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<document id="F44D57FDB729F746EC5197F35F3FFE9C" ID-DOI="10.5281/zenodo.210467" ID-GBIF-Dataset="615fa257-67b1-4410-899e-ec426733c373" ID-ISSN="1175-5326" ID-Zenodo-Dep="210467" IM.metadata_approvedBy="felipe" IM.taxonomicNames_approvedBy="felipe" checkinTime="1460510026844" checkinUser="plazi" docAuthor="Teslenko, Valentina A. &amp; Zhiltzova, Lidia A." docDate="2012" docId="AA6887E0DB187C2CA88AC038D5A5B52C" docLanguage="en" docName="zt03427p062.pdf" docOrigin="Zootaxa 3427" docStyle="DocumentStyle:890A69B780ED73D6DB8551B71C8AC79E.4:Zootaxa.2009-2012.journal_article" docStyleId="890A69B780ED73D6DB8551B71C8AC79E" docStyleName="Zootaxa.2009-2012.journal_article" docStyleVersion="4" docTitle="Arcynopteryx angarensis Teslenko &amp; Zhiltzova, sp. n." docType="treatment" docVersion="9" lastPageNumber="60" masterDocId="5651FF98DB197C28A81DC173D60BB653" masterDocTitle="A new rare species of Arcynopteryx (Plecoptera: Perlodidae) from the basin of Lake Baikal (Russia)" masterLastPageNumber="62" masterPageNumber="57" pageNumber="58" updateTime="1698313254702" updateUser="plazi">
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<mods:title id="2530330082AA5BBDFAB70B5A121A84C6">A new rare species of Arcynopteryx (Plecoptera: Perlodidae) from the basin of Lake Baikal (Russia)</mods:title>
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<paragraph id="227E36F6DB187C29A88AC038D500B737" blockId="1.[151,779,331,391]" box="[151,779,331,356]" pageId="1" pageNumber="58">
<heading id="7936819ADB187C29A88AC038D500B737" bold="true" box="[151,779,331,356]" fontSize="10" level="2" pageId="1" pageNumber="58" reason="2">
<emphasis id="10B5EAE4DB187C29A88AC038D500B737" bold="true" box="[151,779,331,356]" pageId="1" pageNumber="58">
<taxonomicName id="E5C14D75DB187C29A88AC038D4B4B737" ID-CoL="GC8Z" authority="Teslenko &amp; Zhiltzova" authorityName="Teslenko &amp; Zhiltzova" box="[151,703,331,356]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="1" pageNumber="58" phylum="Arthropoda" rank="species" species="angarensis" status="sp. nov.">
<emphasis id="10B5EAE4DB187C29A88AC038D7BCB737" bold="true" box="[151,439,331,356]" italics="true" pageId="1" pageNumber="58">Arcynopteryx angarensis</emphasis>
Teslenko &amp; Zhiltzova
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, 
<taxonomicNameLabel id="0B86579FDB187C29AAD1C03FD500B737" box="[716,779,332,356]" pageId="1" pageNumber="58" rank="species">sp. n.</taxonomicNameLabel>
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<paragraph id="227E36F6DB187C29A88AC01CD72BB7D4" blockId="1.[151,779,331,391]" box="[151,288,367,391]" pageId="1" pageNumber="58">
(
<figureCitation id="BAFA2A73DB187C29A882C01CD718B7D4" box="[159,275,367,391]" captionStart-0="FIGURES 1 – 8" captionStart-1="FIGURES 9 – 12" captionStartId-0="2.[151,264,1905,1928]" captionStartId-1="3.[151,264,1100,1123]" captionTargetBox-0="[156,1434,379,1855]" captionTargetBox-1="[151,1436,194,1083]" captionTargetId-0="figure@2.[151,1436,373,1885]" captionTargetId-1="figure@3.[151,1436,193,1097]" captionTargetPageId-0="2" captionTargetPageId-1="3" captionText-0="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." captionText-1="FIGURES 9 – 12. Arcynopteryx angarensis, egg: 9. Habitus: anchor, chorion structure, lateral. 10. Collar and shoulder, lateral. 11. Chorion structure with micropile row, dorsal. 12. Micropylar orifice and lip, dorsal view." httpUri-0="https://zenodo.org/record/210468/files/figure.png" httpUri-1="https://zenodo.org/record/210469/files/figure.png" pageId="1" pageNumber="58">Figs 1–12</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="6ADB657DDB187C2BA88AC0C4D322B3D4" lastPageId="3" lastPageNumber="60" pageId="1" pageNumber="58" type="description">
<paragraph id="227E36F6DB187C29A88AC0C4D33DB2F1" blockId="1.[151,1437,439,1981]" pageId="1" pageNumber="58">
<emphasis id="10B5EAE4DB187C29A88AC0C4D72AB783" bold="true" box="[151,289,439,464]" pageId="1" pageNumber="58">Description</emphasis>
of the general body color is given for dry, pinned specimens; descriptions of male, female, and egg for alcohol-preserved specimens. The head and pronotum are yellowish-brown, contrasting with the maroon meso- and metanotum and the dark brown abdomen. In front of the pale M-line, a dark spot projects onto the clypeus. This spot is more pronounced in females than males (
<figureCitation id="BAFA2A73DB187C29AAE7C357D536B46F" box="[762,829,548,572]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 1</figureCitation>
). Behind the pale M-line, a brown M-shaped band is present, the lateral branches of which are light brown, and medially dark brown. Dark brown stripes connect the anterior and lateral ocelli. The interocellar area exhibits a triangular pale spot that is connected to a semicircular pale spot on the occiput medially. Two oblique, brown bands with a curlicue at the apex extend from the occiput along the epicranial suture towards the compound eyes, but these bands do not quite reach the eyes (
<figureCitation id="BAFA2A73DB187C29AD09C3C7D35CB49F" box="[1300,1367,692,716]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 1</figureCitation>
). The tentorial pits in front of the lateral ocelli are pale. Behind each compound eye is a dark posterolateral spot, with slightly darkened occipital lateral margins (
<figureCitation id="BAFA2A73DB187C29AA91C38FD4DAB547" box="[652,721,764,788]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 1</figureCitation>
). The female has a monochrome brown occiput, except for a medial semicircular pale spot. The antennae and palpi are grayish-brown, and the basal antennal segments are brown. The submental gills are long. The pronotum is yellowish-brown, with thin, blackish margins, and a broad, median yellow band that is widest in its basal third (
<figureCitation id="BAFA2A73DB187C29AAC1C214D516B52C" box="[732,797,871,895]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 1</figureCitation>
). The pronotal rugosities are dark brown. The meso- and metascuta are maroon. The mesosternal Y-arms reach the anterior corners of the furcal pits. The abdomen is dark brown, each dorsal segment covered by long, grayish hairs positioned posterolaterally. Legs are brown, tarsi – dark brown. The cerci are longer than the abdomen, with long colourless hairs; the basal cercal segments are brown, the apical cercal segments are blackish in their distal half. Males and females are macropterous. The forewing is long, narrow, pale gray, transparent, yellowish apically, with brown veins, and pale yellow C. The venation includes an irregular net near the apex, sometimes consisting of three rows of cells (
<figureCitation id="BAFA2A73DB187C29ABA1C54CD20AB204" box="[956,1025,1087,1111]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 2</figureCitation>
). Three cross veins occur between C and Sc, and four apical veins occur between Sc and R1. Rs have four apical branches. Four veins occur between М and Cu2; three anal veins are present. The hind wing anal area is large, and A2 and A5 are forked (
<figureCitation id="BAFA2A73DB187C29ACFEC5F9D322B2F1" box="[1251,1321,1162,1186]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 2</figureCitation>
).
</paragraph>
<paragraph id="227E36F6DB187C29A8D4C5C1D740B1EE" blockId="1.[151,1437,439,1981]" pageId="1" pageNumber="58">
<emphasis id="10B5EAE4DB187C29A8D4C5C1D706B299" bold="true" box="[201,269,1202,1226]" pageId="1" pageNumber="58">Male.</emphasis>
Body length 14.3−16.2 mm, forewing 12.8−14.6 mm, wingspan 28.1−32.3 mm. The abdominal tergum 9 exhibits a thin, membranous, pale median line (
<figureCitation id="BAFA2A73DB187C29AAD1C5A6D519B2BE" box="[716,786,1237,1261]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 3</figureCitation>
). The posterior margin has a medial arcuate notch which runs 1/3 of the length of tergum 9, and two submedial, transversely elongated and rounded swellings, which are covered by small stout setae close to the notch, and by long fine colorless hairs posterolaterally (
<figureCitation id="BAFA2A73DB187C29ACD2C46ED318B366" box="[1231,1299,1309,1333]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 3</figureCitation>
). Sternum 9 is light brown medially, scoop-shaped, extended backward and curved upward (
<figureCitation id="BAFA2A73DB187C29AC01C432D26AB30A" box="[1052,1121,1345,1369]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 6</figureCitation>
). Tergum 10 is divided into two hemiterga (
<figureCitation id="BAFA2A73DB187C29A957C416D79BB32E" box="[330,400,1381,1405]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 3</figureCitation>
). The hemitergal lobes in a dorsal view are elongated, flattened, directed medially, and are not in contact mesoanteriorly (
<figureCitation id="BAFA2A73DB187C29A9F3C4FAD460B3F2" box="[494,619,1417,1441]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Figs 3 &amp; 4</figureCitation>
). Each hemitergal lobe bears a tear-shaped knob that is widest anteriorly (
<figureCitation id="BAFA2A73DB187C29A882C4DED713B396" box="[159,280,1453,1477]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Figs 3 &amp; 4</figureCitation>
). The knob is dorsally flat and pale, ventrally darkly sclerotized, and covered by a few small, stout setae (
<figureCitation id="BAFA2A73DB187C29A882C4A2D70DB3BA" box="[159,262,1489,1513]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Figs 3–6</figureCitation>
). The cowl opens dorsally in a slit; the cowl is membranous, folded. It resembles a deep pouch between and under the hemitergal lobes and is attached around the base of the epiproct and the internal basal anchor (
<figureCitation id="BAFA2A73DB187C29AD52C486D6D2B062" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Figs 3, 5 &amp; 6</figureCitation>
). The dorsolateral edges of the cowl are large, supported by flat sclerotized paragenital plates and by tops of the lateral sclerotized bands (
<figureCitation id="BAFA2A73DB187C29A9C0C74ED45DB006" box="[477,598,1597,1621]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Figs 3 &amp; 5</figureCitation>
). In lateral view, the lever arm of the epiproct is slightly arcuate and terminates in a vertical, long, slightly sclerotized plate, the top of which serves as a place for the attachment of the loop of the stylet and two sclerotized bands (
<figureCitation id="BAFA2A73DB187C29AA75C7F6D4A4B0CE" box="[616,687,1669,1693]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 5</figureCitation>
). The stylet of the epiproct resembles a strong, long, fine bristle directed upward and backward; the base of the loop of the stylet is wide (
<figureCitation id="BAFA2A73DB187C29ABD6C7DAD204B092" box="[971,1039,1705,1729]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 5</figureCitation>
), and occupies half of the length of the vertical plate (
<figureCitation id="BAFA2A73DB187C29A942C7BED7A8B0B6" box="[351,419,1741,1765]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 5</figureCitation>
). The two lateral sclerotized bands narrowed at the base, are more sclerotized dorsally than laterally, and have a small mesal mound on the dorsal surface; the tops of the lateral sclerotized bands are narrowed and rounded, directed obliquely forward (
<figureCitation id="BAFA2A73DB187C29AA76C666D4A4B17E" box="[619,687,1813,1837]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 5</figureCitation>
). The everted aedeagus is membranous, bears a large median lobe, and two small dorsolateral lobes. A large prolonged median lobe is narrowed to the tip, which is rounded and down curved. In lateral view, the aedeagal apex resembles a rounded claw, covered by fine, erect, clear spinules dorsolaterally and ventrally (
<figureCitation id="BAFA2A73DB187C29A994C6F2D405B1CA" box="[393,526,1921,1945]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Figs 6 &amp; 7</figureCitation>
). A pair of small dorsolateral lobes directed backward, the lobes are not fully everted (
<figureCitation id="BAFA2A73DB187C29A8E4C6D6D736B1EE" box="[249,317,1957,1981]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="1" pageNumber="58">Fig. 6</figureCitation>
).
</paragraph>
<paragraph id="227E36F6DB1B7C2AA8D4C1EBD516B76C" blockId="2.[151,1436,151,319]" pageId="2" pageNumber="59">
<emphasis id="10B5EAE4DB1B7C2AA8D4C1EBD72CB6E3" bold="true" box="[201,295,152,176]" pageId="2" pageNumber="59">Female.</emphasis>
Body length 16.0−17.3 mm, forewing 17.0−17.3 mm, wingspan 37.0−37.6 mm. The subgenital plate is large and pale, extends laterally from the sides of sternum 8, sometimes reaching almost half the length of sternum 9 (
<figureCitation id="BAFA2A73DB1B7C2AA8F1C1ACD73BB6A4" box="[236,304,223,247]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="2" pageNumber="59">Fig. 8</figureCitation>
). The posterior margin of the subgenital plate has a deep notch that separates two triangular, laterally sloped, and rounded lobes. The subgenital plate is covered with small, colorless setae. Sternum 9 is pale medially, with two dark brown circular spots mesolaterally (
<figureCitation id="BAFA2A73DB1B7C2AAAD6C054D504B76C" box="[715,783,295,319]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="2" pageNumber="59">Fig. 8</figureCitation>
).
</paragraph>
<caption id="76BE667EDB1B7C2AA88AC602D59AB1B7" httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="2" pageNumber="59" targetBox="[156,1434,379,1855]" targetPageId="2">
<paragraph id="227E36F6DB1B7C2AA88AC602D59AB1B7" blockId="2.[151,1436,1905,2021]" pageId="2" pageNumber="59">
<emphasis id="10B5EAE4DB1B7C2AA88AC602D731B1D4" bold="true" box="[151,314,1905,1928]" pageId="2" pageNumber="59">FIGURES 1–8.</emphasis>
<taxonomicName id="E5C14D75DB1B7C2AA95DC600D437B1DB" box="[320,572,1907,1928]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="2" pageNumber="59" phylum="Arthropoda" rank="species" species="angarensis" status="sp. nov.">
<emphasis id="10B5EAE4DB1B7C2AA95DC600D437B1DB" box="[320,572,1907,1928]" italics="true" pageId="2" pageNumber="59">Arcynopteryx angarensis</emphasis>
</taxonomicName>
<emphasis id="10B5EAE4DB1B7C2AAA5EC601D477B1D4" bold="true" box="[579,636,1906,1927]" pageId="2" pageNumber="59">
<taxonomicNameLabel id="0B86579FDB1B7C2AAA5EC601D477B1D4" box="[579,636,1906,1927]" pageId="2" pageNumber="59" rank="species">sp. n.</taxonomicNameLabel>
</emphasis>
: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4–7 = 1.0.
</paragraph>
</caption>
<caption id="76BE667EDB1A7C2BA88AC53FD24BB2D2" httpUri="https://zenodo.org/record/210469/files/figure.png" pageId="3" pageNumber="60" targetBox="[151,1436,194,1083]" targetPageId="3">
<paragraph id="227E36F6DB1A7C2BA88AC53FD24BB2D2" blockId="3.[151,1437,1100,1153]" pageId="3" pageNumber="60">
<emphasis id="10B5EAE4DB1A7C2BA88AC53FD743B231" bold="true" box="[151,328,1100,1123]" pageId="3" pageNumber="60">FIGURES 9–12.</emphasis>
<taxonomicName id="E5C14D75DB1A7C2BA953C53ED440B230" box="[334,587,1101,1123]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="3" pageNumber="60" phylum="Arthropoda" rank="species" species="angarensis">
<emphasis id="10B5EAE4DB1A7C2BA953C53ED440B230" box="[334,587,1101,1123]" italics="true" pageId="3" pageNumber="60">Arcynopteryx angarensis</emphasis>
</taxonomicName>
, egg: 9. Habitus: anchor, chorion structure, lateral. 10. Collar and shoulder, lateral. 11. Chorion structure with micropile row, dorsal. 12. Micropylar orifice and lip, dorsal view.
</paragraph>
</caption>
<paragraph id="227E36F6DB1A7C2BA8D4C5CFD322B3D4" blockId="3.[151,1436,1211,2028]" pageId="3" pageNumber="60">
<emphasis id="10B5EAE4DB1A7C2BA8D4C5CFD6F3B287" bold="true" box="[201,248,1212,1236]" pageId="3" pageNumber="60">Egg</emphasis>
oval, circular in cross-section (
<figureCitation id="BAFA2A73DB1A7C2BAA48C5C8D493B280" box="[597,664,1211,1235]" captionStart="FIGURES 9 – 12" captionStartId="3.[151,264,1100,1123]" captionTargetBox="[151,1436,194,1083]" captionTargetId="figure@3.[151,1436,193,1097]" captionTargetPageId="3" captionText="FIGURES 9 – 12. Arcynopteryx angarensis, egg: 9. Habitus: anchor, chorion structure, lateral. 10. Collar and shoulder, lateral. 11. Chorion structure with micropile row, dorsal. 12. Micropylar orifice and lip, dorsal view." httpUri="https://zenodo.org/record/210469/files/figure.png" pageId="3" pageNumber="60">Fig. 9</figureCitation>
), 303−345 x 230−255 µm. The mushroom-shaped anchor covers the collar completely (
<figureCitation id="BAFA2A73DB1A7C2BA971C5ACD7B9B2A4" box="[364,434,1247,1271]" captionStart="FIGURES 9 – 12" captionStartId="3.[151,264,1100,1123]" captionTargetBox="[151,1436,194,1083]" captionTargetId="figure@3.[151,1436,193,1097]" captionTargetPageId="3" captionText="FIGURES 9 – 12. Arcynopteryx angarensis, egg: 9. Habitus: anchor, chorion structure, lateral. 10. Collar and shoulder, lateral. 11. Chorion structure with micropile row, dorsal. 12. Micropylar orifice and lip, dorsal view." httpUri="https://zenodo.org/record/210469/files/figure.png" pageId="3" pageNumber="60">Fig. 9</figureCitation>
). The collar sits on a flattened, shelf-like area surrounded by a basal ring (
<figureCitation id="BAFA2A73DB1A7C2BAD1BC5ACD350B2A4" box="[1286,1371,1247,1271]" captionStart="FIGURES 9 – 12" captionStartId="3.[151,264,1100,1123]" captionTargetBox="[151,1436,194,1083]" captionTargetId="figure@3.[151,1436,193,1097]" captionTargetPageId="3" captionText="FIGURES 9 – 12. Arcynopteryx angarensis, egg: 9. Habitus: anchor, chorion structure, lateral. 10. Collar and shoulder, lateral. 11. Chorion structure with micropile row, dorsal. 12. Micropylar orifice and lip, dorsal view." httpUri="https://zenodo.org/record/210469/files/figure.png" pageId="3" pageNumber="60">Fig. 10</figureCitation>
). The collar is stalked, its rim flanged and fairly regularly incised, with low shoulder (
<figureCitation id="BAFA2A73DB1A7C2BAC36C470D28BB348" box="[1067,1152,1283,1307]" captionStart="FIGURES 9 – 12" captionStartId="3.[151,264,1100,1123]" captionTargetBox="[151,1436,194,1083]" captionTargetId="figure@3.[151,1436,193,1097]" captionTargetPageId="3" captionText="FIGURES 9 – 12. Arcynopteryx angarensis, egg: 9. Habitus: anchor, chorion structure, lateral. 10. Collar and shoulder, lateral. 11. Chorion structure with micropile row, dorsal. 12. Micropylar orifice and lip, dorsal view." httpUri="https://zenodo.org/record/210469/files/figure.png" pageId="3" pageNumber="60">Fig. 10</figureCitation>
). The chorion is covered with hexagonal FCIs (
<figureCitation id="BAFA2A73DB1A7C2BA988C454D421B36C" box="[405,554,1319,1343]" captionStart="FIGURES 9 – 12" captionStartId="3.[151,264,1100,1123]" captionTargetBox="[151,1436,194,1083]" captionTargetId="figure@3.[151,1436,193,1097]" captionTargetPageId="3" captionText="FIGURES 9 – 12. Arcynopteryx angarensis, egg: 9. Habitus: anchor, chorion structure, lateral. 10. Collar and shoulder, lateral. 11. Chorion structure with micropile row, dorsal. 12. Micropylar orifice and lip, dorsal view." httpUri="https://zenodo.org/record/210469/files/figure.png" pageId="3" pageNumber="60">Figs. 9 &amp; 11</figureCitation>
). The FCIs are delimited by shallow punctate walls. Their punctures are less deep than the 7-8 punctations that often occur on the flat floors of the FCIs (
<figureCitation id="BAFA2A73DB1A7C2BABFAC438D232B330" box="[999,1081,1355,1379]" captionStart="FIGURES 9 – 12" captionStartId="3.[151,264,1100,1123]" captionTargetBox="[151,1436,194,1083]" captionTargetId="figure@3.[151,1436,193,1097]" captionTargetPageId="3" captionText="FIGURES 9 – 12. Arcynopteryx angarensis, egg: 9. Habitus: anchor, chorion structure, lateral. 10. Collar and shoulder, lateral. 11. Chorion structure with micropile row, dorsal. 12. Micropylar orifice and lip, dorsal view." httpUri="https://zenodo.org/record/210469/files/figure.png" pageId="3" pageNumber="60">Fig. 11</figureCitation>
). The row of micropyles is subequatorial; orifices are small and lipped, without micropylar mounds (
<figureCitation id="BAFA2A73DB1A7C2BABBAC41CD5F0B3D4" box="[935,1019,1391,1415]" captionStart="FIGURES 9 – 12" captionStartId="3.[151,264,1100,1123]" captionTargetBox="[151,1436,194,1083]" captionTargetId="figure@3.[151,1436,193,1097]" captionTargetPageId="3" captionText="FIGURES 9 – 12. Arcynopteryx angarensis, egg: 9. Habitus: anchor, chorion structure, lateral. 10. Collar and shoulder, lateral. 11. Chorion structure with micropile row, dorsal. 12. Micropylar orifice and lip, dorsal view." httpUri="https://zenodo.org/record/210469/files/figure.png" pageId="3" pageNumber="60">Fig. 12</figureCitation>
). There is no eclosion line.
</paragraph>
</subSubSection>
<subSubSection id="6ADB657DDB1A7C2BA8D4C4E0D4B2B068" pageId="3" pageNumber="60" type="materials_examined">
<paragraph id="227E36F6DB1A7C2BA8D4C4E0D4B2B068" blockId="3.[151,1436,1211,2028]" pageId="3" pageNumber="60">
<emphasis id="10B5EAE4DB1A7C2BA8D4C4E0D7B9B3FF" bold="true" box="[201,434,1427,1452]" pageId="3" pageNumber="60">Material examined.</emphasis>
<typeStatus id="FD7A8854DB1A7C2BA9A5C4E0D428B3F8" box="[440,547,1427,1451]" pageId="3" pageNumber="60" type="holotype">Holotype</typeStatus>
, male. 
<collectingCountry id="5AD67666DB1A7C2BAA6EC4E0D4CAB3F8" box="[627,705,1427,1451]" name="Russia" pageId="3" pageNumber="60">Russia</collectingCountry>
. Angara River, vicinity of Mikhalevo settlement, Irk. (utskaya) g. (uberniya) (
<geoCoordinate id="47F55031DB1A7C2BA906C4C4D780B39C" box="[283,395,1463,1487]" direction="north" orientation="latitude" pageId="3" pageNumber="60" precision="9" value="52.068333">52º4.10'N</geoCoordinate>
<geoCoordinate id="47F55031DB1A7C2BA98EC4C4D41BB39C" box="[403,528,1463,1487]" direction="east" orientation="longitude" pageId="3" pageNumber="60" precision="9" value="4.4418335">04º26.51'E</geoCoordinate>
), 7.06.1925, coll. Vereshchagin. 
<typeStatus id="FD7A8854DB1A7C2BAB9DC4CBD5FAB383" box="[896,1009,1464,1488]" pageId="3" pageNumber="60" type="paratype">Paratypes</typeStatus>
: 
<specimenCount id="34C7FD7FDB1A7C2BABE0C4C4D25DB39C" box="[1021,1110,1463,1487]" pageId="3" pageNumber="60" type="male">5 males</specimenCount>
, 
<specimenCount id="34C7FD7FDB1A7C2BAC7FC4C4D2D9B39C" box="[1122,1234,1463,1487]" pageId="3" pageNumber="60" type="female">2 females</specimenCount>
, the same locality as 
<typeStatus id="FD7A8854DB1A7C2BA8ABC4A8D717B3A0" box="[182,284,1499,1523]" pageId="3" pageNumber="60" type="holotype">holotype</typeStatus>
; 
<specimenCount id="34C7FD7FDB1A7C2BA935C4A8D774B3A0" box="[296,383,1499,1523]" pageId="3" pageNumber="60" type="male">4 males</specimenCount>
and 
<specimenCount id="34C7FD7FDB1A7C2BA9A5C4A8D423B3A0" box="[440,552,1499,1523]" pageId="3" pageNumber="60" type="female">3 females</specimenCount>
, at the source of Angara River, 
<date id="567F1036DB1A7C2BAB8FC4A8D219B3A0" box="[914,1042,1499,1523]" pageId="3" pageNumber="60" value="1930-11-07">11.07.1930</date>
, coll. P. Rezvov (alcohol); 
<specimenCount id="34C7FD7FDB1A7C2BAD59C4A8D390B3A0" box="[1348,1435,1499,1523]" pageId="3" pageNumber="60" type="male">9 males</specimenCount>
and 
<specimenCount id="34C7FD7FDB1A7C2BA8DBC773D73FB044" box="[198,308,1535,1559]" pageId="3" pageNumber="60" type="female">7 females</specimenCount>
, Irkut. (skaya) g. (uberniya) and u. (ezd) Angara isls. (islands) between Pashkovo and Mikhalevo settlements, 
<date id="567F1036DB1A7C2BA919C750D78EB068" box="[260,389,1571,1595]" pageId="3" pageNumber="60" value="1924-06-20">20.06.1924</date>
, coll. Vinogradov (pinned).
</paragraph>
</subSubSection>
<subSubSection id="6ADB657DDB1A7C2BA8D4C73BD788B0D0" pageId="3" pageNumber="60" type="etymology">
<paragraph id="227E36F6DB1A7C2BA8D4C73BD788B0D0" blockId="3.[151,1436,1211,2028]" pageId="3" pageNumber="60">
<emphasis id="10B5EAE4DB1A7C2BA8D4C73BD744B033" bold="true" box="[201,335,1608,1632]" pageId="3" pageNumber="60">Etymology.</emphasis>
The name refers to the 
<typeStatus id="FD7A8854DB1A7C2BAA7EC73BD498B033" box="[611,659,1608,1632]" pageId="3" pageNumber="60">type</typeStatus>
locality, the beautiful Angara River (Lake Baikal Basin), where the 
<typeStatus id="FD7A8854DB1A7C2BA88AC71FD6D9B0D7" box="[151,210,1644,1668]" pageId="3" pageNumber="60">types</typeStatus>
were collected.
</paragraph>
</subSubSection>
<subSubSection id="6ADB657DDB1A7C2BA8D4C7FCD295B140" pageId="3" pageNumber="60" type="distribution">
<paragraph id="227E36F6DB1A7C2BA8D4C7FCD295B140" blockId="3.[151,1436,1211,2028]" pageId="3" pageNumber="60">
<emphasis id="10B5EAE4DB1A7C2BA8D4C7FCD769B0FB" bold="true" box="[201,354,1679,1704]" pageId="3" pageNumber="60">Distribution.</emphasis>
The species is known from the source of Angara River, the river which outflows from the deep and ancient Baikal Lake, situated in the southern part of Eastern Siberia within the Republic of Buryatiya and ‘Irkutsk oblast’ of 
<collectingCountry id="5AD67666DB1A7C2BA974C7A4D7BCB0BC" box="[361,439,1751,1775]" name="Russia" pageId="3" pageNumber="60">Russia</collectingCountry>
. 
<taxonomicName id="E5C14D75DB1A7C2BA9DCC7A4D4D3B0BC" box="[449,728,1751,1775]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="3" pageNumber="60" phylum="Arthropoda" rank="species" species="angarensis">
<emphasis id="10B5EAE4DB1A7C2BA9DCC7A4D4D3B0BC" box="[449,728,1751,1775]" italics="true" pageId="3" pageNumber="60">Arcynopteryx angarensis</emphasis>
</taxonomicName>
is considered a rare species, with a local area of distribution in the source of the Angara River. No specimens are known to have been collected since 1930.
</paragraph>
</subSubSection>
<subSubSection id="6ADB657DDB1A7C2CA8D4C66CD5A5B52C" lastPageId="4" lastPageNumber="61" pageId="3" pageNumber="60" type="diagnosis">
<paragraph id="227E36F6DB1A7C2CA8D4C66CD5A5B52C" blockId="3.[151,1436,1211,2028]" lastBlockId="4.[151,1436,151,897]" lastPageId="4" lastPageNumber="61" pageId="3" pageNumber="60">
<emphasis id="10B5EAE4DB1A7C2BA8D4C66CD748B16B" bold="true" box="[201,323,1823,1848]" pageId="3" pageNumber="60">Diagnosis.</emphasis>
<taxonomicName id="E5C14D75DB1A7C2BA957C66CD46AB164" box="[330,609,1823,1847]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="3" pageNumber="60" phylum="Arthropoda" rank="species" species="angarensis">
<emphasis id="10B5EAE4DB1A7C2BA957C66CD46AB164" box="[330,609,1823,1847]" italics="true" pageId="3" pageNumber="60">Arcynopteryx angarensis</emphasis>
</taxonomicName>
can be readily separated from the other four described 
<taxonomicName id="E5C14D75DB1A7C2BACCDC66CD36DB164" box="[1232,1382,1823,1847]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="3" pageNumber="60" phylum="Arthropoda" rank="genus">
<emphasis id="10B5EAE4DB1A7C2BACCDC66CD36DB164" box="[1232,1382,1823,1847]" italics="true" pageId="3" pageNumber="60">Arcynopteryx</emphasis>
</taxonomicName>
species by the shape of the aedeagus, lateral sclerotized bands in the cowl, and the hemitergal lobes. In particular, the tear-shaped knob on the top of each male hemitergal lobe (
<figureCitation id="BAFA2A73DB1A7C2BAB3EC614D586B12C" box="[803,909,1895,1919]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="3" pageNumber="60">Figs. 3–6</figureCitation>
) is distinctive. The male hemitergal lobes of 
<taxonomicName id="E5C14D75DB1A7C2BAD99C614D6EDB1F7" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="3" pageNumber="60" phylum="Arthropoda" rank="species" species="polaris">
<emphasis id="10B5EAE4DB1A7C2BAD99C614D6EDB1F7" italics="true" pageId="3" pageNumber="60">A. polaris</emphasis>
</taxonomicName>
and 
<taxonomicName id="E5C14D75DB1A7C2BA901C6FFD7A6B1F7" box="[284,429,1932,1956]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="3" pageNumber="60" phylum="Arthropoda" rank="species" species="amurensis">
<emphasis id="10B5EAE4DB1A7C2BA901C6FFD7A6B1F7" box="[284,429,1932,1956]" italics="true" pageId="3" pageNumber="60">A. amurensis</emphasis>
</taxonomicName>
are simple, without knobs (
<bibRefCitation id="46504B07DB1A7C2BAAFEC6F8D260B1F0" author="Teslenko" box="[739,1131,1931,1955]" pageId="3" pageNumber="60" refString="Teslenko, V. (2012) A taxonomic revision of the genus Arcynopteryx Klapalek, 1904 (Plecoptera, Perlodidae). Zootaxa, 3329, 1 - 18." type="journal article" year="2012">Teslenko 2012, figs. 14, 16, 23, 26</bibRefCitation>
). The male hemitergal lobe of 
<taxonomicName id="E5C14D75DB1A7C2BA8A5C6DCD745B194" box="[184,334,1967,1991]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="3" pageNumber="60" phylum="Arthropoda" rank="species" species="sajanensis">
<emphasis id="10B5EAE4DB1A7C2BA8A5C6DCD745B194" box="[184,334,1967,1991]" italics="true" pageId="3" pageNumber="60">A. sajanensis</emphasis>
</taxonomicName>
is short, bears a small rectangular projection on the inner mesal edge, and short, rounded knob (
<bibRefCitation id="46504B07DB1A7C2BA883C6A0D7DCB1B8" author="Teslenko" box="[158,471,2003,2027]" pageId="3" pageNumber="60" refString="Teslenko, V. (2012) A taxonomic revision of the genus Arcynopteryx Klapalek, 1904 (Plecoptera, Perlodidae). Zootaxa, 3329, 1 - 18." type="journal article" year="2012">Teslenko 2012, figs. 31, 32</bibRefCitation>
). The hemitergal lobes of 
<taxonomicName id="E5C14D75DB1A7C2BAB1DC6A7D57DB1BF" box="[768,886,2004,2028]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="3" pageNumber="60" phylum="Arthropoda" rank="species" species="dichroa">
<emphasis id="10B5EAE4DB1A7C2BAB1DC6A7D57DB1BF" box="[768,886,2004,2028]" italics="true" pageId="3" pageNumber="60">A. dichroa</emphasis>
</taxonomicName>
are wide, with lobed apices, apical margins prolonged and rounded, well sclerotized; the lobes are in contact mesoanteriorly; each hemitergal lobe bearing an erect knob close to the anterior hemitergal margin (
<bibRefCitation id="46504B07DB1D7C2CAA8EC1CFD59FB687" author="Stark" box="[659,916,188,212]" pageId="4" pageNumber="61" refString="Stark, B. P. &amp; Szczytko, S. W. (1988) Egg morphology and phylogeny in Arcynopterygini (Plecoptera: Perlodidae). Journal of the Kansas Entomological Society, 61, 143 - 160." type="journal article" year="1988">Stark &amp; Szczytko1988</bibRefCitation>
, 
<bibRefCitation id="46504B07DB1D7C2CAB82C1CFD268B687" author="Kondratieff" box="[927,1123,188,212]" pageId="4" pageNumber="61" refString="Kondratieff, B. C. (2004) Perlodidae-Perlodinae (The Springflies). In: Stark B. S. &amp; Armitage B. J. (Eds.), Stoneflies (Plecoptera) of eastern North America. Vo l. 2. Chloroperlidae, Perlidae, and Perlodidae (Perlodinae). Ohio Biological Survey, pp. 149 - 180." type="journal article" year="2004">Kondratieff 2004</bibRefCitation>
, 
<bibRefCitation id="46504B07DB1D7C2CAC70C1CFD318B687" author="Teslenko" box="[1133,1299,188,212]" pageId="4" pageNumber="61" refString="Teslenko, V. (2012) A taxonomic revision of the genus Arcynopteryx Klapalek, 1904 (Plecoptera, Perlodidae). Zootaxa, 3329, 1 - 18." type="journal article" year="2012">Teslenko 2012</bibRefCitation>
, figs. 2, 3 &amp; 5). 
<taxonomicName id="E5C14D75DB1D7C2CA8A1C193D7DFB6AB" box="[188,468,224,248]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="angarensis">
<emphasis id="10B5EAE4DB1D7C2CA8A1C193D7DFB6AB" box="[188,468,224,248]" italics="true" pageId="4" pageNumber="61">Arcynopteryx angarensis</emphasis>
</taxonomicName>
males are similar to those of 
<taxonomicName id="E5C14D75DB1D7C2CAB3DC193D5B9B6AB" box="[800,946,224,248]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="amurensis">
<emphasis id="10B5EAE4DB1D7C2CAB3DC193D5B9B6AB" box="[800,946,224,248]" italics="true" pageId="4" pageNumber="61">A. amurensis</emphasis>
</taxonomicName>
, 
<emphasis id="10B5EAE4DB1D7C2CABDDC193D23DB6AB" box="[960,1078,224,248]" italics="true" pageId="4" pageNumber="61">
<taxonomicName id="E5C14D75DB1D7C2CABDDC193D23AB6AB" box="[960,1073,224,248]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="polaris">A. polaris</taxonomicName>
,
</emphasis>
and 
<taxonomicName id="E5C14D75DB1D7C2CAC70C193D30AB6AB" box="[1133,1281,224,248]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="sajanensis">
<emphasis id="10B5EAE4DB1D7C2CAC70C193D30AB6AB" box="[1133,1281,224,248]" italics="true" pageId="4" pageNumber="61">A. sajanensis</emphasis>
</taxonomicName>
, with the stylet of the epiproct directed upward, backward and downward (
<figureCitation id="BAFA2A73DB1D7C2CAB9FC077D218B74F" box="[898,1043,260,284]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="4" pageNumber="61">Figs. 3 &amp; 6</figureCitation>
) (
<bibRefCitation id="46504B07DB1D7C2CAC2DC077D393B74F" author="Zhiltzova" box="[1072,1432,260,284]" pageId="4" pageNumber="61" refString="Zhiltzova, L. &amp; Levanidova, I. (1978) New species of stoneflies (Plecoptera) from Far East. Trudy Zoologicheskogo instituta AN USSR, 61, 3 - 29 (in Russian)." type="journal article" year="1978">Zhiltzova &amp; Levanidova 1978</bibRefCitation>
, 
<bibRefCitation id="46504B07DB1D7C2CA88AC054D734B76C" author="Klapalek" box="[151,319,295,319]" pageId="4" pageNumber="61" refString="Klapalek, F. (1912) Plecopteres I. Fam. Perlodidae. Collections Zoologiques du Baron Edmond de Selys-Longchamps. Bruxelles, 4, 1 - 66." type="journal article" year="1912">Klapálek 1912</bibRefCitation>
, 
<bibRefCitation id="46504B07DB1D7C2CA951C054D45EB76C" author="Zapekina-Dulkeit" box="[332,597,295,319]" pageId="4" pageNumber="61" refString="Zapekina-Dulkeit, J. (1960) Three new species of Plecoptera in the mountain Altai and Sayan Mountains. Revue d'Entomologie de I'URSS, 39, 666 - 670 (in Russian)." type="journal article" year="1960">Zapekina-Dulkeit 1960</bibRefCitation>
). The top of the stylet of the epiproct in 
<taxonomicName id="E5C14D75DB1D7C2CAC38C05BD290B713" box="[1061,1179,296,320]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="dichroa">
<emphasis id="10B5EAE4DB1D7C2CAC38C05BD290B713" box="[1061,1179,296,320]" italics="true" pageId="4" pageNumber="61">A. dichroa</emphasis>
</taxonomicName>
is directed upward, or upward and forward, with a direction very different from that of the other 
<taxonomicName id="E5C14D75DB1D7C2CABF8C03FD270B737" box="[997,1147,332,356]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="genus">
<emphasis id="10B5EAE4DB1D7C2CABF8C03FD270B737" box="[997,1147,332,356]" italics="true" pageId="4" pageNumber="61">Arcynopteryx</emphasis>
</taxonomicName>
species. The female subgenital plate of 
<taxonomicName id="E5C14D75DB1D7C2CA959C003D7D6B7DB" box="[324,477,368,392]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="angarensis">
<emphasis id="10B5EAE4DB1D7C2CA959C003D7D6B7DB" box="[324,477,368,392]" italics="true" pageId="4" pageNumber="61">A. angarensis</emphasis>
</taxonomicName>
is distinguished from other 
<taxonomicName id="E5C14D75DB1D7C2CAB08C003D5A0B7DB" box="[789,939,368,392]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="genus">
<emphasis id="10B5EAE4DB1D7C2CAB08C003D5A0B7DB" box="[789,939,368,392]" italics="true" pageId="4" pageNumber="61">Arcynopteryx</emphasis>
</taxonomicName>
species by the deep notch that separates two triangular, sloped laterally, apically rounded lobes (
<figureCitation id="BAFA2A73DB1D7C2CAAC4C0E7D515B7FF" box="[729,798,404,428]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="4" pageNumber="61">Fig. 8</figureCitation>
). The shape of the subgenital plate of 
<taxonomicName id="E5C14D75DB1D7C2CACD2C0E7D34EB7FF" box="[1231,1349,404,428]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="dichroa">
<emphasis id="10B5EAE4DB1D7C2CACD2C0E7D34EB7FF" box="[1231,1349,404,428]" italics="true" pageId="4" pageNumber="61">A. dichroa</emphasis>
</taxonomicName>
is variable, but the posterior margin of the plate has a shallow notch that separates two small lobes, or two shallow notches with three lobes. The posterior margin of the 
<taxonomicName id="E5C14D75DB1D7C2CAB1DC0AFD57AB7A7" box="[768,881,476,500]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="polaris">
<emphasis id="10B5EAE4DB1D7C2CAB1DC0AFD57AB7A7" box="[768,881,476,500]" italics="true" pageId="4" pageNumber="61">A. polaris</emphasis>
</taxonomicName>
subgenital plate is straight or exhibits a shallow notch that separates two triangular, short, sloped laterally, and rounded lobes. The subgenital plates of 
<taxonomicName id="E5C14D75DB1D7C2CAD16C373D397B44B" box="[1291,1436,512,536]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="amurensis">
<emphasis id="10B5EAE4DB1D7C2CAD16C373D397B44B" box="[1291,1436,512,536]" italics="true" pageId="4" pageNumber="61">A. amurensis</emphasis>
</taxonomicName>
and 
<taxonomicName id="E5C14D75DB1D7C2CA8DBC357D751B46F" box="[198,346,548,572]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="sajanensis">
<emphasis id="10B5EAE4DB1D7C2CA8DBC357D751B46F" box="[198,346,548,572]" italics="true" pageId="4" pageNumber="61">A. sajanensis</emphasis>
</taxonomicName>
are very specific, however their posterior margin is medially smooth (
<bibRefCitation id="46504B07DB1D7C2CAC6DC357D314B46F" author="Zhiltzova" box="[1136,1311,548,572]" pageId="4" pageNumber="61" refString="Zhiltzova, L. &amp; Levanidova, I. (1978) New species of stoneflies (Plecoptera) from Far East. Trudy Zoologicheskogo instituta AN USSR, 61, 3 - 29 (in Russian)." type="journal article" year="1978">Zhiltzova 1978</bibRefCitation>
, Zapekina- 
<bibRefCitation id="46504B07DB1D7C2CA88AC334D724B40C" author="Dulkeit" box="[151,303,583,607]" pageId="4" pageNumber="61" refString="Zapekina-Dulkeit, J. (1960) Three new species of Plecoptera in the mountain Altai and Sayan Mountains. Revue d'Entomologie de I'URSS, 39, 666 - 670 (in Russian)." type="journal article" year="1960">Dulkeit 1960</bibRefCitation>
). The eggs of 
<taxonomicName id="E5C14D75DB1D7C2CA9CDC33BD461B433" box="[464,618,584,608]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="angarensis">
<emphasis id="10B5EAE4DB1D7C2CA9CDC33BD461B433" box="[464,618,584,608]" italics="true" pageId="4" pageNumber="61">A. angarensis</emphasis>
</taxonomicName>
differ from those illustrated for 
<emphasis id="10B5EAE4DB1D7C2CABCAC33BD2E5B433" box="[983,1262,584,608]" italics="true" pageId="4" pageNumber="61">
<taxonomicName id="E5C14D75DB1D7C2CABCAC33BD267B433" box="[983,1132,584,608]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="amurensis">A. amurensis</taxonomicName>
, 
<taxonomicName id="E5C14D75DB1D7C2CAC65C33BD2E5B433" box="[1144,1262,584,608]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="dichroa">A. dichroa</taxonomicName>
</emphasis>
, 
<taxonomicName id="E5C14D75DB1D7C2CACE1C33BD367B433" box="[1276,1388,584,608]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="polaris">
<emphasis id="10B5EAE4DB1D7C2CACE1C33BD367B433" box="[1276,1388,584,608]" italics="true" pageId="4" pageNumber="61">A. polaris</emphasis>
</taxonomicName>
and 
<taxonomicName id="E5C14D75DB1D7C2CA88AC31FD722B4D7" box="[151,297,620,644]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="sajanensis">
<emphasis id="10B5EAE4DB1D7C2CA88AC31FD722B4D7" box="[151,297,620,644]" italics="true" pageId="4" pageNumber="61">A. sajanensis</emphasis>
</taxonomicName>
(
<bibRefCitation id="46504B07DB1D7C2CA925C31FD434B4D7" author="Stark" box="[312,575,620,644]" pageId="4" pageNumber="61" refString="Stark, B. P. &amp; Szczytko, S. W. (1988) Egg morphology and phylogeny in Arcynopterygini (Plecoptera: Perlodidae). Journal of the Kansas Entomological Society, 61, 143 - 160." type="journal article" year="1988">Stark &amp; Szczytko 1988</bibRefCitation>
, 
<bibRefCitation id="46504B07DB1D7C2CAA57C31FD4E4B4D7" author="Teslenko" box="[586,751,620,644]" pageId="4" pageNumber="61" refString="Teslenko, V. (2012) A taxonomic revision of the genus Arcynopteryx Klapalek, 1904 (Plecoptera, Perlodidae). Zootaxa, 3329, 1 - 18." type="journal article" year="2012">Teslenko 2012</bibRefCitation>
) by the very short collar and the number of punctations in the flat floors. The egg of 
<taxonomicName id="E5C14D75DB1D7C2CA98CC3E3D421B4FB" box="[401,554,656,680]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="angarensis">
<emphasis id="10B5EAE4DB1D7C2CA98CC3E3D421B4FB" box="[401,554,656,680]" italics="true" pageId="4" pageNumber="61">A. angarensis</emphasis>
</taxonomicName>
is reminiscent of the egg of 
<taxonomicName id="E5C14D75DB1D7C2CAB7AC3E3D5DDB4FB" box="[871,982,656,680]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="polaris">
<emphasis id="10B5EAE4DB1D7C2CAB7AC3E3D5DDB4FB" box="[871,982,656,680]" italics="true" pageId="4" pageNumber="61">A. polaris</emphasis>
</taxonomicName>
in similar shape, size, and irregular hexagonal FCI’s on the chorion surface, but differ in depth of punctations on the FCI walls and flat floors. The FCI walls of 
<taxonomicName id="E5C14D75DB1D7C2CA8E6C3ABD760B4A3" box="[251,363,728,752]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="polaris">
<emphasis id="10B5EAE4DB1D7C2CA8E6C3ABD760B4A3" box="[251,363,728,752]" italics="true" pageId="4" pageNumber="61">A. polaris</emphasis>
</taxonomicName>
are raised with thin, deep furrows; the flat floors often contain 7–13 punctations, of the same depth as punctures on the walls. The punctations on the flat floors of 
<taxonomicName id="E5C14D75DB1D7C2CABA8C38FD25BB547" box="[949,1104,764,788]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="angarensis">
<emphasis id="10B5EAE4DB1D7C2CABA8C38FD25BB547" box="[949,1104,764,788]" italics="true" pageId="4" pageNumber="61">A. angarensis</emphasis>
</taxonomicName>
are deeper than those on the walls (
<figureCitation id="BAFA2A73DB1D7C2CA8FCC26CD739B564" box="[225,306,799,823]" captionStart="FIGURES 9 – 12" captionStartId="3.[151,264,1100,1123]" captionTargetBox="[151,1436,194,1083]" captionTargetId="figure@3.[151,1436,193,1097]" captionTargetPageId="3" captionText="FIGURES 9 – 12. Arcynopteryx angarensis, egg: 9. Habitus: anchor, chorion structure, lateral. 10. Collar and shoulder, lateral. 11. Chorion structure with micropile row, dorsal. 12. Micropylar orifice and lip, dorsal view." httpUri="https://zenodo.org/record/210469/files/figure.png" pageId="4" pageNumber="61">Fig. 11</figureCitation>
). Flat floors often contain 7–8 punctations. 
<taxonomicName id="E5C14D75DB1D7C2CAB01C253D239B56B" box="[796,1074,800,824]" class="Insecta" family="Perlodidae" genus="Arcynopteryx" kingdom="Animalia" order="Plecoptera" pageId="4" pageNumber="61" phylum="Arthropoda" rank="species" species="angarensis">
<emphasis id="10B5EAE4DB1D7C2CAB01C253D239B56B" box="[796,1074,800,824]" italics="true" pageId="4" pageNumber="61">Arcynopteryx angarensis</emphasis>
</taxonomicName>
is distinguished also by the pigment pattern on the head; especially by two oblique, brown bands with a curlicue at the apex that extend along the epicranial suture towards but not reaching the compound eyes (
<figureCitation id="BAFA2A73DB1D7C2CAB41C214D596B52C" box="[860,925,871,895]" captionStart="FIGURES 1 – 8" captionStartId="2.[151,264,1905,1928]" captionTargetBox="[156,1434,379,1855]" captionTargetId="figure@2.[151,1436,373,1885]" captionTargetPageId="2" captionText="FIGURES 1 – 8. Arcynopteryx angarensis sp. n.: 1. Head and pronotum of male. 2. Wings of male. 3. Male abdominal tip, dorsal. 4. Right hemitergal lobe, dorsal. 5. Hemitergal lobe and cowl: sclerites of the internal basal anchor, lever arm, paragenital plate, stylet and loop of the epiproct, and two lateral sclerotized bands, lateral. 6. Male abdominal tip with aedeagus, lateral. 7. Aedeagus, dorsal. 8. Female abdominal tip, ventral. Scale (mm): 4 – 7 = 1.0." httpUri="https://zenodo.org/record/210468/files/figure.png" pageId="4" pageNumber="61">Fig. 1</figureCitation>
).
</paragraph>
</subSubSection>
</treatment>
</document>