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<mods:title id="219736CE3B0E86F61708D27AE6DA5DAC">Systematics of the Madagascar Anelosimus spiders: remarkable local richness and endemism, and dual colonization from the Americas</mods:title>
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<mods:namePart id="11853A6B81A89316EE07D3F49CA337B6">Agnarsson, Ingi</mods:namePart>
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<mods:namePart id="312F89EB721465A4434D2D348655DEF8">Jencik, Brian B.</mods:namePart>
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<mods:namePart id="6937DA3B130B8DFFBD03EB9441130971">Veve, Giselle M.</mods:namePart>
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<mods:namePart id="560484E083877401001C365728A1AFAB">Hanitriniaina, Sahondra</mods:namePart>
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<mods:namePart id="65E5B503576D88645609FADD94AEA13A">Agostini, Diego</mods:namePart>
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<mods:namePart id="0C23858B91374E1DB77699D3831F823F">Goh, Seok Ping</mods:namePart>
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<mods:namePart id="891F9028B89EBCC6BC0415652F55B1EA">Pruitt, Jonathan</mods:namePart>
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<mods:namePart id="C76B6D678E447BF8EF014073167A9A00">Kuntner, Matjaz</mods:namePart>
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<treatment id="B55B1D8951D6E4D810E1E5F7E8ABB078" ID-GBIF-Taxon="152060436" LSID="urn:lsid:plazi:treatment:B55B1D8951D6E4D810E1E5F7E8ABB078" httpUri="http://treatment.plazi.org/id/B55B1D8951D6E4D810E1E5F7E8ABB078" lastPageNumber="21" pageId="8" pageNumber="21">
<subSubSection id="1699EEA8B545FD32B41395FB00AFBC09" pageId="8" pageNumber="21" type="multiple">
<paragraph id="3F843D13950A84AA054FDE894CDDAE6B" pageId="8" pageNumber="21">
<pageBreakToken id="BD76353C3D07AAD29D1B497BE82843B3" pageId="8" pageNumber="21" start="start">Taxon</pageBreakToken>
classification Animalia Araneae Theridiidae
</paragraph>
</subSubSection>
<subSubSection id="37BEEC371DB8E40D8AEB4111822E002A" pageId="8" pageNumber="21" type="nomenclature">
<paragraph id="5E65F95A40EB06B79A244B6313C801D6" pageId="8" pageNumber="21">
<taxonomicName id="C28BDC2DFE50C3FDAAA5FB0F4E619C0F" ID-CoL="DWP4" authority="Agnarsson &amp; Kuntner, 2005" authorityName="Agnarsson &amp; Kuntner" authorityYear="2005" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus vondrona" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="vondrona">Anelosimus vondrona Agnarsson &amp; Kuntner, 2005</taxonomicName>
Fig. 3
</paragraph>
</subSubSection>
<subSubSection id="1EFC404CAE409007FD092999572FC53C" pageId="8" pageNumber="21" type="notes">
<paragraph id="B4AC2D7DF64752B6D264F496E5E074AA" pageId="8" pageNumber="21">Notes.</paragraph>
<paragraph id="15347BC64B9F55A5190D1BC24E232782" pageId="8" pageNumber="21">
We here describe the male of
<taxonomicName id="905C8D36B9252AF961FEC8E12FC9E0C2" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus vondrona" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="vondrona">Anelosimus vondrona</taxonomicName>
for the first time and illustrate both sexes to facilitate identification.
</paragraph>
</subSubSection>
<subSubSection id="09D9EC4762F331646CCB24D0F8558681" pageId="8" pageNumber="21" type="type material">
<paragraph id="E1C9FF49B011F0463B71B82BC10FFA21" pageId="8" pageNumber="21">Type material.</paragraph>
<paragraph id="5AB9A5944C16C2B33EF8160EDB3C936E" pageId="8" pageNumber="21">
Holotype female from
<normalizedToken id="CDA6B8C3E3733A732A033B469D74C1F6" originalValue="Périnet">Perinet</normalizedToken>
Special Reserve (P.N. Andasibe Mantadia), Toamasina Province, Madagascar, (
<geoCoordinate id="7E3627DCA4FAF8CAF6D0BC412FCABC12" direction="south" orientation="latitude" precision="55" value="-18.935">18.935°S</geoCoordinate>
,
<geoCoordinate id="BD294F614EBE9009C7EA59ED6E954406" direction="east" orientation="longitude" precision="55" value="48.418">48.418°E</geoCoordinate>
), 7-8.v.2001, montane forest, 900-1000 m, (I. Agnarsson and M. Kuntner), in NMNH, examined.
</paragraph>
</subSubSection>
<subSubSection id="ABC4D033FC05C41445CA1859C15F1F5B" pageId="8" pageNumber="21" type="other material">
<paragraph id="2A7B35443FE57324AFE8D9AA1E7C08B4" pageId="8" pageNumber="21">Other material.</paragraph>
<paragraph id="25266FB61B80BED1A93E3A095273B556" pageId="8" pageNumber="21">
Multiple additional specimens from same locality, 3-20.iv.2008 and 12-28.xi.2008, col. Agnarsson, Kuntner, and Hanitriniaina, and from Ranamofana National Park (
<geoCoordinate id="E3E823E17B4131E46FE1088703AFC7D0" direction="south" orientation="latitude" precision="555" value="-21.25">21.25°S</geoCoordinate>
,
<geoCoordinate id="E91E8208623974250F4C35028AA61772" direction="east" orientation="longitude" precision="555" value="47.43">47.43°E</geoCoordinate>
), montane rainforest, 980-1050 m alt, 27.iv. - 2.v.2013, col. Pruitt.
</paragraph>
</subSubSection>
<subSubSection id="2A083500FA49575B994B12836F5344B9" pageId="8" pageNumber="21" type="diagnosis">
<paragraph id="2726914AC1E24E5D486DC96D82B7151E" pageId="8" pageNumber="21">Diagnosis.</paragraph>
<paragraph id="315F4D19EA91EFBEB5EDD253D0A7D8E1" pageId="8" pageNumber="21">
<taxonomicName id="11BC1FB6599F9F7A68208E6BA9DB37A5" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus vondrona" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="vondrona">Anelosimus vondrona</taxonomicName>
females can be diagnosed from all other species except
<taxonomicName id="55E322C9E3F70E33B0303B85FD5C5A68" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus huxleyi" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="huxleyi">Anelosimus huxleyi</taxonomicName>
by the relatively broad septum that extends the entire width of the epigynum (Fig. 3C) and from
<taxonomicName id="FDD86FE3AE02DC81F0BD75564BA04396" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus huxleyi" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="huxleyi">Anelosimus huxleyi</taxonomicName>
by the less heavily sclerotized lower margin of the epigynal plate. Males can be diagnosed by the shape of the TTA with curved and elongate upper branch (Fig. 3G), and the shape of the Eb (Fig. 3
<normalizedToken id="1AD699E43DE4604AFF359F9CD8B95C73" originalValue="HI">H-I</normalizedToken>
).
<taxonomicName id="C4B1848010CFBA5DC13DCA0EDDA583B8" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus vondrona" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="vondrona">Anelosimus vondrona</taxonomicName>
can be diagnosed from other Madagascan
<taxonomicName id="EA84A62D05601B5CAD2A57032498D809" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="genus">Anelosimus</taxonomicName>
on the basis of the following unique mtDNA nucleotide substitutions at the following standard DNA barcode alignment positions: G (802), T (820). It can also be readily diagnosed from most other
<taxonomicName id="678DD9286A98D481A9EB0F662041B65A" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="genus">Anelosimus</taxonomicName>
based the following partially shared nucleotide substitutions, and all other species by their unique combination: A (163, rarely also in
<taxonomicName id="E0D67DE11F6ACD08344E24E7B3F3C433" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus nazariani" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="nazariani">Anelosimus nazariani</taxonomicName>
), G (466, except
<taxonomicName id="2372185432275542C6BD78BE8ADA9ACB" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus hookeri" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="hookeri">Anelosimus hookeri</taxonomicName>
sp. n.), G (493, except some
<taxonomicName id="6667C2BF017F8CFD047381325B440189" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus may" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="may">Anelosimus may</taxonomicName>
), G (521, except
<taxonomicName id="EE0204A6C018E2FB3D1BEEA1BAFB8ADF" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus salut" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="salut">Anelosimus salut</taxonomicName>
), G (619, except
<taxonomicName id="A08AA01617D586ED9AFA65AC02E06FE1" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus huxleyi" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="huxleyi">Anelosimus huxleyi</taxonomicName>
sp. n.), G (628, except some
<taxonomicName id="94D2FD5D43F1A8C99299C5A68D00D83C" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus may" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="may">Anelosimus may</taxonomicName>
), G (655, except some
<taxonomicName id="AF63596A0F0372171F795434FCFEA6A0" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus huxleyi" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="huxleyi">Anelosimus huxleyi</taxonomicName>
sp. n.), G (760, except most
<taxonomicName id="7544B5EA4BC9A830D4E7AD2E09D0989B" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus nazariani" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="nazariani">Anelosimus nazariani</taxonomicName>
), G (799, except
<taxonomicName id="7B45CA139FC9267409DB95A17FCBC8F3" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus buffoni" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="buffoni">Anelosimus buffoni</taxonomicName>
sp. n.)
</paragraph>
</subSubSection>
<subSubSection id="18ED7328B6CE9F73A6ED11127212E365" pageId="8" pageNumber="21" type="description">
<paragraph id="BE25A2A33D218A5F47440A27247D62F7" pageId="8" pageNumber="21">Description.</paragraph>
<paragraph id="53C5F7F0FFCC22EA6DA79C06E7F1B70C" pageId="8" pageNumber="21">Male (same locality as holotype): Total length 4.47 Cephalothorax 2.03 long, 1.53 wide, 0.49 high. Sternum 1.11 long, 0.94 wide, extending halfway between coxae IV, dark brown. Abdomen 2.40 long, 1.87 wide, 1.89 high, color (Fig. 3A). Eyes subequal in size about 0.13 in diameter. Clypeus height about 2 times one AME diameter Chelicerae with one large tooth, and 3-4 denticles retrolaterally Leg 1 femur 3.16, patella 0.88, tibia 3.15, metatarsus 2.60, tarsus 1.11. Leg formula 1243 Legs are light brown-yellow. 7 small trichobothria dorsally on tibia I and II, and two dorsally on metatarsi.</paragraph>
</subSubSection>
<subSubSection id="45F463AC362E54095D6057F2D24598E4" pageId="8" pageNumber="21" type="distribution">
<paragraph id="A18B4410A8B6797400BE434D5D8A745D" pageId="8" pageNumber="21">Distribution.</paragraph>
<paragraph id="A50CB791B355CD39DF4DF304A95920EF" pageId="8" pageNumber="21">
Eastern Madagascan montane forest, documented from
<normalizedToken id="2069EC47003C4EC567861EBFD50FF68D" originalValue="Périnet">Perinet</normalizedToken>
and Ranamofana.
</paragraph>
</subSubSection>
<subSubSection id="C953104C06EAAF6D4E408E45E5932346" pageId="8" pageNumber="21" type="natural history">
<paragraph id="96FC454FCE9174EAD00F358F2B94C470" pageId="8" pageNumber="21">Natural history.</paragraph>
<paragraph id="DD7B7EB11DF8AA2DD8488B174AD88B99" pageId="8" pageNumber="21">
In Ranamofana, we sampled ten colonies of
<taxonomicName id="20E6197ECDA0F7356896597D4E1AE765" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus vondrona" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="vondrona">Anelosimus vondrona</taxonomicName>
. Six colonies contained a singleton female and four colonies contained a singleton female with a discolored, collapsed egg sac. All of these colonies were found along roadsides and ornamental shrubbery. In
<normalizedToken id="B6A307293D1163B2CF7ED81D04953884" originalValue="Périnet">Perinet</normalizedToken>
a large number of colonies were collected, almost exclusively in open forest, including many with female and up to 53 spiderlings coexisting. An adult female was more commonly present in webs with small juveniles but also found in some nests containing antepenultimate and subadult (5th-6th instar) juveniles, suggesting prolonged cohabitation of mother and young. Foreign spiders were abundant in
<taxonomicName id="C8A7B0D0A7567E5305AAB4899F9C84B7" class="Arachnida" family="Theridiidae" genus="Anelosimus" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Anelosimus vondrona" order="Araneae" pageId="8" pageNumber="21" phylum="Arthropoda" rank="species" species="vondrona">Anelosimus vondrona</taxonomicName>
colonies, including several saliticids, a sparassid, a thomisid, and many theridiids.
</paragraph>
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</treatment>
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