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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.692.14706" ID-GBIF-Dataset="81f065e7-a342-495c-9855-21bc26539311" ID-PMC="PMC5672734" ID-Pensoft-Pub="1313-2970-692-1" ID-PubMed="29133987" ID-ZBK="1B7C3F517CF543338EAB1CB1BD9D8A07" ModsDocAuthor="" ModsDocDate="2017" ModsDocID="1313-2970-692-1" ModsDocOrigin="ZooKeys 692" ModsDocTitle="A review of the land snail genus Alycaeus (Gastropoda, Alycaeidae) in Peninsular Malaysia" checkinTime="1503352913593" checkinUser="pensoft" docAuthor="Foon, Junn Kitt &amp; Liew, Thor-Seng" docDate="2017" docId="74DA7D7581C4D2D2D8EE1D1B7F710CFA" docLanguage="en" docName="ZooKeys 692: 1-81" docOrigin="ZooKeys 692" docSource="http://dx.doi.org/10.3897/zookeys.692.14706" docTitle="Alycaeus selangoriensis Foon &amp; Liew, 2017, sp. n." docType="treatment" docUuid="B7390E20-CC8B-4893-BC8B-7DB15521E8CC" docUuidSource="ZooBank" docVersion="6" lastPageNumber="43" masterDocId="FF8E6C15A17CDA48FFA7FFE36C7CFFA2" masterDocTitle="A review of the land snail genus Alycaeus (Gastropoda, Alycaeidae) in Peninsular Malaysia" masterLastPageNumber="81" masterPageNumber="1" pageNumber="40" updateTime="1668164728433" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>A review of the land snail genus Alycaeus (Gastropoda, Alycaeidae) in Peninsular Malaysia</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Foon, Junn Kitt</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Liew, Thor-Seng</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
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<mods:titleInfo>
<mods:title>ZooKeys</mods:title>
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<mods:part>
<mods:date>2017</mods:date>
<mods:detail type="volume">
<mods:number>692</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>1</mods:start>
<mods:end>81</mods:end>
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<mods:location>
<mods:url>http://dx.doi.org/10.3897/zookeys.692.14706</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.692.14706</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-692-1</mods:identifier>
<mods:identifier type="ZBK">1B7C3F517CF543338EAB1CB1BD9D8A07</mods:identifier>
<mods:identifier type="ZooBank">1B7C3F517CF543338EAB1CB1BD9D8A07</mods:identifier>
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<treatment ID-GBIF-Taxon="132786254" LSID="urn:lsid:zoobank.org:act:B7390E20-CC8B-4893-BC8B-7DB15521E8CC" httpUri="http://treatment.plazi.org/id/74DA7D7581C4D2D2D8EE1D1B7F710CFA" lastPageId="42" lastPageNumber="43" pageId="39" pageNumber="40">
<subSubSection pageId="39" pageNumber="40" type="nomenclature">
<paragraph pageId="39" pageNumber="40">
<taxonomicName LSID="http://zoobank.org/B7390E20-CC8B-4893-BC8B-7DB15521E8CC" class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus selangoriensis" order="Architaenioglossa" pageId="39" pageNumber="40" phylum="Mollusca" rank="species" species="selangoriensis">Alycaeus selangoriensis</taxonomicName>
<taxonomicNameLabel pageId="39" pageNumber="40">sp. n.</taxonomicNameLabel>
Figures 7U, 27, 31O
</paragraph>
</subSubSection>
<subSubSection pageId="40" pageNumber="41" type="reference_group">
<paragraph pageId="40" pageNumber="41">
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus perakensis" order="Architaenioglossa" pageId="40" pageNumber="41" phylum="Mollusca" rank="species" species="perakensis">
<pageBreakToken pageId="40" pageNumber="41" start="start">Alycaeus</pageBreakToken>
perakensis
</taxonomicName>
:
<bibRefCitation author="Laidlaw, FF" journalOrPublisher="The Bulletin of the Raffles Museum" pageId="51" pageNumber="52" pagination="35 - 41" title="Notes on the land-mollusca of the Batu Caves, Selangor, with descriptions of two new species." url="http://lkcnhm.nus.edu.sg/nus/pdf/PUBLICATION/Raffles%20Bulletin%20of%20Zoology/Past%20Volumes/RBZ%207(1)/07brm035-041.pdf" volume="7" year="1932">Laidlaw 1932</bibRefCitation>
: 37. [not
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus perakensis" order="Architaenioglossa" pageId="40" pageNumber="41" phylum="Mollusca" rank="species" species="perakensis">Alycaeus perakensis</taxonomicName>
Crosse, 1879a]
</paragraph>
<paragraph pageId="40" pageNumber="41">
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus (Alycaeus) perakensis" order="Architaenioglossa" pageId="40" pageNumber="41" phylum="Mollusca" rank="species" species="perakensis" subGenus="Alycaeus">Alycaeus (Alycaeus) perakensis</taxonomicName>
:
<bibRefCitation author="Chan, SY" journalOrPublisher="Club Conchylia Informationen" pageId="49" pageNumber="50" pagination="35 - 46" title="Non-marine mollusks from Selangor, West Malaysia, with a comparison note on introduced species." volume="29" year="1997">Chan 1997</bibRefCitation>
: 37. [not
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus perakensis" order="Architaenioglossa" pageId="40" pageNumber="41" phylum="Mollusca" rank="species" species="perakensis">Alycaeus perakensis</taxonomicName>
Crosse, 1879a]
</paragraph>
<paragraph pageId="40" pageNumber="41">
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus kapayanensis" order="Architaenioglossa" pageId="40" pageNumber="41" phylum="Mollusca" rank="species" species="kapayanensis">Alycaeus kapayanensis</taxonomicName>
:
<bibRefCitation author="Venmans, LAWC" journalOrPublisher="Proceedings of the Malacological Society" pageId="53" pageNumber="54" pagination="81 - 87" title="Notes on Alycaeus." volume="32" year="1956">Venmans 1956</bibRefCitation>
: 83. [not
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus kapayanensis" order="Architaenioglossa" pageId="40" pageNumber="41" phylum="Mollusca" rank="species" species="kapayanensis">Alycaeus kapayanensis</taxonomicName>
Morgan, 1885b]
</paragraph>
<paragraph pageId="40" pageNumber="41">
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" infraspecific-rank="var." kingdom="Animalia" lsidName="Alycaeus perakensis var. minor" order="Architaenioglossa" pageId="40" pageNumber="41" phylum="Mollusca" rank="variety" species="perakensis" variety="minor">Alycaeus perakensis var. minor</taxonomicName>
nomen nudum,
<bibRefCitation author="Clements, R" journalOrPublisher="Biological Conservation" pageId="49" pageNumber="50" pagination="2751 - 2764" title="Using biogeographical patterns of endemic land snails to improve conservation planning for limestone karsts." url="https://doi.org/10.1016/j.biocon.2008.08.011" volume="141" year="2008">Clements et al. 2008</bibRefCitation>
: 2760.
</paragraph>
</subSubSection>
<subSubSection pageId="40" pageNumber="41" type="type locality">
<paragraph pageId="40" pageNumber="41">Type locality.</paragraph>
<paragraph pageId="40" pageNumber="41">
SGR 01 Batu Caves, Selangor (
<geoCoordinate direction="north" orientation="latitude" precision="15" value="3.2380555">3°14'17&quot;N</geoCoordinate>
,
<geoCoordinate direction="east" orientation="longitude" precision="15" value="101.68389">101°41'02&quot;E</geoCoordinate>
).
</paragraph>
</subSubSection>
<subSubSection pageId="40" pageNumber="41" type="type material">
<paragraph pageId="40" pageNumber="41">Type material.</paragraph>
<paragraph pageId="40" pageNumber="41">Holotype. SGR 01 Batu Caves, Selangor: BOR/MOL 12988. Paratypes. SGR 01 Batu Caves, Selangor: BOR/MOL 6808/1, BOR/MOL 8314/9, BOR/MOL 12989/1. SGR 02 Bukit Takun, Selangor: BOR/MOL 6810/7, BOR/MOL 8318/2.</paragraph>
</subSubSection>
<subSubSection lastPageId="41" lastPageNumber="42" pageId="40" pageNumber="41" type="materials_examined">
<paragraph pageId="40" pageNumber="41">Other examined materials.</paragraph>
<paragraph lastPageId="41" lastPageNumber="42" pageId="40" pageNumber="41">
SGR 01 Batu Caves, Selangor: BOR/MOL 268/2, BOR/MOL 6371/&gt;1, BOR/MOL 8315/24, ZRC 1975.2.22.285-382/98, ZRC
<pageBreakToken pageId="41" pageNumber="42" start="start">1997.23</pageBreakToken>
/5, RMNH 153568/16, ZMA 33474/1. SGR 02 Bukit Takun, Selangor: BOR/MOL 6627/14, BOR/MOL 8317/6, ZRC 1975.2.22.190-228/39, ZRC 1975.2.24.403-439/37, ZRC 1997.22/5.
</paragraph>
</subSubSection>
<subSubSection pageId="41" pageNumber="42" type="etymology">
<paragraph pageId="41" pageNumber="42">Etymology.</paragraph>
<paragraph pageId="41" pageNumber="42">Named after Selangor, the state that the type locality of this species is part of.</paragraph>
</subSubSection>
<subSubSection lastPageId="42" lastPageNumber="43" pageId="41" pageNumber="42" type="description">
<paragraph pageId="41" pageNumber="42">Description.</paragraph>
<paragraph pageId="41" pageNumber="42">Protoconch. Smooth.</paragraph>
<paragraph pageId="41" pageNumber="42">Shell shape. Conical. Shell height: 5.07-5.44 mm. Shell width: 5.06-5.88 mm.</paragraph>
<paragraph pageId="42" pageNumber="43">
<pageBreakToken pageId="42" pageNumber="43" start="start">Spire</pageBreakToken>
. Spire height: 1.81-2.00 mm. Spire width: 2.35-2.50 mm. Number of whorls: up to 5
<normalizedToken originalValue="¼">1/4</normalizedToken>
. Spire shape: oblong conical. Whorl periphery rounded. Umbilicus open.
</paragraph>
<paragraph pageId="42" pageNumber="43">Whorl constriction. At about 5 whorls posterior of protoconch.</paragraph>
<paragraph pageId="42" pageNumber="43">Breathing tube. Length: 0.52-0.71 mm.</paragraph>
<paragraph pageId="42" pageNumber="43">Aperture and peristome. Aperture circular, expanded. Aperture height: 2.68-2.37 mm. Aperture width: 2.33-2.61 mm. Peristome double, not thickened, upper palatal section folded posteriorly into a wing-like structure, notched at suture. Peristome orientation 35-40° oblique with respect to the coiling axis.</paragraph>
<paragraph pageId="42" pageNumber="43">Spiral lines. Distinct. Regularly spaced. Approximately 20-33 lines per 1 mm.</paragraph>
<paragraph pageId="42" pageNumber="43">Radial ribs running anterior of breathing tube. Radial ribs pronounced, evenly spaced. Approximately 7-20 ribs per 1 mm.</paragraph>
<paragraph pageId="42" pageNumber="43">Radial ribs running perpendicular to breathing tube. Radial ribs pronounced, white and thicker than those anterior of breathing tube, evenly spaced. Approximately 11-21 ribs per 1 mm.</paragraph>
<paragraph pageId="42" pageNumber="43">Radial ribs running posterior of breathing tube. Radial ribs absent immediately posterior of constriction, becoming pronounced and evenly spaced at the middle until prior to aperture. Approximately 9-14 ribs per 1 mm.</paragraph>
<paragraph pageId="42" pageNumber="43">Operculum. Concave, rounded. Exterior covered with thick but flaky calcareous layer, surface finely granulated. Interior proteinaceous layered, smooth, with indistinct mamilla.</paragraph>
<paragraph pageId="42" pageNumber="43">Shell colour. Whorls yellow. Peristome white.</paragraph>
<paragraph pageId="42" pageNumber="43">Living animal. Body cream-white. Head pinkish-brown. Tentacles reddish-brown.</paragraph>
</subSubSection>
<subSubSection pageId="42" pageNumber="43" type="habitat">
<paragraph pageId="42" pageNumber="43">Habitat and ecology.</paragraph>
<paragraph pageId="42" pageNumber="43">Lives on wet limestone walls covered with mosses, in forested areas. It can also be found in areas with substantial human disturbance such as on the limestone walls of the temple at Batu Caves.</paragraph>
</subSubSection>
<subSubSection pageId="42" pageNumber="43" type="distribution">
<paragraph pageId="42" pageNumber="43">Distribution.</paragraph>
<paragraph pageId="42" pageNumber="43">Restricted to Batu Caves and Bukit Takun, Selangor.</paragraph>
</subSubSection>
<subSubSection pageId="42" pageNumber="43" type="differential diagnosis">
<paragraph pageId="42" pageNumber="43">Differential diagnosis.</paragraph>
<paragraph pageId="42" pageNumber="43">
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus selangoriensis" order="Architaenioglossa" pageId="42" pageNumber="43" phylum="Mollusca" rank="species" species="selangoriensis">Alycaeus selangoriensis</taxonomicName>
sp. n. is most similar to
<taxonomicName lsidName="A. kapayanensis" pageId="42" pageNumber="43" rank="species" species="kapayanensis">A. kapayanensis</taxonomicName>
but differs in having a consistently larger shell (larger by about 0.96 mm in shell height, 1.6 mm in shell width), more expanded ultimate whorl and thicker operculum with calcareous exterior. The upper palatal section of the peristome in
<taxonomicName lsidName="A. selangoriensis" pageId="42" pageNumber="43" rank="species" species="selangoriensis">A. selangoriensis</taxonomicName>
sp. n. is always folded posteriorly and downwards, creating a wing-like extension prior to the notch at the suture, a feature not present in the simple circular expanded peristome of
<taxonomicName lsidName="A. kapayanensis" pageId="42" pageNumber="43" rank="species" species="kapayanensis">A. kapayanensis</taxonomicName>
.
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus selangoriensis" order="Architaenioglossa" pageId="42" pageNumber="43" phylum="Mollusca" rank="species" species="selangoriensis">Alycaeus selangoriensis</taxonomicName>
sp. n. resembles
<taxonomicName lsidName="A. perakensis" pageId="42" pageNumber="43" rank="species" species="perakensis">A. perakensis</taxonomicName>
in having a moderately expanded ultimate whorl but differs in being smaller shelled (smaller by about 1.37 mm in shell height, 2.08 mm in shell width).
</paragraph>
</subSubSection>
<subSubSection pageId="42" pageNumber="43" type="discussion">
<paragraph pageId="42" pageNumber="43">Discussion.</paragraph>
<paragraph pageId="42" pageNumber="43">
Historically,
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus selangoriensis" order="Architaenioglossa" pageId="42" pageNumber="43" phylum="Mollusca" rank="species" species="selangoriensis">Alycaeus selangoriensis</taxonomicName>
sp. n. shells have been assigned to superficially similar congeners
<taxonomicName lsidName="A. perakensis" pageId="42" pageNumber="43" rank="species" species="perakensis">A. perakensis</taxonomicName>
and
<taxonomicName lsidName="A. kapayanensis" pageId="42" pageNumber="43" rank="species" species="kapayanensis">A. kapayanensis</taxonomicName>
(
<bibRefCitation author="Laidlaw, FF" journalOrPublisher="The Bulletin of the Raffles Museum" pageId="51" pageNumber="52" pagination="35 - 41" title="Notes on the land-mollusca of the Batu Caves, Selangor, with descriptions of two new species." url="http://lkcnhm.nus.edu.sg/nus/pdf/PUBLICATION/Raffles%20Bulletin%20of%20Zoology/Past%20Volumes/RBZ%207(1)/07brm035-041.pdf" volume="7" year="1932">Laidlaw 1932</bibRefCitation>
,
<bibRefCitation author="Venmans, LAWC" journalOrPublisher="Proceedings of the Malacological Society" pageId="53" pageNumber="54" pagination="81 - 87" title="Notes on Alycaeus." volume="32" year="1956">Venmans 1956</bibRefCitation>
,
<bibRefCitation author="Chan, SY" journalOrPublisher="Club Conchylia Informationen" pageId="49" pageNumber="50" pagination="35 - 46" title="Non-marine mollusks from Selangor, West Malaysia, with a comparison note on introduced species." volume="29" year="1997">Chan 1997</bibRefCitation>
, ZRC and RMNH collection lots).
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus selangoriensis" order="Architaenioglossa" pageId="42" pageNumber="43" phylum="Mollusca" rank="species" species="selangoriensis">Alycaeus selangoriensis</taxonomicName>
sp. n. has also been labelled as &quot;
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus kapayanensis" order="Architaenioglossa" pageId="42" pageNumber="43" phylum="Mollusca" rank="species" species="kapayanensis">Alycaeus kapayanensis</taxonomicName>
var.
<taxonomicName genus="Caenogastropoda" lsidName="Caenogastropoda minor var. minor" pageId="42" pageNumber="43" rank="variety" species="minor" variety="minor">minor</taxonomicName>
&quot;, a nomen nudum (
<bibRefCitation author="Clements, R" journalOrPublisher="Biological Conservation" pageId="49" pageNumber="50" pagination="2751 - 2764" title="Using biogeographical patterns of endemic land snails to improve conservation planning for limestone karsts." url="https://doi.org/10.1016/j.biocon.2008.08.011" volume="141" year="2008">Clements et al. 2008</bibRefCitation>
, ZRC collection lots).
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus selangoriensis" order="Architaenioglossa" pageId="42" pageNumber="43" phylum="Mollusca" rank="species" species="selangoriensis">Alycaeus selangoriensis</taxonomicName>
sp. n. is morphologically consistent in having a very expanded ultimate whorl but varies in spire height.
<bibRefCitation author="Venmans, LAWC" journalOrPublisher="Proceedings of the Malacological Society" pageId="53" pageNumber="54" pagination="81 - 87" title="Notes on Alycaeus." volume="32" year="1956">Venmans (1956)</bibRefCitation>
described and found that the radula and jaw of
<taxonomicName lsidName="A. selangoriensis" pageId="42" pageNumber="43" rank="species" species="selangoriensis">A. selangoriensis</taxonomicName>
sp. n. differ substantially from
<taxonomicName lsidName="A. thieroti" pageId="42" pageNumber="43" rank="species" species="thieroti">A. thieroti</taxonomicName>
and
<taxonomicName lsidName="A. conformis" pageId="42" pageNumber="43" rank="species" species="conformis">A. conformis</taxonomicName>
.
</paragraph>
<caption pageId="42" pageNumber="43">
<paragraph pageId="42" pageNumber="43">
Figure 27.
<taxonomicName class="Gastropoda" family="Alycaeidae" genus="Alycaeus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Alycaeus selangoriensis" order="Architaenioglossa" pageId="42" pageNumber="43" phylum="Mollusca" rank="species" species="selangoriensis">Alycaeus selangoriensis</taxonomicName>
sp. n.
<normalizedToken originalValue="AE">A-E</normalizedToken>
Shell of holotype, BOR/MOL 12988
<normalizedToken originalValue="FH">F-H</normalizedToken>
Close up of shell of holotype, BOR/MOL 12988
<normalizedToken originalValue="IL">I-L</normalizedToken>
Operculum of paratype, BOR/MOL 6808. Scale bars:
<normalizedToken originalValue="AE">A-E</normalizedToken>
, F, G, H 1 mm;
<normalizedToken originalValue="IL">I-L</normalizedToken>
0.5 mm. All photographs by Junn Kitt Foon.
</paragraph>
</caption>
</subSubSection>
</treatment>
</document>