| 词条 | Semisulcospira kurodai |
| 释义 |
| name = Semisulcospira kurodai | image = Semisulcospira kurodai2.jpg | image_caption = A live individual of Semisulcospira kurodai viewed through the glass of an aquarium | status = | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia = clade Caenogastropoda clade Sorbeoconcha | superfamilia = Cerithioidea | familia = Semisulcospiridae | genus = Semisulcospira | species = S. kurodai | binomial = Semisulcospira kurodai | binomial_authority = Kajiyama & Habe, 1961[1] | synonyms = }} Semisulcospira kurodai is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Semisulcospiridae. Prior to 2009, this species was classified in the family Pleuroceridae. DistributionThis species occurs in Japan. DescriptionThe maximum width of the shell of Semisulcospira kurodai is {{convert|13.3|mm|in}}[2] and {{convert|52.0|mm|in}} in height in the laboratory.[2] The maximum weight of the animal is {{convert|7.7|g|oz}} in the laboratory.[2] The width of the shell is {{convert|10.3|mm|in}} in the first year, {{convert|11.0|mm|in}} in the second year, {{convert|11.5|to|11.8|mm|in}} in the third year and {{convert|12.0|mm|in}} in the fourth year in the laboratory.[2] The diploid chromosome number of Semisulcospira kurodai is 2n=35 and 2n=36 (both chromosome numbers were observed).[2] EcologyHabitatSemisulcospira kurodai lives in rivers and in ponds.[7]Life cycleThe female has 17 to 72 embryos in its brood pouch.[3] One female can give life to 62 to 79 newborn snails in the laboratory.[4] The average size of the shell of a newborn snail varies according to the locality from {{convert|1.2|to|1.4|mm|in}} in width and from {{convert|1.9|to|2.1|mm|in}} in height of the shell.[3] Semisulcospira kurodai can live up to four years in the laboratory.[4]References1. ^{{jp icon}} Kajiyama H. & Habe T. (1961). "Two new forms of the Japanese melanians; Semisulcospira". Venus 21(2): 167-176. page 173. fig. 1-3. 2. ^Davis G. M. (1969). "A taxonomic study of some species of Semisulcospira in Japan (Mesogastropoda: Pleuroceridae)". Malacologia 7: [https://archive.org/stream/malacologia76869inst#page/210/mode/2up 211]-294. 3. ^1 2 {{jp icon}} Takami A. (1997). "クロダカワニナの分布と成貝および新生貝の種内変異 [Distribution and Intraspecific Variation in Adult and Newborn Shells of Semisulcospira kurodai (Prosobranchia: Pleuroceridae)]". Venus 56(4): 305-317. CiNii. 4. ^1 2 3 4 5 {{jp icon}} Takami A. (1995). "室内飼育におけるクロダカワニナの成長と産仔数 [Growth and Number of Newborns in Semisulcospira kurodai (Prosobranchia: Pleuroceridae) Reared in the Laboratory]". Venus 54(2): 123-132. CiNii. Further reading
External links{{Taxonbar|from=Q7449669}} 1 : Semisulcospiridae |
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