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<document ID-DOI="http://dx.doi.org/10.3897/zookeys.898.47118" ID-GBIF-Dataset="6a9aaa1b-b903-4472-865d-7edce422a2dc" ID-PMC="PMC6917629" ID-Pensoft-Pub="1313-2970-898-1" ID-Pensoft-UUID="278CAE686DE65920AF5B0FE8BA1BBDC1" ID-PubMed="31866732" ID-ZooBank="7B407C809E644F5995C2B3229CF78C6B" ModsDocID="1313-2970-898-1" checkinTime="1575997091264" checkinUser="pensoft" docAuthor="Godunko, Roman J., Neumann, Christian &amp; Staniczek, Arnold H." docDate="2019" docId="B80DCBA37FCD52A9A005BA5913ADDA0E" docLanguage="en" docName="ZooKeys 898: 1-26" docOrigin="ZooKeys 898" docSource="http://dx.doi.org/10.3897/zookeys.898.47118" docTitle="Siphloplecton sp. 5" docType="treatment" docVersion="4" id="278CAE686DE65920AF5B0FE8BA1BBDC1" lastPageNumber="1" masterDocId="278CAE686DE65920AF5B0FE8BA1BBDC1" masterDocTitle="Revision of fossil Metretopodidae (Insecta, Ephemeroptera) in Baltic amber - Part 4: Description of two new species of Siphloplecton Clemens, 1915, with notes on the new S. jaegeri species group and with key to fossil male adults of Siphloplecton" masterLastPageNumber="26" masterPageNumber="1" pageNumber="1" updateTime="1668168222060" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Revision of fossil Metretopodidae (Insecta, Ephemeroptera) in Baltic amber - Part 4: Description of two new species of Siphloplecton Clemens, 1915, with notes on the new S. jaegeri species group and with key to fossil male adults of Siphloplecton</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Godunko, Roman J.</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Neumann, Christian</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Staniczek, Arnold H.</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>ZooKeys</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2019</mods:date>
<mods:detail type="volume">
<mods:number>898</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>1</mods:start>
<mods:end>26</mods:end>
</mods:extent>
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<mods:location>
<mods:url>http://dx.doi.org/10.3897/zookeys.898.47118</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/zookeys.898.47118</mods:identifier>
<mods:identifier type="Pensoft-Pub">1313-2970-898-1</mods:identifier>
<mods:identifier type="ZooBank">7B407C809E644F5995C2B3229CF78C6B</mods:identifier>
<mods:identifier type="Pensoft-UUID">278CAE686DE65920AF5B0FE8BA1BBDC1</mods:identifier>
</mods:mods>
<treatment ID-GBIF-Taxon="160689322" LSID="urn:lsid:plazi:treatment:B80DCBA37FCD52A9A005BA5913ADDA0E" httpUri="http://treatment.plazi.org/id/B80DCBA37FCD52A9A005BA5913ADDA0E" lastPageNumber="1" pageId="0" pageNumber="1">
<subSubSection pageId="0" pageNumber="1" type="nomenclature">
<paragraph pageId="0" pageNumber="1">
<taxonomicName LSID="B80DCBA3-7FCD-52A9-A005-BA5913ADDA0E" authority="sp. 5" class="Insecta" family="Metretopodidae" genus="Siphloplecton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Siphloplecton" order="Ephemeroptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">Siphloplecton sp. 5</taxonomicName>
<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (photographs) A general dorsal view B general ventral view C head and thorax in dorsal view D head and thorax in ventral view E base of right forewing and hind wing in ventral view F left forewing in ventral view G cubital field of left forewing in ventral view H genitalia in ventral view." figureDoi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure12">Figures 12</figureCitation>
,
<figureCitation captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (line drawing): general dorsal view of body, right forewing, left and right hind wings." figureDoi="10.3897/zookeys.898.47118.figure13" httpUri="https://binary.pensoft.net/fig/363729" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure13">13</figureCitation>
<tableCitation captionStartId="T1" httpUri="http://table.plazi.org/id/23F53EE7FB0FC4D865035A6D181A4855" pageId="0" pageNumber="1" tableUuid="23F53EE7FB0FC4D865035A6D181A4855">; Table 1</tableCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="materials_examined">
<paragraph pageId="0" pageNumber="1">Material examined.</paragraph>
<paragraph pageId="0" pageNumber="1">
Male imago in Baltic amber (Eocene), CCHH, BaB Nr. 1159/5. A generally completely preserved specimen, well visible in dorsoventral aspect in translucent amber (
<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (photographs) A general dorsal view B general ventral view C head and thorax in dorsal view D head and thorax in ventral view E base of right forewing and hind wing in ventral view F left forewing in ventral view G cubital field of left forewing in ventral view H genitalia in ventral view." figureDoi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure12">
Fig. 12
<normalizedToken originalValue="AB">A-B</normalizedToken>
</figureCitation>
). Some resin influxes around specimen. Right foreleg and right cercus lost. Dorsal side of body only with several very small spots of
<normalizedToken originalValue="“Verlumung”">&quot;Verlumung&quot;</normalizedToken>
. Ventral side of head, thorax and, partly, abdominal sterna intensively covered with
<normalizedToken originalValue="“Verlumung”">&quot;Verlumung&quot;</normalizedToken>
. For this reason, some aspects of mesosternum and the shape of the genitalia are poorly visible. One female nonbiting midge (
<taxonomicName lsidName="Pseudoneuroptera" order="Diptera" pageId="0" pageNumber="1" rank="order">Diptera</taxonomicName>
:
<taxonomicName family="Chironomidae" lsidName="" pageId="0" pageNumber="1" rank="family">Chironomidae</taxonomicName>
) is embedded in the same stone.
</paragraph>
<caption doi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" start="Figure 12" startId="F12">
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" pageId="0" pageNumber="1">Figure 12.</emphasis>
<taxonomicName class="Insecta" family="Metretopodidae" genus="Siphloplecton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Siphloplecton" order="Ephemeroptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="1">Siphloplecton</emphasis>
</taxonomicName>
sp. 5, CCHH, BaB 1159/5, male imago (photographs)
<emphasis bold="true" pageId="0" pageNumber="1">A</emphasis>
general dorsal view
<emphasis bold="true" pageId="0" pageNumber="1">B</emphasis>
general ventral view
<emphasis bold="true" pageId="0" pageNumber="1">C</emphasis>
head and thorax in dorsal view
<emphasis bold="true" pageId="0" pageNumber="1">D</emphasis>
head and thorax in ventral view
<emphasis bold="true" pageId="0" pageNumber="1">E</emphasis>
base of right forewing and hind wing in ventral view
<emphasis bold="true" pageId="0" pageNumber="1">F</emphasis>
left forewing in ventral view
<emphasis bold="true" pageId="0" pageNumber="1">G</emphasis>
cubital field of left forewing in ventral view
<emphasis bold="true" pageId="0" pageNumber="1">H</emphasis>
genitalia in ventral view.
</paragraph>
</caption>
<paragraph pageId="0" pageNumber="1">
Relatively pale specimen, yellowish to brown. Wings with artificial, irregular dark spots; distal portions of forewings and right hind wing with distinct concentration of such spots (
<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (photographs) A general dorsal view B general ventral view C head and thorax in dorsal view D head and thorax in ventral view E base of right forewing and hind wing in ventral view F left forewing in ventral view G cubital field of left forewing in ventral view H genitalia in ventral view." figureDoi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure12">Fig. 12E</figureCitation>
). Legs uniformly coloured. For measurements see Table
<tableCitation captionStartId="T1" httpUri="http://table.plazi.org/id/23F53EE7FB0FC4D865035A6D181A4855" pageId="0" pageNumber="1" tableUuid="23F53EE7FB0FC4D865035A6D181A4855">1</tableCitation>
.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="description">
<paragraph pageId="0" pageNumber="1">Description.</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Head</emphasis>
light brown. Eyes large, slightly flattened, pale, dirty yellowish. Several brownish spots on eye surface. Ocelli and antennae of same colouration as head, completely preserved; antennae slightly longer than head (
<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (photographs) A general dorsal view B general ventral view C head and thorax in dorsal view D head and thorax in ventral view E base of right forewing and hind wing in ventral view F left forewing in ventral view G cubital field of left forewing in ventral view H genitalia in ventral view." figureDoi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure12">Fig. 12C, E</figureCitation>
).
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Thorax</emphasis>
with traces of brownish pigmentation on dorsal and ventral sides, brown. Pronotum well preserved. Arrangement of thoracic sutures on dorsal and ventral sides of mesothorax typical for
<taxonomicName class="Insecta" family="Metretopodidae" genus="Siphloplecton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Siphloplecton" order="Ephemeroptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="1">Siphloplecton</emphasis>
</taxonomicName>
(
<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (photographs) A general dorsal view B general ventral view C head and thorax in dorsal view D head and thorax in ventral view E base of right forewing and hind wing in ventral view F left forewing in ventral view G cubital field of left forewing in ventral view H genitalia in ventral view." figureDoi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure12">
Figs 12
<normalizedToken originalValue="CD">C-D</normalizedToken>
</figureCitation>
,
<figureCitation captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (line drawing): general dorsal view of body, right forewing, left and right hind wings." figureDoi="10.3897/zookeys.898.47118.figure13" httpUri="https://binary.pensoft.net/fig/363729" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure13">13</figureCitation>
). Most of head and thorax ventrally covered with
<normalizedToken originalValue="“Verlumung”">&quot;Verlumung&quot;</normalizedToken>
. Lateral aspect of thorax hardly visible.
</paragraph>
<caption doi="10.3897/zookeys.898.47118.figure13" httpUri="https://binary.pensoft.net/fig/363729" pageId="0" pageNumber="1" start="Figure 13" startId="F13">
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" pageId="0" pageNumber="1">Figure 13.</emphasis>
<taxonomicName class="Insecta" family="Metretopodidae" genus="Siphloplecton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Siphloplecton" order="Ephemeroptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="1">Siphloplecton</emphasis>
</taxonomicName>
sp. 5, CCHH, BaB 1159/5, male imago (line drawing): general dorsal view of body, right forewing, left and right hind wings.
</paragraph>
</caption>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Wings</emphasis>
basally translucent, hyaline, with well visible longitudinal and transversal venation. Pterostigmatic area hyaline, opaque, with several anastomosed veins. Cubital field of forewings with well visible pair of intercalary veins connected with CuA, and one additional, well developed vein also directed toward CuA (
<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (photographs) A general dorsal view B general ventral view C head and thorax in dorsal view D head and thorax in ventral view E base of right forewing and hind wing in ventral view F left forewing in ventral view G cubital field of left forewing in ventral view H genitalia in ventral view." figureDoi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure12">
Figs 12
<normalizedToken originalValue="EG">E-G</normalizedToken>
</figureCitation>
,
<figureCitation captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (line drawing): general dorsal view of body, right forewing, left and right hind wings." figureDoi="10.3897/zookeys.898.47118.figure13" httpUri="https://binary.pensoft.net/fig/363729" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure13">13</figureCitation>
). Hind wings with triads RS, MA and MP, 0.36
<normalizedToken originalValue="×">x</normalizedToken>
forewing length; costal process bluntly pointed and small (
<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (photographs) A general dorsal view B general ventral view C head and thorax in dorsal view D head and thorax in ventral view E base of right forewing and hind wing in ventral view F left forewing in ventral view G cubital field of left forewing in ventral view H genitalia in ventral view." figureDoi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure12">Figs 12E</figureCitation>
,
<figureCitation captionStart="Figure 13" captionStartId="F13" captionText="Figure 13. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (line drawing): general dorsal view of body, right forewing, left and right hind wings." figureDoi="10.3897/zookeys.898.47118.figure13" httpUri="https://binary.pensoft.net/fig/363729" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure13">13</figureCitation>
).
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Legs</emphasis>
yellowish to light brown. Several pointed spines at outer margin of foretibia. Characteristics of legs similar to those of other representatives of
<taxonomicName class="Insecta" family="Metretopodidae" genus="Siphloplecton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Siphloplecton" order="Ephemeroptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="1">Siphloplecton</emphasis>
</taxonomicName>
. Measurements of leg segments in Table
<tableCitation captionStartId="T1" httpUri="http://table.plazi.org/id/23F53EE7FB0FC4D865035A6D181A4855" pageId="0" pageNumber="1" tableUuid="23F53EE7FB0FC4D865035A6D181A4855">1</tableCitation>
.
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Abdominal</emphasis>
segments completely preserved; abdominal terga slightly paler than sterna.
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Styliger plate</emphasis>
only partly visible, most of styliger base covered with
<normalizedToken originalValue="“Verlumung”">&quot;Verlumung&quot;</normalizedToken>
. Thus, shape of styliger projections not clearly visible (
<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (photographs) A general dorsal view B general ventral view C head and thorax in dorsal view D head and thorax in ventral view E base of right forewing and hind wing in ventral view F left forewing in ventral view G cubital field of left forewing in ventral view H genitalia in ventral view." figureDoi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure12">Fig. 12H</figureCitation>
). Basal segment of forceps basally not widened, distinctly narrower than adjoining apical part of plate (character well visible only in right clasper); forceps 4-segmented, segment 4 approximately 3.20 times longer than wide; length ratio of segment 3 to segment 4 approximately 1:1 (
<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (photographs) A general dorsal view B general ventral view C head and thorax in dorsal view D head and thorax in ventral view E base of right forewing and hind wing in ventral view F left forewing in ventral view G cubital field of left forewing in ventral view H genitalia in ventral view." figureDoi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure12">Fig. 12H</figureCitation>
).
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Penis</emphasis>
lobes covered with
<normalizedToken originalValue="“Verlumung”">&quot;Verlumung&quot;</normalizedToken>
(especially left lobe); penis lobes elongated, relatively narrow and separated from each other apically; medial sclerite rounded apically; lateral and medial sclerites probably separated on outer side (poorly visible) (
<figureCitation captionStart="Figure 12" captionStartId="F12" captionText="Figure 12. Siphloplecton sp. 5, CCHH, BaB 1159 / 5, male imago (photographs) A general dorsal view B general ventral view C head and thorax in dorsal view D head and thorax in ventral view E base of right forewing and hind wing in ventral view F left forewing in ventral view G cubital field of left forewing in ventral view H genitalia in ventral view." figureDoi="10.3897/zookeys.898.47118.figure12" httpUri="https://binary.pensoft.net/fig/363728" pageId="0" pageNumber="1" tableDoi="10.3897/zookeys.898.47118.figure12">Fig. 12H</figureCitation>
).
</paragraph>
<paragraph pageId="0" pageNumber="1">
<emphasis bold="true" italics="true" pageId="0" pageNumber="1">Paracercus vestigial</emphasis>
, at least 3-segmented; left cercus slightly damaged; right cercus lost.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="1" type="comments">
<paragraph pageId="0" pageNumber="1">Comments.</paragraph>
<paragraph pageId="0" pageNumber="1">
This species is closely related to
<taxonomicName lsidName="S. landolti" pageId="0" pageNumber="1" rank="species" species="landolti">
<emphasis italics="true" pageId="0" pageNumber="1">S. landolti</emphasis>
</taxonomicName>
sp. nov. due to the similar proportions of the forceps segments and shape of the penis lobes, especially the apical portion of the medial sclerite, and the presence of 2+1 intercalary veins in the cubital field of the forewings. This last character also confirms the inclusion of
<taxonomicName class="Insecta" family="Metretopodidae" genus="Siphloplecton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Siphloplecton" order="Ephemeroptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="1">Siphloplecton</emphasis>
</taxonomicName>
sp. 5 within the
<taxonomicName lsidName="S. jaegeri" pageId="0" pageNumber="1" rank="species" species="jaegeri">
<emphasis italics="true" pageId="0" pageNumber="1">S. jaegeri</emphasis>
</taxonomicName>
species group. At the same time, we could not confirm its conspecificy with
<taxonomicName class="Insecta" family="Metretopodidae" genus="Siphloplecton" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Siphloplecton landolti" order="Ephemeroptera" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="landolti">
<emphasis italics="true" pageId="0" pageNumber="1">Siphloplecton landolti</emphasis>
</taxonomicName>
sp. nov. or other species, since the details of the male genitalia are poorly visible.
</paragraph>
</subSubSection>
</treatment>
</document>