| Halicreas | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Cnidaria |
| Class: | Hydrozoa |
| Order: | Trachymedusae |
| Family: | Halicreatidae |
| Genus: | Halicreas Fewkes, 1882 |
| Species: | H. minimum |
| Binomial name | |
| Halicreas minimum Fewkes, 1882 | |
| Synonyms | |
| |
Halicreas minimum is a species of deep sea hydrozoan of the family Halicreatidae. [1] It is the only species in the monotypic genus Halicreas.
Umbrella 30–40 mm wide, thick, disk-like, with small apical projection; 8 clusters of gelatinous papillae above margin, mouth wide circular opening; 8 broad, band-like, radial canals; broad circular canal; gonads flattened, extending along almost entire length of radial canals; tentacles up to 640; 3-4 statocysts in each octant.
The Grand Union Canal in England is part of the British canal system. It is the principal navigable waterway between London and the Midlands. Starting in London, one arm runs to Leicester and another ends in Birmingham, with the latter stretching for 137 miles (220 km) with 166 locks from London. The Birmingham line has a number of short branches to places including Slough, Aylesbury, Wendover, and Northampton. The Leicester line has two short arms of its own, to Market Harborough and Welford.
The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The system is composed of canals connecting numerous tube feet. Echinoderms move by alternately contracting muscles that force water into the tube feet, causing them to extend and push against the ground, then relaxing to allow the feet to retract.
The toyger is a breed of domestic cat, the result of breeding domestic shorthaired tabbies to make them resemble a "toy tiger", as its striped coat is reminiscent of the tiger's. The breed's creator, Judy Sugden, has stated that the breed was developed in order to inspire people to care about the conservation of tigers in the wild. It was recognized for "registration only" by The International Cat Association in the early 2000s, and advanced through all requirements to be accepted as a full championship breed in 2012. There are about 20 breeders in the United States and another 15 or so in the rest of the world, as of 2012.
The first metacarpal bone or the metacarpal bone of the thumb is the first bone proximal to the thumb. It is connected to the trapezium of the carpus at the first carpometacarpal joint and to the proximal thumb phalanx at the first metacarpophalangeal joint.
The spongehead catshark is a rare species of deep-sea catshark, family Scyliorhinidae. This species was only known from two specimens taken in the Pacific Ocean: an adult from near Bird Island, Hawaii, and a juvenile from the Banda Sea off Sulawesi. They are found on or near the bottoms of insular continental slopes, at depths of 570 to 1,480 meters. In 2002, the spongehead catshark was seen alive in its natural habitat for the first time, from the submersible Pisces IV at a depth of about a kilometer, on the Northampton Seamount off the northwestern Hawaiian Islands.
Trilobozoa is a phylum of extinct, sessile animals that were originally classified into the Cnidaria. The basic body plan of trilobozoans is often a tri-radial or radial sphere-shaped form with lobes radiating from its centre. Fossils of trilobozoans are restricted to marine strata of the Late Ediacaran period.
Actinoceras is the principal and root genus of the Actinoceratidae, a major family in the Actinocerida, that lived during the Middle and Late Ordovician. It is an extinct genus of nautiloid cephalopod that thrived in the warm waters of the United States and England during the Paleozoic era.
Ormoceras is an actinocerid nautiloid genus and type for the family Ormoceratidae, found in North America from the late Chazyan through the early Cincinnatian of the Middle and Upper Ordovician, but which continued through the Devonian worldwide.
Leptothecata, or thecate hydroids, are an order of hydrozoans in the phylum Cnidaria. Their closest living relatives are the athecate hydroids, which are similar enough to have always been considered closely related, and the very apomorphic Siphonophorae, which were placed outside the "Hydroida". Given that there are no firm rules for synonymy for high-ranked taxa, alternative names like Leptomedusa, Thecaphora or Thecata, with or without the ending emended to "-ae", are also often used for Leptothecata.
The Asterozoa are a subphylum in the phylum Echinodermata. Characteristics include a star-shaped body and radially divergent axes of symmetry. The subphylum includes the class Asteroidea, the class Ophiuroidea, and the extinct order Somasteroidea.
Inquisitor formidabilis is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.
Veprecula vepratica is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Eldoniids or eldonioids are an extinct clade of enigmatic disc-shaped animals which lived in the early to middle Paleozoic. They are characterized by their "medusoid" (jellyfish-shaped) bodies, with the form of a shallow dome opening below to an offset mouth supplemented by filamentous tentacles. Internally, they have a distinctive C-shaped cavity encompassing the gut, as well as hollow radial (radiating) structures arranged around a central ring canal. Most eldoniids are soft-bodied and can only be preserved in lagerstätten, but a few species may have hosted mineralized deposits. Historically, the affinities of eldoniids was enigmatic; recently, they been assessed as cambroernid deuterostomes. Their lifestyle is still an unresolved question; some authors reconstruct eldoniids as free-floating planktonic predators similar to jellyfish, while others argue that they were passive detritivores, embedded within the seabed for much of their life.
Amanita nehuta, also called Maori dust amanita, is a species of fungus in the family Amanitaceae. It was first described by New Zealand mycologist Geoff Ridley in 1991. It occurs in New Zealand in large number. It has only a dark ring rather than a universal veil and white spores. It is found under leptospermum and Nothofagus. It grows on ground usually in late summer. Its height is 110 mm and width is 100 mm.
Ferocactus latispinus is a species of barrel cactus native to Mexico. Originally described as Cactus latispinus in 1824 by English naturalist Adrian Hardy Haworth, it gained its current name in 1922 with the erection of the genus Ferocactus by American botanists Britton and Rose. The species name is derived from the Latin latus "broad", and spinus "spine". Ferocactus recurvus is a former name for the species.
Catostylidae is a family of jellyfish. Members of this family are characterized by their thick, sausage-like oral arms.
Pandeidae is a family of hydroids in the class Hydrozoa. Like other jellyfish there is usually a mature medusa form which is pelagic and reproduces sexually and a hydroid or polyp form which is often benthic and reproduces asexually by budding.
Vallentinia gabriellae, the hitch-hiking jellyfish, is a species of small, inconspicuous hydrozoan in the family Olindiidae. It is endemic to a few isolated parts of the western Atlantic Ocean. It is elusive in the wild but sometimes makes its appearance unexpectedly in seawater cultures of other organisms in the laboratory.
Liriope is a genus of hydrozoan in the family Geryoniidae. It contains only one species, Liriope tetraphylla.
Amanita spreta or the hated amanita is an inedible species of the genus Amanita.
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