he believed the former name to be invalidly published. [2] Mammoth taxonomy was simplified by various researchers from the 1970s onwards, all species were retained in the genus Mammuthus, and many proposed differences between species were instead interpreted as intraspecific variation. [3] The name Archidiskodon meridionalis is retained by some Russian researchers. [4] [5]

Description

Skeletal restoration of a 4 metre tall male M. meridionalis skeletal.png
Skeletal restoration of a 4 metre tall male
Complete skeleton in the Museo Nazionale d'Abruzzo, Italy Mammuthus meridionalis (L'Aquila).JPG
Complete skeleton in the Museo Nazionale d'Abruzzo, Italy

M. meridionalis was a large proboscidean, exceeding modern elephants in size. [6] A mature adult male known from a mostly complete skeleton displayed at Forte Spagnolo, L'Aquila, Italy, estimated to be approximately 3.97–4.05 m (13.0–13.3 ft) tall at the shoulder in the flesh, was volumetrically estimated to weigh 10.7–11.4 tonnes (11.8–12.6 short tons). [6] [7] Such sizes are suggested to have been typical for males of this species. [6] Like modern elephants females were considerably smaller, with estimated average adult shoulder height of 3.3 m (10.8 ft) and a weight of around 7 tonnes (7.7 short tons). [8]

The skull was prominently domed, though the height of the dome was lower than later mammoth species. The head represented the highest point of the animal. The body was broad and the back was noticeably sloped. It had robust, elongated twisted tusks, common of mammoths. [8] Its molars had low crowns [9] and around 13 thick enamel ridges (lamellae) on the third molars, substantially lower than the number in later mammoth species. [10] M. meridionalis in relatively warm climates, which makes it more probable that it lacked dense fur. [9] The ears are also suggested to have been medium-large sized, with the tail being shorter than living elephants but longer than later mammoth species. [8]

Later European M. meridionalis populations differ from early representatives of the species by having shorter and taller skulls and mandibles, differing shapes of the temporal fossa, orbits and tusk alveoli (sockets), and an increase in the number of lamellae on the teeth and tooth crown height (hypsodonty). [11]

Ecology

Fossilized plants found with the remains show that M. meridionalis was living in a time of mild climate, generally as warm or slightly warmer than Europe experiences today. Some populations inhabited woodlands, which included oak, ash, beech and other familiar European trees, as well as some that are now exotic to the region, such as hemlock, wing nut and hickory. Complete skeletons are in Stavropol State Museum in Russia, in L'Aquila National Museum and in Firenze at the Museo di Storia Naturale di Firenze in Italy. Further east, discoveries at Ubeidiya (Israel) and Dmanisi (Georgia) show the early mammoth living in a partially open habitat with grassy areas. [9]

Dental microwear of the teeth of M. meridionalis suggest that the species was a variable mixed feeder, that consumed both grass and browse, with its diet varying according to local conditions, with some populations exhibiting browse-dominated mixed feeding, while others grass-dominant. [12]

During the early part of its existence in Europe, it existed alongside the "tetralophodont gomphothere" Anancus arvernensis . Dietary analysis based on microwear suggests that there was niche partitioning between the two species, with M. meridonalis occupying more open habitats. [13]

Evolution

Since many remains of each species of mammoth are known from several localities, it is possible to reconstruct the evolutionary history of the genus through morphological studies. Mammoth species can be identified from the number of enamel ridges (or lamellar plates) on their molars: primitive species had few ridges, and the number increased gradually as new species evolved to feed on more abrasive food items. The crowns of the teeth became deeper in height and the skulls became taller to accommodate this. At the same time, the skulls became shorter from front to back to minimise the weight of the head. [14] [15]

Mammuthus meridionalis is thought to descend from Mammuthus rumanus , the oldest mammoth species known outside of Africa, with the earliest records of M. meridionalis dating to around 2.6-2.5 million years ago, at the beginning of the Pleistocene. [14] Some early members of M. meridionalis spanning from 2.6-2.0 million years ago were historically assigned to the species M. gromovi, which some authors have regarded as the subspecies M. meridionalis gromovi. [14] [11] A population of M. meridionalis evolved into the steppe mammoth (M. trogontherii) with 18–20 third molar ridges in eastern Asia, prior to 1.7 million years ago. [10] The Columbian mammoth (M. columbi) evolved from a population of M. trogontherii that had crossed the Bering Strait and entered North America about 1.5 million years ago, and not M. meridionalis as has been historically suggested. [10] [16] [17] European M. meridionalis specimens from around 2-1.7 million years ago are assigned to the subspecies M. meridionalis meridionalis. Advanced late Early Pleistocene populations of M. meridionalis in Europe, spanning from around 1.7-0.8 million years ago are assigned to the subspecies M. meridionalis vestinus (including the likely synonym M. meridionalis depereti) and M. meridionalistamanensis. These two subspecies may be synonymous with each other. [11] Steppe mammoths replaced M. meridionalis in Europe in a diachronous mosaic pattern at the end of the Early Pleistocene, between around 1 and 0.8-0.7 million years ago, which was also co-incident with the arrival of the straight-tusked elephant (Palaeoloxodon antiquus) into Europe, which may have out-competed M. meridionalis . [14] [11] During the interval of replacement, M. meridionalis and M. trogontherii may have co-existed in some localities, with rare specimens with molar morphology intermediate between the two species suggesting that there may have been hybridisation between them. [18]

The dwarf mammoth species Mammuthus creticus , which inhabited the island of Crete at some point during the Early Pleistocene to early Middle Pleistocene, is suggested to have descended from M. meridionalis. [19]

Mammuthus meridionalis reconstruction Mammuthus meridionalis reconstruction 2.jpg
Mammuthus meridionalis reconstruction

Relationship with humans

Remains of M. meridionalis at several sites have been found with cut marks and/or associated with stone tools, suggested to represent evidence of butchery by archaic humans. [20] A number of bones of Mammuthus meridionalis from the Dmanisi site in Georgia, dating to 1.8 million years ago have cut marks likely created by local Homo erectus. [21] At the Fuente Nueva-3 and Barranc de la Boella sites in Spain, dating to approximately 1.3 and 1-0.8 million years ago respectively, remains of M. meridionalis are associated with stone tools (in the latter site of the Acheulean type), primarily lithic flakes. At Barranc de la Boella, some rib bones possibly bear cut marks, [20] with cut marks being definitvely reported from bones found at Fuente Nueva-3. [22] These sites likely represent evidence of opportunistic scavenging, rather than active hunting. [23]

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<span class="mw-page-title-main">Proboscidea</span> Order of elephant-like mammals

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A mastodon is a member of the genus Mammut, which, strictly defined, was endemic to North America and lived from the late Miocene to the early Holocene. Mastodons belong to the order Proboscidea, the same order as elephants and mammoths. Mammut is the type genus of the extinct family Mammutidae, which diverged from the ancestors of modern elephants at least 27-25 million years ago, during the Oligocene.

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

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<span class="mw-page-title-main">Mammutidae</span> Extinct family of mammals

Mammutidae is an extinct family of proboscideans belonging to Elephantimorpha. It is best known for the mastodons, which inhabited North America from the Late Miocene until their extinction at beginning of the Holocene, around 11,000 years ago. The earliest fossils of the group are known from the Late Oligocene of Africa, around 24 million years ago, and fossils of the group have also been found across Eurasia. The name "mastodon" derives from Greek, μαστός "nipple" and ὀδούς "tooth", referring to their characteristic teeth.

<i>Elephas</i> Genus of mammals

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<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

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<span class="mw-page-title-main">Straight-tusked elephant</span> Extinct species of elephant native to Europe and West Asia

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

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Mammuthus rumanus is a species of mammoth that lived during the Pliocene in Eurasia. It the oldest mammoth species known outside of Africa.

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Bibliography

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