Heteropriapulus pterygoplichthyi, Acosta, Aline Angelina, Franceschini, Lidiane, Zago, Aline Cristina, Scholz, Tomáš & Silva, Reinaldo José Da, 2017

Acosta, Aline Angelina, Franceschini, Lidiane, Zago, Aline Cristina, Scholz, Tomáš & Silva, Reinaldo José Da, 2017, Six new species of Heteropriapulus (Monogenea: Dactylogyridae) from South American fishes with an amended diagnosis to the genus, Zootaxa 4290 (3), pp. 459-482 : 473-475

Heteropriapulus pterygoplichthyi n. sp.

urn:lSid:zOObank.Org:act:2E3883AA-55C0-4088-9E46-B7EC49 F38777 ( Fig. 8 )

Type and only known host. Pterygoplichthys ambrosettii (HOlmberg) ( SilurifOrmeS : LOricariidae ).

Site of infection. GillS.

Type locality. Aguapeí RiVer , municipality Of CaStilhO (Paraná RiVer baSin) , SãO PaulO State , Brazil (21°3'36.20"S, 51°45'38.58"W) .

Type specimens. HOlOtype (CHIOC 38831); 8 paratypeS in CHIOC (38832a,b; 38833–38835; 38836a, b; 38837); 7 paratypeS in CHIBB (CHIBB) and 1 paratype in IPCAS (M-655).

Etymology. The Specific name referS tO the generic name Of itS hOSt SpecieS.

Description. BaSed On 17 SpecimenS: 16 mOunted in HOyer’S medium and 1 Stained With GOmOri’S trichrOme. BOdy 286–550 (405; n=12) lOng, greateSt Width 60–160 (80; n=12), uSually near mid-length. AcceSSOry granuleS eXtending frOm leVel Of gOnadS tO cephalic lObeS. Male cOpulatOry cOmpleX cOmpriSing nOn-articulated cirruS and acceSSOry piece. CirruS delicate, tOtal curVed length 43–50 (47; n=16), Straight in anteriOr pOrtiOn ShOWing 2 cOunterclOckWiSe Spiral ringS neXt tO rOunded baSe. AcceSSOry piece 42–47 (45; n=16) lOng, cOmpOSed Of 2 SubunitS OVerlapping: One Small, leSS SclerOtized and irregularly Shaped, and anOther lOng, rObuSt, cOnSpicuOuS and StrOngly SclerOtized Shaped aS ‘tWO SickleS’ jOinted at baSe ( Fig. 8 C). Vaginal canal ShOrt and SclerOtized, 16–19 (17; n=10) lOng, 17–20 (18; n=10) curVed length, With thickened marginS. HaptOr 39–60 (50; n=12) lOng, 77–113 (87; n=12) Wide, SubtrapezOidal. Ventral anchOrS 21–23 (22; n=17) lOng, length tO nOtch 29–34 (30; n=17), flattened baSe 13–16 (14; n=17) Wide, elOngate Shaft, pOint 25–31 (27; n=17) lOng With recurVed tip eXtending pOSterOVentrally frOm haptOr; anchOr filament dOuble, Well-deVelOped; One SclerOtized patch aSSOciated With baSe Of Ventral anchOr preSent. DOrSal anchOrS 33–37 (34; n=17) lOng, length tO nOtch 26–30 (28; n=17), Well-deVelOped Superficial rOOt 11–13 (12; n=17) lOng, ShOrt deep rOOt 2–4 (3; n=17) lOng, eVenly curVed ShOrt Shaft, Straight pOint 17–19 (18; n=17) lOng. Ventral bar 65–81 (72; n=17) lOng, 7–11 (9; n=17) Wide, 9–20 (14; n=17) high, bent, rOunded endS and incOnSpicuOuS median prOceSS. DOrSal bar bent, 26–32 (29; n=17) lOng, 5–6 (5; n=17) Wide, 8– 12 (10; n=17) high, With Small median prOceSS. SeVen pairS Of Similar hOOkS 12–13 (13) lOng, FH lOOp abOut ½ Of Shank length.

Remarks. Heteropriapulus pterygoplichthyi n. sp. reSembleS H. microcleithrus n. sp. in the pOSSeSSiOn Of an acceSSOry piece cOmpOSed Of tWO SubunitS that OVerlap, With One Small and leSS SclerOtized and anOther lOnger, mOre rObuSt, cOnSpicuOuS and StrOngly SclerOtized. HOWeVer, H. pterygoplichthyi n. sp. differS in the Shape Of the lOnger Subunit Of the acceSSOry piece, Which iS mOre rObuSt than that Of H. microcleithrus n. sp., being repreSented by ‘tWO SickleS’ jOinted at the baSe (cOmpare FigS. 7 E and 8C). Heteropriapulus pterygoplichthyi n. sp. iS alSO typified by haVing an incOnSpicuOuS medial prOceSS On the Ventral and dOrSal barS.

Figures

FIGURE 7. (A – H) Sclerotized structures of Heteropriapulus microcleithrus n. sp. from Pterygoplichthys ambrosettii (Holmberg) from the Upper Paraná River, Brazil. A, ventral anchor. B, dorsal anchor. C, dorsal bar. D, ventral bar. E, male copulatory complex. F, egg. G, hook. H, vagina.

FIGURE 8. (A – I) Sclerotized structures of Heteropriapulus pterygoplichthyi n. sp. from Pterygoplichthys ambrosettii (Holmberg) from the Upper Paraná River, Brazil. A, ventral anchor. B, dorsal anchor. C, male copulatory complex. D, hook. E, vagina. F, G, dorsal bar. H, I, ventral bar.