treatments-xml/data/B2/67/57/B267576F8FC158C0B4F74003045B3D75.xml

<document ID-DOI="http://dx.doi.org/10.3897/BDJ.10.e76864" ID-PMC="PMC8873171" ID-Pensoft-Pub="1314-2828-10-e76864" ID-Pensoft-UUID="1C21D32F5E3055DE84C15A1AF630C06E" ID-PubMed="35221751" ID-ZooBank="B9BEE8EAEC404DEEB2BE6CBBA33857B4" ModsDocID="1314-2828-10-e76864" checkinTime="1645139614884" checkinUser="pensoft" docAuthor="Noli, Nicholas Francesco, Di Franco, Davide, Schiaparelli, Stefano &amp; Brandt, Angelika" docDate="2022" docId="B267576F8FC158C0B4F74003045B3D75" docLanguage="en" docName="BiodivDatJour 10: e76864" docOrigin="Biodiversity Data Journal 10" docPubDate="2022-02-17" docSource="http://dx.doi.org/10.3897/BDJ.10.e76864" docTitle="Pseudidothea armata Noli, Di Franco, Schiaparelli, Brandt 2021, sp. n." docType="treatment" docVersion="2" id="1C21D32F5E3055DE84C15A1AF630C06E" lastPageNumber="76864" masterDocId="1C21D32F5E3055DE84C15A1AF630C06E" masterDocTitle="Pseudidothea armata sp. n., a new isopod of the genus Pseudidothea (Crustacea, Malacostraca, Isopoda) from the Atlantic sector of the Southern Ocean" masterLastPageNumber="76864" masterPageNumber="76864" pageNumber="76864" updateTime="1668121981657" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>Pseudidothea armata sp. n., a new isopod of the genus Pseudidothea (Crustacea, Malacostraca, Isopoda) from the Atlantic sector of the Southern Ocean</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Noli, Nicholas Francesco</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0001-8452-2882</mods:nameIdentifier>
<mods:affiliation>Dipartimento di Scienze della Terra dell'Ambiente e della Vita (DISTAV), Universita di Genova, Genova, Italy</mods:affiliation>
<mods:nameIdentifier type="email">nicholasfrancesco@hotmail.it</mods:nameIdentifier>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Di Franco, Davide</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-4595-839X</mods:nameIdentifier>
<mods:affiliation>Senckenberg Research Institute and Natural History Museum, Frankfurt am Main, Germany &amp; Goethe University Frankfurt, Institute for Ecology, Diversity and Evolution, Frankfurt am Main, Germany</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Schiaparelli, Stefano</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-0137-3605</mods:nameIdentifier>
<mods:affiliation>Dipartimento di Scienze della Terra dell'Ambiente e della Vita (DISTAV), Universita di Genova, Genova, Italy</mods:affiliation>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Brandt, Angelika</mods:namePart>
<mods:nameIdentifier type="ORCID">https://orcid.org/0000-0002-5807-1632</mods:nameIdentifier>
<mods:affiliation>Goethe University Frankfurt, Institute for Ecology, Diversity and Evolution, Frankfurt am Main, Germany &amp; Senckenberg Research Institute and Natural History Museum, Frankfurt am Main, Germany</mods:affiliation>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>Biodiversity Data Journal</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2022</mods:date>
<mods:detail type="pubDate">
<mods:number>2022-02-17</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>10</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>76864</mods:start>
<mods:end>76864</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:location>
<mods:url>http://dx.doi.org/10.3897/BDJ.10.e76864</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">http://dx.doi.org/10.3897/BDJ.10.e76864</mods:identifier>
<mods:identifier type="Pensoft-Pub">1314-2828-10-e76864</mods:identifier>
<mods:identifier type="ZooBank">B9BEE8EAEC404DEEB2BE6CBBA33857B4</mods:identifier>
<mods:identifier type="Pensoft-UUID">1C21D32F5E3055DE84C15A1AF630C06E</mods:identifier>
</mods:mods>
<treatment LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75" httpUri="http://treatment.plazi.org/id/B267576F8FC158C0B4F74003045B3D75" lastPageNumber="76864" pageId="0" pageNumber="76864">
<subSubSection pageId="0" pageNumber="76864" type="nomenclature">
<paragraph pageId="0" pageNumber="76864">
<taxonomicName LSID="B267576F-8FC1-58C0-B4F7-4003045B3D75" authority="Noli, Di Franco, Schiaparelli, Brandt 2021" authorityName="Noli, Di Franco, Schiaparelli, Brandt" authorityYear="2021" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea armata" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="species" species="armata" status="sp. n.">Pseudidothea armata Noli, Di Franco, Schiaparelli, Brandt 2021</taxonomicName>
<taxonomicNameLabel pageId="0" pageNumber="76864">sp. n.</taxonomicNameLabel>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="76864" type="materials_examined">
<paragraph pageId="0" pageNumber="76864">Materials</paragraph>
<paragraph pageId="0" pageNumber="76864">
<materialsCitation accessionNumber="MNA 10749" collectingDate="2022-01-01" collectingDateMax="2022-12-31" collectingDateMin="2022-01-01" collectingMethod="bottom trawl" collectionCode="MNA" country="Antarctica" county="PreservedSpecimen" determinerName="Nicholas Noli" latitude="-60.55876" location="Taxon" longitude="-41.08843" municipality="PhysicalObject" pageId="0" pageNumber="76864" specimenCode="MNA 10749" specimenCount="1" specimenCount-male="1" typeStatus="Holotype">
<emphasis bold="true" pageId="0" pageNumber="76864">Type status:</emphasis>
<materialsCitation accessionNumber="MNA 10749" collectingDate="2022-01-01" collectingDateMax="2022-12-31" collectingDateMin="2022-01-01" collectingMethod="bottom trawl" collectionCode="MNA" country="Antarctica" county="PreservedSpecimen" determinerName="Nicholas Noli" latitude="-60.55876" location="Taxon" longitude="-41.08843" municipality="PhysicalObject" specimenCode="MNA 10749" specimenCount="1" specimenCount-male="1" typeStatus="Holotype">
<typeStatus pageId="0" pageNumber="76864">Holotype</typeStatus>
. 
<emphasis bold="true" pageId="0" pageNumber="76864">Occurrence:</emphasis>
catalogNumber: 
<specimenCode pageId="0" pageNumber="76864">
<accessionNumber httpUri="http://www.ncbi.nlm.nih.gov/protein/MNA10749">MNA 10749</accessionNumber>
</specimenCode>
; individualCount: 
<specimenCount pageId="0" pageNumber="76864" type="generic">1</specimenCount>
; sex: 
<specimenType pageId="0" pageNumber="76864">male</specimenType>
; lifeStage: 
<specimenType pageId="0" pageNumber="76864">adult</specimenType>
; 
<emphasis bold="true" pageId="0" pageNumber="76864">
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:B6542C178361C5D648477CD7948F2D02" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Taxon">Taxon</location>
:
</emphasis>
kingdom: 
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:171D9D3E13C0D9F24E9A6E7D38470A7D" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Animalia">Animalia</location>
; phylum: 
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:7459C8E8EB77D3BDAFB400B0CC4D69C4" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Arthropoda">Arthropoda</location>
; class: 
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:FC9B1EB7F111B866C780F46D7A2D75CF" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Malacostraca">Malacostraca</location>
; order: 
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:2D447CF61A438021607A6E5157764A9B" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Isopoda">Isopoda</location>
; family: 
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:19761231C7492D4210C2CACCD3813994" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Pseudidotheidae">Pseudidotheidae</location>
; genus: 
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:3010538E89338044C49A534D867A84E5" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Pseudidothea">Pseudidothea</location>
; 
<emphasis bold="true" pageId="0" pageNumber="76864">
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:B3A42509AC6395E3A68477F9CD125652" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Location">Location</location>
:
</emphasis>
continent: 
<collectingCountry name="Antarctica">Antarctica</collectingCountry>
; locality: 
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:6D1BBED1448F02FB6A69D51357C87A7B" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Burdwood Bank" pageId="0" pageNumber="76864">Burdwood Bank</location>
; verbatimDepth: 852; decimalLatitude: 
<geoCoordinate orientation="latitude" pageId="0" pageNumber="76864" value="-60.55876">-60.55876</geoCoordinate>
; decimalLongitude: 
<geoCoordinate orientation="longitude" pageId="0" pageNumber="76864" value="-41.08843">-41.08843</geoCoordinate>
; 
<emphasis bold="true" pageId="0" pageNumber="76864">
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:CA00A237374CC82ECFC2BD109CA3B7CA" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Identification">Identification</location>
:
</emphasis>
identifiedBy: 
<determinerName pageId="0" pageNumber="76864">
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:5D7A9C61BB60C6F301A90038D88FC567" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Nicholas Noli">Nicholas Noli</location>
</determinerName>
; dateIdentified: 2019; 
<emphasis bold="true" pageId="0" pageNumber="76864">
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:2BB49B14FB5D7635DE5AE4AFE7ACBC1B" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Event">Event</location>
:
</emphasis>
eventID: 
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:4C1EDA98B7D045CEAF0688B3A03B37F6" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="St">St</location>
143; samplingProtocol: 
<collectingMethod pageId="0" pageNumber="76864">bottom trawl</collectingMethod>
; year: 2016; month: 3; day: 18; 
<emphasis bold="true" pageId="0" pageNumber="76864">
<location LSID="urn:lsid:plazi:treatment:B267576F8FC158C0B4F74003045B3D75:6F9909D30D7404B0CB5F7299060B06F8" country="Antarctica" county="PreservedSpecimen" latitude="-60.55876" longitude="-41.08843" municipality="PhysicalObject" name="Record Level">Record Level</location>
:
</emphasis>
type: 
<collectingMunicipality>PhysicalObject</collectingMunicipality>
; basisOfRecord: 
<collectingCounty>PreservedSpecimen</collectingCounty>
</materialsCitation>
</materialsCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="76864" type="description">
<paragraph pageId="0" pageNumber="76864">Description</paragraph>
<paragraph pageId="0" pageNumber="76864">Measurement. BL = 15 mm; BW = 5 mm.</paragraph>
<paragraph pageId="0" pageNumber="76864">
<emphasis bold="true" pageId="0" pageNumber="76864">Body</emphasis>
: Entire body surface rough and granular, covered with small hair-like setae (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
A, B and Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F7322315" captionText="Figure 3. Pseudidothea armata sp. n. male holotype (MNA 10749). A stack photo of lateral view; B stack photo of dorsal view; C stack photo of P 1, scale bar represents 0.5 mm; D stack photo of A 1, scale bar represents 1 mm; E stack photo of pleotelson. Scale bar represents 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure3" httpUri="https://binary.pensoft.net/fig/564022" pageId="0" pageNumber="76864">3</figureCitation>
A, B).
</paragraph>
<paragraph pageId="0" pageNumber="76864">
CEPHALOTHORAX. Head with two frontomedial lobes with many small tubercle-like protrusions. Cephalothorax with two large and stout spines, frontally directed (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
A, B and Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F7322315" captionText="Figure 3. Pseudidothea armata sp. n. male holotype (MNA 10749). A stack photo of lateral view; B stack photo of dorsal view; C stack photo of P 1, scale bar represents 0.5 mm; D stack photo of A 1, scale bar represents 1 mm; E stack photo of pleotelson. Scale bar represents 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure3" httpUri="https://binary.pensoft.net/fig/564022" pageId="0" pageNumber="76864">3</figureCitation>
A, B, Suppl. materials 1, 2), covered with tubercles and with diffused short hair-like setae (not illustrated in drawings, but visible in Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F7322315" captionText="Figure 3. Pseudidothea armata sp. n. male holotype (MNA 10749). A stack photo of lateral view; B stack photo of dorsal view; C stack photo of P 1, scale bar represents 0.5 mm; D stack photo of A 1, scale bar represents 1 mm; E stack photo of pleotelson. Scale bar represents 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure3" httpUri="https://binary.pensoft.net/fig/564022" pageId="0" pageNumber="76864">3</figureCitation>
). Two lateral eyes of medium size, slightly more subtriangular than oval (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
A B and Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F7322315" captionText="Figure 3. Pseudidothea armata sp. n. male holotype (MNA 10749). A stack photo of lateral view; B stack photo of dorsal view; C stack photo of P 1, scale bar represents 0.5 mm; D stack photo of A 1, scale bar represents 1 mm; E stack photo of pleotelson. Scale bar represents 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure3" httpUri="https://binary.pensoft.net/fig/564022" pageId="0" pageNumber="76864">3</figureCitation>
A, B, Suppl. material 1).
</paragraph>
<paragraph pageId="0" pageNumber="76864">
ANTENNA 1. First Antenna (A1) consisting of three peduncular and two flagellar articles. First peduncular article broadest, almost surpassing in width the length of the second peducular article, with one mediolateral simple bristle; second peduncular article long, nearly 1.5 times the first, the third almost a third of the second, rounded distally. First flagellar article short, ring-like, barely distinguishable; last flagellar article as long as the length of all the other articles of the A1. Distoventrally on this article, six pairs of aesthetascs, another single aesthetasc present in the tip of the A1 together with two simple setae (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
E and Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F7322315" captionText="Figure 3. Pseudidothea armata sp. n. male holotype (MNA 10749). A stack photo of lateral view; B stack photo of dorsal view; C stack photo of P 1, scale bar represents 0.5 mm; D stack photo of A 1, scale bar represents 1 mm; E stack photo of pleotelson. Scale bar represents 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure3" httpUri="https://binary.pensoft.net/fig/564022" pageId="0" pageNumber="76864">3</figureCitation>
D).
</paragraph>
<paragraph pageId="0" pageNumber="76864">
ANTENNA 2. Second Antenna (A2) half as long as body, consisting of five peduncular and three flagellar articles. First peduncular article very small, second about double in length of the first; third peduncular article 3 times longer than second, with a two ventral rows of long simple setae, each group with one long and one short seta. Fourth and fifth peduncular articles longest, nearly subequal in length, with similar setae pattern of the third article. Last peduncular article with a distolateral small feather-like seta. First flagellar article about twice as long as second and third flagellar articles together, bearing short bristles and one longer apical simple seta. Second article smaller and narrower than first, with many simple short bristles. Last flagellar article smallest, claw-like. The whole antenna covered with lots of short and small hairs (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
D).
</paragraph>
<paragraph pageId="0" pageNumber="76864">
PEREONITES. Pereonite 1 fused with cephalothorax, but separated by a ridge. Pereonite 2 only slightly shorther than pereonite 3; pereonite 4 longest. Pereonite 5 slightly shorter than pereonite 2, pereonite 6 and 7 smallest and shortest. Pereonite 1 with one pair of large dorsal spine-like tubercles, anteriorly directed. Pereonites 2-4 with two pairs of tubercles (one spine-like dorsal pair and one shield-like lateral pair). Dorsal pair of tubercles in pereonites 2-4 are large and high, apically flattened, covered with few hair-like small setae and small tubercle-like protrusions; in pereonites 5-7, these are smaller, more slender, apically acute, but with blunt tip and more laterally flattened. Lateral pairs of tubercles are large in pereonites 2-4, smaller in pereonites 5-7. Evident elevations separated by deep grooves characterise the surface of pereonites 2-4, between the dorsal and lateral tubercles. Elevations are also present on pereonites 5-7. However, these are more shallow, barely visible and uniformly covering the surface between the dorsal and lateral tubercles (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
A, B and Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F7322315" captionText="Figure 3. Pseudidothea armata sp. n. male holotype (MNA 10749). A stack photo of lateral view; B stack photo of dorsal view; C stack photo of P 1, scale bar represents 0.5 mm; D stack photo of A 1, scale bar represents 1 mm; E stack photo of pleotelson. Scale bar represents 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure3" httpUri="https://binary.pensoft.net/fig/564022" pageId="0" pageNumber="76864">3</figureCitation>
A, B).
</paragraph>
<paragraph pageId="0" pageNumber="76864">
PLEOTELSON. All pleonites fused to pleotelson, frontolaterally of pleotelson two stout and slightly rounded protrusions, caudally directed (Fig. 2A, B and Fig. 3E). Pleotelson frontally broadest, narrowing caudally. Tip of telson acuminating, but with blunt tip, slightly rounded, slightly bent dorsally; subapical telsonic spines absent, but two pairs of rounded large tubercles in two rows in the pleotelson, dorsally; the pleotelson lacks spines, but is covered entirely by medium-sized rounded protrusions, slightly smaller laterally (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
A, B and Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F7322315" captionText="Figure 3. Pseudidothea armata sp. n. male holotype (MNA 10749). A stack photo of lateral view; B stack photo of dorsal view; C stack photo of P 1, scale bar represents 0.5 mm; D stack photo of A 1, scale bar represents 1 mm; E stack photo of pleotelson. Scale bar represents 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure3" httpUri="https://binary.pensoft.net/fig/564022" pageId="0" pageNumber="76864">3</figureCitation>
E).
</paragraph>
<paragraph pageId="0" pageNumber="76864">
PEREOPODS. P1 shorther than P2-7. Basis and propodus longest; basis with few distoventral and distolateral simple setae; a row of small protuberances on the lateral outer-directed side of the article. Carpus trapezoidal, ischium, merus and carpus densely covered with sensory spines, especially on ventral and lateral surfaces. Subchelate propodus broad, oval, dactylus shorter than propodus, with two short smooth claws (the ventral one shorter) and a small spine in between (Fig. 
<figureCitation captionStart="Figure 4" captionStartId="F7678063" captionText="Figure 4. Pseudidothea armata sp. n. male holotype (MNA 10749). A left P 2; B right P 2; C right P 1, dorsal part; D right P 1, focus on inner part. Scale refers to 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure4" httpUri="https://binary.pensoft.net/fig/641082" pageId="0" pageNumber="76864">4</figureCitation>
C). Ventral surface of propodus forming slightly concave 
<normalizedToken originalValue="“spoon”">&quot;spoon&quot;</normalizedToken>
, medial surface with few short simple bristles (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
C, Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F7322315" captionText="Figure 3. Pseudidothea armata sp. n. male holotype (MNA 10749). A stack photo of lateral view; B stack photo of dorsal view; C stack photo of P 1, scale bar represents 0.5 mm; D stack photo of A 1, scale bar represents 1 mm; E stack photo of pleotelson. Scale bar represents 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure3" httpUri="https://binary.pensoft.net/fig/564022" pageId="0" pageNumber="76864">3</figureCitation>
C and Fig. 
<figureCitation captionStart="Figure 4" captionStartId="F7678063" captionText="Figure 4. Pseudidothea armata sp. n. male holotype (MNA 10749). A left P 2; B right P 2; C right P 1, dorsal part; D right P 1, focus on inner part. Scale refers to 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure4" httpUri="https://binary.pensoft.net/fig/641082" pageId="0" pageNumber="76864">4</figureCitation>
D). P2-4 similar, one strong spine dorsolaterally on basis of P2-P4, distodorsal margins of ischium, carpus and propodus without strong spines, but with rough cuticular surface; merus of P2-4 presents an evident protrusion on the dorsal surface of the distal part; important protrusion is also present dorsomedially on ischium of P2 and P4. Setation in P2-4 is similar, but most prominent in P2. Merus, carpus and propodus with groups of setae arranged in two ventral rows, each group consisting of one long seta and one short seta (Fig. 
<figureCitation captionStart="Figure 4" captionStartId="F7678063" captionText="Figure 4. Pseudidothea armata sp. n. male holotype (MNA 10749). A left P 2; B right P 2; C right P 1, dorsal part; D right P 1, focus on inner part. Scale refers to 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure4" httpUri="https://binary.pensoft.net/fig/641082" pageId="0" pageNumber="76864">4</figureCitation>
A and B). Small hairs present in all pereopods (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
F, G, H and Fig. 
<figureCitation captionStart="Figure 4" captionStartId="F7678063" captionText="Figure 4. Pseudidothea armata sp. n. male holotype (MNA 10749). A left P 2; B right P 2; C right P 1, dorsal part; D right P 1, focus on inner part. Scale refers to 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure4" httpUri="https://binary.pensoft.net/fig/641082" pageId="0" pageNumber="76864">4</figureCitation>
A, B). P5-7 slightly shorter, but subequal in length to P2-4. P5 with two long setae on basis, P6 and 7 without long setae. Basis of P5-7 presenting one stout rounded spine dorsolaterally, in addition to smaller spines; stout spines are also present on carpus and merus (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
I, J, L and K). In P5-7, basis longest, ischium and propodus elongated compared to other articles; dactylus presenting a terminal claw with one simple seta in the terminal part. On propodus of P5-7, some feather-like bristles; all pereopods covered with small hairs (Fig. 
<figureCitation captionStart="Figure 2" captionStartId="F7322311" captionText="Figure 2. Pseudidothea armata sp. n. male holotype (MNA 10749). A dorsal view; B lateral view; C P 1. Scale refers to 0.5 mm length. D A 2; E A 1; F P 2; G P 3; H P 4; I P 5; J P 6; K Dactylus of P 6; L P 7. Scale refers to 1 mm length for D-L." figureDoi="10.3897/BDJ.10.e76864.figure2" httpUri="https://binary.pensoft.net/fig/564021" pageId="0" pageNumber="76864">2</figureCitation>
I, J and L).
</paragraph>
<paragraph pageId="0" pageNumber="76864">
UROPODS. Ventral surface of uropods covered with many simple hairs. Uropod elongated, both rami of uropods about subequal in length (Fig. 
<figureCitation captionStart="Figure 3" captionStartId="F7322315" captionText="Figure 3. Pseudidothea armata sp. n. male holotype (MNA 10749). A stack photo of lateral view; B stack photo of dorsal view; C stack photo of P 1, scale bar represents 0.5 mm; D stack photo of A 1, scale bar represents 1 mm; E stack photo of pleotelson. Scale bar represents 1 mm length." figureDoi="10.3897/BDJ.10.e76864.figure3" httpUri="https://binary.pensoft.net/fig/564022" pageId="0" pageNumber="76864">3</figureCitation>
E).
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="76864" type="diagnosis">
<paragraph pageId="0" pageNumber="76864">Diagnosis</paragraph>
<paragraph pageId="0" pageNumber="76864">The new species is characterised by one pair of large blunt anteriorly directed supra-ocular spines on the first pereonite. In dorsal view, these are long, divergent, forming a v-shape, reaching beyond the eyes. Pereonites 2-7 with only two pairs of tubercles: one dorsal pair of spine-like tubercles and one lateral pair of shield-like tubercles. Dorsal tubercles on pereonites 2-4 are large, apically flattened in lateral view, slightly anteriorly directed; on pereonites 5-7, these are smaller, slender, more pointed, but apically blunt and upwards directed. Pleotelson with blunt, strong protrusions.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="76864" type="etymology">
<paragraph pageId="0" pageNumber="76864">Etymology</paragraph>
<paragraph pageId="0" pageNumber="76864">
The species is named 
<taxonomicName authorityName="Noli, Di Franco, Schiaparelli, Brandt" authorityYear="2021" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea armata" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea armata</emphasis>
</taxonomicName>
for its long supra-ocular and the dorso-apical spine-like tubercles, not simple 
<normalizedToken originalValue="“shielded”">&quot;shielded&quot;</normalizedToken>
tubercles like 
<taxonomicName baseAuthorityName="Stephensen" baseAuthorityYear="1947" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea scutata" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea scutata</emphasis>
</taxonomicName>
, but more like strong blunt 
<normalizedToken originalValue="“spines”">&quot;spines&quot;</normalizedToken>
: as a contraposition to 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
meaning &quot;that bears shield&quot;, 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
sp. n. &quot;bears weapons&quot;.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="76864" type="distribution">
<paragraph pageId="0" pageNumber="76864">Distribution</paragraph>
<paragraph pageId="0" pageNumber="76864">Only known from type locality, the Burdwood Bank (Antarctica), found at 852 m.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="76864" type="conservation">
<paragraph pageId="0" pageNumber="76864">Conservation</paragraph>
<paragraph pageId="0" pageNumber="76864">Specimen is stored and fixed with 96% ethanol in order to preserve it for further genetic analysis.</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="76864" type="remarks">
<paragraph pageId="0" pageNumber="76864">Remarks</paragraph>
<paragraph pageId="0" pageNumber="76864">
<taxonomicName authorityName="Ohlin" authorityYear="1901" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea</emphasis>
</taxonomicName>
Ohlin, 1901 is clearly distinguishable from other genera by the oval shape of the body and peculiar conformation of pereonites and first pereopod. 
<taxonomicName lsidName="P. bonnieri" pageId="0" pageNumber="76864" rank="species" species="bonnieri">
<emphasis italics="true" pageId="0" pageNumber="76864">P. bonnieri</emphasis>
</taxonomicName>
was the type species representing the genus, described by 
<bibRefCitation author="Ohlin, Axel Gabriel" journalOrPublisher="Norstedt &amp; soener" pageId="0" pageNumber="76864" refId="B7206509" refString="Ohlin, Axel Gabriel, 1901. Isopoda from Tierra Del Fuego and Patagonia, I. Valvifera. Norstedt &amp; soener" title="Isopoda from Tierra Del Fuego and Patagonia, I. Valvifera" year="1901">Ohlin (1901)</bibRefCitation>
. Subsequently, it was synonymised with 
<taxonomicName lsidName="P. miersi" pageId="0" pageNumber="76864" rank="species" species="miersi">
<emphasis italics="true" pageId="0" pageNumber="76864">P. miersi</emphasis>
</taxonomicName>
(
<bibRefCitation author="Studer, Theophil" journalOrPublisher="Kurfuerstlich Akademie der Wissenschaften, Berlin" pageId="0" pageNumber="76864" refId="B7438048" refString="Studer, Theophil, 1884. Isopoden, gesammelt waehrend der reise SMS Gazelle um die erde 1874-76. Kurfuerstlich Akademie der Wissenschaften, Berlin" title="Isopoden, gesammelt waehrend der reise SMS Gazelle um die erde 1874 - 76" year="1884">Studer 1884</bibRefCitation>
) because of the many similarities with the latter species. The genus is only known from the Southern Hemisphere and it is mostly known from the Antarctic Peninsula in the Southern Ocean. A record of 
<taxonomicName authorityName="Ohlin" authorityYear="1901" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea</emphasis>
</taxonomicName>
Ohlin, 1901 was also recorded in the Ross Sea (Fig. 
<figureCitation captionStart="Figure 1" captionStartId="F7322299" captionText="Figure 1. Distribution records of Pseudidothea Ohlin, 1901 in the Southern Ocean. Light blue square represents the location of Pseudidothea armata sp. n, recorded during the SO-AntEco JR 15005 RRS James Clark Ross expedition, in Burdwood Bank area (South Orkneys) in the framework of the British Antarctic Survey (BAS), 2016." figureDoi="10.3897/BDJ.10.e76864.figure1" httpUri="https://binary.pensoft.net/fig/564018" pageId="0" pageNumber="76864">1</figureCitation>
), although undetermined to species level (
<bibRefCitation author="Mackay, Kevin" journalOrPublisher="The National Institute of Water and Atmospheric Research (NIWA)" pageId="0" pageNumber="76864" refId="B7206584" refString="Mackay, Kevin, 2018. Ross Sea biodiversity survey 2004 (BioRoss). The National Institute of Water and Atmospheric Research (NIWA)" title="Ross Sea biodiversity survey 2004 (BioRoss)" year="2018">Mackay 2018</bibRefCitation>
). To date, four species belong to the genus 
<taxonomicName authorityName="Ohlin" authorityYear="1901" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea</emphasis>
</taxonomicName>
as referred to above (original names are presented; the type species is marked with an asterisk):
</paragraph>
<paragraph pageId="0" pageNumber="76864">
<taxonomicName authorityName="Poore &amp; Bardsley" authorityYear="2004" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea hoplites" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="species" species="hoplites">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea hoplites</emphasis>
</taxonomicName>
- 
<bibRefCitation author="Poore, Gary C. B." journalOrPublisher="Memoirs of Museum Victoria" pageId="0" pageNumber="76864" pagination="75 - 83" refId="B7206483" refString="Poore, Gary C. B., Bardsley, Tania M., 2004. Pseudidotheidae (Crustacea: Isopoda: Valvifera) reviewed with description of a new species, first from Australia. Memoirs of Museum Victoria 61 (1): 75 - 83" title="Pseudidotheidae (Crustacea: Isopoda: Valvifera) reviewed with description of a new species, first from Australia" volume="61" year="2004">Poore and Bardsley (2004)</bibRefCitation>
</paragraph>
<paragraph pageId="0" pageNumber="76864">
* 
<taxonomicName baseAuthorityName="Studer" baseAuthorityYear="1884" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea miersi" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="species" species="miersi">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea miersi</emphasis>
</taxonomicName>
- 
<bibRefCitation author="Ohlin, Axel Gabriel" journalOrPublisher="Norstedt &amp; soener" pageId="0" pageNumber="76864" refId="B7206509" refString="Ohlin, Axel Gabriel, 1901. Isopoda from Tierra Del Fuego and Patagonia, I. Valvifera. Norstedt &amp; soener" title="Isopoda from Tierra Del Fuego and Patagonia, I. Valvifera" year="1901">Ohlin 1901</bibRefCitation>
</paragraph>
<paragraph pageId="0" pageNumber="76864">
<taxonomicName authorityName="Hurley" authorityYear="1957" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea richardsoni" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="species" species="richardsoni">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea richardsoni</emphasis>
</taxonomicName>
- 
<bibRefCitation author="Hurley, D. E." journalOrPublisher="Zoology Publications Victoria University Collections" pageId="0" pageNumber="76864" pagination="1 - 20" refId="B7385894" refString="Hurley, D. E., 1957. Some Amphipoda, Isopoda and Tanaidacea from Cook Strait. Zoology Publications Victoria University Collections 21: 1 - 20" title="Some Amphipoda, Isopoda and Tanaidacea from Cook Strait" volume="21" year="1957">Hurley 1957</bibRefCitation>
</paragraph>
<paragraph pageId="0" pageNumber="76864">
<taxonomicName baseAuthorityName="Stephensen" baseAuthorityYear="1947" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea scutata" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea scutata</emphasis>
</taxonomicName>
- 
<bibRefCitation author="Stephensen, K." journalOrPublisher="Scientific results of the Norwegian Antarctic Expeditions 1927 - 28 et sqq." pageId="0" pageNumber="76864" pagination="1 - 90" refId="B7385885" refString="Stephensen, K., 1947. Tanaidacea, Isopoda, Amphipoda and Pycnogonida. Scientific results of the Norwegian Antarctic Expeditions 1927-28 et sqq. 2 (27): 1 - 90" title="Tanaidacea, Isopoda, Amphipoda and Pycnogonida" volume="2" year="1947">Stephensen 1947</bibRefCitation>
</paragraph>
<paragraph pageId="0" pageNumber="76864">
<taxonomicName authorityName="Noli, Di Franco, Schiaparelli, Brandt" authorityYear="2021" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea armata" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea armata</emphasis>
</taxonomicName>
sp. n.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="76864" type="differential diagnosis">
<paragraph pageId="0" pageNumber="76864">Differential diagnosis</paragraph>
<paragraph pageId="0" pageNumber="76864">
Within the genus 
<taxonomicName authorityName="Ohlin" authorityYear="1901" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="genus">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea</emphasis>
</taxonomicName>
, 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
(
<bibRefCitation author="Stephensen, Knud Hensch" journalOrPublisher="Scientific results of the Norwegian Antarctic Expeditions 1927 - 28 et sqq." pageId="0" pageNumber="76864" refId="B7206517" refString="Stephensen, Knud Hensch, 1947. Tanaidacea, Isopoda, Amphipoda, and Pycnogonida." title="Tanaidacea, Isopoda, Amphipoda, and Pycnogonida" year="1947">Stephensen 1947</bibRefCitation>
) is most similar to 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
sp. n. in shape and spine pattern. The main differences are the large supra-ocular spines and general body armature, that significantly differs from the apically flattened tubercles in 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
; similar is also the position of the flattened tubercles dorsally located in every pereonite of 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
; however, all of these structures are more like blunt spines in 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
sp. n. Another difference can be found in the extreme reduction of the elevations present in between lateral flattened tubercles and dorsal spine-like tubercles. Brandt and 
<normalizedToken originalValue="Wägele">Waegele</normalizedToken>
(1990) re-described 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
and illustrated flattened, irregular elevations on pereonites 5-7, while in 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
sp. n., these are barely present. The pleotelson of 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
and 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
sp. n. is similar in shape and tubercular pattern; however, it completely lacks pleotelsonic dorsal spines in 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
, only rounded, short and strong tubercles are present in the latter species.
</paragraph>
<paragraph pageId="0" pageNumber="76864">
Supra-ocular spines of 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
are long, dorsally pointed and anteriorly directed, reaching beyond the eyes in dorsal view. 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
presents supraocular tubercles that are shorter, dorsally flattened and do not reach the eyes on dorsal view. In addition, supra-ocular spines in 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
are divergent, forming a v-shape in dorsal view, while in 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
the supra-ocular tubercles are aligned parallel. The body armature in the two species shows a different pattern of tubercles. In 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
, dorsal tubercles are more similar to blunt spines, apically less flattened than those present in 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
. In particular, 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
's spine-like tubercles on pereonites 5-7 are not apically flattened at all, but slender and pointed with a blunt apex, while in 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
, pereonites 5-7 have small apically flat tubercles. 
<taxonomicName baseAuthorityName="Stephensen" baseAuthorityYear="1947" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea scutata" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea scutata</emphasis>
</taxonomicName>
presents raised areas in the lateral position, between the dorsal and lateral tubercles; these are marked on pereonites 5-7 and even described as distinct tubercles (
<bibRefCitation author="Brandt, Angelika" journalOrPublisher="Crustaceana" pageId="0" pageNumber="76864" pagination="97 - 105" refId="B7206526" refString="Brandt, Angelika, Waegele, J. W., 1990. Redescription of Pseudidothea scutatas (Stephensen, 1947) (Isopoda, Valvifera) and adaptations to a microphagous nutrition. Crustaceana 58 (1): 97 - 105" title="Redescription of Pseudidothea scutatas (Stephensen, 1947) (Isopoda, Valvifera) and adaptations to a microphagous nutrition" volume="58" year="1990">
Brandt and 
<normalizedToken originalValue="Wägele">Waegele</normalizedToken>
1990
</bibRefCitation>
, 
<bibRefCitation author="White, Martin" journalOrPublisher="Antarctic Science" pageId="0" pageNumber="76864" pagination="121 - 121" refId="B7477823" refString="White, Martin, 1992. Antarctic Isopoda Valvifera J. W. Waegele Koeltz Scientific Books, Koenigstein (1991) 213 pages. 130DM. ISBN 3 87429 324 6. Antarctic Science 4 (1): 121 - 121" title="Antarctic Isopoda Valvifera J. W. Waegele Koeltz Scientific Books, Koenigstein (1991) 213 pages. 130 DM. ISBN 3 87429 324 6" volume="4" year="1992">White 1992</bibRefCitation>
). 
<taxonomicName authorityName="Noli, Di Franco, Schiaparelli, Brandt" authorityYear="2021" class="Pycnogonida" family="Pseudidotheidae" genus="Pseudidothea" higherTaxonomySource="CoL" kingdom="Animalia" lsidName="Pseudidothea armata" order="Amphipoda" pageId="0" pageNumber="76864" phylum="Arthropoda" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">Pseudidothea armata</emphasis>
</taxonomicName>
presents raised areas as well. However, elevations are more evident on pereonites 2-4, separated by deep grooves, making the surface between the dorsal and lateral tubercles look 
<normalizedToken originalValue="“wrinkly”">&quot;wrinkly&quot;</normalizedToken>
, while elevations on pereonites 5-7 are less visible. Basis of P5 in 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
has two long setae, while there are only simple setae on P5 of 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
.
</paragraph>
<paragraph pageId="0" pageNumber="76864">
The pleotelson of 
<taxonomicName lsidName="P. scutata" pageId="0" pageNumber="76864" rank="species" species="scutata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. scutata</emphasis>
</taxonomicName>
and 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
is similar in shape and tubercular pattern; however, it completely lacks pleotelsonic dorsal spines in 
<taxonomicName lsidName="P. armata" pageId="0" pageNumber="76864" rank="species" species="armata">
<emphasis italics="true" pageId="0" pageNumber="76864">P. armata</emphasis>
</taxonomicName>
; only rounded, short and strong tubercles are present in the latter species.
</paragraph>
</subSubSection>
<subSubSection pageId="0" pageNumber="76864" type="distribution">
<paragraph pageId="0" pageNumber="76864">Distribution</paragraph>
<paragraph pageId="0" pageNumber="76864">Only known from type locality.</paragraph>
</subSubSection>
</treatment>
</document>