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Microcotyle Pomacanthi
''Microcotyle pomacanthi'' is a species of monogenean, parasitic on the gills of a marine fish. It belongs to the family Microcotylidae.MacCallum, 1915. Notes on the genus ''Microcotyle'' III. Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere. 38, 71-7PDF Taxonomy ''Microcotyle pomacanthi'' was described and illustrated based on specimens recovered from the gills of fishes from different genera and belonging to distinct families, from the New York Aquarium, as ''Microcotyle pomocanthi''. In the original description, MacCallum stated that the specimens were so much alike and he hesitated to describe them as separate species. He considered that describing them under one name would point out the remarkable similarities. Dillon & Hargis redescribed and illustrated ''Microcotyle pomacanthi'' from the gills of the grass porgy ''Calamus arctifrons'' (Sparidae) off Florida, noted slight differences in the atrial spines and suggested that further ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can reproduction, produce Fertility, fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spine (zoology)
In a zoological context, spines are hard, needle-like anatomical structures found in both vertebrate and invertebrate species. The spines of most spiny mammals are modified hairs, with a spongy center covered in a thick, hard layer of keratin and a sharp, sometimes barbed tip. Occurrence Mammals Spines in mammals include the prickles of hedgehogs and among rodents, the quills of both New World and Old World porcupines as well as the prickly fur of spiny mice, spiny pocket mice and spiny rats. They are also found on afrotherian tenrecs, marsupial spiny bandicoots and on echidnas, of the monotremes. An ancient synapsid, ''Dimetrodon'', had extremely long spines on its backbone that were joined together with a web of skin that formed a sail-like structure. Many mammalian species, like cats and fossas, also have penile spines. The Mesozoic eutriconodont mammal '' Spinolestes'' already displayed spines similar to those of modern spiny mice. Fish Spines are found in the rays ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bodianus Rufus
The Spanish hogfish, ''Bodianus rufus'', is a species of wrasse native to the western Atlantic Ocean, where it can be found from North Carolina and Bermuda through the Caribbean and the Gulf of Mexico to southern Brazil. It inhabits coral or rock reefs at depths of . While the adults feed on such prey as molluscs ( snails, mussels, and squid), crustaceans ('' Mysis'' and brine shrimp), echinoderms ( brittle stars and sea urchins), worms, and small fish, the juveniles act as cleaner fishes. This species can reach a length of , though most do not exceed . This species is of minor importance to local commercial fisheries and can be found in the aquarium trade. When Marcus Elieser Bloch named the genus '' Bodianus'' he used ''Bodianus bodianus'' as the type species of the genus, this is a junior synonym of ''Bodianus rufus''. References External links * Spanish hogfish The Spanish hogfish, ''Bodianus rufus'', is a species of wrasse native to the wes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serranidae
The Serranidae are a large family of fishes belonging to the order Perciformes. The family contains about 450 species in 65 genera, including the sea basses and the groupers (subfamily Epinephelinae). Although many species are small, in some cases less than , the giant grouper (''Epinephelus lanceolatus'') is one of the largest bony fishes in the world, growing to in length and in weight. Representatives of this group live in tropical and subtropical seas worldwide. Characteristics Many serranid species are brightly colored, and many of the larger species are caught commercially for food. They are usually found over reefs, in tropical to subtropical waters along the coasts. Serranids are generally robust in form, with large mouths and small spines on the gill coverings. They typically have several rows of sharp teeth, usually with a pair of particularly large, canine-like teeth projecting from the lower jaw. All serranids are carnivorous. Although some species, especia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anisotremus Virginicus
''Anisotremus virginicus'', the porkfish, also known as the Atlantic porkfish sweetlips, dogfish or paragrate grunt, is a species of marine ray-finned fish, a Haemulidae, grunt belonging to the Family (biology), family Haemulidae. It is native to the western Atlantic Ocean. Description ''Anisotremus virginicus'' has a deep, compressed body with a very high back and a short, blunt head. The mouth is positioned low on the head, it is horizontal with fleshy lips and the jaws are equipped with bands of teeth on both jaws. The outer band of teeth are conical in shape. The flanks are marked with alternating yellow and silver stripes. There is a black bar running diagonally from over the eye to the upper lip and a second, vertical black bar runs from the front of the dorsal fin to the base of the pectoral fin. They have yellow fins, the caudal fin is deeply forked. The juveniles do not have the two black bars and have two black stripes which run horizontally along the middle of the flank ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetodon Capistratus
The foureye butterflyfish (''Chaetodon capistratus'') is a butterflyfish (family Chaetodontidae). It is alternatively called the four-eyed butterflyfish. This species is found in the Western Atlantic from Massachusetts, USA and Bermuda to the West Indies and northern South America. ''Chaetodon capistratus'' is the type species of ''Chaetodon''. If this genus is split up as some have proposed, it will retain its present name like its closest relatives, which include the banded butterflyfish (''C. striatus'') and the spot-finned butterflyfish (''C. ocellatus''). Description and ecology Foureye butterflyfish are deep-bodied and laterally compressed, with a single dorsal fin and a small mouth with tiny, bristle like teeth. The body is light grey, sometimes with a yellowish hue, and dark forward-pointing chevrons. The ventral fins are yellow. The species gets its common name from a large dark spot on the rear portion of each side of the body. This spot is surrounded by a brilliant w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetodon Ocellatus
The spotfin butterflyfish (''Chaetodon ocellatus'') is species of marine ray-finned fish, a butterflyfish from the family Chaetodontidae. It is found in the western Atlantic Ocean, in the Gulf of Mexico and most commonly found in the Caribbean Sea. The name is derived from the dark spot on the fish's dorsal fin. This, combined with a vertical, black bar through the eye, is an adaptation that can confuse predator Predation is a biological interaction where one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill ...s. The vertical black bar disappears as the fish gets older and other black lines become more prominent. Along with other Caribbean Seas reef dwelling tropical fish, many young spotfin butterfly fish get sucked up the gulf stream from July to late October and are dumped into Long Island bays. The spotfin butterfly fish is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pomacanthidae
Marine angelfish are perciform fish of the family Pomacanthidae. They are found on shallow reefs in the tropical Atlantic, Indian, and mostly western Pacific Oceans. The family contains seven genera and about 86 species. They should not be confused with the freshwater angelfish, tropical cichlids of the Amazon Basin. Description With their bright colours and deep, laterally compressed bodies, marine angelfishes are some of the more conspicuous residents of the reef. They most closely resemble the butterflyfishes, a related family of similarly showy reef fish. Marine angelfish are distinguished from butterflyfish by the presence of strong preopercle spines (part of the gill covers) in the former. This feature also explains the family name Pomacanthidae; from the Greek πομα, ''poma'' meaning "cover" and ακάνθα, ''akantha'' meaning "thorn". Many species of marine angelfishes have streamer-like extensions of the soft dorsal and anal fins. The fish have small mouths, r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haemulidae
Haemulidae is a family of fishes in the order Perciformes known commonly as grunts. It is made up of the two subfamilies Haemulinae (grunters) and Plectorhynchinae (sweetlips), which in turn contain about 133 species in 19 genera. These fish are found in tropical fresh, brackish, and salt waters around the world. They are bottom-feeding predators, and named for the ability of Haemulinae to produce sound by grinding their teeth. They also engage in mutualistic relationship with cleaner gobies of genus ''Elacatinus'', allowing them to feed on ectoparasites on their bodies. Timeline ImageSize = width:850px height:auto barincrement:15px PlotArea = left:10px bottom:50px top:10px right:10px Period = from:-65.5 till:10 TimeAxis = orientation:horizontal ScaleMajor = unit:year increment:5 start:-65.5 ScaleMinor = unit:year increment:1 start:-65.5 TimeAxis = orientation:hor AlignBars = justify Colors = #legends id:CAR value:claret id:ANK value:rgb(0.4,0.3,0. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Testicle
A testicle or testis (plural testes) is the male reproductive gland or gonad in all bilaterians, including humans. It is homologous to the female ovary. The functions of the testes are to produce both sperm and androgens, primarily testosterone. Testosterone release is controlled by the anterior pituitary luteinizing hormone, whereas sperm production is controlled both by the anterior pituitary follicle-stimulating hormone and gonadal testosterone. Structure Appearance Males have two testicles of similar size contained within the scrotum, which is an extension of the abdominal wall. Scrotal asymmetry, in which one testicle extends farther down into the scrotum than the other, is common. This is because of the differences in the vasculature's anatomy. For 85% of men, the right testis hangs lower than the left one. Measurement and volume The volume of the testicle can be estimated by palpating it and comparing it to ellipsoids of known sizes. Another method is to use calip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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