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<mods:title id="2E23312B912AEA053B8406B264539098">The surf flies of the Mascarene Islands (Diptera: Canacidae: Canacinae), with the description of a new species</mods:title>
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Key to Afrotropical 
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<emphasis id="B93BD70D7F0BFFBBFF9534950F55FA1D" bold="true" box="[402,524,1447,1473]" italics="true" pageId="2" pageNumber="565">Isocanace</emphasis>
Mathis
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1. Antennal arista with branches long (
<figureCitation id="1374179A7F0BFFBBFC4334DE0FD9F9DE" box="[580,640,1516,1538]" captionStart="FIGURES 2‒6" captionStartId="4.[151,264,1474,1498]" captionTargetBox="[159,1431,316,1441]" captionTargetId="figure-85@4.[151,1436,309,1450]" captionTargetPageId="4" captionText="FIGURES 2‒6. Antennae and male terminalia of surf flies. 2. Left antenna of Isocanace briani Mathis, lateral view (after Mathis 1982a, from a stereoscan micrograph). 3. Same, I. mauritiana sp. nov. (pubescence of postpedicel omitted); 4. Male left surstylus of I. briani, lateral view, exhibiting characteristic posterior “heel” (from type locality: Madagascar, Sambirano Lokobe Nossi-Be) (after Mathis 1982a). 5. Same, from Aldabra Is. (after Mathis 1982a). 6. Same, I. mauritiana sp. nov. Scale bars: 2‒3 = 0.2 mm; 4‒6 = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5027289" httpUri="https://zenodo.org/record/5027289/files/figure.png" pageId="2" pageNumber="565">Fig. 2</figureCitation>
), some almost double or more than aristal width at base; anepisternal and usually katepisternal setae pale, mostly yellow; male terminalia with posterior part of surstylus (in lateral view) with more or less prominent heel-shaped swelling (
<figureCitation id="1374179A7F0BFFBBFC2637140F2FF9E0" box="[545,630,1574,1596]" captionStart="FIGURES 2‒6" captionStartId="4.[151,264,1474,1498]" captionTargetBox="[159,1431,316,1441]" captionTargetId="figure-85@4.[151,1436,309,1450]" captionTargetPageId="4" captionText="FIGURES 2‒6. Antennae and male terminalia of surf flies. 2. Left antenna of Isocanace briani Mathis, lateral view (after Mathis 1982a, from a stereoscan micrograph). 3. Same, I. mauritiana sp. nov. (pubescence of postpedicel omitted); 4. Male left surstylus of I. briani, lateral view, exhibiting characteristic posterior “heel” (from type locality: Madagascar, Sambirano Lokobe Nossi-Be) (after Mathis 1982a). 5. Same, from Aldabra Is. (after Mathis 1982a). 6. Same, I. mauritiana sp. nov. Scale bars: 2‒3 = 0.2 mm; 4‒6 = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5027289" httpUri="https://zenodo.org/record/5027289/files/figure.png" pageId="2" pageNumber="565">Figs 4, 5</figureCitation>
) (Aldabra Is. &amp; 
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).............................. 
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. 
<emphasis id="B93BD70D7F0BFFBBFB1E3714080DF9E7" box="[1305,1364,1574,1595]" italics="true" pageId="2" pageNumber="565">briani</emphasis>
Mathis
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- Antennal arista with branches distinctly shorter (
<figureCitation id="1374179A7F0BFFBBFCB737760FB0F986" box="[688,745,1604,1626]" captionStart="FIGURES 2‒6" captionStartId="4.[151,264,1474,1498]" captionTargetBox="[159,1431,316,1441]" captionTargetId="figure-85@4.[151,1436,309,1450]" captionTargetPageId="4" captionText="FIGURES 2‒6. Antennae and male terminalia of surf flies. 2. Left antenna of Isocanace briani Mathis, lateral view (after Mathis 1982a, from a stereoscan micrograph). 3. Same, I. mauritiana sp. nov. (pubescence of postpedicel omitted); 4. Male left surstylus of I. briani, lateral view, exhibiting characteristic posterior “heel” (from type locality: Madagascar, Sambirano Lokobe Nossi-Be) (after Mathis 1982a). 5. Same, from Aldabra Is. (after Mathis 1982a). 6. Same, I. mauritiana sp. nov. Scale bars: 2‒3 = 0.2 mm; 4‒6 = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5027289" httpUri="https://zenodo.org/record/5027289/files/figure.png" pageId="2" pageNumber="565">Fig. 3</figureCitation>
), as long as, or marginally longer than, aristal width at base; anepisternal and katepisternal setae black; male terminalia (in lateral view) with posterior part of surstylus without heel-shaped swelling (
<emphasis id="B93BD70D7F0BFFBBFEED374D0DACF948" box="[234,245,1663,1684]" italics="true" pageId="2" pageNumber="565">e</emphasis>
. 
<emphasis id="B93BD70D7F0BFFBBFEFD374D0C5FF948" box="[250,262,1663,1684]" italics="true" pageId="2" pageNumber="565">g</emphasis>
., 
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)......................................................................................... 2
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2. Thorax with anterior notopleural seta present, although weaker and shorter than posterior seta; male terminalia (in lateral view) with surstylus lacking a protruding swelling on anteromedial part, but if swelling present, then this reduced in distal 
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of lateromedian side, bearing cluster of long setulae; surstylus (in lateral view) with gently curved, posteromedial margin, or otherwise, with apical 
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narrow and curved posteriorly (
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, fig. 14)............................................. 3
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<keyLead id="30BEA82A7F0BFFBBFE90362308C5F89F" pageId="2" pageNumber="565">- Thorax with anterior notopleural seta absent or very weak and pale; male terminalia (in lateral view) with surstylus bearing strongly protruding swelling on anteromedial part; surstylus (in lateral view) with broadly curved posteromedial margin... 4</keyLead>
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3. Male terminalia (in lateral view) not as described below, with surstylus very long and narrow, with subapical posterolateral swelling bearing cluster of pale setulae, apical 
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curved posteriorly (
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, fig. 14) (
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&amp; 
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)............................................................................................. 
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. 
<emphasis id="B93BD70D7F0BFFBBFB0736B4080DF847" box="[1280,1364,1926,1947]" italics="true" pageId="2" pageNumber="565">australis</emphasis>
Mathis
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<paragraph id="8BF00B1F7F0BFFBBFE90369608C5F82F" blockId="2.[151,1437,1516,2036]" pageId="2" pageNumber="565">
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- Male terminalia in lateral view with foot-like surstylus (
<figureCitation id="1374179A7F0BFFBBFCF336960E74F866" box="[756,813,1956,1978]" captionStart="FIGURES 2‒6" captionStartId="4.[151,264,1474,1498]" captionTargetBox="[159,1431,316,1441]" captionTargetId="figure-85@4.[151,1436,309,1450]" captionTargetPageId="4" captionText="FIGURES 2‒6. Antennae and male terminalia of surf flies. 2. Left antenna of Isocanace briani Mathis, lateral view (after Mathis 1982a, from a stereoscan micrograph). 3. Same, I. mauritiana sp. nov. (pubescence of postpedicel omitted); 4. Male left surstylus of I. briani, lateral view, exhibiting characteristic posterior “heel” (from type locality: Madagascar, Sambirano Lokobe Nossi-Be) (after Mathis 1982a). 5. Same, from Aldabra Is. (after Mathis 1982a). 6. Same, I. mauritiana sp. nov. Scale bars: 2‒3 = 0.2 mm; 4‒6 = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5027289" httpUri="https://zenodo.org/record/5027289/files/figure.png" pageId="2" pageNumber="565">Fig. 6</figureCitation>
) (broadly resembling that of 
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. 
<emphasis id="B93BD70D7F0BFFBBFA53369609D6F865" box="[1108,1167,1956,1977]" italics="true" pageId="2" pageNumber="565">briani</emphasis>
</taxonomicName>
(
<figureCitation id="1374179A7F0BFFBBFA9C369609B6F865" box="[1179,1263,1955,1978]" captionStart="FIGURES 2‒6" captionStartId="4.[151,264,1474,1498]" captionTargetBox="[159,1431,316,1441]" captionTargetId="figure-85@4.[151,1436,309,1450]" captionTargetPageId="4" captionText="FIGURES 2‒6. Antennae and male terminalia of surf flies. 2. Left antenna of Isocanace briani Mathis, lateral view (after Mathis 1982a, from a stereoscan micrograph). 3. Same, I. mauritiana sp. nov. (pubescence of postpedicel omitted); 4. Male left surstylus of I. briani, lateral view, exhibiting characteristic posterior “heel” (from type locality: Madagascar, Sambirano Lokobe Nossi-Be) (after Mathis 1982a). 5. Same, from Aldabra Is. (after Mathis 1982a). 6. Same, I. mauritiana sp. nov. Scale bars: 2‒3 = 0.2 mm; 4‒6 = 0.1 mm." figureDoi="http://doi.org/10.5281/zenodo.5027289" httpUri="https://zenodo.org/record/5027289/files/figure.png" pageId="2" pageNumber="565">Figs 4, 5</figureCitation>
), but without posterior heel-shaped swelling), with proximal stem long and slender, neck-shaped, mid part moderately swollen, ending distally with anteriorly oriented, sickle-shaped, apical tip (
<collectingCountry id="F3584B8F7F0BFFBBFCC336EC0E7DF828" box="[708,804,2014,2036]" name="Mauritius" pageId="2" pageNumber="565">Mauritius</collectingCountry>
)............................ 
<taxonomicName id="4C4F709C7F0BFFBBFA7936ED0813F828" ID-CoL="9HYL8" authority="Munari" authorityName="Munari &amp; Kirk-Spriggs &amp; Mcgregor" authorityYear="2021" box="[1150,1354,2014,2036]" class="Insecta" family="Canacidae" genus="Isocanace" kingdom="Animalia" order="Diptera" pageId="2" pageNumber="565" phylum="Arthropoda" rank="species" species="mauritiana" status="sp. nov.">
<emphasis id="B93BD70D7F0BFFBBFA7936ED09DFF828" box="[1150,1158,2015,2036]" italics="true" pageId="2" pageNumber="565">I</emphasis>
. 
<emphasis id="B93BD70D7F0BFFBBFA9536ED09A4F828" box="[1170,1277,2015,2036]" italics="true" pageId="2" pageNumber="565">mauritiana</emphasis>
Munari
</taxonomicName>
<emphasis id="B93BD70D7F0BFFBBFB5736EC08C5F82F" bold="true" box="[1360,1436,2014,2035]" pageId="2" pageNumber="565">
<taxonomicNameLabel id="A2086A767F0BFFBBFB5736EC08C5F82F" box="[1360,1436,2014,2035]" pageId="2" pageNumber="565" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</keyLead>
</paragraph>
</keyStep>
<keyStep id="30BB13BA7F0AFFBAFE9031AA08C4FEFF" pageId="3" pageNumber="566">
<paragraph id="8BF00B1F7F0AFFBAFE9031AA08C5FF34" blockId="3.[151,1437,151,291]" pageId="3" pageNumber="566">
<keyLead id="30BEA82A7F0AFFBAFE9031AA08C5FF34" pageId="3" pageNumber="566">
4. Head with 4 lateroclinate fronto-orbital setae; male terminalia with surstylus (in lateral view) narrow, sharply hooked apically, with narrow hook-like tip oriented anteriorly (
<bibRefCitation id="EFDE76EE7F0AFFBAFC9B31870E41FF16" author="Mathis, W. N." box="[668,792,181,203]" pageId="3" pageNumber="566" pagination="347 - 358" refId="ref5793" refString="Mathis, W. N. (1999) A review of the beach-fly genus Isocanace Mathis (Diptera: Canacidae). Proceedings of the Biological Society of Washington, 101, 347 - 358." type="journal article" year="1999">Mathis 1999</bibRefCitation>
, fig. 29) (
<collectingCountry id="F3584B8F7F0AFFBAFD72318709FCFF17" box="[885,1189,181,203]" name="Democratic Republic of the Congo" pageId="3" pageNumber="566">Democratic Republic of Congo</collectingCountry>
)............................................................................................ 
<taxonomicName id="4C4F709C7F0AFFBAFA5E31E108C5FF34" ID-CoL="3Q7J4" authority="(Canzoneri &amp; Meneghini)" baseAuthorityName="Canzoneri &amp; Meneghini" baseAuthorityYear="1969" box="[1113,1436,210,232]" class="Insecta" family="Canacidae" genus="Isocanace" kingdom="Animalia" order="Diptera" pageId="3" pageNumber="566" phylum="Arthropoda" rank="species" species="flava">
<emphasis id="B93BD70D7F0AFFBAFA5E31E10938FF34" box="[1113,1121,211,232]" italics="true" pageId="3" pageNumber="566">I</emphasis>
. 
<emphasis id="B93BD70D7F0AFFBAFA6A31E009C4FF3B" box="[1133,1181,210,231]" italics="true" pageId="3" pageNumber="566">flava</emphasis>
(Canzoneri &amp; Meneghini)
</taxonomicName>
</keyLead>
</paragraph>
<paragraph id="8BF00B1F7F0AFFBAFE9031C208C4FEFF" blockId="3.[151,1437,151,291]" pageId="3" pageNumber="566">
<keyLead id="30BEA82A7F0AFFBAFE9031C208C4FEFF" pageId="3" pageNumber="566">
- Head with 3 lateroclinate fronto-orbital setae; male terminalia with surstylus (in lateral view) strongly broadened medially, tapered apically, with large triangular tip oriented anteriorly (
<bibRefCitation id="EFDE76EE7F0AFFBAFD2B303F0EF1FEFE" author="Mathis, W. N." box="[812,936,269,291]" pageId="3" pageNumber="566" pagination="347 - 358" refId="ref5793" refString="Mathis, W. N. (1999) A review of the beach-fly genus Isocanace Mathis (Diptera: Canacidae). Proceedings of the Biological Society of Washington, 101, 347 - 358." type="journal article" year="1999">Mathis 1999</bibRefCitation>
, fig. 30) (
<collectingCountry id="F3584B8F7F0AFFBAFA01303F091EFEFF" box="[1030,1095,269,291]" name="Kenya" pageId="3" pageNumber="566">Kenya</collectingCountry>
)............ 
<taxonomicName id="4C4F709C7F0AFFBAFAE6303F08C4FEFF" ID-CoL="3Q7J5" authority="Mathis" authorityName="Mathis" authorityYear="1999" box="[1249,1437,269,291]" class="Insecta" family="Canacidae" genus="Isocanace" kingdom="Animalia" order="Diptera" pageId="3" pageNumber="566" phylum="Arthropoda" rank="species" species="freidbergi">
<emphasis id="B93BD70D7F0AFFBAFAE6303F09B0FEFE" box="[1249,1257,269,290]" italics="true" pageId="3" pageNumber="566">I</emphasis>
. 
<emphasis id="B93BD70D7F0AFFBAFAF2303F080AFEFE" box="[1269,1363,269,290]" italics="true" pageId="3" pageNumber="566">freidbergi</emphasis>
Mathis
</taxonomicName>
</keyLead>
</paragraph>
</keyStep>
</subSubSection>
</treatment>
</document>