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Stenorhynchus Seticornis
''Stenorhynchus seticornis'', the yellowline arrow crab or simply arrow crab, is a species of marine crab. Description The body of ''S. seticornis'' is triangular, and the rostrum is drawn out into a long point with serrate edges. The legs are also long and thin, up to across, and the animal's carapace may be up to long. Colouration is variable in this species; the body may be golden, yellow or cream, marked with brown, black or iridescent-blue lines; the legs are reddish or yellow, and the claws are blue or violet. This species presents as diagnostic features: triangular body with long pointed snout (rostrum), carapace decorated with fine dark lines and claws often have violet tips. ''S. seticornis'' is most commonly associated with anemones, in groups ranging from one to six individuals in south-eastern Brazil. Distribution ''Stenorhynchus seticornis'' is commonly found in the shallow sub-tidal on rock bottoms, corals, calcareous algae, and also on soft sediments, such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenorhynchus Seticornis (Yellowline Arrow Crab)
''Stenorhynchus seticornis'', the yellowline arrow crab or simply arrow crab, is a species of marine crab. Taxonomy ''Stenorhynchus seticornis'' was first described by Johann Friedrich Wilhelm Herbst in 1788, under the name ''Cancer seticornis''. It was also described as "''Cancer sagittarius''" by Johan Christian Fabricius in 1793, a name which is now a junior synonym of ''S. seticornis''. Pierre André Latreille erected the genus ''Stenorhynchus'' (originally mis-spelt ''Stenorynchus'') in 1818, and ''S. seticornis'' was confirmed as the type species by the International Commission on Zoological Nomenclature in 1966. Description The body of ''S. seticornis'' is triangular, and the rostrum is drawn out into a long point with serrate edges. The legs are also long and thin, up to across, and the animal's carapace may be up to long. Colouration is variable in this species; the body may be golden, yellow or cream, marked with brown, black or iridescent-blue lines; t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Friedrich Wilhelm Herbst
Johann Friedrich Wilhelm Herbst (1 November 1743 – 5 November 1807) was a German naturalist and entomologist from Petershagen, Minden-Ravensberg. He served as a chaplain in the Prussian army. His marriage in Berlin, 1770, with Euphrosyne Luise Sophie (1742–1805), daughter of the Prussian ''Hofrat'' Libert Waldschmidt seems to have been childless. He was the joint editor, with , of ''Naturgeschichte der in- und ausländischen Insekten'' (1785–1806, 10 volumes), which was one of the first attempts at a complete survey of the order [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal Diversity Web
Animal Diversity Web (ADW) is an online database that collects the natural history, classification, species characteristics, conservation biology, and distribution information on thousands of species of animals. The website includes thousands of photographs, hundreds of sound clips, and a virtual museum. Overview The ADW acts as an online encyclopedia, with each individual species account displaying basic information specific to that species. The website used a local, relational database written by staff and student contributors from the University of Michigan. Each species account includes geographic range, habitat, physical description, development, ecosystem roles, reproduction, life span, communication and perception, behavior, food habits, predation, and conservation status. The organization of the site reinforces past biology knowledge by providing sharp images and showing common phyla on the home page. The Animal Diversity Web has resources other than its databa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spermatophore
A spermatophore or sperm ampulla is a capsule or mass containing spermatozoa created by males of various animal species, especially salamanders and arthropods, and transferred in entirety to the female's ovipore during reproduction. Spermatophores may additionally contain nourishment for the female, in which case it is called a nuptial gift, as in the instance of bush crickets. In the case of the toxic moth ''Utetheisa ornatrix'', the spermatophore includes sperm, nutrients, and pyrrolizidine alkaloids which prevent predation because it is poisonous to most organisms. However, in some species such as the Edith's checkerspot butterfly, the "gift" provides little nutrient value. The weight of the spermatophore transferred at mating has little effect on female reproductive output. Arthropods Spermatophores are the norm in arachnids and several soil arthropods. In various insects, such as bush crickets, the spermatophore is often surrounded by a proteinaceous spermatophylax. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mating
In biology, mating is the pairing of either opposite-sex or hermaphroditic organisms for the purposes of sexual reproduction. ''Fertilization'' is the fusion of two gametes. ''Copulation'' is the union of the sex organs of two sexually reproducing animals for insemination and subsequent internal fertilization. Mating may also lead to external fertilization, as seen in amphibians, fishes and plants. For most species, mating is between two individuals of opposite sexes. However, for some hermaphroditic species, copulation is not required because the parent organism is capable of self-fertilization (autogamy); for example, banana slugs. The term ''mating'' is also applied to related processes in bacteria, archaea and viruses. Mating in these cases involves the pairing of individuals, accompanied by the pairing of their homologous chromosomes and then exchange of genomic information leading to formation of recombinant progeny (see mating systems). Animals For animals, mating ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulletin Of Marine Science
The ''Bulletin of Marine Science'' is a peer-reviewed scientific journal published by the Rosenstiel School of Marine and Atmospheric Science of the University of Miami. The journal was established in 1951 as the ''Bulletin of Marine Science of the Gulf and Caribbean'' and obtained its current name in 1965. All content is available electronically, and for issues older than three years, free of charge. Scope The ''Bulletin of Marine Science'' covers marine biology, ecology, biological oceanography, fisheries management, marine policy, marine geology, marine geophysics, marine chemistry, atmospheric chemistry, meteorology Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting. The study of meteorology dates back millennia, though significant progress in meteorology did no ..., and physical oceanography. References External links * {{Official website, http://bullmarsci.o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Periclimenes Yucatanicus
The spotted cleaner shrimp (''Periclimenes yucatanicus''), is a kind of cleaner shrimp common to the Caribbean Sea. These shrimp live among the tentacles of several species of sea anemones. They sway their body and wave their antennae in order to attract fish from which they eat dead tissue, algae and parasites. Description The spotted cleaner shrimp grows to a length of about . It has a transparent body patterned with brown and white saddle shaped markings. The chelae and legs are boldly striped in red, purple and white. There are two pairs of long white antennae banded in black. Distribution The spotted cleaner shrimp is found at depths down to about in the Caribbean Sea, southern Florida, the Bahamas and as far south as Colombia. Life cycle Breeding takes place in the summer and females have been seen brooding eggs under their abdomens in the months of July and August. After hatching, the larvae pass through several planktonic larval stages before settling on the seabed and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancylomenes Pedersoni
''Ancylomenes pedersoni'', sometimes known as Pederson's shrimp and Pederson's cleaner shrimp, is a species of cleaner shrimp. It is part of the genus ''Ancylomenes'' and was described in 1958 by Fenner A. Chace Jr. as ''Periclimenes pedersoni''. ''Ancylomenes pedersoni'' is found in the Caribbean Sea, often associated with a sea anemone, at depths of . They are often found on the reefs off Bermuda. Description Pederson's shrimp is a small transparent shrimp with bluish and violet markings on the body and long white antennae and within its range is unlikely to be confused with other species. Ecology Pederson's shrimp lives in association with a sea anemone, either ''Bartholomea annulata'' or ''Condylactis gigantea'', living among the tentacles with impunity. Before it can do this it needs to acclimatise itself to the anemone by progressively pressing its body and appendages against the tentacles for increasing periods of time. After this it is able to move between the tentacles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lebrunia Danae
''Lebrunia neglecta'' is a species of sea anemone in the family Aliciidae. It is found in the Caribbean Sea and Gulf of Mexico. Description ''Lebrunia neglecta'' is an unusual sea anemone in that its tentacles are almost hidden by the ring of six much branching large frond-like pseudotentacles that grow up from the rim of the oral disc. These are some shade of pale or darker brown and have densely branched tips. Below these, on the side of the frond are small, whitish spherical vesicles containing nematocysts that are powerful enough to sting a human. After contact with a prey item, the pseudotentacles retract and the tentacles, which are also armed with nematocysts, grasp the prey and draw it into the mouth. The column of the anemone is usually invisible, being anchored in a crevice. This species can grow to a diameter of . It is very similar in appearance to the closely related '' Lebrunia coralligens'', but the pseudotentacles of that species are much less branched, and often ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Anemone
Sea anemones are a group of predation, predatory marine invertebrates of the order (biology), order Actiniaria. Because of their colourful appearance, they are named after the ''Anemone'', a terrestrial flowering plant. Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia. As cnidarians, sea anemones are related to corals, jellyfish, tube-dwelling anemones, and ''hydra (genus), Hydra''. Unlike jellyfish, sea anemones do not have a Jellyfish#Life history and behavior, medusa stage in their life cycle. A typical sea anemone is a single polyp (zoology), polyp attached to a hard surface by its base, but some species live in soft sediment, and a few float near the surface of the water. The polyp has a columnar trunk topped by an oral disc with a ring of tentacles and a central mouth. The tentacles can be retracted inside the body cavity or expanded to catch passing prey. They are armed with cnidocytes (stinging cells). In many species, additional n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bristle Worm
Polychaeta () is a paraphyletic class of generally marine annelid worms, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. More than 10,000 species are described in this class. Common representatives include the lugworm (''Arenicola marina'') and the sandworm or clam worm ''Alitta''. Polychaetes as a class are robust and widespread, with species that live in the coldest ocean temperatures of the abyssal plain, to forms which tolerate the extremely high temperatures near hydrothermal vents. Polychaetes occur throughout the Earth's oceans at all depths, from forms that live as plankton near the surface, to a 2- to 3-cm specimen (still unclassified) observed by the robot ocean probe ''Nereus'' at the bottom of the Challenger Deep, the deepest known spot in the Earth's oceans. Only 168 species (less than 2% of all polychaetes) are known from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Invertebrate
Invertebrates are a paraphyletic group of animals that neither possess nor develop a vertebral column (commonly known as a ''backbone'' or ''spine''), derived from the notochord. This is a grouping including all animals apart from the chordate subphylum Vertebrata. Familiar examples of invertebrates include arthropods, mollusks, annelids, echinoderms and cnidarians. The majority of animal species are invertebrates; one estimate puts the figure at 97%. Many invertebrate taxa have a greater number and variety of species than the entire subphylum of Vertebrata. Invertebrates vary widely in size, from 50 μm (0.002 in) rotifers to the 9–10 m (30–33 ft) colossal squid. Some so-called invertebrates, such as the Tunicata and Cephalochordata, are more closely related to vertebrates than to other invertebrates. This makes the invertebrates paraphyletic, so the term has little meaning in taxonomy. Etymology The word "invertebrate" comes from the Latin word ''vertebra'', whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
