<documentid="B334F33437C0F3234E5E43450DD194FA"ID-DOI="http://dx.doi.org/10.3897/zookeys.247.3698"ID-GBIF-Dataset="cf0233a4-ecc2-43da-8674-8f01d38cd9a0"ID-PMC="PMC3520137"ID-Pensoft-Pub="1313-2970-247-1"ID-PubMed="23275753"ModsDocAuthor=""ModsDocDate="2012"ModsDocID="1313-2970-247-1"ModsDocOrigin="ZooKeys 247"ModsDocTitle="Four new species of splanchnotrophid copepods (Poecilostomatoida) parasitic on doridacean nudibranchs (Gastropoda, Opistobranchia) from Japan, with proposition of one new genus"checkinTime="1451247889117"checkinUser="pensoft"docAuthor="Uyeno, Daisuke & Nagasawa, Kazuya"docDate="2012"docId="ED38478E8B5B051F0780010F776D6D17"docLanguage="en"docName="ZooKeys 247: 1-29"docOrigin="ZooKeys 247"docSource="http://dx.doi.org/10.3897/zookeys.247.3698"docTitle="Majimun Uyeno & Nagasawa, 2012, gen. n."docType="treatment"docVersion="5"lastPageNumber="9"masterDocId="89687F48FFA9FFA0FFE3BB605F3EFFB2"masterDocTitle="Four new species of splanchnotrophid copepods (Poecilostomatoida) parasitic on doridacean nudibranchs (Gastropoda, Opistobranchia) from Japan, with proposition of one new genus"masterLastPageNumber="29"masterPageNumber="1"pageNumber="8"updateTime="1732707816499"updateUser="ExternalLinkService">
<mods:titleid="8AB1AAD082FA7D6B78674F6D0DF11144">Four new species of splanchnotrophid copepods (Poecilostomatoida) parasitic on doridacean nudibranchs (Gastropoda, Opistobranchia) from Japan, with proposition of one new genus</mods:title>
<subSubSectionid="1083C1A2799B1537CEA3ECFB61D22B49"lastPageId="8"lastPageNumber="9"pageId="7"pageNumber="8"type="diagnosis of adult female">
<paragraphid="7667759746658AFDA5799D72E3116DBE"pageId="7"pageNumber="8">Diagnosis of adult female.</paragraph>
<paragraphid="D58F6A697955DBF59EF685AF4FBCAFFF"pageId="7"pageNumber="8">Body elongate, comprising long prosome with 3 pairs of lateral processes and 3-segmented urosome. Prosome composed of anterior region (cephalosome), middle region (including first and second pedigerous somites), and posterior region (including third and fourth pedigerous somites). Cephalosome elongate. Middle region elongate, about twice as long as wide, without posterolateral processes. Posterior region elongate. Lateral processes long and slender. Urosome small; genital double somite cylindrical, narrower at mid region, bearing paired apertures with slightly prominent posterolateral corners; opercula bearing small shield-like structure with 2 spiniform processes. Caudal rami small, bearing 6 setae; apical seta styliform.</paragraph>
<paragraphid="D6067FEE6B01D5931431C0F31476601A"pageId="7"pageNumber="8">Antennule 3-segmented bearing spiniform elements; proximal segment subdivided into basal part with 4 spines and distal part with 3 elements; middle segment bearing 3 elements; terminal segment bearing 11 elements. Antenna 3-segmented; coxo-basis broad, bearing 1 medial spiniform element; proximal segment of endopod bearing 1 inner spiniform element; terminal segment of endopod drawn out into strong apical claw, with 4 and 1 elements along outer and inner margins, respectively. Labrum bilobate, bearing paired extra lobes and small central, conical protrusion. Mandible spatulate, drawn out into blade with 3 dentiform processes. Maxillule not observed. Paragnath bulbous lobe. Maxilla 2-segmented; syncoxa unarmed; allobasis tapering into curved process, with seta. Maxilliped absent. Labium bearing single pointed process, small paired protrusions ornamented with spinules, and posterolateral patches of spinules.</paragraph>
Legs 1 and 2 composed of protopod largely incorporated into ventral wall of prosome, with exopodal and endopodal lobes; protopod bearing outer basal seta, small
at base of endopodal lobe of leg 1; exopodal lobe indistinctly 2-segmented, tapering into spiniform apical process; endopodal lobe cylindrical bearing apical process. Leg 3 represented by conical process with apical seta.
<subSubSectionid="46222EEAD73153D429D5EC7B9F5976ED"pageId="8"pageNumber="9"type="diagnosis of adult male">
<paragraphid="2C1D71855835CB5CEECC18AA1AEE0E6F"pageId="8"pageNumber="9">Diagnosis of adult male.</paragraph>
<paragraphid="309934DC6CDA807C168D9101565CFEAA"pageId="8"pageNumber="9">Body cyclopiform, composed of cephalothorax and 5 cylindrical somites. Cephalothorax large, bulbous, incorporating first and second pedigerous somites, bearing transverse constriction posterior to mouth parts and paired posterolateral outgrowth. Genital somite bearing paired apertures; opercula unarmed. Caudal rami conical, about as long as wide, bearing 6 setae; apical seta styliform. No marked sexual dimorphism in antennule and mouth parts. Shape of antenna as in female except terminal endopodal segment bearing 5 elements; inner margin bearing 2 of 5 elements. Mandible elongate, drawn out into spatulate apical blade with 3 dentiform processes.</paragraph>
<paragraphid="072545EE8B273999355837201CD9C4ED"pageId="8"pageNumber="9">Legs 1 and 2 composed of round protopod with outer basal seta, indistinctly 2-segmented exopodal lobe drawn out into pointed process, and non-segmented endopodal segment with apical small process. Leg 3 represented by conical process with apical seta.</paragraph>
gen. n. in having a 2-segmented urosome comprising the genital double somite and the anal somite (vs. a 3-segmented urosome and the genital double somite separated from the abdomen) (
<bibRefCitationid="8576132AEBD29E52ABD426A79238D8B3"author="Huys, R"journalOrPublisher="Journal of Crustacean Biology"pageId="13"pageNumber="14"pagination="106 - 156"title="Splanchnotrophid systematics: a case of polyphyly and taxonomic myopia."url="10.1651/0278-0372(2001)021[0106:SSACOP]2.0.CO;2"volume="21"year="2001">Huys 2001</bibRefCitation>
spp. share a 3-segmented urosome, which includes 1 postgenital somite (vs. 2 somites). There are also differences in the following female characters between
and the new genus: the antennule is 2-segmented (vs. 3-segmented); the mandible consists of a small rod tipped with a short tooth and a slender spine (vs. drawn out into a blade with dentiform processes); the paragnath is absent (vs. present); the maxillule is made of a lobe with 2 setae (vs. absent); and the maxilla has the allobasis drawn out into a multipinnate endite with 2 accessory elements (vs. with the allobasis drawn out into a curved process with 1 seta)(see
<bibRefCitationid="638A4ACD6C67A50EAADE91739F5FA8BB"author="Ho, JS"journalOrPublisher="Journal of Crustacean Biology"pageId="13"pageNumber="14"pagination="130 - 136"title="Ismaila occulta, a new species of poecilostomatoid copepod parasitic in a dendronotid nudibranch from California."url="10.2307/1548210"volume="1"year="1981">Ho 1981</bibRefCitation>
<bibRefCitationid="6A86499BB3D691A72C8ECAD32E0E3C4A"author="Haumayr, U"journalOrPublisher="Spixiana"pageId="13"pageNumber="14"pagination="1 - 33"title="Revision of the endoparasitic copepod genus Ismaila Bergh, 1867, with description of eight new species (Copepoda, Poecilostomatoida, Splanchnotrophidae)."volume="26"year="2003">
gen. n. does not show distinct sexual dimorphism in the antennule, the antenna, and the mouth parts. The new genus also possesses a 3-segmented antennule, the mandible, and the paragnath in both sexes and 2 postgenital somites in females. These characters are not shared with
<bibRefCitationid="7BA13BFD5B9DBBCDA37A73BCFA535B1B"author="Huys, R"journalOrPublisher="Journal of Crustacean Biology"pageId="13"pageNumber="14"pagination="106 - 156"title="Splanchnotrophid systematics: a case of polyphyly and taxonomic myopia."url="10.1651/0278-0372(2001)021[0106:SSACOP]2.0.CO;2"volume="21"year="2001">Huys 2001</bibRefCitation>
differs from the new genus by having the following characters in both sexes: the antennule is composed of 4 distinct segments (vs. 3 segments); the antenna is conical (vs. elongate); the mandible is covered with numerous spinules (vs. spatulate bearing a blade with dentiform processes around apex); and the maxilla possesses a lanceolate process without armature (vs. with process and 1 seta) (see
<bibRefCitationid="94DF32EC867DF8B16549F259DE2E647C"author="Huys, R"journalOrPublisher="Journal of Crustacean Biology"pageId="13"pageNumber="14"pagination="106 - 156"title="Splanchnotrophid systematics: a case of polyphyly and taxonomic myopia."url="10.1651/0278-0372(2001)021[0106:SSACOP]2.0.CO;2"volume="21"year="2001">Huys 2001</bibRefCitation>
