iNematomorpha
Scientific classification
Kingdom: Animalia Phylum: Nematomorpha Vejdovsky, 1886
Classes
Nectonematoida Gordioidea Image File history File linksMetadata Download high-resolution version (2484x1698, 423 KB) A horsehair worm (Phylum Nematomorpha), species Paragordius tricuspidatus. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Phyla Subregnum Parazoa Porifera Subregnum Eumetazoa Placozoa Orthonectida Rhombozoa Radiata (unranked) Ctenophora Cnidaria Bilateria (unranked) Acoelomorpha Myxozoa Superphylum Deuterostomia Chordata Hemichordata Echinodermata Chaetognatha Xenoturbellida Superphylum Ecdysozoa Kinorhyncha Loricifera Priapulida Nematoda Nematomorpha Onychophora Tardigrada Arthropoda Superphylum Platyzoa Platyhelminthes Gastrotricha Rotifera Acanthocephala Gnathostomulida Micrognathozoa Cycliophora Superphylum Lophotrochozoa Sipuncula Nemertea Phoronida Bryozoa Entoprocta... Scientific classification or biological classification refers to how biologists group and categorize extinct and living species of organisms. ...

Nematomorpha (sometimes called Gordiacea, and commonly known as horsehair worms or Gordian worms) are a phylum of parasitic animals which are morphologically and ecologically similar to nematode worms, hence the name. They are, on average, 1 metre long, and 1 to 3 millimetres in diameter. Horsehair worms can be discovered in damp areas such as watering troughs, streams, puddles, and cisterns. The adult worms are free living , but the larvae are parasitic on beetles, cockroaches, grasshoppers and crustaceans. About 320 species have been described. Phylum (plural: phyla) is a taxon used in the scientific classification of life. ... A parasite is an organism that lives in or on the living tissue of a host organism at the expense of it. ... Phyla Subregnum Parazoa Porifera Subregnum Eumetazoa Placozoa Orthonectida Rhombozoa Radiata (unranked) Ctenophora Cnidaria Bilateria (unranked) Acoelomorpha Myxozoa Superphylum Deuterostomia Chordata Hemichordata Echinodermata Chaetognatha Xenoturbellida Superphylum Ecdysozoa Kinorhyncha Loricifera Priapulida Nematoda Nematomorpha Onychophora Tardigrada Arthropoda Superphylum Platyzoa Platyhelminthes Gastrotricha Rotifera Acanthocephala Gnathostomulida Micrognathozoa Cycliophora Superphylum Lophotrochozoa Sipuncula Nemertea Phoronida Bryozoa Entoprocta... Comparative anatomy is the study of similarities and differences in organisms. ... Ernst Haeckel coined the term oekologie in 1866. ... Classes Adenophorea    Subclass Enoplia    Subclass Chromadoria Secernentea    Subclass Rhabditia    Subclass Spiruria    Subclass Diplogasteria The nematodes or roundworms (Phylum Nematoda from Greek νῆμα (nema): thread + ode like) are one of the most common phyla of animals, with over 20,000 different described species (over 15,000 are parasitic). ... The metre, or meter (U.S.), is a measure of length. ... A millimetre (American spelling: millimeter, symbol mm) is an SI unit of length that is equal to one thousandth of a metre. ... A larva (Latin; plural larvae) is a juvenile form of animal with indirect development, undergoing metamorphosis (for example, insects or amphibians). ... A parasite is an organism that spends a significant portion of its life in or on the living tissue of a host organism and which causes harm to the host without immediately killing it. ... Suborders Adephaga Archostemata Myxophaga Polyphaga See subgroups of the order Coleoptera Wikispecies has information related to: Coleoptera Beetles are the most diverse group of insects. ... Families Blaberidae Blattellidae Blattidae Cryptocercidae Polyphagidae Nocticolidae Cockroaches are insects of the Order Blattodea. ... Families Superfamily: Tridactyloidea Cylindrachaetidae Ripipterygidae Tridactylidae Superfamily: Tetrigoidea Tetrigidae Superfamily: Eumastacoidea Chorotypidae Episactidae Eumastacidae Euschmidtiidae Mastacideidae Morabidae Proscopiidae Thericleidae Superfamily: Pneumoroidea Pneumoridae Superfamily: Pyrgomorphoidea Pyrgomorphidae Superfamily: Acridoidea Acrididae Charilaidae Dericorythidae Lathiceridae Lentulidae Lithidiidae Ommexechidae Pamphagidae Pyrgacrididae Romaleidae Tristiridae Superfamily: Tanaoceroidea Tanaoceridae Superfamily: Trigonopterygoidea Trigonopterygidae Xyronotidae Grasshoppers are herbivorous insects of... Classes & Subclasses Branchiopoda Phyllopoda Sarsostraca Remipedia Cephalocarida Maxillopoda Thecostraca Tantulocarida Branchiura Pentastomida Mystacocarida Copepoda Ostracoda Myodocopa Podocopa Malacostraca Phyllocarida Hoplocarida Eumalacostraca The crustaceans (Crustacea) are a large group of arthropods, comprising approximately 52,000 described species [1], and are usually treated as a subphylum [2].They include various familiar animals...

Nematomorphs possess an external cuticle without cilia. Internally, they have only longitudinal muscle and a non-functional gut, with no excretory, respiratory or circulatory systems. Reproductively, they are dioecious, with the internal fertilization of eggs that are then laid gelatinous strings. In biology, cuticle or cuticula refers to a more or less tough (but flexible) non-mineral covering of an organism, or part of it. ... cross-section of two cilia, showing 9+2 structure A cilium (plural cilia) is a fine projection from a eukaryotic cell that constantly beats in one direction. ... The excretory system is the system of an organisms body that performs the function of excretion, the bodily process of discharging wastes. ... The Respiratory System Among four-legged animals, the respiratory system generally includes tubes, such as the bronchi, used to carry air to the lungs, where gas exchange takes place. ... Human circulatory system. ... In biology, Dioecious is an adjective which indicates the exisistence of separate sexes in a species of organisms. ...

Spinochordodes tellinii and its grasshopper host

In Spinochordodes tellinii, which has grasshoppers as its vector, the infection acts on the grasshopper's brain and causes it to seek water and drown itself, thus returning the nematomorph to water. Image File history File links Download high resolution version (1500x1125, 218 KB) Summary Spinochordodes tellinii aus seinem Wirt, der Eichenschrecke Meconema thalassinum, austretend (Südfrankreich) Bildspende von D. Andreas Schmidt-Rhaesa, Veröffentlichung unter GNU FDL -- Necrophorus 15:30, 8. ... Image File history File links Download high resolution version (1500x1125, 218 KB) Summary Spinochordodes tellinii aus seinem Wirt, der Eichenschrecke Meconema thalassinum, austretend (Südfrankreich) Bildspende von D. Andreas Schmidt-Rhaesa, Veröffentlichung unter GNU FDL -- Necrophorus 15:30, 8. ... Binomial name Spinochordodes tellinii Camerano, 1888 The nematomorph hairworm Spinochordodes tellinii is a parasitic worm whose larvae develops in grasshoppers. ... Binomial name Spinochordodes tellinii Camerano, 1888 The nematomorph hairworm Spinochordodes tellinii is a parasitic worm whose larvae develops in grasshoppers. ... Traditionally in medicine, a vector is an organism that does not cause disease itself but which spreads infection by conveying pathogens from one host to another. ...

Relationships within the phylum are still somewhat unclear, but two classes are recognised:

• Class Nectonematoida: Marine, planktonic, with a double row of natotory setae along each side of the body; with dorsal and ventral longitudinal epidermal cords, blastocoelom spacious and fluid filled; gonads single; larvae parasitise decapod crustaceans
• Class Gordioidea: Freshwater and semiterrestrial; lack lateral rows of setae; with a single, ventral epidermal cord; blastocoelom filled with mesenchyme in young animals but becomes spacious in older individuals; larvae parasitise grasshoppers and crickets

A seta is a stiff hair, wierd, culy, things bristle, or bristle-like process or part of an organism. ... The gonad is the organ that makes gametes. ... Suborders and Infraorders Dendrobranchiata Pleocyemata Caridea Stenopodidea Reptantia, comprising: Eryonoidea Achelata Astacidea Glypheidea Thalassinidea Anomala Brachyura The decapods or Decapoda are a group of crustaceans within the class Malacostraca, including many familiar groups of crustaceans, such as crabs, lobsters and shrimp, but also some families that are less well known. ... Mesenchyme (also known as embryonic connective tissue) is the mass of tissue that develops mainly from the mesoderm (the middle layer of the trilaminar germ disc) of an embryo. ... For the insect, see Cricket (insect). ...

External links

• Video of a cricket infected with a Gordian worm committing suicide