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Sus scrofa tooth China Pleistocene Period (150,000 - 50,000 years) The wild boar (Sus scrofa), also known as the wild swine, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia, North Africa, and the Greater Sunda Islands. Human intervention has spread its distribution further, making the species one of the widest-ranging mammals in the world, as well as the most widely spread suiform. Its wide range, high numbers, and adaptability mean that it is classed as least concern by the IUCN and it has become an invasive species in part of its introduced range. The animal probably originated in Southeast Asia during the Early Pleistocene, and outcompeted other suid species as it spread throughout the Old World. As of 1990, up to 16 subspecies are recognized, which are divided into four regional groupings based on skull height and lacrimal bone length. The species lives in matriarchal societies consisting of interrelated females and their young (both male and female). Fully grown males are usually solitary outside the breeding season. The grey wolf is the wild boar's main predator throughout most of its range except in the Far East and the Lesser Sunda Islands, where it is replaced by the tiger and Komodo dragon, respectively. It has a long history of association with humans, having been the ancestor of most domestic pig breeds and a big-game animal for millennia. Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Artiodactyla Clade: Artiofabula Suborder: Suina Family: Suidae Subfamily: Suinae Genus: Sus Species: scrofa

Sus scrofa tooth China Pleistocene Period (150,000 - 50,000 years) The wild boar (Sus scrofa), also known as the wild swine, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia, North Africa, and the Greater Sunda Islands. Human intervention has spread its distribution further, making the species one of the widest-ranging mammals in the world, as well as the most widely spread suiform. Its wide range, high numbers, and adaptability mean that it is classed as least concern by the IUCN and it has become an invasive species in part of its introduced range. The animal probably originated in Southeast Asia during the Early Pleistocene, and outcompeted other suid species as it spread throughout the Old World. As of 1990, up to 16 subspecies are recognized, which are divided into four regional groupings based on skull height and lacrimal bone length. The species lives in matriarchal societies consisting of interrelated females and their young (both male and female). Fully grown males are usually solitary outside the breeding season. The grey wolf is the wild boar's main predator throughout most of its range except in the Far East and the Lesser Sunda Islands, where it is replaced by the tiger and Komodo dragon, respectively. It has a long history of association with humans, having been the ancestor of most domestic pig breeds and a big-game animal for millennia. Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Artiodactyla Clade: Artiofabula Suborder: Suina Family: Suidae Subfamily: Suinae Genus: Sus Species: scrofa

Sus scrofa tooth China Pleistocene Period (150,000 - 50,000 years) The wild boar (Sus scrofa), also known as the wild swine, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia, North Africa, and the Greater Sunda Islands. Human intervention has spread its distribution further, making the species one of the widest-ranging mammals in the world, as well as the most widely spread suiform. Its wide range, high numbers, and adaptability mean that it is classed as least concern by the IUCN and it has become an invasive species in part of its introduced range. The animal probably originated in Southeast Asia during the Early Pleistocene, and outcompeted other suid species as it spread throughout the Old World. As of 1990, up to 16 subspecies are recognized, which are divided into four regional groupings based on skull height and lacrimal bone length. The species lives in matriarchal societies consisting of interrelated females and their young (both male and female). Fully grown males are usually solitary outside the breeding season. The grey wolf is the wild boar's main predator throughout most of its range except in the Far East and the Lesser Sunda Islands, where it is replaced by the tiger and Komodo dragon, respectively. It has a long history of association with humans, having been the ancestor of most domestic pig breeds and a big-game animal for millennia. Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Artiodactyla Clade: Artiofabula Suborder: Suina Family: Suidae Subfamily: Suinae Genus: Sus Species: scrofa

Sus scrofa tooth China Pleistocene Period (150,000 - 50,000 years) The wild boar (Sus scrofa), also known as the wild swine, Eurasian wild pig, or simply wild pig, is a suid native to much of Eurasia, North Africa, and the Greater Sunda Islands. Human intervention has spread its distribution further, making the species one of the widest-ranging mammals in the world, as well as the most widely spread suiform. Its wide range, high numbers, and adaptability mean that it is classed as least concern by the IUCN and it has become an invasive species in part of its introduced range. The animal probably originated in Southeast Asia during the Early Pleistocene, and outcompeted other suid species as it spread throughout the Old World. As of 1990, up to 16 subspecies are recognized, which are divided into four regional groupings based on skull height and lacrimal bone length. The species lives in matriarchal societies consisting of interrelated females and their young (both male and female). Fully grown males are usually solitary outside the breeding season. The grey wolf is the wild boar's main predator throughout most of its range except in the Far East and the Lesser Sunda Islands, where it is replaced by the tiger and Komodo dragon, respectively. It has a long history of association with humans, having been the ancestor of most domestic pig breeds and a big-game animal for millennia. Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Artiodactyla Clade: Artiofabula Suborder: Suina Family: Suidae Subfamily: Suinae Genus: Sus Species: scrofa

Arcinella cornuta Bi-valve Caloosahatchee Beds, Glades County, Florida Pleistocene Period (2,588,000 to 11,700 years ago) Arcinella cornuta, or the spiny jewel box clam, is a species of bivalve mollusc in the family Chamidae. It can be found along the Atlantic coast of North America, ranging from North Carolina to Florida and Texas. Kingdom: Animalia Phylum: Mollusca Class: Bivalvia Order: Veneroida Family: Chamidae Genus: Arcinella Species: cornuta

Arcinella cornuta Bi-valve Caloosahatchee Beds, Glades County, Florida Pleistocene Period (2,588,000 to 11,700 years ago) Arcinella cornuta, or the spiny jewel box clam, is a species of bivalve mollusc in the family Chamidae. It can be found along the Atlantic coast of North America, ranging from North Carolina to Florida and Texas. Kingdom: Animalia Phylum: Mollusca Class: Bivalvia Order: Veneroida Family: Chamidae Genus: Arcinella Species: cornuta

Trichechus manatus Tooth Florida, USA Pleistocene Period (2,588,000-11,700 years ago) The West Indian manatee (Trichechus manatus) or "sea cow", also known as American manatee, is the largest surviving member of the aquatic mammal order Sirenia (which also includes the dugong and the extinct Steller's sea cow). The West Indian manatee is a species distinct from the Amazonian manatee (T. inunguis) and the African manatee (T. senegalensis). Based on genetic and morphological studies, the West Indian manatee is divided into two subspecies, the Florida manatee (T. m. latirostris) and the Antillean or Caribbean manatee (T. m. manatus). Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Sirenia Family: Trichechidae Genus: Trichechus Species: T. manatus

Trichechus manatus Tooth Florida, USA Pleistocene Period (2,588,000-11,700 years ago) The West Indian manatee (Trichechus manatus) or "sea cow", also known as American manatee, is the largest surviving member of the aquatic mammal order Sirenia (which also includes the dugong and the extinct Steller's sea cow). The West Indian manatee is a species distinct from the Amazonian manatee (T. inunguis) and the African manatee (T. senegalensis). Based on genetic and morphological studies, the West Indian manatee is divided into two subspecies, the Florida manatee (T. m. latirostris) and the Antillean or Caribbean manatee (T. m. manatus). Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Sirenia Family: Trichechidae Genus: Trichechus Species: T. manatus

Trichechus manatus Tooth Florida, USA Pleistocene Period (2,588,000-11,700 years ago) The West Indian manatee (Trichechus manatus) or "sea cow", also known as American manatee, is the largest surviving member of the aquatic mammal order Sirenia (which also includes the dugong and the extinct Steller's sea cow). The West Indian manatee is a species distinct from the Amazonian manatee (T. inunguis) and the African manatee (T. senegalensis). Based on genetic and morphological studies, the West Indian manatee is divided into two subspecies, the Florida manatee (T. m. latirostris) and the Antillean or Caribbean manatee (T. m. manatus). Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Sirenia Family: Trichechidae Genus: Trichechus Species: T. manatus

Trichechus manatus Tooth Florida, USA Pleistocene Period (2,588,000-11,700 years ago) The West Indian manatee (Trichechus manatus) or "sea cow", also known as American manatee, is the largest surviving member of the aquatic mammal order Sirenia (which also includes the dugong and the extinct Steller's sea cow). The West Indian manatee is a species distinct from the Amazonian manatee (T. inunguis) and the African manatee (T. senegalensis). Based on genetic and morphological studies, the West Indian manatee is divided into two subspecies, the Florida manatee (T. m. latirostris) and the Antillean or Caribbean manatee (T. m. manatus). Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Sirenia Family: Trichechidae Genus: Trichechus Species: T. manatus

Ursus spelaeus Cave Bear Molar Tooth Transylvania, Romania Devensian Stage, Pleistocene Period (20,000 Years Old) The cave bear (Ursus spelaeus) was a species of bear that lived in Europe and Asia during the Pleistocene and became extinct about 24,000 years ago during the Last Glacial Maximum. Both the word "cave" and the scientific name spelaeus are used because fossils of this species were mostly found in caves. This reflects the views of experts that cave bears may have spent more time in caves than the brown bear, which uses caves only for hibernation. Cave bears were comparable in size to the largest modern-day bears. Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Ursidae Genus: Ursus Species: †U. spelaeus