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<document ID-DOI="http://doi.org/10.5281/zenodo.4656840" ID-GBIF-Dataset="b2965e77-0c09-4922-9e0b-df5280332a01" ID-GBIF-Taxon="180783988" ID-ISSN="0067-1975" ID-Zenodo-Dep="4656840" checkinTime="1617214713504" checkinUser="felipe" docAuthor="Keable, Stephen J." docDate="1998" docId="03877748FFF0FFC3497EFA2BB555F3DC" docLanguage="en" docName="RecAustMus.50.1.19-26.pdf.imf" docOrigin="Records of the Australian Museum 50 (1)" docSource="https://journals.australian.museum/keable-1998-rec-aust-mus-501-1926/" docStyle="DocumentStyle:CF64E561BE6B94FA5F31B9132C6D4316.1:RecAustMus.1998.journal_article" docStyleId="CF64E561BE6B94FA5F31B9132C6D4316" docStyleName="RecAustMus.1998.journal_article" docStyleVersion="1" docTitle="Aatolana Bruce 1993" docType="treatment" docVersion="7" lastPageId="2" lastPageNumber="21" masterDocId="FFBE0F30FFF1FFC14B45FFA7B27FFFAE" masterDocTitle="A third species of Aatolana Bruce, 1993 (Crustacea: Isopoda: Cirolanidae)" masterLastPageNumber="26" masterPageNumber="19" pageId="1" pageNumber="20" updateTime="1643595231535" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>A third species of Aatolana Bruce, 1993 (Crustacea: Isopoda: Cirolanidae)</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Keable, Stephen J.</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>Records of the Australian Museum</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>1998</mods:date>
<mods:detail type="pubDate">
<mods:number>1998-05-13</mods:number>
</mods:detail>
<mods:detail type="volume">
<mods:number>50</mods:number>
</mods:detail>
<mods:detail type="issue">
<mods:number>1</mods:number>
</mods:detail>
<mods:extent unit="page">
<mods:start>19</mods:start>
<mods:end>26</mods:end>
</mods:extent>
</mods:part>
</mods:relatedItem>
<mods:location>
<mods:url>https://journals.australian.museum/keable-1998-rec-aust-mus-501-1926/</mods:url>
</mods:location>
<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">10.3853/j.0067-1975.50.1998.1272</mods:identifier>
<mods:identifier type="GBIF-Dataset">b2965e77-0c09-4922-9e0b-df5280332a01</mods:identifier>
<mods:identifier type="ISSN">0067-1975</mods:identifier>
<mods:identifier type="Zenodo-Dep">4652847</mods:identifier>
</mods:mods>
<treatment ID-DOI="http://doi.org/10.5281/zenodo.4656840" ID-GBIF-Taxon="180783988" ID-Zenodo-Dep="4656840" LSID="urn:lsid:plazi:treatment:03877748FFF0FFC3497EFA2BB555F3DC" httpUri="http://treatment.plazi.org/id/03877748FFF0FFC3497EFA2BB555F3DC" lastPageId="2" lastPageNumber="21" pageId="1" pageNumber="20">
<subSubSection box="[571,859,1420,1459]" pageId="1" pageNumber="20" type="nomenclature">
<paragraph blockId="1.[571,859,1420,1459]" box="[571,859,1420,1459]" pageId="1" pageNumber="20">
<heading box="[571,859,1420,1459]" centered="true" fontSize="10" level="2" pageId="1" pageNumber="20" reason="2">
<taxonomicName authority="Bruce" authorityName="Bruce" authorityYear="1993" box="[571,859,1420,1459]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="1" pageNumber="20" phylum="Arthropoda" rank="genus">
<emphasis box="[571,737,1420,1459]" italics="true" pageId="1" pageNumber="20">Aatolana</emphasis>
Bruce
</taxonomicName>
</heading>
</paragraph>
</subSubSection>
<subSubSection box="[225,1023,1513,1548]" pageId="1" pageNumber="20" type="reference_group">
<paragraph blockId="1.[225,1023,1513,1548]" box="[225,1023,1513,1548]" pageId="1" pageNumber="20">
<treatmentCitationGroup box="[225,1023,1513,1548]" pageId="1" pageNumber="20">
<treatmentCitation author="Bruce, N. L." box="[225,630,1513,1548]" page="2" pageId="1" pageNumber="20" year="1993">
<taxonomicName authority="Bruce, 1993 b: 2" authorityName="Bruce" authorityPageNumber="2" authorityYear="1993" box="[225,630,1513,1548]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="1" pageNumber="20" phylum="Arthropoda" rank="genus">
<emphasis box="[225,364,1513,1548]" italics="true" pageId="1" pageNumber="20">Aatolana</emphasis>
<bibRefCitation author="Bruce, N. L." box="[379,630,1513,1548]" pageId="1" pageNumber="20" pagination="1 - 15" refId="ref5817" refString="Bruce, N. L., 1993 b. Two new genera of marine isopod crustaceans (Cirolanidae) from Madang, Papua New Guinea. Memoirs of the Queensland Museum 33 (1): 1 - 15." type="journal article" year="1993">Bruce, 1993b: 2</bibRefCitation>
</taxonomicName>
</treatmentCitation>
.-Brusca
<emphasis box="[778,863,1513,1548]" italics="true" pageId="1" pageNumber="20">et aI.,</emphasis>
1995: 96.
</treatmentCitationGroup>
</paragraph>
</subSubSection>
<subSubSection lastPageId="2" lastPageNumber="21" pageId="1" pageNumber="20" type="materials_examined">
<paragraph blockId="1.[227,1207,1597,1681]" pageId="1" pageNumber="20">
<typeStatus box="[227,308,1597,1636]" pageId="1" pageNumber="20">Type</typeStatus>
species:
<taxonomicName authority="Bruce, 1993 b" authorityName="Bruce" authorityYear="1993" box="[471,987,1597,1636]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="1" pageNumber="20" phylum="Arthropoda" rank="species" species="rapax">
<emphasis box="[471,742,1597,1636]" italics="true" pageId="1" pageNumber="20">Aatolana rapax</emphasis>
<bibRefCitation author="Bruce, N. L." box="[758,987,1597,1636]" pageId="1" pageNumber="20" pagination="1 - 15" refId="ref5817" refString="Bruce, N. L., 1993 b. Two new genera of marine isopod crustaceans (Cirolanidae) from Madang, Papua New Guinea. Memoirs of the Queensland Museum 33 (1): 1 - 15." type="journal article" year="1993">Bruce, 1993b</bibRefCitation>
</taxonomicName>
(by original designation).
</paragraph>
<paragraph blockId="1.[221,1206,1731,2966]" pageId="1" pageNumber="20">
Diagnosis:
<emphasis box="[430,701,1731,1772]" italics="true" pageId="1" pageNumber="20">Frontal lamina:</emphasis>
short, length approximately 1.3-2.5 x basal width; anterior margin convex with a dorsally deflected apical point, or with an excavate extension; ventral surface flat, or with the posterior section projecting.
<emphasis box="[417,557,1916,1956]" italics="true" pageId="1" pageNumber="20">Clypeus:</emphasis>
ventral surface not projecting relative to frontal lamina.
<emphasis box="[546,700,1962,2002]" italics="true" pageId="1" pageNumber="20">Antenna:</emphasis>
peduncular articles 1 and 2 shortest, subequal; peduncular article 4 longer than article 3; peduncular article 5 longer than article 4 and all other articles.
<emphasis box="[369,483,2100,2139]" italics="true" pageId="1" pageNumber="20">Pereon</emphasis>
and
<emphasis box="[573,678,2100,2139]" italics="true" pageId="1" pageNumber="20">pleon:</emphasis>
dorsal surfaces without setae, tubercles, processes orfurrows.
<emphasis box="[750,886,2146,2186]" italics="true" pageId="1" pageNumber="20">Pleonite</emphasis>
3: epimera broader than that of other pleonites, with lateral row of slender setae; dorsal and ventral posterolateral margins convex, converging smoothly to a point, posteroventral excision absent; enclosing but not covering epimera of pleonite 4; extending to or beyond posterior of pleonite 5.
<emphasis box="[1020,1201,2375,2414]" italics="true" pageId="1" pageNumber="20">Pleonite 5:</emphasis>
posterolateral margins encompassed by pleonite 4.
<emphasis box="[222,393,2467,2507]" italics="true" pageId="1" pageNumber="20">Pereopods</emphasis>
1-7: dactylus with secondary unguis present or absent; secondary unguis not large and strongly sclerotized when present.
<emphasis box="[477,640,2560,2599]" italics="true" pageId="1" pageNumber="20">Pereopod</emphasis>
1: merus anterodistal angle not produced to posterodistal extent of carpus or beyond.
<emphasis box="[222,384,2651,2690]" italics="true" pageId="1" pageNumber="20">Pereopod</emphasis>
7: basis, ischium and merus with or without plumose setae.
<emphasis box="[489,600,2697,2737]" italics="true" pageId="1" pageNumber="20">Penes:</emphasis>
present; short, approximately 2 x width; forming well separated flattened lobes.
<emphasis italics="true" pageId="1" pageNumber="20">Pleopod 2 appendix masculina:</emphasis>
arising basally; longer than endopod in fully developed specimens; slender.
<emphasis box="[943,1200,2835,2874]" italics="true" pageId="1" pageNumber="20">Pleopods 1-5:</emphasis>
endopod plumose setae present across distal margins of pleopods 1-4 and absent on pleopod 5.
</paragraph>
<paragraph blockId="1.[220,1203,3016,3194]" lastBlockId="1.[1274,2265,404,3201]" pageId="1" pageNumber="20">
Additional characters:
<emphasis box="[650,747,3016,3056]" italics="true" pageId="1" pageNumber="20">Body:</emphasis>
narrow, length 2.0-3.5 x greatest width; lateral margins sub-parallel in dorsal view.
<emphasis box="[222,388,3108,3148]" italics="true" pageId="1" pageNumber="20">Cephalon:</emphasis>
broad, width greater than 60% of pereonite 1; moderately enclosed by pereonite 1; without tubercles or processes; anterior margin with medial indentation, not extending to cover proximal articles of antennule; rostrum not prominent.
<emphasis box="[1553,1640,496,536]" italics="true" pageId="1" pageNumber="20">Eyes:</emphasis>
well developed, ommatidia clearly defined, pigmented; elongate, length approximately 3 x width; not divided by unfaceted band.
<emphasis box="[1983,2261,588,626]" italics="true" pageId="1" pageNumber="20">Frontal lamina:</emphasis>
visible in dorsal view; forming an angle of 90° or of less than 45° with clypeus; not fused to cephalon.
<emphasis box="[2078,2261,680,718]" italics="true" pageId="1" pageNumber="20">Antennule:</emphasis>
colinear, peduncular article 2 not at right angles to article 1; much shorter than antenna, just reaching pereonite 1. Peduncular articles 1-3 not fused; article 3 well developed, longer than articles 1-2, or subequal to article 1 with article 2 shortest. Accessory flagellum absent. Primary flagellum longer than peduncle; callynophore absent.
<emphasis box="[2037,2190,956,995]" italics="true" pageId="1" pageNumber="20">Antenna:</emphasis>
not sexually dimorphic. Peduncle comprised of 5 articles. Flagellum much longer than peduncle.
</paragraph>
<paragraph blockId="1.[1274,2265,404,3201]" pageId="1" pageNumber="20">
<emphasis box="[1326,1497,1094,1133]" italics="true" pageId="1" pageNumber="20">Mandible:</emphasis>
molar well developed; medial surface with slender setae; marginal robust setae present, numerous. Incisor broad, wider than narrowest part of mandible; serrate; not quadridentate on left mandible. Lacinia mobilis absent orpresent onleft mandible as a triangular sclerotized process embedded between the setal row and the incisor. Setal row present, well developed, with numerous robust setae; intermediate slender setae absent. Palp 3-articulate; inserted adjacent to molar; article 3 distally narrow.
<emphasis box="[1278,1422,1508,1547]" italics="true" pageId="1" pageNumber="20">Maxilla:</emphasis>
lateral lobe and middle lobe subequal; medial lobe short and broad; lateral, middle and medial lobes with numerous setae.
<emphasis box="[1587,1790,1600,1639]" italics="true" pageId="1" pageNumber="20">Maxilliped:</emphasis>
palp medial margin with slender setae on more than half the length of articles 2-5; lateral margin with slender or plumose setae along most of the length of articles 2-5; article 3 with distal margin width greater than proximal margin of article 4; article 4 with distal margin width greater than proximal margin of article 5. Endite with coupling hooks.
</paragraph>
<paragraph blockId="1.[1274,2265,404,3201]" pageId="1" pageNumber="20">
<emphasis box="[1324,1449,1922,1961]" italics="true" pageId="1" pageNumber="20">Pereon:</emphasis>
pereonite 1 distinctly longer than pereonite 2.
<emphasis box="[1279,1392,1968,2007]" italics="true" pageId="1" pageNumber="20">Coxae:</emphasis>
not forming sternal plates.
</paragraph>
<paragraph blockId="1.[1274,2265,404,3201]" pageId="1" pageNumber="20">
<emphasis box="[1324,1431,2014,2053]" italics="true" pageId="1" pageNumber="20">Pleon:</emphasis>
not sexually dimorphic; five unfused se&lt;gments present, all equally visible along dorsal margin, or pleonite 1 partially or completely concealed by pereonite 7, in dorsal view all appearing broader than pleotelson.
</paragraph>
<paragraph blockId="1.[1274,2265,404,3201]" pageId="1" pageNumber="20">
<emphasis box="[1323,1517,2197,2236]" italics="true" pageId="1" pageNumber="20">Pleotelson:</emphasis>
dorsal surface smooth with anterodorsal depression, tubercles, pits and ridges absent, setae present or absent; margins convex, meeting at an acute apex; marginal robust setae present; marginal plumose setae present, restricted to posterolateral margins, abundant; marginal teeth-like serrations absent.
</paragraph>
<paragraph blockId="1.[1274,2265,404,3201]" lastBlockId="2.[232,1214,387,1347]" lastPageId="2" lastPageNumber="21" pageId="1" pageNumber="20">
<emphasis box="[1323,1503,2473,2512]" italics="true" pageId="1" pageNumber="20">Pereopods</emphasis>
1-3: ischium anterodistal angle produced subequally. Merus anterodistal angle more produced on pereopods 2 and 3. Dactylus not longer than propodus.
<emphasis box="[1275,1435,2611,2651]" italics="true" pageId="1" pageNumber="20">Pereopod</emphasis>
7: coxa not extending beyond posterior of pleon. Basis not noticeably broader in distal half compared to proximalhalf; anteriormargin withlong plumose or slender setae along entire length (using the conventions for pereopod orientation outlined by
<bibRefCitation author="Bruce, N. L." box="[1864,2114,2795,2833]" pageId="1" pageNumber="20" pagination="1 - 15" refId="ref5817" refString="Bruce, N. L., 1993 b. Two new genera of marine isopod crustaceans (Cirolanidae) from Madang, Papua New Guinea. Memoirs of the Queensland Museum 33 (1): 1 - 15." type="journal article" year="1993">Bruce (1993b)</bibRefCitation>
, not the posterior margin as he states); medial carina with plumose or slender setae along most of length of article, or slender setae only distally; posterodistal angle without long plumose setae. Ischium anterior margin with plumose and slender setae present or absent, setae abundant and occurring along entire length when present; posterior margin with plumose and slender setae absent. Merus anterior margin with slender setae absent, plumose setae present or absent; posterior margin with plumose and slender setae absent.
</paragraph>
<paragraph blockId="2.[232,1214,387,1347]" pageId="2" pageNumber="21">
<emphasis box="[282,463,479,518]" italics="true" pageId="2" pageNumber="21">Pleopods:</emphasis>
peduncle respiratory branchiae absent; accessory lobe well developed, with complex folding.
<emphasis box="[235,390,571,610]" italics="true" pageId="2" pageNumber="21">Pleopods</emphasis>
1-4: exopods with slender accessory lamella at posterior proximolateral angle; endopods with elongate laterally curving lobe arising from proximomedial angle.
<emphasis box="[234,375,709,749]" italics="true" pageId="2" pageNumber="21">Pleopod</emphasis>
1: not operculate to posterior pleopods; peduncle length shorter than breadth; exopod and endopod narrow, length greater than 2 x width; exopod medial margin convex, narrow at apex, lateral margin relatively straight; endopod width greater than 0.5 x width of exopod.
</paragraph>
<paragraph blockId="2.[232,1214,387,1347]" pageId="2" pageNumber="21">
<emphasis box="[285,452,939,979]" italics="true" pageId="2" pageNumber="21">Uropods:</emphasis>
inserted ventrolaterally on pleotelson; extending posteriorly beyond pleotelson. Peduncle strongly produced along medial margin of endopod. Endopod and exopod margins with robust setae; plumose setae present on most of margin length; apices sub-bifid, without robust setae. Endopod lateral margin sinuate, straight or slightly convex (not concave); without prominent lateral excision; without distinct pit. Exopod dorsoventrally flattened, not extending posteriorly beyond endopod.
</paragraph>
</subSubSection>
<subSubSection pageId="2" pageNumber="21" type="discussion">
<paragraph blockId="2.[224,1215,1401,3187]" pageId="2" pageNumber="21">
<emphasis bold="true" box="[232,410,1401,1440]" pageId="2" pageNumber="21">Remarks.</emphasis>
The diagnosis and description of
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[1049,1212,1401,1440]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1049,1212,1401,1440]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
provided by
<bibRefCitation author="Bruce, N. L." box="[466,722,1447,1486]" pageId="2" pageNumber="21" pagination="1 - 15" refId="ref5817" refString="Bruce, N. L., 1993 b. Two new genera of marine isopod crustaceans (Cirolanidae) from Madang, Papua New Guinea. Memoirs of the Queensland Museum 33 (1): 1 - 15." type="journal article" year="1993">Bruce (1993b)</bibRefCitation>
is emended here based on the material of
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[507,667,1493,1532]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[507,667,1493,1532]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
examined in this study and in that of Keable (1997). Particularly important changes to the original diagnosis of
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[789,962,1585,1624]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[789,962,1585,1624]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
include: the recognition of a small secondary unguis on the dactylus of pereopods
<quantity box="[471,574,1677,1716]" metricMagnitude="-1" metricUnit="m" metricValue="1.016" metricValueMax="1.778" metricValueMin="0.254" pageId="2" pageNumber="21" unit="in" value="4.0" valueMax="7.0" valueMin="1.0">1-7 in</quantity>
the species described here; variation in the form of the frontal lamina; and variation in the setation of pereopod 7.
</paragraph>
<paragraph blockId="2.[224,1215,1401,3187]" lastBlockId="2.[1280,2269,388,3186]" pageId="2" pageNumber="21">
Three uniqu.e apomorphies characterising species of
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[227,399,1861,1900]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[227,399,1861,1900]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
were recognised by
<bibRefCitation author="Bruce, N. L." box="[836,1122,1861,1900]" pageId="2" pageNumber="21" pagination="1 - 15" refId="ref5817" refString="Bruce, N. L., 1993 b. Two new genera of marine isopod crustaceans (Cirolanidae) from Madang, Papua New Guinea. Memoirs of the Queensland Museum 33 (1): 1 - 15." type="journal article" year="1993">Bruce (1993b)</bibRefCitation>
: the prominent, posteriorly acute epimera of pleonite 3; the complexrefolded lobe on the lateral margin of the peduncle of pleopods 1-5; and the structure of the frontal lamina. Of these suggested apomorphies, only the enlarged epimera of pleonite 3 (which is made additionally distinctive by having a row of slender setae along the medial longitudinal carina of the lateral surface) is shared exclusively between species of
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[424,587,2228,2268]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[424,587,2228,2268]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
and remains as a putative unique synapomorphy of these species that unambiguously defines the genus. Examination of all three species of
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[1054,1211,2320,2360]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1054,1211,2320,2360]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
and also the figures ofA.
<taxonomicName authority="Bruce, 1993 b" authorityName="Bruce" authorityYear="1993" box="[672,1011,2366,2405]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="species" species="rapax">
<emphasis box="[672,768,2366,2405]" italics="true" pageId="2" pageNumber="21">rapax</emphasis>
<bibRefCitation author="Bruce, N. L." box="[782,1011,2366,2405]" pageId="2" pageNumber="21" pagination="1 - 15" refId="ref5817" refString="Bruce, N. L., 1993 b. Two new genera of marine isopod crustaceans (Cirolanidae) from Madang, Papua New Guinea. Memoirs of the Queensland Museum 33 (1): 1 - 15." type="journal article" year="1993">Bruce, 1993b</bibRefCitation>
</taxonomicName>
, shows that the refolding of the lobe on the lateral margin of the pleopod peduncle is poorly developed on pleopod 1 but characteristic of pleopods 2-5 (
<bibRefCitation author="Keable, S. J." box="[771,1026,2504,2543]" pageId="2" pageNumber="21" refId="ref6200" refString="Keable, S. J., 1996 b. Revision of the taxonomy, systematics and biogeography of Natatolana (Crustacea: Isopoda: Cirolanidae). UnpubJished PhD thesis, Macquarie University, pp. 751." type="book" year="1996">Keable, 1996b</bibRefCitation>
). On these pleopods the lobe extends distally on the peduncles (see Fig. 2). Furthermore, examination of specimens of species of
<taxonomicName authority="A. Milne Edwards, 1879" authorityName="A. Milne Edwards" authorityYear="1879" box="[270,896,2642,2681]" class="Malacostraca" family="Cirolanidae" genus="Bathynomus" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[270,476,2642,2681]" italics="true" pageId="2" pageNumber="21">Bathynomus</emphasis>
A.
<bibRefCitation author="Milne Edwards, A." box="[534,896,2642,2681]" pageId="2" pageNumber="21" pagination="21 - 23" refId="ref6441" refString="Milne Edwards, A., 1879. Sur un Isopode gigantesque des grandes profondeurs de lar mer. Comptes Rendus Hebdomadaire des Seances de l'Academie des Sciences, Paris 88: 21 - 23." type="journal article" year="1879">Milne Edwards, 1879</bibRefCitation>
</taxonomicName>
,
<taxonomicName authority="Bruce, 1986" authorityName="Bruce" authorityYear="1986" class="Malacostraca" family="Cirolanidae" genus="Booralana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[913,1091,2642,2681]" italics="true" pageId="2" pageNumber="21">Booralana</emphasis>
<bibRefCitation author="Bruce, N. L." pageId="2" pageNumber="21" pagination="1 - 239" refId="ref5747" refString="Bruce, N. L., 1986. Cirolanidae (Crustacea: Isopoda) ofAustralia. Records of the Australian Museum Supplement 6: 1 - 239." type="journal article" year="1986">Bruce, 1986</bibRefCitation>
</taxonomicName>
and an undescribed taxon similar to
<taxonomicName authority="(H. Milne Edwards, 1840)" baseAuthorityName="H. Milne Edwards" baseAuthorityYear="1840" class="Malacostraca" family="Cirolanidae" genus="Dolicholana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="species" species="elongata">
<emphasis italics="true" pageId="2" pageNumber="21">Dolicholana elongata</emphasis>
(H.
<bibRefCitation author="Milne Edwards, H." box="[451,817,2734,2773]" pageId="2" pageNumber="21" pagination="1 - 42" refId="ref6613" refString="Milne Edwards, H., 1840. Histoire naturelle des Crustaces, comprenant l'anatomie, la physiologie et la classification de ces animaux. Roret, Paris, pp. 638, pis 1 - 42." type="journal article" year="1840">Milne Edwards, 1840</bibRefCitation>
)
</taxonomicName>
show that they have a comparable lobe on the lateral margin of the peduncle of the pleopods (
<bibRefCitation author="Keable, S. J." box="[472,727,2826,2865]" pageId="2" pageNumber="21" refId="ref6200" refString="Keable, S. J., 1996 b. Revision of the taxonomy, systematics and biogeography of Natatolana (Crustacea: Isopoda: Cirolanidae). UnpubJished PhD thesis, Macquarie University, pp. 751." type="book" year="1996">Keable, 1996b</bibRefCitation>
). Additionally, the structure of the frontal lamina cannot be recognised as a unique synapomorphy shared by species
<emphasis box="[794,993,2918,2957]" italics="true" pageId="2" pageNumber="21">ofAatolana</emphasis>
because this character varies considerably among the three species now placed in this genus and can actually be used to discriminate these species (Keable, 1997; this study). However, the variation in structure of the frontal lamina found in these species is relatively simple and it may be possible to hypothesize a transformation series for this character when the phylogeny of the
<taxonomicName baseAuthorityName="Keable" baseAuthorityYear="1996" box="[1921,2115,434,473]" class="Malacostraca" family="Cirolanidae" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="family">Cirolanidae</taxonomicName>
is better understood.
</paragraph>
<paragraph blockId="2.[1280,2269,388,3186]" pageId="2" pageNumber="21">
<bibRefCitation author="Bruce, N. L." box="[1334,1575,526,565]" pageId="2" pageNumber="21" pagination="1 - 15" refId="ref5817" refString="Bruce, N. L., 1993 b. Two new genera of marine isopod crustaceans (Cirolanidae) from Madang, Papua New Guinea. Memoirs of the Queensland Museum 33 (1): 1 - 15." type="journal article" year="1993">Bruce (1993b)</bibRefCitation>
suggested that species of
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[2017,2172,526,565]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[2017,2172,526,565]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
were similar only to species of
<emphasis box="[1705,1892,572,611]" italics="true" pageId="2" pageNumber="21">
<taxonomicName authorityName="Bruce" authorityYear="1986" box="[1705,1886,572,611]" class="Malacostraca" family="Cirolanidae" genus="Booralana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">Booralana</taxonomicName>
,
</emphasis>
with which they share comparable elongate eyes, prominent flattened penes, a medially indented cephalon and prominent epimera on pleonite 3.
<bibRefCitation author="Bruce, N. L." box="[1482,1724,710,749]" pageId="2" pageNumber="21" pagination="1 - 15" refId="ref5817" refString="Bruce, N. L., 1993 b. Two new genera of marine isopod crustaceans (Cirolanidae) from Madang, Papua New Guinea. Memoirs of the Queensland Museum 33 (1): 1 - 15." type="journal article" year="1993">Bruce (1993b)</bibRefCitation>
further noted that the structure of the frontal lamina differed between species placed in these two genera. However, the frontal lamina of species of
<taxonomicName authorityName="Bruce" authorityYear="1986" box="[1337,1518,848,887]" class="Malacostraca" family="Cirolanidae" genus="Booralana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1337,1518,848,887]" italics="true" pageId="2" pageNumber="21">Booralana</emphasis>
</taxonomicName>
has been described as being formed from two parts, an anterior half and a posteroventral section which projects (
<bibRefCitation author="Bruce, N. L." box="[1559,1767,941,979]" pageId="2" pageNumber="21" pagination="1 - 239" refId="ref5747" refString="Bruce, N. L., 1986. Cirolanidae (Crustacea: Isopoda) ofAustralia. Records of the Australian Museum Supplement 6: 1 - 239." type="journal article" year="1986">Bruce, 1986</bibRefCitation>
; Camp &amp;
<collectingCountry box="[1947,2052,941,979]" name="Heard Island and McDonald Islands" pageId="2" pageNumber="21">Heard</collectingCountry>
, 1988). This description matches that of the frontal lamina of the species of
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[1335,1494,1033,1071]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1335,1494,1033,1071]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
described here. Furthermore, an additional character shared between species placed in these two genera, which has not been remarked upon previously, is the slender accessory lamella at the posterior proximolateral angle of the exopod of pleopods 1-4 which has been described in species of
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[1475,1632,1263,1301]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1475,1632,1263,1301]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
(
<bibRefCitation author="Holdich, D. M. &amp; K. Harrison &amp; N. L. Bruce" box="[1663,2015,1263,1301]" pageId="2" pageNumber="21" pagination="555 - 605" refId="ref6032" refString="Holdich, D. M., K. Harrison &amp; N. L. Bruce, 1981. Cirolanid isopods from the Townsville region of Queensland, Australia, with descriptions of six new species. Journal of Natural History 15: 555 - 605." type="journal article" year="1981">
Holdich
<emphasis box="[1819,1907,1263,1301]" italics="true" pageId="2" pageNumber="21">et al.</emphasis>
1981
</bibRefCitation>
;
<bibRefCitation author="Bruce, N. L." box="[2042,2258,1263,1301]" pageId="2" pageNumber="21" pagination="1 - 239" refId="ref5747" refString="Bruce, N. L., 1986. Cirolanidae (Crustacea: Isopoda) ofAustralia. Records of the Australian Museum Supplement 6: 1 - 239." type="journal article" year="1986">Bruce, 1986</bibRefCitation>
,
<bibRefCitation author="Bruce, N. L." box="[1289,1393,1308,1347]" pageId="2" pageNumber="21" pagination="1 - 15" refId="ref5817" refString="Bruce, N. L., 1993 b. Two new genera of marine isopod crustaceans (Cirolanidae) from Madang, Papua New Guinea. Memoirs of the Queensland Museum 33 (1): 1 - 15." type="journal article" year="1993">1993b</bibRefCitation>
; this study). The shape and position of this lamella indicates its homology with the upturned lobe found in this location in species of
<taxonomicName authorityName="Bruce" authorityYear="1986" box="[1727,1905,1401,1439]" class="Malacostraca" family="Cirolanidae" genus="Booralana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1727,1905,1401,1439]" italics="true" pageId="2" pageNumber="21">Booralana</emphasis>
</taxonomicName>
(see Camp &amp;
<collectingCountry box="[2156,2259,1401,1439]" name="Heard Island and McDonald Islands" pageId="2" pageNumber="21">Heard</collectingCountry>
, 1988, figs 4A-E;
<bibRefCitation author="Keable, S. J." box="[1588,1834,1446,1485]" pageId="2" pageNumber="21" refId="ref6200" refString="Keable, S. J., 1996 b. Revision of the taxonomy, systematics and biogeography of Natatolana (Crustacea: Isopoda: Cirolanidae). UnpubJished PhD thesis, Macquarie University, pp. 751." type="book" year="1996">Keable, 1996b</bibRefCitation>
). While
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[1977,2132,1446,1485]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1977,2132,1446,1485]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
has not been placed in a subfamily these additional characters further suggest a close relationship with
<emphasis box="[1831,2199,1538,1577]" italics="true" pageId="2" pageNumber="21">
<taxonomicName authorityName="Bruce" authorityYear="1986" box="[1831,2007,1538,1577]" class="Malacostraca" family="Cirolanidae" genus="Booralana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">Booralana</taxonomicName>
.
<taxonomicName authorityName="Bruce" authorityYear="1986" box="[2028,2199,1538,1577]" class="Malacostraca" family="Cirolanidae" genus="Booralana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">Booralana</taxonomicName>
</emphasis>
has also beenlinked
<emphasis box="[1552,1835,1584,1623]" italics="true" pageId="2" pageNumber="21">withBathynomus,</emphasis>
<taxonomicName authority="Barnard, 1924" authorityName="Barnard" authorityYear="1924" class="Malacostraca" family="Cirolanidae" genus="Parabathynomus" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1845,2120,1584,1623]" italics="true" pageId="2" pageNumber="21">Parabathynomus</emphasis>
<bibRefCitation author="Barnard, K. H." pageId="2" pageNumber="21" pagination="1 - 4" refId="ref5505" refString="Barnard, K. H., 1924. Description of a new genus and species of isopod crustacean belonging to the isopod family Bathynomidae, procured in South African marine survey. Fisheries Marine Biological Survey special report 2: 1 - 4." type="book chapter" year="1924">Barnard, 1924</bibRefCitation>
</taxonomicName>
and
<taxonomicName authority="Hurley, 1957" authorityName="Hurley" authorityYear="1957" box="[1460,2122,1630,1669]" class="Malacostraca" family="Cirolanidae" genus="Cirolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="species" species="quadripustulata">
<emphasis box="[1460,1879,1630,1669]" italics="true" pageId="2" pageNumber="21">Cirolana quadripustulata</emphasis>
<bibRefCitation author="Hurley, D. E." box="[1895,2122,1630,1669]" pageId="2" pageNumber="21" pagination="1 - 20" refId="ref6079" refString="Hurley, D. E., 1957. Some Amphipoda, Isopoda and Tanaidacea from Cook Strait. Zoological Publications of Victoria University Wellington 21: 1 - 20." type="journal article" year="1957">Hurley, 1957</bibRefCitation>
</taxonomicName>
(
<bibRefCitation author="Bruce, N. L." pageId="2" pageNumber="21" pagination="945 - 966" refId="ref5647" refString="Bruce, N. L., 1981 a. Cirolanidae (Crustacea: Isopoda) of Australia: diagnoses of Cirolana Leach, Metacirolana Nierstrasz, Neocirolana Hale, Anopsilana Paulian &amp; Debouteville, and three new genera-Natatolana, Politolana and Cartetolana. Australian Journal ofMarine and Freshwater Research 32: 945 - 966." type="journal article" year="1981">Bruce, 1981a</bibRefCitation>
, b, 1986; Botosaneanu
<emphasis box="[1800,1892,1676,1715]" italics="true" pageId="2" pageNumber="21">et aI.,</emphasis>
1986;
<bibRefCitation author="Wagele, J. - W." box="[2015,2248,1676,1715]" pageId="2" pageNumber="21" pagination="1 - 262" refId="ref6782" refString="Wagele, J. - W., 1989. Evolution und phylogenetisches System der Isopoda. Zoologica 140: 1 - 262." type="journal article" year="1989">Wagele, 1989</bibRefCitation>
).
<taxonomicName authorityName="A. Milne Edwards" authorityYear="1879" box="[1284,1486,1722,1761]" class="Malacostraca" family="Cirolanidae" genus="Bathynomus" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1284,1486,1722,1761]" italics="true" pageId="2" pageNumber="21">Bathynomus</emphasis>
</taxonomicName>
and
<taxonomicName authorityName="Barnard" authorityYear="1924" box="[1574,1850,1722,1761]" class="Malacostraca" family="Cirolanidae" genus="Parabathynomus" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1574,1850,1722,1761]" italics="true" pageId="2" pageNumber="21">Parabathynomus</emphasis>
</taxonomicName>
have been placed in the subfamily
<taxonomicName authority="Dana, 1852" authorityName="Dana" authorityYear="1852" box="[1459,1844,1768,1807]" pageId="2" pageNumber="21" rank="subFamily" subFamily="Cirolaninae">
Cirolaninae
<bibRefCitation author="Dana, J. D." box="[1657,1844,1768,1807]" pageId="2" pageNumber="21" pagination="297 - 316" refId="ref5995" refString="Dana, J. D., 1852. On the classification of the Crustacea Choristopoda or Tetradecapoda. American Journal of Science and Arts, second series 14 (41): 297 - 316." type="journal article" year="1852">Dana, 1852</bibRefCitation>
</taxonomicName>
while C.
<taxonomicName authorityName="Hurley" authorityYear="1957" box="[2013,2266,1768,1807]" class="Malacostraca" family="Cirolanidae" genus="Cirolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="species" species="quadripustulata">
<emphasis box="[2013,2266,1768,1807]" italics="true" pageId="2" pageNumber="21">quadripustulata</emphasis>
</taxonomicName>
remains
<emphasis box="[1426,1655,1814,1853]" italics="true" pageId="2" pageNumber="21">incertae sedis.</emphasis>
However, according to
<bibRefCitation author="Bruce, N. L." pageId="2" pageNumber="21" pagination="1 - 239" refId="ref5747" refString="Bruce, N. L., 1986. Cirolanidae (Crustacea: Isopoda) ofAustralia. Records of the Australian Museum Supplement 6: 1 - 239." type="journal article" year="1986">Bruce (1986: 223)</bibRefCitation>
C.
<taxonomicName authorityName="Hurley" authorityYear="1957" box="[1435,1704,1860,1899]" class="Malacostraca" family="Cirolanidae" genus="Cirolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="species" species="quadripustulata">
<emphasis box="[1435,1704,1860,1899]" italics="true" pageId="2" pageNumber="21">quadripustulata</emphasis>
</taxonomicName>
also shares characters found in
<taxonomicName authority="Bruce, 1981 a" authorityName="Bruce" authorityYear="1981" box="[1282,1701,1906,1945]" class="Malacostraca" family="Cirolanidae" genus="Natatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1282,1472,1906,1945]" italics="true" pageId="2" pageNumber="21">Natatolana</emphasis>
<bibRefCitation author="Bruce, N. L." box="[1481,1701,1906,1945]" pageId="2" pageNumber="21" pagination="945 - 966" refId="ref5647" refString="Bruce, N. L., 1981 a. Cirolanidae (Crustacea: Isopoda) of Australia: diagnoses of Cirolana Leach, Metacirolana Nierstrasz, Neocirolana Hale, Anopsilana Paulian &amp; Debouteville, and three new genera-Natatolana, Politolana and Cartetolana. Australian Journal ofMarine and Freshwater Research 32: 945 - 966." type="journal article" year="1981">Bruce, 1981a</bibRefCitation>
</taxonomicName>
which is placed in the Conilerinae
<bibRefCitation author="Kensley, B. &amp; M. Schotte" box="[1285,1719,1952,1991]" pageId="2" pageNumber="21" refId="ref6344" refString="Kensley, B., &amp; M. Schotte, 1989. Guide to the marine isopod crustaceans of the Caribbean. Smithsonian Institution Press, Washington, pp. 308." type="book" year="1989">Kensley &amp; Schotte, 1989</bibRefCitation>
.
</paragraph>
<paragraph blockId="2.[1280,2269,388,3186]" pageId="2" pageNumber="21">
An additional noteworthy character found in species of
<emphasis box="[1281,1446,2044,2083]" italics="true" pageId="2" pageNumber="21">
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[1281,1440,2044,2083]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">Aatolana</taxonomicName>
,
</emphasis>
which has not been remarked upon previously, is the presence of a large, triangular, highly sclerotized structure imbedded in the body of the left mandible between the setalrow and the incisor (
<figureCitation box="[1911,2008,2181,2220]" captionStart="Fig" captionStartId="4.[379,436,2752,2788]" captionTargetBox="[218,2276,372,2705]" captionTargetPageId="4" captionText="Fig. 1. Aatolana springthorpei, holotype. CE a, band c are dorsal, anterior and lateral views of cephalon, respectively. Scales = 0.5 mm." figureDoi="http://doi.org/10.5281/zenodo.4656733" httpUri="https://zenodo.org/record/4656733/files/figure.png" pageId="2" pageNumber="21">Fig. 1</figureCitation>
). This structure occurs in
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[1451,1600,2228,2267]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="species" species="rapax">
<emphasis box="[1451,1600,2228,2267]" italics="true" pageId="2" pageNumber="21">A. rapax</emphasis>
</taxonomicName>
and the species described here but not
<emphasis box="[1280,1510,2273,2312]" italics="true" pageId="2" pageNumber="21">
<taxonomicName authorityName="Miers" authorityYear="1884" box="[1280,1505,2273,2312]" class="Malacostraca" family="Cirolanidae" genus="Cirolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="species" species="schioedtei">A. schioedtei</taxonomicName>
.
</emphasis>
A similar large triangular structure is found partially fused to the distal side of the setal row on the left mandible of species of
<taxonomicName authorityName="A. Milne Edwards" authorityYear="1879" box="[1677,1883,2365,2404]" class="Malacostraca" family="Cirolanidae" genus="Bathynomus" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1677,1883,2365,2404]" italics="true" pageId="2" pageNumber="21">Bathynomus</emphasis>
</taxonomicName>
(see illustrations of
<taxonomicName authority="A. Milne Edwards, 1879" authorityName="A. Milne Edwards" authorityYear="1879" class="Malacostraca" family="Cirolanidae" genus="Bathynomus" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="species" species="giganteus">
<emphasis italics="true" pageId="2" pageNumber="21">B. giganteus</emphasis>
A.
<bibRefCitation author="Milne Edwards, A." box="[1515,1881,2411,2450]" pageId="2" pageNumber="21" pagination="21 - 23" refId="ref6441" refString="Milne Edwards, A., 1879. Sur un Isopode gigantesque des grandes profondeurs de lar mer. Comptes Rendus Hebdomadaire des Seances de l'Academie des Sciences, Paris 88: 21 - 23." type="journal article" year="1879">Milne Edwards, 1879</bibRefCitation>
</taxonomicName>
by A.
<bibRefCitation author="Milne Edwards, A. &amp; E. L. Bouvier" pageId="2" pageNumber="21" pagination="133 - 175" refId="ref6477" refString="Milne Edwards, A., &amp; E. L. Bouvier, 1902. Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877 - 78), in the Caribbean Sea (1878 - 79), and along the Atlantic coast of the United States (1880), by the U. S. Coast Survey Steamer &quot; Blake &quot;, Lieut. - Corn. C. D. Sigsbee, U. S. N., and Commander J. R. Bartlett, U. S. N., commanding. XL. Les Bathynomes. Memoirs of the Museum of Comparative Zoology, Harvard 27: 133 - 175, pis 1 - 8." type="journal article" year="1902">Milne Edwards &amp; Bouvier (1902</bibRefCitation>
, plate 4) and also
<taxonomicName authority="Bruce, 1986" authorityName="Bruce" authorityYear="1986" box="[1868,2266,2458,2496]" class="Malacostraca" family="Cirolanidae" genus="Bathynomus" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="species" species="immanis">
<emphasis box="[1868,2056,2458,2496]" italics="true" pageId="2" pageNumber="21">B. immanis</emphasis>
<bibRefCitation author="Bruce, N. L." box="[2067,2266,2458,2496]" pageId="2" pageNumber="21" pagination="1 - 239" refId="ref5747" refString="Bruce, N. L., 1986. Cirolanidae (Crustacea: Isopoda) ofAustralia. Records of the Australian Museum Supplement 6: 1 - 239." type="journal article" year="1986">Bruce, 1986</bibRefCitation>
</taxonomicName>
and
<taxonomicName authority="Bruce, 1986" authorityName="Bruce" authorityYear="1986" box="[1357,1713,2503,2542]" class="Malacostraca" family="Cirolanidae" genus="Bathynomus" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="species" species="pelor">
<emphasis box="[1357,1496,2503,2542]" italics="true" pageId="2" pageNumber="21">B. pelor</emphasis>
<bibRefCitation author="Bruce, N. L." box="[1509,1713,2503,2542]" pageId="2" pageNumber="21" pagination="1 - 239" refId="ref5747" refString="Bruce, N. L., 1986. Cirolanidae (Crustacea: Isopoda) ofAustralia. Records of the Australian Museum Supplement 6: 1 - 239." type="journal article" year="1986">Bruce, 1986</bibRefCitation>
</taxonomicName>
by
<bibRefCitation author="Bruce, N. L." box="[1783,1995,2503,2542]" pageId="2" pageNumber="21" pagination="1 - 239" refId="ref5747" refString="Bruce, N. L., 1986. Cirolanidae (Crustacea: Isopoda) ofAustralia. Records of the Australian Museum Supplement 6: 1 - 239." type="journal article" year="1986">Bruce (1986</bibRefCitation>
, figs 90F, 91F);
<bibRefCitation author="Keable, S. J." box="[1285,1539,2550,2588]" pageId="2" pageNumber="21" refId="ref6200" refString="Keable, S. J., 1996 b. Revision of the taxonomy, systematics and biogeography of Natatolana (Crustacea: Isopoda: Cirolanidae). UnpubJished PhD thesis, Macquarie University, pp. 751." type="book" year="1996">Keable (1996b</bibRefCitation>
, plate 2.2.2). This structure appears to be absent in many other genera of the
<taxonomicName authority="(Keable, 1996 b)" baseAuthorityName="Keable" baseAuthorityYear="1996" class="Malacostraca" family="Cirolanidae" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="family">
Cirolanidae (
<bibRefCitation author="Keable, S. J." pageId="2" pageNumber="21" refId="ref6200" refString="Keable, S. J., 1996 b. Revision of the taxonomy, systematics and biogeography of Natatolana (Crustacea: Isopoda: Cirolanidae). UnpubJished PhD thesis, Macquarie University, pp. 751." type="book" year="1996">Keable, 1996b</bibRefCitation>
)
</taxonomicName>
. The function and phylogenetic significance of this structure is unknown. Although
<bibRefCitation author="Brusca, R. C. &amp; R. Wetzer &amp; S. C. France" box="[1891,2266,2687,2726]" pageId="2" pageNumber="21" pagination="1 - 96" refId="ref5858" refString="Brusca, R. C., R. Wetzer &amp; S. C. France, 1995. Cirolanidae (Crustacea: Isopoda: Flabellifera) of the tropical eastern Pacific. Proceedings of the San Diego Society of Natural History 30: 1 - 96." type="journal article" year="1995">
Brusca
<emphasis box="[2036,2266,2687,2726]" italics="true" pageId="2" pageNumber="21">et al. (1995)</emphasis>
</bibRefCitation>
concluded that a lacinia mobilis is absent in the
<taxonomicName baseAuthorityName="Keable" baseAuthorityYear="1996" box="[1284,1482,2778,2818]" class="Malacostraca" family="Cirolanidae" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="family">Cirolanidae</taxonomicName>
, the morphology and position of this structure in
<taxonomicName authorityName="A. Milne Edwards" authorityYear="1879" box="[1334,1548,2825,2864]" class="Malacostraca" family="Cirolanidae" genus="Bathynomus" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1334,1548,2825,2864]" italics="true" pageId="2" pageNumber="21">Bathynomus</emphasis>
</taxonomicName>
suggest it is homologous to the lacinia mobilis of other peracaridan crustaceans. It also appears to play a similar role as a guiding and locking mechanism for the mandible (
<bibRefCitation author="Dahl, E. &amp; RR Hessler" box="[1605,1995,2962,3001]" pageId="2" pageNumber="21" pagination="133 - 146" refId="ref5956" refString="Dahl, E., &amp; RR Hessler, 1982. The crustacean lacinia mobilis: a reconsideration of its origin, function and phylogenetic implications. Zoological Journal of the Linnean Society 74: 133 - 146." type="journal article" year="1982">Dahl &amp; Hessler, 1982</bibRefCitation>
). This structure cannot act in the same way as a lacinia mobilis in species of
<taxonomicName authorityName="Bruce" authorityYear="1993" box="[1336,1503,3054,3094]" class="Malacostraca" family="Cirolanidae" genus="Aatolana" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">
<emphasis box="[1336,1503,3054,3094]" italics="true" pageId="2" pageNumber="21">Aatolana</emphasis>
</taxonomicName>
because it is embedded in the mandible surface. However, this may represent a transition from the condition found in
<emphasis box="[1619,1834,3147,3186]" italics="true" pageId="2" pageNumber="21">
<taxonomicName authorityName="A. Milne Edwards" authorityYear="1879" box="[1619,1829,3147,3186]" class="Malacostraca" family="Cirolanidae" genus="Bathynomus" kingdom="Animalia" order="Isopoda" pageId="2" pageNumber="21" phylum="Arthropoda" rank="genus">Bathynomus</taxonomicName>
.
</emphasis>
</paragraph>
</subSubSection>
</treatment>
</document>
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