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Elytron (Annelida)
In annelids, elytra (; from Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ... ἔλυτρον "sheath, cover"; singular: elytron ) are shield-like scales that are attached dorsally, one pair on each of a number of alternating segments and entirely or partly cover the dorsum. Elytra are modified dorsal cirri, and their number, size, location, and ornamentation are important taxonomic characters. The basal part of the elytra is known as the elytrophore; if (as is often the case) elytra are lost their presence is indicated by the elytrophore which is still present and visible. Annelids possessing elytra are also known as "scale worms". Possession of elytra is characteristic of the annelid suborder Aphroditiformia. Gallery File:Eunoe leiotentaculata lower res.jpg, A '' Eunoe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Augenerilepidonotus Dictyolepis Elytron MVF64510
''Augenerilepidonotus dictyolepis'' is a species of marine annelids in the family Polynoidae (scale worms) and the sole member of the genus ''Augenerilepidonotus''. It is known from Australia, usually from depths of about 40 metres or less. Description Body dorsoventrally flattened, short, with 26 segments and 12 pairs of elytron (Annelida), elytra on segments 2, 4, 5, 7, 9, 11, 13, 15, 17, 19, 21, and 2. Prostomium with three Antenna (biology), antennae; lateral antennae continuous with prostomium, laterally to median antenna. elytron (Annelida), elytra covered with chitinous irregular polygonal areas. Chaeta, Notochaetae slender and densely serrated. Chaeta, Neurochaetae much more stout, with few rows of spines distally and exclusively unidentate tips (see Pettibone, 1995 for detailed diagnosis) . ''Augenerilepidonotus dictyolepis'' is very similar to species of Lepidonotus, differing only by the polygonal ornamentation of the elytra. Gallery References {{Taxo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annelid
The annelids (Annelida , from Latin ', "little ring"), also known as the segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches. The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in moist terrestrial environments. The Annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms. They also have parapodia for locomotion. Most textbooks still use the traditional division into polychaetes (almost all marine), oligochaetes (which include earthworms) and leech-like species. Cladistic research since 1997 has radically changed this scheme, viewing leeches as a sub-group of oligochaetes and oligochaetes as a sub-group of polychaetes. In addition, the Pogonophora, Echiura and Sipuncula, previously regarded as separate phyla, are now regarded as sub-groups of polycha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancient Greek
Ancient Greek includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Dark Ages (), the Archaic period (), and the Classical period (). Ancient Greek was the language of Homer and of fifth-century Athenian historians, playwrights, and philosophers. It has contributed many words to English vocabulary and has been a standard subject of study in educational institutions of the Western world since the Renaissance. This article primarily contains information about the Epic and Classical periods of the language. From the Hellenistic period (), Ancient Greek was followed by Koine Greek, which is regarded as a separate historical stage, although its earliest form closely resembles Attic Greek and its latest form approaches Medieval Greek. There were several regional dialects of Ancient Greek, of which Attic Greek developed into Koine. Dia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirrus (biology)
In biology, a cirrus , plural ''cirri'', , (from the Latin ''cirrus'' meaning a ''curl-like tuft or fringe'') is a long, thin structure in an animal similar to a tentacle but generally lacking the tentacle's strength, flexibility, thickness, and sensitivity. In the sheep liver fluke, for example, the ''cirrus'' is the worm's muscular penis and when not in use is retained within a ''cirrus sac'' or ''pouch'' near the animal's head. The same structure exists in the various ''Taenia'' species of tapeworm. In the clam worms, however, the cirrus is the tentacular process or growth on each of the feet (''parpodia''), either the ''dorsal cirrus'' or the ''ventral cirrus'', and has nothing to do with reproduction. Among the bristleworms, a cirrus is a tentacular growth near the head or notopodium containing sense organs and may be either dorsal, ventral, or lamellar. Among the ribbonworms, the ''caudal cirrus'' is a small thread-like growth at the posterior end of the worm. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eunoe Leiotentaculata
''Eunoe leiotentaculata'' is a Polynoidae, scale worm known from southern Australia and New Zealand and the South Pacific Ocean at depths of 500-1200 m. Species recognition Within the geographic range of ''Eunoe leiotentaculata'', at least 100 other species of Polynoidae also occur, but only about 3 other species share these features: 41-55 segments, a pair of distinct “peaks” on the prostomium, 15 pairs of elytron (Annelida), elytra which have smooth margins lacking papillae, and all the ventral chaetae taper to a simple point. The taxonomic description below, and original sources, will be required to distinguish ''Eunoe leiotentaculata'' from the most similar species. Distribution This species was originally collected in 1976 on a Russian voyage through the Tasman Sea and is now known to occur at depths of 500–1300 m around the coast of southern Australia and New Zealand. Description ''Eunoe leiotentaculata'' is a short-bodied worm with 45–55 segments and 15 pairs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euphione
''Euphione'' is a genus of polychaetes belonging to the family Polynoidae. The species of this genus are found in Australia, Malesia Malesia is a biogeographical region straddling the Equator and the boundaries of the Indomalayan and Australasian realms, and also a phytogeographical floristic region in the Paleotropical Kingdom. It has been given different definitions. The ... and Southern Africa. Species: *'' Euphione branchifera'' *'' Euphione chitoniformis'' *'' Euphione elisabethae'' *'' Euphione ornata'' *'' Euphione squamosa'' *'' Euphione suluensis'' References {{Taxonbar, from=Q3919321 Annelids ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annelid Anatomy
The annelids (Annelida , from Latin ', "little ring"), also known as the segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches. The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in moist terrestrial environments. The Annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms. They also have parapodia for locomotion. Most textbooks still use the traditional division into polychaetes (almost all marine), oligochaetes (which include earthworms) and leech-like species. Cladistic research since 1997 has radically changed this scheme, viewing leeches as a sub-group of oligochaetes and oligochaetes as a sub-group of polychaetes. In addition, the Pogonophora, Echiura and Sipuncula, previously regarded as separate phyla, are now regarded as sub-groups of polychaetes. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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