<documentid="DCE49C69B95D0746ABCCEF540343BE99"ID-CLB-Dataset="39813"ID-DOI="10.11646/zootaxa.3990.2.2"ID-GBIF-Dataset="1740ec81-c55e-44ce-9a6d-cd62acd5d898"ID-ISSN="1175-5326"ID-Zenodo-Dep="242947"ID-ZooBank="BDF1BC11-4848-4858-99DC-0336A5FBEE2B"IM.materialsCitations_approvedBy="felipe"IM.metadata_approvedBy="felipe"IM.tables_requiresApprovalFor="existingObjects,plazi"IM.taxonomicNames_approvedBy="felipe"checkinTime="1461267666231"checkinUser="plazi"docAuthor="Helwerda, Renate A."docDate="2015"docId="03FA878C951CFE44FF26E6D8027ECAE5"docLanguage="en"docName="zt03990p220.pdf"docOrigin="Zootaxa 3990 (2)"docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article"docStyleId="647186512141C8FC8976D5BCC54AEB7D"docStyleName="Zootaxa.2013-.journal_article"docStyleVersion="9"docTitle="Ringicula bella"docType="treatment"docVersion="11"lastPageNumber="209"masterDocId="FFC3FFF49510FE4AFFB1E574036DCA1D"masterDocTitle="Acteonidae, Bullinidae and Ringiculidae (Gastropoda: Heterobranchia) from the Plio-Pleistocene of the Philippines"masterLastPageNumber="220"masterPageNumber="197"pageNumber="209"updateTime="1732492386731"updateUser="ExternalLinkService">
<mods:titleid="D890A0E64FD7900D954B891B4411E9DA">Acteonidae, Bullinidae and Ringiculidae (Gastropoda: Heterobranchia) from the Plio-Pleistocene of the Philippines</mods:title>
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961.798, Anda2 (22)
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961.799, Anda3 (14)
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961.800, Anda4 (50)
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961.801, AndaDeVos (2)
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961.803, AndaClif1 (1)
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961.804, Tiep2 (3)
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961.805, Tiep3 (5)
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961.822, Tiep4 (8)
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Shell rather high-spired, moderately large for its genus. Largest specimen has a total of 6.3 whorls, including a protoconch of 1.2 whorl. Protoconch rather small, smooth, weakly inclined. Teleoconch sculpted with thin, wavering spiral grooves and very weak, prosocyrt growth lines. Interspaces between spiral grooves decrease in width towards the base, whereas spiral grooves themselves increase in width towards the base. Spiral grooves intercalate along the whorls, increasing in number to 20–24 on the body whorl. Whorls convex, but not globose. Suture obscured by a narrow subsutural ridge, below which is a relatively broad groove. Aperture covered by thick callus, delineated by a rounded edge on the inner lip. Two, sometimes three rather small nodules present on parietal lip, lowermost nodule with a lamella extending into the aperture. Columellar lip bears two pronounced folds, lowermost fold crenulated. Outer lip thick, crenulated, with two subtle nodules present on the upper half of the lip. Exterior of the outer lip bears weak striations. Anterior and posterior sinus well-developed.
<bibRefCitationid="EFC24B6B951CFE46FDF1E393018CCCE2"author="Nomura"box="[576,737,1767,1791]"pageId="12"pageNumber="209"refString="Nomura, S. (1939) Notes on some Opisthobranchiata based on the collection of the Saito Ho-on Kai Museum, chiefly collected from Northeast Honshu, Japan. Japanese Journal of Geology and Geography, 16, 11 - 27."type="journal article"year="1939">Nomura, 1939</bibRefCitation>
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is similar in its size and sculpture, but its spire is less elevated, its parietal lip bears only one, larger, nodule and its outer lip is less thick.
<bibRefCitationid="EFC24B6B951CFE46FB68E27E0605CD3E"author="Gould"box="[1241,1384,1802,1827]"pageId="12"pageNumber="209"refString="Gould, A. A. (1860) Ringicula doliaris. In: Gould, A. A. (1859 - 1861) Descriptions of shells collected in the North Pacific Exploring Expedition under Captains Ringgold and Rodgers. Proceedings of the Boston Society for Natural History, 7, 323 - 336."type="journal article"year="1860">Gould, 1860</bibRefCitation>
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is a variable, not well-described species. The specimens figured by
<bibRefCitationid="EFC24B6B951CFE46FCD6E25A0769CD5A"author="Habe"box="[871,1028,1838,1863]"pageId="12"pageNumber="209"refString="Habe, T. (1950 a) Ringiculidae and Retusidae (1) in Japan. Illustrated Catalogue of Japanese Shells, 2, 7 - 16."type="journal article"year="1950"yearSuffix="a">Habe (1950a)</bibRefCitation>
,
<bibRefCitationid="EFC24B6B951CFE46FBA0E25A07FACD5A"author="Hori"box="[1041,1175,1838,1863]"pageId="12"pageNumber="209"refString="Hori, S. (2000) Family Acteonidae. In: Okutani, T. (ed.), Marine Mollusks in Japan. Tokai University Press, Tokyo, pp. 732 - 735."type="book chapter"year="2000">Hori (2000)</bibRefCitation>
and
<bibRefCitationid="EFC24B6B951CFE46FB61E25A06F1CD5A"box="[1232,1436,1838,1863]"pageId="12"pageNumber="209"refString="Higo, S., Callomon, P. & Goto, Y. (2001) Catalogue and Bibliography of the Marine Shell-Bearing Mollusca of Japan, Types. Elle Scientific Publications, Osaka, 1 - 208."type="book chapter">
<bibRefCitationid="EFC24B6B951CFE46FF2FE2260205CD76"box="[158,360,1874,1899]"pageId="12"pageNumber="209"refString="Higo, S., Callomon, P. & Goto, Y. (2001) Catalogue and Bibliography of the Marine Shell-Bearing Mollusca of Japan, Types. Elle Scientific Publications, Osaka, 1 - 208."type="book chapter">
) are slightly smaller, with a slightly less elevated spire, their spiral grooves are further apart, they have only one nodule on their parietal lip, their callus extends further onto the base and their outer lip is less thickened and smooth. The specimens figured by Willan (2010) are similar in shape, but smaller (height only