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The Myllokummingia is a primitive, probably agnathid (jawless) fish from the Lower Cambrian Maotianshan shales of China thought to be a vertebrate (see external links). It somewhat resembles hagfish, a modern agnathid. It is described as 28mm long and 6mm high. Groups Myxinoidea (hagfish) Hyperoartia Petromyzontidae (lampreys) Pteraspidomorphi Thelodonti Anaspida Cephalaspidomorphi Galeaspida Pituriaspida Osteostraci Agnatha (Greek, no jaws) is a paraphyletic superclass of jawless fish in the phylum Chordata, subphylum Vertebrata. ...
The Cambrian is a major division of the geologic timescale that begins about 542 million years before the present (BP) at the end of the Proterozoic eon and ended about 490 million years BP with the beginning of the Ordovician period. ...
The Maotianshan shale is an early Cambrian rock formation exposed in the Yunnan Province of China in the villages of Ercaicun and Chengjiang near the city of Kunming. ...
Groups Conodonta Hyperoartia Petromyzontidae (lampreys) Pteraspidomorphi (early jawless fish) Thelodonti Anaspida Cephalaspidomorphi (early jawless fish) Galeaspida Pituriaspida Osteostraci Gnathostomata (jawed vertebrates) Placodermi Chondrichthyes (cartilaginous fish) Acanthodii Osteichthyes (bony fish) Actinopterygii (ray-finned fish) Sarcopterygii (lobe-finned fish) Actinistia (coelacanths) Dipnoi (lungfish) Tetrapoda Amphibia Amniota Sauropsida/(Reptiles) Aves (Birds) Synapsida Mammalia...
It is the oldest vertebrate known, found in rocks of the cambrian period (530-million-years old). It appears to have a skull an skeletal structures made of cartilage (like Lamprey that is also a vertebrate). There is no sign of mineralization of the skeletal elements (biomineralization). Subfamilies Geotriinae Mordaciinae Petromyzontinae A lamprey is a jawless fish with a toothed, funnel-like sucking mouth, with which most species bore into the flesh of other fishes to suck their blood. ...
This article is about minerals in the geologic sense; for nutrient minerals see dietary mineral; for the band see Mineral (band). ...
The holotype was found in the Yuanshan member of the Qiongzhusi Formation in the 'Eoredlichia' Zone near Haikou at Ercaicun, Kunming City, Yunnan, China. The animal has a distinct head and trunk with a forward sail-like (1.5mm) dorsal fin and a ventral fin fold (probably paired) further back. The head has five or six gill pouches with hemibranchs. There are 25 segments (myomeres) with rear directed Vs in the trunk. There is a notochord, a pharynx and digestive tract that may run all the way to the rear tip of the animal. The mouth can not be clearly identified. There may be a pericardic cavity. There are no fin radials. There is only one specimen which has the tip of the tail buried in sediment. A holotype is one of several possible types. ...
Yunnan (Simplified Chinese: 云å—; Traditional Chinese: 雲å—; pinyin: ; Vietnamese: Vân Nam) is a province of the Peoples Republic of China, located in the far southwestern corner of the country. ...
The notochord is a flexible rod-shaped body found in embryos of all chordates. ...
For the Physics term GUT, please refer to Grand unification theory The gastrointestinal or digestive tract, also referred to as the GI tract or the alimentary canal or the gut, is the system of organs within multicellular animals which takes in food, digests it to extract energy and nutrients, and...
Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of water or other liquid. ...
A similar creature from these shales is known as Haikouichthys. Suspected chordates (more primitive hemichordates) are also known from these deposits. The Haikouichthys is a primitive fish-like animal from the Lower Cambrian Maotianshan shales of China. ...
Classes Enterepneusta Pterobranchia Planctosphaeroidea Hemichordata is a phylum of deuterostome animals, generally considered the sister group of our own, the chordates. ...
There is one species - Myllokummingia fengjiaoa (Shu, Zhang & Han).
External links
- See the following web sites for more information and pictures:
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