|
Arachnanthus
''Arachnanthus'' is a genus of tube-dwelling anemones in the family Arachnactidae. Members of the genus are found worldwide. Characteristics ''Arachnanthus'' species live in parchment-like tubes which are buried in muddy or sandy sediment. Some species are nocturnal. Species The following species are currently included in the genus according to the World Register of Marine Species:Molodtsova, T. (2018)''Arachnanthus'' Carlgren, 1912.Accessed through: World Register of Marine Species on 2018-09-18 * ''Arachnanthus australiae'' Carlgren, 1937 * ''Arachnanthus bockii'' Carlgren, 1924 * ''Arachnanthus lilith'' Stampar & El Didi, 2018 * ''Arachnanthus oligopodus'' (Cerfontaine, 1891) * ''Arachnanthus sarsi'' Carlgren, 1912 ''Arachnanthus nocturnus ''Arachnanthus'' is a genus of tube-dwelling anemones in the family Arachnactidae. Members of the genus are found worldwide. Characteristics ''Arachnanthus'' species live in parchment-like tubes which are buried in muddy or sandy sedi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arachnanthus Australiae
''Arachnanthus'' is a genus of tube-dwelling anemones in the family Arachnactidae. Members of the genus are found worldwide. Characteristics ''Arachnanthus'' species live in parchment-like tubes which are buried in muddy or sandy sediment. Some species are nocturnal. Species The following species are currently included in the genus according to the World Register of Marine Species:Molodtsova, T. (2018)''Arachnanthus'' Carlgren, 1912.Accessed through: World Register of Marine Species on 2018-09-18 * '' Arachnanthus australiae'' Carlgren, 1937 * '' Arachnanthus bockii'' Carlgren, 1924 * '' Arachnanthus lilith'' Stampar & El Didi, 2018 * ''Arachnanthus oligopodus'' (Cerfontaine, 1891) * ''Arachnanthus sarsi ''Arachnanthus sarsi'' is a species of tube-dwelling anemone in the family Arachnactidae. This species is found in the North Atlantic in subtidal sand or muddy sand at depths of 15–130 m. Description This is a large sea anemone, with a ...'' Carlgren, 1912 '' Ara ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arachnanthus Sarsi
''Arachnanthus sarsi'' is a species of tube-dwelling anemone in the family Arachnactidae. This species is found in the North Atlantic in subtidal sand or muddy sand at depths of 15–130 m. Description This is a large sea anemone, with a diameter of up to when fully expanded and a height of a similar amount. There are two whorls of tentacles, the outer ring of about thirty are long and slender, while the inner ring, consisting of a similar number, are short and are extended upward, turning inward at the tip to form a cone; it is this feature which distinguishes this species from the otherwise similar ''Cerianthus lloydii''. The tentacles are indistinctly banded. It lives in soft sand, muddy sand, mud or gravel, with its column concealed in a parchment-like tube. Distribution This species was described from Trondheim Fjord, Norway. It occurs in the north-east Atlantic Ocean off Scotland and Ireland.Picton, B.E.; Manuel, R.L. 1985. Arachnanthus sarsi'' Carlgren, 1912, a red ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arachnactidae
Arachnactidae is a family of tube-dwelling anemones in the order Ceriantharia. It is the only family in the monotypic order Penicillaria and comprises around 38 species. They differ from other ceriantharians in the makeup of their cnidome (the types of cnidocyte present), the relative sizes of the oral discs and the shape and structure of the mesenteries. These tube anemones dwell in parchment-like tubes immersed in soft sediment, and have two whorls of tentacles, the outer ones being much longer than the inner ones. Genera The World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific speciali ... includes the following genera in the family :Molodtsova, T. (2015)Arachnactidae McMurrich, 1910.Accessed through: World Register of Marine Species on 2016-02-10 * '' Anactin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tube-dwelling Anemone
Tube-dwelling anemones or ceriantharians look very similar to sea anemones but belong to an entirely different class of anthozoans. They are solitary, living buried in soft sediments. Tube anemones live inside and can withdraw into tubes, which are composed of a fibrous material made from secreted mucus and threads of nematocyst-like organelles known as ptychocysts. Within the tubes of these ceriantharians, more than one polyp is present, which is an exceptional trait because species that create tube systems usually contain only one polyp per tube. Ceriantharians were formerly classified in the taxon Ceriantipatharia along with the black corals but have since been moved to their own subclass, Ceriantharia. Ceriantharians have a crown of tentacles that are composed of two whorls of distinctly different sized tentacles. The outer whorl consists of large tentacles that extend outwards. These tentacles taper to points and are mostly used in food capture and defence. The smaller in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. '' Panthera leo'' (lion) and '' Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') 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". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nocturnal
Nocturnality is an ethology, animal behavior characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnality, diurnal meaning the opposite. Nocturnal creatures generally have highly developed senses of hearing (sense), hearing, olfaction, smell, and specially adapted eyesight. Some animals, such as cats and ferrets, have eyes that can adapt to both low-level and bright day levels of illumination (see metaturnal). Others, such as bushbaby, bushbabies and (some) bats, can function only at night. Many nocturnal creatures including tarsiers and some owls have large eyes in comparison with their body size to compensate for the lower light levels at night. More specifically, they have been found to have a larger cornea relative to their eye size than diurnal creatures to increase their : in the low-light conditions. Nocturnality helps wasps, such as ''Apoica flavissima'', avoid hunting in intense sunlight. Diurnality ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
