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| The shell contains 3 to 3½ ]s. These are marked by deep sutures and constricted by regularly spaced annulations, with approximately 16 annulations present on the ]. The peripheral area is smooth, giving the shell an ]-like appearance. The ] is circular, with a continuous peristome. <ref>{{cite journal |last1=Habe |first1=T. |title=The Japan's smallest gastropod, Ammonicera japonica, sp. nov. |journal=Venus |date=1972 |volume=31 |issue=3 |pages=15-116 |url=https://www.jstage.jst.go.jp/article/venusjjm/31/3/31_KJ00004341439/_article/-char/en |access-date=21 January 2025}} {{source-attribution-CC BY 4.0}}</ref> | The shell contains 3 to 3½ ]s. These are marked by deep sutures and constricted by regularly spaced annulations, with approximately 16 annulations present on the ]. The peripheral area is smooth, giving the shell an ]-like appearance. The ] is circular, with a continuous peristome. <ref>{{cite journal |last1=Habe |first1=T. |title=The Japan's smallest gastropod, Ammonicera japonica, sp. nov. |journal=Venus |date=1972 |volume=31 |issue=3 |pages=15-116 |url=https://www.jstage.jst.go.jp/article/venusjjm/31/3/31_KJ00004341439/_article/-char/en |access-date=21 January 2025}} {{source-attribution-CC BY 4.0}}</ref> | ||
| It forms a homogeneous group with '']'' and '']'', based don the presence of one strong groove on the ] and at least one axial sculpture on the ]. <ref> {{cite journal |last1=Sartori, A.F. & Bieler, R. |title=Three new species of Ammonicera from the Eastern Pacific coast of North America, with redescriptions and comments on other species of Omalogyridae (Gastropoda, Heterobranchia). |journal=Zootaxa |date=2014 |volume=38 |issue=72 (1) |pages=8-10 |url=https://doi.org/10.11646/zootaxa.3872.1.1 |access-date=21 January 2025}}</ref> | It forms a homogeneous group with '']'' and '']'', based don the presence of one strong groove on the ] and at least one axial sculpture on the ]. <ref name="Sartori"> {{cite journal |last1=Sartori, A.F. & Bieler, R. |title=Three new species of Ammonicera from the Eastern Pacific coast of North America, with redescriptions and comments on other species of Omalogyridae (Gastropoda, Heterobranchia). |journal=Zootaxa |date=2014 |volume=38 |issue=72 (1) |pages=8-10 |url=https://doi.org/10.11646/zootaxa.3872.1.1 |access-date=21 January 2025}}</ref> | ||
| ==Distribution== | ==Distribution== | ||
| This species occurs off ] and ]; also in the Indian Ocean off ]; in the Pacific off ]; off ] and off the ]. <ref |
This species occurs off ] and ]; also in the Indian Ocean off ]; in the Pacific off ]; off ] and off the ]. <ref name="Sartori" /> | ||
| ==References== | ==References== | ||
Latest revision as of 14:35, 21 January 2025
Species of gastropod
| Ammonicera japonica | |
|---|---|
| |
| Shell of Ammonicera japonica (holotype) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Family: | Omalogyridae |
| Genus: | Ammonicera |
| Species: | A. japonica |
| Binomial name | |
| Ammonicera japonica Habe, 1972 | |
Ammonicera japonica is a species of minute sea snail, a marine gastropod mollusc in the family Omalogyridae.
Description
The major diameter of the shell is O.68 mm and minor diameter O.5 mm.
(Original description) The thin, yet solidly constructed shell is extremely small, measuring less than 1 mm in diameter when fully grown. Fresh specimens are dark brown, while dead shells are ashy white. The shell features 16 regularly arranged white radial streaks along the periphery and is planorboid and biconcave, resembling the freshwater pulmonate snail Gyraulus.
The shell contains 3 to 3½ whorls. These are marked by deep sutures and constricted by regularly spaced annulations, with approximately 16 annulations present on the body whorl. The peripheral area is smooth, giving the shell an ammonite-like appearance. The aperture is circular, with a continuous peristome.
It forms a homogeneous group with Ammonicera nodicarinata and Ammonicera vangoethemi, based don the presence of one strong groove on the protoconch and at least one axial sculpture on the teleoconch.
Distribution
This species occurs off Japan and Korea; also in the Indian Ocean off Réunion; in the Pacific off Hawaii; off Papua New Guinea and off the United Arab Emirates.
References
- Ammonicera japonica Habe, 1972. 21 January 2025. Retrieved through: World Register of Marine Species.
- Habe, T. (1972). "The Japan's smallest gastropod, Ammonicera japonica, sp. nov". Venus. 31 (3): 15–116. Retrieved 21 January 2025.
This article incorporates text from this source, which is under a CC BY 4.0 license.
- ^ Sartori, A.F. & Bieler, R. (2014). "Three new species of Ammonicera from the Eastern Pacific coast of North America, with redescriptions and comments on other species of Omalogyridae (Gastropoda, Heterobranchia)". Zootaxa. 38 (72 (1)): 8–10. Retrieved 21 January 2025.
{{cite journal}}: CS1 maint: multiple names: authors list (link)
- Raines, B.K. (2007). "New molluscan records from Easter Island, with the description of a new Ethminolia". Visaya. 2 (1): 70–88.
| Taxon identifiers | |
|---|---|
| Ammonicera japonica | |