|
Parapercis Maculata
''Parapercis maculata'', the harlequin sandperch, is a species of marine ray-finned fish in the family Pinguipedidae, found in shallow waters in the tropical western Indo-Pacific Ocean. Description The harlequin sandperch grows to a maximum length of . It is cylindrical at the front but somewhat compressed at the back. The head is large with an oblique mouth and the eyes set near the top. There is a spine on the operculum. The dorsal fin has five spines and twenty-one (occasionally twenty-two) soft rays. The fourth spine is the longest. The anal fin has a single spine and eighteen or nineteen soft rays. The general colour is pale reddish or greyish brown, shading to white on the underparts. There are large irregular reddish-brown blotches on the back, with six distinctive reddish-brown, squarish blotches below the lateral line. The dorsal fin has rows of small orange spots on the soft rays, and the anal fin has rows of white spots. The caudal fin is slightly rounded, the second t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ray-finned Fish
Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of skin supported by radially extended thin bony spines called '' lepidotrichia'', as opposed to the bulkier, fleshy lobed fins of the sister clade Sarcopterygii (lobe-finned fish). Resembling folding fans, the actinopterygian fins can easily change shape and wetted area, providing superior thrust-to-weight ratios per movement compared to sarcopterygian and chondrichthyian fins. The fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the articulation between these fins and the internal skeleton (e.g., pelvic and pectoral girdles). The vast majority of actinopterygians are teleosts. By species count, they dominate the subphylum Vertebrata, and constitute nearly 99% of the over 30,000 extant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family (, : ) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". The delineation of what constitutes a family—or whether a described family should be acknowledged—is established and decided upon by active taxonomists. There are not strict regulations for outlining or acknowledging a family, yet in the realm of plants, these classifications often rely on both the vegetative and reproductive characteristics of plant species. Taxonomists frequently hold varying perspectives on these descriptions, leading to a lack of widespread consensus within the scientific community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinguipedidae
The sandperches are a family, Pinguipedidae, of ray-finned fishes in the Percomorpha, percomorph Order (biology), order Labriformes. Sandperches are benthic fish which normally occur over sand or rubble Substrate (biology), substrates in shallow seas. They are found off the coasts of South America, South Africa and in the Indo-Pacific as far east as Japan. The family contains a few species which are used by humans for food. Characteristics Some sandperches resemble wrasse in that they possess long dorsal fin, dorsal and anal fins which may have a few spines and enlarged lips that appear to curl back with big canine teeth in the front of the jaws. They have elongated bodies which are flattened posteriorly and cylindrical towards the head. The body usually patterned with spots and bands, The eyes are positioned near top of head. They are relatively small in size, normally in length. These fish tend to sit on the sea bed, their bodies propped up by the widely separated pelvic fins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operculum (fish)
The operculum is a series of bones found in bony fish and chimaeras that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding. Anatomy The opercular series contains four bone segments known as the preoperculum, suboperculum, interoperculum and operculum. The preoperculum is a crescent-shaped structure that has a series of ridges directed posterodorsally to the organism’s canal pores. The preoperculum can be located through an exposed condyle that is present immediately under its ventral margin; it also borders the operculum, suboperculum, and interoperculum posteriorly. The suboperculum is rectangular in shape in most bony fish and is located ventral to the preoperculum and operculum components. It is the thinnest bone segment out of the opercular series and is located directly above the gills. The interoperculum is triangular shaped and borders the suboperculum posterodorsally and the preoperculum anterodo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lateral Line
The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelial cells, known as hair cells, which respond to displacement caused by motion and transduce these signals into electrical impulses via excitatory synapses. Lateral lines play an important role in schooling behavior, predation, and orientation. Early in the evolution of fish, some of the sensory organs of the lateral line were modified to function as the electroreceptors called ampullae of Lorenzini. The lateral line system is ancient and basal to the vertebrate clade, as it is found in fishes that diverged over 400 million years ago. Function The lateral line system allows the detection of movement, vibration, and pressure gradients in the water surrounding an animal. It plays an essential role in orientation, predation, and fish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morphology (biology)
Morphology (from Ancient Greek μορφή (morphḗ) "form", and λόγος (lógos) "word, study, research") is the study of the form and structure of organisms and their specific structural features. This includes aspects of the outward appearance (shape, structure, color, pattern, size), as well as the form and structure of internal parts like bones and organs, i.e., anatomy. This is in contrast to physiology, which deals primarily with function. Morphology is a branch of life science dealing with the study of the overall structure of an organism or taxon and its component parts. History The etymology of the word "morphology" is from the Ancient Greek (), meaning "form", and (), meaning "word, study, research". While the concept of form in biology, opposed to function, dates back to Aristotle (see Aristotle's biology), the field of morphology was developed by Johann Wolfgang von Goethe (1790) and independently by the German anatomist and physiologist Karl Fried ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parapercis Pulchella
''Parapercis pulchella'', the harlequin sandsmelt, is a ray-finned fish species in the sandperch family, Pinguipedidae. It is found in the north-western Pacific Ocean, including the shores of Japan, Taiwan and Hong Kong. Description ''Parapercis pulchella'' reaches a total length Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured f ... of . References *Randall, J.E., 2008. Six new sandperches of the genus Parapercis from the Western Pacific, with description of a neotype for P. maculata (bloch and Schneider). The Raffles Bull. Zool. 19:159-178. pulchella Taxa named by Coenraad Jacob Temminck Taxa named by Hermann Schlegel Fish described in 1843 {{Pinguipedidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sequential Hermaphroditism
Sequential hermaphroditism (called dichogamy in botany) is one of the two types of hermaphroditism, the other type being simultaneous hermaphroditism. It occurs when the organism's sex changes at some point in its life. A sequential hermaphrodite produces eggs (female gametes) and sperm (male gametes) at different stages in life. Sequential hermaphroditism occurs in many fish, gastropods, and plants. Species that can undergo these changes do so as a normal event within their reproductive cycle, usually cued by either social structure or the achievement of a certain age or size. In animals, the different types of change are male to female (protandry or protandrous hermaphroditism), female to male (protogyny or protogynous hermaphroditism), and bidirectional (serial or bidirectional hermaphroditism). Both protogynous and protandrous hermaphroditism allow the organism to switch between functional male and functional female. Bidirectional hermaphrodites have the capacity for sex chan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parapercis
''Parapercis'' is a genus of sandperches belonging to the family Pinguipedidae The sandperches are a family, Pinguipedidae, of ray-finned fishes in the Percomorpha, percomorph Order (biology), order Labriformes. Sandperches are benthic fish which normally occur over sand or rubble Substrate (biology), substrates in shallow .... Species There are currently 79 recognized species in this genus: * '' Parapercis albipinna'' J. E. Randall, 2008 * '' Parapercis albiventer'' H.-C. Ho, Heemstra & Imamura, 2014 (Whitebelly sandperch) * '' Parapercis alboguttata'' ( Günther, 1872) (Whitespot sandsmelt) * '' Parapercis allporti'' Günther, 1876 (Barred grubfish) * '' Parapercis atlantica'' ( Vaillant, 1887) * '' Parapercis aurantiaca'' Döderlein ( de), 1884 * '' Parapercis australis'' J. E. Randall, 2003 * '' Parapercis banoni'' J. E. Randall & Yamakawa, 2006 * '' Parapercis basimaculata'' J. E. Randall, Senou & Yoshino, 2008 * '' Parapercis bicoloripes'' Prokofi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Georges Cuvier
In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion, especially in the context of rank-based (" Linnaean") nomenclature (much less so under phylogenetic nomenclature). If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated folk taxonomies. Much later, Aristotle, and later still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
