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<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">Octostruma lutzi</taxonomicName>
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(Wheeler, 1913) Revised Status
</paragraph>
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<subSubSection pageId="40" pageNumber="41" type="description">
<paragraph pageId="40" pageNumber="41" type="mainText">(Figs 1E, 3D, 5A, 5B, 30, 42)</paragraph>
<subSubSection id="1F3330B29EA851885A59066BDDA8E1FB" pageId="40" pageNumber="41" type="description">
<paragraph id="227CDEB7063C0A3B45D3F9BA044113FD" pageId="40" pageNumber="41" type="mainText">(Figs 1E, 3D, 5A, 5B, 30, 42)</paragraph>
</subSubSection>
<subSubSection pageId="40" pageNumber="41" type="reference_group">
<paragraph pageId="40" pageNumber="41" type="mainText">
<taxonomicName authority="Wheeler" authorityName="Wheeler" class="Insecta" family="Formicidae" genus="Rhopalothrix" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi" subGenus="Octostruma">Rhopalothrix (Octostruma) lutzi Wheeler</taxonomicName>
<subSubSection id="A60AEE760053E91C1066EA75EABA686E" pageId="40" pageNumber="41" type="reference_group">
<paragraph id="B959EB4FD6832AE9AC3136B75F941642" pageId="40" pageNumber="41" type="mainText">
<taxonomicName id="E76E7C04644B4902E75711DDF6A192DB" authority="Wheeler" authorityName="Wheeler" class="Insecta" family="Formicidae" genus="Rhopalothrix" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi" subGenus="Octostruma">Rhopalothrix (Octostruma) lutzi Wheeler</taxonomicName>
, 1913: 241. Lectotype worker: Dominica, Laudet &amp; Long Ditton, near Roseau (Lutz) [MCZC, MCZ-ENT00303378] (examined); non-type queen: same data as lectotype [AMNH?] (not examined). Combination in
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="genus">Octostruma</taxonomicName>
<taxonomicName id="F30DD9E5745DEA0C8355915B8704132B" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="genus">Octostruma</taxonomicName>
: Brown, 1949: 92. Junior synonym of
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="balzani">Octostruma balzani</taxonomicName>
<taxonomicName id="3E0D7F8120447F3C10AFD87349BFF7C6" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="balzani">Octostruma balzani</taxonomicName>
: Brown &amp; Kempf, 1960: 194. Revised Status.
</paragraph>
</subSubSection>
<subSubSection pageId="40" pageNumber="41" type="distribution">
<paragraph pageId="40" pageNumber="41" type="mainText">Geographic range. Dominica, Guadeloupe.</paragraph>
<subSubSection id="42DA774DE2005F2413355C1BBF343BC6" pageId="40" pageNumber="41" type="distribution">
<paragraph id="B0DBE8AF14D61CEF0257099D69B3C2D3" pageId="40" pageNumber="41" type="mainText">Geographic range. Dominica, Guadeloupe.</paragraph>
</subSubSection>
<subSubSection pageId="40" pageNumber="41" type="description">
<paragraph pageId="40" pageNumber="41" type="mainText">
<subSubSection id="AFFC7FFB92CC73B8D530D7847FB65401" pageId="40" pageNumber="41" type="description">
<paragraph id="CC2964B1D7729EF55FF77B6D0013EE75" pageId="40" pageNumber="41" type="mainText">
Description. Worker. Dominica: HW 0.56-0.61, HL 0.55-0.59, WL 0.61-0.64, CI 102-104 (n=3). Guadeloupe: HW 0.57-0.62, HL 0.53-0.58, WL 0.60-0.65, CI 107-109 (n=6). Face setation as in Fig. 5A or 5B; mesosoma typically with two pairs spatulate setae, one on pronotum and one on mesonotum (pronotal setae lacking in all other balzani-group species except
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="batesi">O. batesi</taxonomicName>
<taxonomicName id="025CB452986A5D031699FDAF038371E3" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="batesi">O. batesi</taxonomicName>
and
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="betschi">O. betschi</taxonomicName>
<taxonomicName id="1C1A2EC3968E2334DFA1379BBEF7ADDE" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="betschi">O. betschi</taxonomicName>
); posterolateral margin of head subequal to or longer than anterolateral margin (posterolateral margin shorter than anterolateral margin in
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="batesi">O. batesi</taxonomicName>
<taxonomicName id="E12819A100850BA352D6F5B50223F195" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="batesi">O. batesi</taxonomicName>
and
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="betschi">O. betschi</taxonomicName>
<taxonomicName id="7C2F781476AB517500E4089CADC9721A" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="betschi">O. betschi</taxonomicName>
); color dark brown on Guadeloupe.
</paragraph>
<paragraph pageId="40" pageNumber="41" type="mainText">Queen. The Dominica queen described by Wheeler was not examined. Guadeloupe queen: HW 0.65-0.66, HL 0.61-0.62, WL 0.77-0.80, CI 105-108 (n=3). Labrum, mandible, scape, antennal scrobe, and head sculpture similar to worker; face with 8-10 erect setae distributed symmetrically around lateral and posterior margins of head, a seta on low ridge in front of each compound eye, 4 setae across vertex between compound eyes; ocelli distinct; compound eye large, multifaceted, about 12 ommatidia in longest row.</paragraph>
<paragraph pageId="40" pageNumber="41" type="mainText">Mesosoma with queen-typical alar sclerites; sculpture like workers; anepisternum and katepisternum separated by strong sulcus; posterodorsal propodeum concave; propodeal spines pronounced, in the form of flattened perpendicular plates, acute in profile; pronotum with 4 erect setae, mesoscutum with 10-12, axilla with 1, scutellum with 2, metanotum with 2, petiolar node with 4, postpetiolar disc with 4, first gastral tergite with about 40. Other characters similar to worker.</paragraph>
<paragraph id="04F9403D00043F9DB6851E02FF89EF95" pageId="40" pageNumber="41" type="mainText">Queen. The Dominica queen described by Wheeler was not examined. Guadeloupe queen: HW 0.65-0.66, HL 0.61-0.62, WL 0.77-0.80, CI 105-108 (n=3). Labrum, mandible, scape, antennal scrobe, and head sculpture similar to worker; face with 8-10 erect setae distributed symmetrically around lateral and posterior margins of head, a seta on low ridge in front of each compound eye, 4 setae across vertex between compound eyes; ocelli distinct; compound eye large, multifaceted, about 12 ommatidia in longest row.</paragraph>
<paragraph id="B853E5C57A313C89605376ED7FBA5D42" pageId="40" pageNumber="41" type="mainText">Mesosoma with queen-typical alar sclerites; sculpture like workers; anepisternum and katepisternum separated by strong sulcus; posterodorsal propodeum concave; propodeal spines pronounced, in the form of flattened perpendicular plates, acute in profile; pronotum with 4 erect setae, mesoscutum with 10-12, axilla with 1, scutellum with 2, metanotum with 2, petiolar node with 4, postpetiolar disc with 4, first gastral tergite with about 40. Other characters similar to worker.</paragraph>
</subSubSection>
<subSubSection pageId="40" pageNumber="41" type="biology_ecology">
<paragraph pageId="40" pageNumber="41" type="mainText">
<subSubSection id="240809E6D60D61FDCD56A50B9EC70DEB" pageId="40" pageNumber="41" type="biology_ecology">
<paragraph id="D73359B6672C668DD9EE0EBE0A1FC5DE" pageId="40" pageNumber="41" type="mainText">
Biology.
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">Octostruma lutzi</taxonomicName>
<taxonomicName id="01143EFEEB724238630D26BD7D77E5B6" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">Octostruma lutzi</taxonomicName>
is an island species endemic to Dominica and Guadeloupe in the Lesser Antilles. The syntypes were collected &quot;sifting leaves in forest and among bananas and tree-ferns along the edge of it.&quot; (Wheeler, 1913). On Guadeloupe, it occurs from sea level to 800 m elevation, in a variety of forested habitats including wet and seasonal dry forest, mahogany plantation, and cloud forest. All Guadeloupe specimens are from Winkler samples of sifted litter and rotten wood from the forest floor. Dealate queens often occur together with workers in litter samples.
</paragraph>
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<paragraph pageId="40" pageNumber="41" type="mainText">
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<paragraph id="B7F889E1A368C01CE2E329C5D9A1B281" pageId="40" pageNumber="41" type="mainText">
Comments. The original syntype series of
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">O. lutzi</taxonomicName>
<taxonomicName id="FD7A6218302B6DC6B1278989E22865DB" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">O. lutzi</taxonomicName>
contained both
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">O. lutzi</taxonomicName>
<taxonomicName id="912C680F77DC8646E87B41D49C1B8024" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">O. lutzi</taxonomicName>
(one of which was designated lectotype in Brown and Kempf, 1960) and
<taxonomicName authority="Longino" authorityName="Longino" class="Insecta" family="Formicidae" genus="Eurhopalothrix" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="guadeloupensis">Eurhopalothrix guadeloupensis Longino</taxonomicName>
<taxonomicName id="F27C0811A0A9C2EF535329B22C16B1D9" authority="Longino" authorityName="Longino" class="Insecta" family="Formicidae" genus="Eurhopalothrix" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="guadeloupensis">Eurhopalothrix guadeloupensis Longino</taxonomicName>
2013. Wheeler's description of
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">O. lutzi</taxonomicName>
<taxonomicName id="5EE7EDC2373B60A23533A4DEBE2898E1" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">O. lutzi</taxonomicName>
pertains to
<taxonomicName class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">O. lutzi</taxonomicName>
<taxonomicName id="809E66F3D236CB0A0BA7386467E41C96" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="species" species="lutzi">O. lutzi</taxonomicName>
for the most part, but the description of pilosity better fits the
<taxonomicName class="Insecta" family="Formicidae" genus="Eurhopalothrix" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="genus">Eurhopalothrix</taxonomicName>
<taxonomicName id="73776CF66D753156866B9D3489C62D29" class="Insecta" family="Formicidae" genus="Eurhopalothrix" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="40" pageNumber="41" phylum="Arthropoda" rank="genus">Eurhopalothrix</taxonomicName>
worker. The identity of the described queen remains uncertain.
</paragraph>
<paragraph lastPageId="41" lastPageNumber="42" pageId="40" pageNumber="41" type="mainText">
<paragraph id="E70D81E8BC896DC18709389080E06A44" lastPageId="41" lastPageNumber="42" pageId="40" pageNumber="41" type="mainText">
The degree to which the Dominica and Guadeloupe populations are differentiated is poorly known. Examined
<pageBreakToken pageId="41" pageNumber="42" start="start">workers</pageBreakToken>
<pageBreakToken id="9E6549A0E458510F2314347E912BE7BE" pageId="41" pageNumber="42" start="start">workers</pageBreakToken>
from Dominica (the MCZC type series of
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<taxonomicName id="E9F00FC9ECFF6DFBDF2CFE42B53D1266" class="Insecta" family="Formicidae" genus="Octostruma" higherTaxonomySource="CoL" kingdom="Animalia" order="Hymenoptera" pageId="41" pageNumber="42" phylum="Arthropoda" rank="species" species="lutzi">O. lutzi</taxonomicName>
) have distinctly narrower heads than workers from Guadeloupe (CI 102-104 vs. 107-109). The Dominica workers are light orange brown and the Guadeloupe workers are dark brown, but the former are also over 100 years old and may have faded.
</paragraph>
</subSubSection>