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Acochlidiacea
Acochlidiacea, common name acochlidians, are a Taxonomy (biology), taxonomic clade of very unusual sea snails and sea and freshwater slugs, aquatic animal, aquatic gastropod mollusks within the large clade Heterobranchia. Acochlidia is a variant spelling. Description These are mostly very small animals, without a Mollusc shell, shell or gills, distinguished by the visceral mass being sharply set off from the rest of the body. Being a small group with only 47 species worldwide known in 2023,MolluscaBase eds. (2021)MolluscaBase. Acochlidiimorpha.Accessed on 2023-02-13. this group has been the subject of active research since 2010, by which date only 32 species were named. These slugs are morphologically and biologically highly aberrant and diverse, comprising a series of unusual characters (e.g. secondary gonochorism, lack of copulatory organs, asymmetric radulae). Most acochlidians live interstitially in marine sands, while some have conquered limnic systems (uniquely within o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hedylopsacea
Acochlidiacea, common name acochlidians, are a taxonomic clade of very unusual sea snails and sea and freshwater slugs, aquatic gastropod mollusks within the large clade Heterobranchia. Acochlidia is a variant spelling. Description These are mostly very small animals, without a shell or gills, distinguished by the visceral mass being sharply set off from the rest of the body. Being a small group with only 47 species worldwide known in 2023,MolluscaBase eds. (2021)MolluscaBase. Acochlidiimorpha.Accessed on 2023-02-13. this group has been the subject of active research since 2010, by which date only 32 species were named. These slugs are morphologically and biologically highly aberrant and diverse, comprising a series of unusual characters (e.g. secondary gonochorism, lack of copulatory organs, asymmetric radulae). Most acochlidians live interstitially in marine sands, while some have conquered limnic systems (uniquely within opisthobranch gastropods). Taxonomy Nils Hjalmar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acochlidiidae
Acochlidiidae are a taxonomic family of shell-less freshwater gastropods (one of them '' Palliohedyle weberi'' lives in brackish water),Schrödl M. & Neusser T. P. (2010). "Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)". ''Zoological Journal of the Linnean Society'' 158: 124-154. . aquatic gastropod mollusks within the clade Acochlidiacea. 2005 taxonomy Acochlidiidae was classified as the only family within the superfamily Acochlidioidea Küthe, 1935 in the taxonomy of Bouchet & Rocroi (2005). Palliohedylidae was in turn classified as the only family within the superfamily Palliohedyloidea. 2010 taxonomy Schrödl & Neusser (2010) redefined the taxonomy of Acochlidiacea in 2010, placing the family Acochlidiidae in the clade Hedylopsacea Acochlidiacea, common name acochlidians, are a taxonomic clade of very unusual sea snails and sea and freshwater slugs, aquatic gastropod mollusks within the large clade Heterobranchia. Acochli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asperspinidae
''Asperspina'' is a genus of sea slugs, marine gastropod mollusks within the clade Acochlidiacea. Taxonomy Asperspinidae has been listed as a synonym of Parhedylidae in the taxonomy of Bouchet & Rocroi (2005). Sensu Schrödl & Neusser (2010)Schrödl M. & Neusser T. P. (2010). "Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)". ''Zoological Journal of the Linnean Society The ''Zoological Journal of the Linnean Society'' is a monthly peer-reviewed scientific journal covering zoology published by Oxford University Press on behalf of the Linnean Society. The editor-in-chief is Maarten Christenhusz (Linnean Society) ...'' 158: 124-154. . is ''Asperspina'' is the only genus in the family Asperspinidae. Minicheviellidae is a junior synonym of Asperspinidae. Species Species within the genus ''Asperspina'' include: * '' Asperspina brambelli'' (Swedmark, 1968) * '' Asperspina murmanica'' (Kudinskaya & Minichev, 1978) - synonym: ''Minicheviel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hedylopsis Suecica
Hedylopsis is a genus of sea slugs, marine gastropod mollusks within the clade Acochlidiacea. Taxonomy Hedylopsidae has been classified within the superfamily Hedylopsoidea in the taxonomy of Bouchet & Rocroi (2005). Sensu Schrödl & Neusser (2010)Schrödl M. & Neusser T. P. (2010). "Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)". ''Zoological Journal of the Linnean Society'' 158: 124-154. . ''Hedylopsis'' is the only genus in the family Hedylopsidae. It is placed within unranked clade Hedylopsacea Acochlidiacea, common name acochlidians, are a taxonomic clade of very unusual sea snails and sea and freshwater slugs, aquatic gastropod mollusks within the large clade Heterobranchia. Acochlidia is a variant spelling. Description These a .... Species There are only two species in the genus ''Hedylopsis'': * '' Hedylopsis spiculifera'' (Kowalevsky, 1901) * '' Hedylopsis ballantinei'' Sommerfeldt & Schrödl, 2005 References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudunelidae
''Pseudunela'' is a genus of minute sea slugs, acochlidians, shell-less marine or temporary brackish or brackish gastropod mollusks in the clade Acochlidiacea. ''Pseudunela'' is the only genus in the family Pseudunelidae. ''Pseudunela'' is the type genus of the family Pseudunelidae. Taxonomy Pseudunelidae was placed within the superfamily Strubellioidea in the taxonomy of Bouchet & Rocroi (2005). Pseudunelidae was subsequently placed within the (unranked) Hedylopsacea by Schrödl & Neusser (2010).Schrödl M. & Neusser T. P. (2010). "Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)". ''Zoological Journal of the Linnean Society'' 158: 124-154. . Species These are the different species in the genus ''Pseudunela'': * ''Pseudunela cornuta'' (Challis, 1970) - type species of the genus ''Pseudunela'', marine and temporary brackish * '' Pseudunela eirene'' Wawra, 1988 - The description of ''Pseudunela eirene'' is brief and based on a single ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pontohedyle Milaschewitchii
''Pontohedyle milaschewitchii'' is a species of sea slug, an acochlidian, a shell-less marine gastropod mollusk in the family Parhedylidae.Jörger K. M., Norenburg J. L., Wilson N. G. & Schrödl M. (2012). "Barcoding against a paradox? Combined molecular species delineations reveal multiple cryptic lineages in elusive meiofaunal sea slugs". ''BMC Evolutionary Biology ''BMC Ecology and Evolution'' (since January 2021), previously ''BMC Evolutionary Biology'' (2001–2020), is a peer-reviewed open access scientific journal covering all fields of evolutionary biology, including phylogenetics and palaeontology ...'' 12: 245. . Ecology The life cycle of all Acochlidiacea is not well known. ''Pontohedyle milaschewitchii'' lays a maximum of 40 eggs. References External links * Jörger K. M., Neusser T. P. & Schrödl M. (2007). "Re-description of a female ''Pontohedyle brasilensis'' (Rankin, 1979), a junior synonym of the Mediterranean ''P. milaschewitchii'' (Kowalevsky, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hedylopsidae
Hedylopsis is a genus of sea slugs, marine gastropod mollusks within the clade Acochlidiacea. Taxonomy Hedylopsidae has been classified within the superfamily Hedylopsoidea in the taxonomy of Bouchet & Rocroi (2005). Sensu Schrödl & Neusser (2010)Schrödl M. & Neusser T. P. (2010). "Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)". ''Zoological Journal of the Linnean Society'' 158: 124-154. . ''Hedylopsis'' is the only genus in the family Hedylopsidae. It is placed within unranked clade Hedylopsacea Acochlidiacea, common name acochlidians, are a taxonomic clade of very unusual sea snails and sea and freshwater slugs, aquatic gastropod mollusks within the large clade Heterobranchia. Acochlidia is a variant spelling. Description These a .... Species There are only two species in the genus ''Hedylopsis'': * '' Hedylopsis spiculifera'' (Kowalevsky, 1901) * '' Hedylopsis ballantinei'' Sommerfeldt & Schrödl, 2005 References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tantulidae
''Tantulum elegans'' is a species of freshwater slug, an aquatic shell-less gastropod mollusk within the clade Acochlidiacea. This species has no shell. The maximum recorded length is 2 mm.Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". '' PLoS ONE'' 5(1): e8776. . ''Tantulum elegans'' is the only species in the genus ''Tantulum'', and that is in turn the only genus in the family Tantulidae.Strong E. E., Gargominy O., Ponder W. F. & Bouchet P. (2008). "Global Diversity of Gastropods (Gastropoda; Mollusca) in Freshwater". '' Hydrobiologia'' 595: 149-166. . Taxonomy In 2005, Tantulidae was classified as the only family within the superfamily Hedylopsoidea in the taxonomy of Bouchet & Rocroi. According to Schrödl & Neusser (2010)Schrödl M. & Neusser T. P. (2010). "Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)". ''Zoological Journal of the Linnean Society'' 158: 124-154. . Tantulidae i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudunela Cornuta Svg Hariadhi
''Pseudunela'' is a genus of minute sea slugs, acochlidians, shell-less marine or temporary brackish or brackish gastropod mollusks in the clade Acochlidiacea. ''Pseudunela'' is the only genus in the family Pseudunelidae. ''Pseudunela'' is the type genus of the family Pseudunelidae. Taxonomy Pseudunelidae was placed within the superfamily Strubellioidea in the taxonomy of Bouchet & Rocroi (2005). Pseudunelidae was subsequently placed within the (unranked) Hedylopsacea by Schrödl & Neusser (2010).Schrödl M. & Neusser T. P. (2010). "Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)". ''Zoological Journal of the Linnean Society'' 158: 124-154. . Species These are the different species in the genus ''Pseudunela'': * ''Pseudunela cornuta'' (Challis, 1970) - type species of the genus ''Pseudunela'', marine and temporary brackish * '' Pseudunela eirene'' Wawra, 1988 - The description of ''Pseudunela eirene'' is brief and based on a single ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Snail
Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible Gastropod shell, shell. Definition Determining whether some gastropods should be called sea snails is not always easy. Some species that live in brackish water (such as certain Neritidae, neritids) can be listed as either freshwater snails or marine snails, and some species that live at or just above the high tide level (for example, species in the genus ''Truncatella (gastropod), Truncatella'') are sometimes considered to be sea snails and sometimes listed as land snails. Anatomy Sea snails are a very large and diverse group of animals. Most snails that live in salt water respire using a gill or gills; a few species, though, have a lung, are intertidal, and are active only at low tide w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acochlidium Fijiiensis
''Acochlidium fijiiensis'' is a species of freshwater slug, an aquatic gastropod mollusc within the family Acochlidiidae. This species lives in two rivers on Fiji.Rudman W. B. (23 March 2010). "''Acochlidium fijiiensis'' Haynes & Kenchington, 1991". ''Sea Slug Forum''. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/acocfiji accessed 23 may 2010. References Further reading * Haase M. & Wawra E. (1996). "The genital system of ''Acochlidium fijiense'' (Opisthobranchia: Acochlidioidea) and its inferred function". ''Malacologia ''Malacologia'' is a peer-reviewed scientific journal in the field of malacology, the study of mollusks. The journal publishes articles in the fields of molluscan systematics, ecology, population ecology, genetics, molecular genetics, evolution, an ...'' 38: 143-151. * External links * https://web.archive.org/web/20110727113118/http://www.naturefiji.org/endspecies.php?info=Acochlidium%20fijiense Acochlidiidae Gastropod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
