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Polyeunoa Maculata
''Polyeunoa maculata'' is a scale worm which is only known from Ratnagiri, IndiaDay JH (1973) Polychaeta collected by U.D. Gaikwad at Ratnagiri, south of Bombay. Journal of the Linnean Society of London, Zoology 52: 337–361. https://doi.org/10.1111/j.1096–3642.1973.tb01888.x Description ''Polyeunoa maculata'' has 53 segments, with 24 pairs of elytra. The dorsum is covered with three broken dark bands per segment, with a dark streak on top of the cirrophores, the base of which are pink. The lateral antennae inserted ventrally (beneath prostomium and median antenna). The notochaetae are thinner than the neurochaetae, with bidentate neurochaetae absent. Biology and ecology ''Polyeunoa maculata'' is commensal with another species of marine annelid, '' Mesochaetopterus japonicus''; it was first found inside the tube constructed by ''M. japonicus''. References {{Taxonbar, from=Q2079259 Phyllodocida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polynoidae
Polynoidae is a family of marine Polychaete worms known as "scale worms" due to the scale-like elytra on the dorsal surface. Almost 900 species are currently recognised belonging to 9 subfamilies and 167 genera. They are active hunters, but generally dwell in protected environments such as under stones. The group is widely distributed from shallow intertidal waters to hadal trenches. They are the most diverse group of polychaetes in terms of genus number and second most diverse in terms of species number which is almost 8% of all segmented worm species. Description Most Polynoidae species are short and flattened, but can reach as much as 20 cm in length and 10 cm width in '' Eulagisca gigantea'' and '' Eulagisca uschakovi''. Individuals are usually covered almost entirely by elytra, which can be shed and regenerated in many species. The elytra of some species are faintly bioluminescent, and leave glowing traces around the mouthparts of their predators, making those pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ratnagiri
Ratnagiri ( IAST:Ratnāgirī ; �ət̪n̪aːɡiɾiː is a port city on the Arabian Sea coast in Ratnagiri District in the southwestern part of Maharashtra, India. The district is a part of Konkan division of Maharashtra. The city is known for the Hapus or Alphonso mangoes. Ratnagiri is the birthplace of Indian independence activist Lokmanya Tilak. Thibaw, the last king of Burma, alongside his consort Supayalat and two infant daughters were exiled to a two-storied brick mansion in Ratnagiri. The building is now known as Thibaw Palace. Geography Ratnagiri is located at . It has an average elevation of 11 meters (36 feet). The Sahyadri mountains border Ratnagiri to the east Climate Transport Road Ratnagiri is well connected to the other parts of the state and country by National Highways & State Highways. National Highways NH 66 ( Panvel – Edapally ), NH 166 ( Ratnagiri – Nagpur ) and Coastal Highway ( Rewas – Reddy ) pass through the city. MSRTC o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prostomium
The prostomium (From Ancient Greek, meaning "before the mouth"; plural: prostomia; sometimes also called the "acron") is the cephalized first body segment in an annelid worm's body at the anterior end. It is in front of (but does not include) the mouth, being usually a small shelf- or lip-like extension over the dorsal side of the mouth. The prostomium together with the peristomium, which includes the mouth and pharynx, make up the annelid head. Description The prostomium is part of the head and holds at least part of the brain and often bears sensory structures such as the eyes, antennae and palps. It may function like a kind of overlip when the animal is feeding. The prostomium bears many important taxonomic characters and its shape and composition are important for annelid systematics. In addition to the eyes, antennae and palps, the prostomium can possess appendages such as tentacles or cirri. Moreover, some polychaete Polychaeta () is a paraphyletic class of gener ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaeta
A chaeta or cheta (from Greek χαίτη “crest, mane, flowing hair"; plural: chaetae) is a chitinous bristle or seta found in annelid worms, (although the term is also frequently used to describe similar structures in other invertebrates such as arthropods). Polychaete annelids, ('polychaeta' literally meaning "many bristles") are named for their chaetae. In Polychaeta, chaetae are found as bundles on the parapodia, paired appendages on the side of the body. The chaetae are epidermal extracellular structures, and clearly visible in most polychaetes. They are probably the best studied structures in these animals. Use in taxonomy and identification The ultrastructure of chaetae is fundamentally similar for all taxa but there is vast diversity in chaetal morphology. Moreover, chaetae bear precise characters for determination of species and taxonomic assessment. The shape, absolute and relative size, number, position, ornamentation and type are important taxonomic characters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commensal
Commensalism is a long-term biological interaction ( symbiosis) in which members of one species gain benefits while those of the other species neither benefit nor are harmed. This is in contrast with mutualism, in which both organisms benefit from each other; amensalism, where one is harmed while the other is unaffected; parasitism, where one is harmed and the other benefits, and parasitoidism, which is similar to parasitism but the parasitoid has a free-living state and instead of just harming its host, it eventually ends up killing it. The commensal (the species that benefits from the association) may obtain nutrients, shelter, support, or locomotion from the host species, which is substantially unaffected. The commensal relation is often between a larger host and a smaller commensal; the host organism is unmodified, whereas the commensal species may show great structural adaptation consistent with its habits, as in the remoras that ride attached to sharks and other fish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
