Contents
| Chaceon | |
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| Chaceon affinis | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Subphylum: | |
| Class: | |
| Order: | |
| Infraorder: | |
| Family: | |
| Genus: | Chaceon |
| Species | |
See text | |
Chaceon is a crab genus in the family Geryonidae.
| Chaceon | |
|---|---|
| | |
| Chaceon affinis | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Subphylum: | |
| Class: | |
| Order: | |
| Infraorder: | |
| Family: | |
| Genus: | Chaceon |
| Species | |
See text | |
Chaceon is a crab genus in the family Geryonidae.
Xanthidae is a family of crabs known as gorilla crabs, mud crabs, pebble crabs or rubble crabs. Xanthid crabs are often brightly coloured and are highly poisonous, containing toxins which are not destroyed by cooking and for which no antidote is known. The toxins are similar to the tetrodotoxin and saxitoxin produced by puffer fish, and may be produced by bacteria in the genus Vibrio living in symbiosis with the crabs, mostly V. alginolyticus and V. parahaemolyticus.
Caridina is a genus of freshwater atyid shrimp. They are widely found in tropical or subtropical water in Asia, Oceania and Africa. They are filter-feeders and omnivorous scavengers. They range from 0.9–9.8 mm to 1.2–7.4 mm in carapace length.
Atyidae is a family of shrimp, present in all tropical and most temperate waters of the world. Adults of this family are almost always confined to fresh water. This is the only family in the superfamily Atyoidea.
Portunidae is a family of crabs which contains the swimming crabs.
Metanephrops is a genus of lobsters, commonly known as scampi. Important species for fishery include Metanephrops australiensis and Metanephrops challengeri. It differs from other lobsters such as Homarus and Nephrops norvegicus in that its two main claws are of equal size, rather than being differentiated into a crusher and a pincher. There are 18 extant species recognised in the genus:
Potamidae is a family of freshwater crabs. It includes more than 650 species and nearly 100 genera, which are placed into two subfamilies: Potaminae and Potamiscinae.
Chaceon fenneri, commonly known as the golden crab or golden deepsea crab, is one of several species of crab harvested for food by humans. It was formerly called Geryon fenneri. Like the blue crab, its common name comes from the color of its shell; it is usually cream to tan in color. Both parts of the binomen Chaceon fenneri commemorate Fenner A. Chace, Jr. It is found on the ocean floor at depths of 200 to 1,500 m (660–4,920 ft) in the tropical west Atlantic, ranging from the Gulf of Mexico to Brazil. It cannot swim. The carapace of this large crab measures up to 20 cm (7.9 in), making the entire animal similar in size to a dinner plate. Its diet includes benthic (bottom-dwelling) organisms like mollusks and worms.
Hexapodidae is a family of crabs, the only family in the superfamily Hexapodoidea. It has traditionally been treated as a subfamily of the family Goneplacidae, and was originally described as a subfamily of Pinnotheridae. Its members can be distinguished from all other true crabs by the reduction of the thorax, such that only seven sternites are exposed, and only four pairs of pereiopods are present. Not counting the enlarged pair of claws, this leaves only six walking legs, from which the type genus Hexapus, and therefore the whole family, takes its name. Some anomuran "crabs", such as porcelain crabs and king crabs also have only four visible pairs of legs. With the exception of Stevea williamsi, from Mexico, all the extant members are found either in the Indo-Pacific oceans, or around the coast of Africa.
Pseudozioidea is a superfamily of crabs, formerly treated in the Eriphioidea, Carpilioidea, Xanthoidea, Pilumnoidea and Goneplacoidea. A number of fossils from the Eocene onwards are known from the family Pseudoziidae. Eleven genera are recognised in three families:
Raymond Brendan Manning was an American carcinologist, specialising in alpha taxonomy and mantis shrimp.
Fenner Albert Chace Jr. was an American carcinologist. He was born in Fall River, Massachusetts, and studied at Harvard University, before becoming a curator at that university's Museum of Comparative Zoology. In his own words, he "served as a civilian oceanographer and commissioned officer in the Army Air Corps (subsequently transferred to the Oceanographic Unit of the U.S. Navy Hydrographic Office in Suitland, Md" during the Second World War, and afterwards, he succeeded Waldo L. Schmitt at the United States National Museum. He worked at the National Museum until his retirement in 1978, and then he continued as Zoologist Emeritus. He was "one of the most influential carcinologists of the 20th century", and named 200 taxa in the Decapoda and Stomatopoda, most of them shrimp.
Macrobrachium is a genus of freshwater prawns or shrimps characterised by the extreme enlargement of the second pair of pereiopods, at least in the male.
Nephropsis is a genus of lobsters containing 15 extant species:
Geryonidae is a family of crabs, including the following genera and species:
Geryon trispinosus is a species of crab that lives in deep water in the north-eastern Atlantic Ocean.
Chaceon crosnieri is a species of crab. Chaceon crosnieri differs from C. affinis in that the carapace is more inflated, the outer orbital and the suborbital teeth are stronger, the subdistal tooth on the merus of the cheliped is stronger and the cheliped is smoother dorsally; the carpus of the walking legs lacks dorsal spinules, and the merus of the walking legs has a strong distal dorsal spine. It differs from C. chuni in being much larger up to 155 millimetres (6.1 in), the carapace is more inflated, the gap between the first and second anterolateral tooth of the carapace is larger; the frontal teeth of the carapace are stronger, the suborbital spine is smaller, and the carpus of the cheliped lacks an outer spine. Chaceon crosnieri is a smoother species than C. bicolor, with shorter and stouter legs, the suborbital spine is lower and blunter, and the distal projection on the merus of the walking legs is much less developed in larger specimens. This species is named after Alain Crosnier.
Chaceon bicolor is a species of crab. Chaceon bicolor differs from all species of the genus in color pattern, with the anterior part of the body purplish rather than reddish. In addition to color pattern, C. bicolor also differs from C. granulatus in having compressed rather than depressed dactyli on the walking legs; also, the hepatic region of the carapace in C. granulatus is coarsely granular, whereas it is smooth in C. bicolor. Juvenile specimens differ from adults in many features: the teeth of the carapace are much larger and sharper, there is a sharp spine on the carpus of the cheliped and a distal spine on the merus of each walking leg, plus the legs are longer and slenderer. Adult females differ from males in having much sharper anterolateral teeth on the carapace, sharper suborbital spines, and much shorter legs, with less trace of a distal dorsal projection on the merus. The carapace of females is more strongly arched from front to back and the protogastric regions are noticeably more inflated. The species is named as such because of its colour patter, purple an tan.
Chaceon atopus is a species of crab. This species resembles C. gordonae, from the Cape Verde Islands and Sierra Leone, in many features: its large size, well-developed frontal and
The Camptandriidae are a family of crabs, with 38 species in 21 genera:
Periclimenes, commonly known as glass shrimp or cleaner shrimp, is a commensal and often symbiotic genus of semi-transparent shrimp within the family Palaemonidae. Species of this large genus feature a wide variety of coloration and patterns, widespread distribution throughout much of the world's tropical oceans, and are often sought out for aquarium trade.
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