Animals Animals A dewclaw is a vestigial digit on some mammals' legs. It grows higher on the leg so that, when the animal is standing, it does not make contact with the ground. ...more on Wikipedia about "Dewclaw"
The Dickin Medal was instituted in 1943 by Maria Dickin to honour the work of animals in war. It has become recognised as "the animals' VC". ...more on Wikipedia about "Dickin Medal"
Digenea (Gr. Dis - double, Genos - race) is a subclass within the Platyhelminthes consisting of parasitic flatworms with a syncytial tegument and, usually, two suckers, one ventral and one oral. They are particularly common in the digestive tract, but occur throughout the organ systems of all classes of vertebrates. Once thought to be related to the Monogenea, it is now recognised that they are closest to the Aspidogastrea and that the Monogenea are more closely allied with the Cestoda. Around 6000 species have been described to date. ...more on Wikipedia about "Digenea"
The Ecdysozoa are a group of protostome animals, including the Arthropoda, Nematoda, and several smaller phyla. They were first defined by Aguinaldo et al. in 1997, based mainly on trees constructed using 18S ribosomal RNA genes. However, the group is also strongly supported by morphological characters, and can be considered as including all animals that shed their exoskeleton (see ecdysis). Groups corresponding roughly to the Ecdysozoa had been proposed previously by Perrier in 1897 and Seurat in 1920 based on morphology alone. ...more on Wikipedia about "Ecdysozoa"
The echinoderms (Echinodermata) are a phylum of marine animals found in the ocean at all depths. This phylum appeared in the lower Cambrian period and represents about 7,000 living species and 13,000 extinct ones. Five or six classes (six counting Concentricycloidea) are extant in the Cenozoic (the modern geological era). These are: ...more on Wikipedia about "Echinoderm"
The Echiura, or spoon worms, are a small group of marine animals. They are often considered to be a group of annelids, although they lack the segmented structure found in other members of that group, and so may also be treated as a separate phylum. The Echiura fossilise poorly and the earliest known specimen is from the Pennsylvanian (called the Upper Carboniferous outside North America). However, U-shaped fossil burrows that could be Echiuran have been found dating back to the Cambrian. ...more on Wikipedia about "Echiura"
The Ectoprocta are a phylum of lophophorate animals. Formerly these animals made up one division of the Bryozoa, the other being the Entoprocta, which they superficially resemble. However, the Entoprocta are no longer thought to be closely related to the Ectoprocta, and are generally considered a phylum of their own. This leaves Ectoprocta as the only subgroup of Bryozoa: some researchers treat the two names as synonyms; others use Ectoprocta only. ...more on Wikipedia about "Ectoprocta"
Eltanin Antenna is the name popularly given to an unusual sponge photographed on the sea floor by the Antarctic oceanographic research ship USNS Eltanin in 1964. ...more on Wikipedia about "Eltanin Antenna"
Entoprocta (Gr. entos inside + proktos anus) is a phylum of small aquatic animals, ranging in size from 0.5 mm to 5.0 mm. They have a lophophore, and as their name suggests, are distinguished from other lophophorates by the position of the anus inside the ring of cilia rather than outside. Other names include goblet worm and kamptozoan. ...more on Wikipedia about "Entoprocta"
(Eutardigrade) Eutardigrada are a class of Tardigrada without lateral appendices. Primarily freshwater bound, some species have secondarily gained the ability to live in marine environments (Halobiotus). By cryptobiosis many species are able to live temporarilly in very dry environments. ...more on Wikipedia about "Eutardigrade"
The flatworms (Platyhelminthes, Greek "platy"': flat; "helminth": worm) are a phylum of relatively simple soft-bodied invertebrate animals. With about 7,000 described species they are the largest phylum of acoelomates. Flatworms are found in marine, freshwater, and even damp terrestrial environments. Most are free-living forms, but many are parasitic on other animals. There are four classes: Trematoda (Flukes), Cestoda (Tapeworms), Monogenea, and Turbellaria. ...more on Wikipedia about "Flatworm"
A forest dweller is an animal whose primary habitat is within a forest, or a small gathering of trees. ...more on Wikipedia about "Forest dweller"
The gastrotrichs (from Greek gaster "stomach" and thrix "hair") are a phylum of microscopic animals, found in fresh water and marine environments. They are bilaterally symmetric, with a complete gut. The body is covered with cilia, especially about the mouth, and has two terminal projections that serve as adhesive tubes. Like many microscopic animals, their locomotion is primarily powered by hydrostatics, and they reproduce entirely by parthenogenesis. Originally they were thought to have a pseudocoel, but this was an artifact created by preservation methods, and they are now known to be acoelomate. Genetic studies place them as close relatives of the flatworms. About 450 species are known. Its average life span is very short - about three days. ...more on Wikipedia about "Gastrotrich"
A generalist is an animal which consumes a variety of food sources and is usually able to adapt to more than one ecological niche. A specialist animal, by contrast, generally favours a single food source and terrain type. Omnivores, which eat both plants and meat, are generalists by definition, but herbivores which eat a variety of plants are also considered generalists. A well-known example of a specialist animal is the koala bear which subsists almost entirely on eucalyptus leaves. ...more on Wikipedia about "Generalist and specialist animals" Come again to www.shortopedia.com
The geoduck (pronounced "GOO-wee-duck"), Panopea abrupta or Panope generosa, is a species of large saltwater clam, also known as the king clam or elephant trunk clam. ...more on Wikipedia about "Geoduck"
Gnathostomulids, or jaw worms, are a small phylum of nearly microscopic marine animals. Mostly between 0.5 and 1 mm long. Like flatworms they have a ciliated epidermis, but are unique in having but one cilium per cell (Ruppert, Fox & Barnes 2004). Having a bilaterally symmetrical pharynx with complex cuticular mouth parts, they appear closely related to rotifers and their allies, together making up the Gnathifera. Gnathostomulids have no fossil record. ...more on Wikipedia about "Gnathostomulid"
Hallopora is an extinct genus of bryozoans. ...more on Wikipedia about "Hallopora"
Hemichordata is a phylum of worm-shaped marine deuterostome animals, generally considered the sister group of our own, the chordates. They date back to the Lower or Middle Cambrian and include an important class of fossils called graptolites, most of which became extinct in the Carboniferous. They seem to have a primtive form of a chordata, but this is most likely the result of parallell evolution. A hollow neural tube among some species (at least in early life), a probably a primitive trait they share with the common ancestor of chordata and the rest of the deuterostomes. ...more on Wikipedia about "Hemichordata"
Heteronemertea is a monophyletic grouping of about 500 species, containing genera such as Lineus and Cerebratulus and including the largest and most muscular nemerteans. Almost all heteronemerteans have three primary body-wall muscle strata: an outer longitudinal, a middle circular, and an inner longitudinal. The lateral nerve cords are outside the circular muscle, as in palaeonemerteans, but separated from the epidermis by the usually well-developed outer longitudinal muscle. ...more on Wikipedia about "Heteronemertea"
(Heterotardigrada)
Order Arthrotardigrada
...more on Wikipedia about "Heterotardigrada"
Invertebrate is a term coined by Jean-Baptiste Lamarck to describe any animal without a spinal column. It therefore includes all animals except vertebrates ( fish, reptiles, amphibians, birds and mammals). ...more on Wikipedia about "Invertebrate"
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Kinorhyncha (Gr. kinema motion + rhyncho snout) is a phylum of small (1 mm or less) marine pseudocoelomate invertebrates that are widespread in mud or sand at all depths as part of the meiobenthos. They are sometimes called mud dragons. ...more on Wikipedia about "Kinorhyncha"
Limnognathia maerski is a microscopic animal, discovered living in homothermic springs on Disko Island, Greenland in 2000, that was given its own phylum, Micrognathozoa. It is related to the rotifers and gnathostomulids, grouped together as the Gnathifera. With 32 moving parts, the jaw of this microscopic invertebrate not only exceeds sharks in complexity, but all other invertebrates. While feeding, limnognathia extend jaw parts from the mouth to grasp the substrate, like two small hands. ...more on Wikipedia about "Limnognathia"
The bootlace worm (Lineus longissimus) is in the phylum Nemertea or ribbon worms. It is one of the longest animals known, with specimens up to 30 m long being reported and some speculation that they may grow as long as 60 m, which would make the the longest animal in the world. The body is brown with lighter (longitudinal) stripes. It is the commonest nemertean found along the coasts of Britain. ...more on Wikipedia about "Lineus longissimus"
Lingulata is a class of brachiopod, among the oldest of all brachiopods having existed since the Cambrian period (550 mya). They are also among the most mophologically conservative of the brachiopods, having lasted from their earliest appearance to the present with very little change in shape. Shells of living specimens found today in the waters around Japan are almost identical to ancient Cambrian fossils. ...more on Wikipedia about "Lingulata"
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