| Pseudodon | |
|---|---|
 | |
| Shell of Pseudodon inoscularis | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Unionida |
| Family: | Unionidae |
| Genus: | Pseudodon Gould, 1844 |
Pseudodon is a genus of bivalvia of the Unionidae family that is native to East and Southeast Asia. There are 14 recognized species.
The taxon was described by John Gould from his findings at the Salween River Basin in British Burma as a subgenus of the genus Anodon . Gould included two species in the taxon, the type species Anodon inoscularis and Anodon salweniana. [1]
The shell of Pseudodon is rather thick and shaped like an elongated oval, with a slightly convex crown on the upper valve shifted toward the rear. [2] The surface, although most often smooth, is in some species crossed by deep transverse furrows. The hinge teeth are high, thick, and rounded at the apices. [3]
The habitat of the genus is limited to East and Southeast Asia, mainly the Yangtze River Basin and Myanmar. [3] The species Pseudodon inoscularis is also found in Thailand, Cambodia, and southern Vietnam, while the species Pseudodon resupinatus is endemic to northern Vietnam, [4] and the species Pseudodon vondembuschianus is found in Indonesia and Indochina. [5]
Pseudodon shell DUB1006-fL is a fossil shell of Pseudodon vondembuschianus trinilensis that was found in Trinil, Java, Indonesia. The shell has a zigzag pattern engraved on it by a Homo erectus . It was carved between 540,000 and 430,000 years before present, and is the oldest known anthropogenic carving in the world. [6] There is an ongoing controversy on whether or not the carving can qualify as art (which would make it the oldest piece of art in the world). Some commentators call it a "doodle" [7] or "decorative marks", [8] while others suggest that the carving is explicitly art. [9] [10] [11]
Marie Eugène François Thomas Dubois was a Dutch paleoanthropologist and geologist. He earned worldwide fame for his discovery of Pithecanthropus erectus, or "Java Man". Although hominid fossils had been found and studied before, Dubois was the first anthropologist to embark upon a purposeful search for them.
Pinctada is a genus of saltwater oysters, marine bivalve mollusks in the family Pteriidae. These pearl oysters have a strong inner shell layer composed of nacre, also known as "mother of pearl".
Solo Man is a subspecies of H. erectus that lived along the Solo River in Java, Indonesia, about 117,000 to 108,000 years ago in the Late Pleistocene. This population is the last known record of the species. It is known from 14 skullcaps, two tibiae, and a piece of the pelvis excavated near the village of Ngandong, and possibly three skulls from Sambungmacan and a skull from Ngawi depending on classification. The Ngandong site was first excavated from 1931 to 1933 under the direction of Willem Frederik Florus Oppenoorth, Carel ter Haar, and Gustav Heinrich Ralph von Koenigswald, but further study was set back by the Great Depression, World War II and the Indonesian War of Independence. In accordance with historical race concepts, Indonesian H. erectus subspecies were originally classified as the direct ancestors of Aboriginal Australians, but Solo Man is now thought to have no living descendants because the remains far predate modern human immigration into the area, which began roughly 55,000 to 50,000 years ago.
Homo is a monotypic genus that emerged from the genus Australopithecus and encompasses the extant species Homo sapiens and several extinct species classified as either ancestral to or closely related to modern humans, including Homo erectus and Homo neanderthalensis. The oldest member of the genus is Homo habilis, with records of just over 2 million years ago. Homo, together with the genus Paranthropus, is probably sister to Australopithecus africanus, which itself had split from the lineage of Pan, the chimpanzees.
Java Man is an early human fossil discovered in 1891 and 1892 on the island of Java (Indonesia). Estimated to be between 700,000 and 1,490,000 years old, it was, at the time of its discovery, the oldest hominid fossil ever found, and it remains the type specimen for Homo erectus.
Human taxonomy is the classification of the human species within zoological taxonomy. The systematic genus, Homo, is designed to include both anatomically modern humans and extinct varieties of archaic humans. Current humans have been designated as subspecies Homo sapiens sapiens, differentiated, according to some, from the direct ancestor, Homo sapiens idaltu.
Trinil is a palaeoanthropological site on the banks of the Bengawan Solo River in Ngawi Regency, East Java Province, Indonesia. It was at this site in 1891 that the Dutch anatomist Eugène Dubois discovered the first early hominin remains to be found outside of Europe: the famous "Java Man" specimen.
The Unionidae are a family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids.
Ngawi Regency is an inland regency (kabupaten) of Indonesia, on the island of Java. Ngawi is well known around the world for its Pithecantropus erectus which was found by Eugene Dubois, a Dutchman. Ngawi is located in East Java Province but adjoins Central Java province. Its capital Ngawi (city). Ngawi is also the main gate to enter East Java province since there are intersections that connect Surabaya–Bojonegoro–Ngawi (city)–Solo–Jogja–Bandung–Jakarta. The Regency covers an area of 1,394.74 km2 (538.51 sq mi), and had a population of 817,765 at the 2010 census and 870,057 at the 2020 census; the official estimate as of mid-2023 was 904,094.
Unio is a genus of medium-sized freshwater mussels, aquatic bivalve mollusks in the family Unionidae, the river mussels. They are found throughout Europe, Africa, and the Middle East, with some species introduced to East Asia. Fossil species are also known from the Jurassic of North America.
Unionida is a monophyletic order of freshwater mussels, aquatic bivalve molluscs. The order includes most of the larger freshwater mussels, including the freshwater pearl mussels. The most common families are the Unionidae and the Margaritiferidae. All have in common a larval stage that is temporarily parasitic on fish, nacreous shells, high in organic matter, that may crack upon drying out, and siphons too short to permit the animal to live deeply buried in sediment.
Freshwater bivalves are one kind of freshwater mollusc, along with freshwater snails. They are bivalves that live in fresh water as opposed to salt water, which is the main habitat type for bivalves.
Prehistoric Asia refers to events in Asia during the period of human existence prior to the invention of writing systems or the documentation of recorded history. This includes portions of the Eurasian land mass currently or traditionally considered as the continent of Asia. The continent is commonly described as the region east of the Ural Mountains, the Caucasus Mountains, the Caspian Sea, Black Sea and Red Sea, bounded by the Pacific, Indian, and Arctic Oceans. This article gives an overview of the many regions of Asia during prehistoric times.
Homo erectus is an extinct species of archaic human from the Pleistocene, with its earliest occurrence about 2 million years ago. Its specimens are among the first recognizable members of the genus Homo.
Villosa iris, the rainbow mussel or rainbow-shell, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. In 2018, Watters proposed to move the species into a new genus, Cambarunio.
The oldest undisputed examples of figurative art are known from Europe and from Sulawesi, Indonesia, dated about 35,000 years old . Together with religion and other cultural universals of contemporary human societies, the emergence of figurative art is a necessary attribute of full behavioral modernity.
Prehistoric Indonesia is a prehistoric period in the Indonesian archipelago that spanned from the Pleistocene period to about the 4th century CE when the Kutai people produced the earliest known stone inscriptions in Indonesia. Unlike the clear distinction between prehistoric and historical periods in Europe and the Middle East, the division is muddled in Indonesia. This is mostly because Indonesia's geographical conditions as a vast archipelago caused some parts — especially the interiors of distant islands — to be virtually isolated from the rest of the world. West Java and coastal Eastern Borneo, for example, began their historical periods in the early 4th century, but megalithic culture still flourished and script was unknown in the rest of Indonesia, including in Nias and Toraja. The Papuans on the Indonesian part of New Guinea island lived virtually in the Stone Age until their first contacts with modern world in the early 20th century. Even today living megalithic traditions still can be found on the island of Sumba and Nias.
The region of Southeast Asia is considered a possible place for the evidence of archaic human remains that could be found due to the pathway between Australia and mainland Southeast Asia, where the migration of multiple early humans has occurred out of Africa. One of many pieces of evidence is of the early human found in central Java of Indonesia in the late 19th century by Eugene Dubois, and later in 1937 at Sangiran site by G.H.R. van Koenigswald. These skull and fossil materials are Homo erectus, named Pithecanthropus erectus by Dubois and Meganthropus palaeojavanicus by van Koenigswald. They were dated to c. 1.88 and 1.66 Ma, as suggested by Swisher et al. by analysis of volcanic rocks.
Mececyon trinilensis, the Trinil dog, is an extinct canid species that lived on the island of Java in Indonesia during the Pleistocene.
The Pseudodon shell DUB1006-fL or Pseudodon DUB1006-fL is a fossil freshwater shell of Pseudodon vondembuschianus trinilensis found at Trinil, Java, Indonesia. The shell has a zigzag engraving supposedly made by Homo erectus, which could be the oldest known anthropogenic engraving in the world.
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