Mymarothecioides germanoi Soares and Domingues n. sp.

(Figs. 34–41; 45)

Type host: Hydrolycus armatus (Jardine & Schomburgk) .

Site: Gills.

Type locality: Volta Grande-Xingu River, municipality of Altamira, Pará State, Brazil (03°21’15,7’’S; 52°11’47,5’’W), collected on June 13, 2015.

Prevalence: 100% of three hosts examined.

Mean intensity: 1.3 parasites per infected host.

Specimens deposited: Holotype MPEG nº 199; 3 paratypes, MPEG nº 200–202.

Etymology: The specific name is an homage to the first author’s father (G.B. Soares), Mr. Germano Soares.

Zoobank Life Science Identifier: (LSID) for Mymarothecioides germanoi n. sp. is urn:lsid:zoobank.org:act: A1E9AC7A-02A8-4699-91D0-57F9D24A0EE4

Comparative measurements: see Table 3.

Description (based on four specimens, one mounted in Hoyer, three mounted in Gomori’s trichrome): Body fusiform, total length excluding haptor 360 (280–450; n=3) long, total width at level of germarium 98 (97–100; n=3) (Fig. 34). Cephalic margin tapered; moderately developed terminal lobes; four to five bilateral pairs of head organs with rod-shaped secretion; cephalic glands unicellular, posterolateral to pharynx (observed only in paratypes). Accessory chromatic granules present in the cephalic area. Pharynx subspherical, 26 (24–32; n= 3) long, 19 (14–24; n=3) wide. Testis fusiform, 63 (47–79; n=3) long, 28 (25–32; n=2) wide (observed only in paratypes); prostatic reservoir saculiform, separated into two zones. MCO, 50 (50–51; n=3) long, with distal portion expanded, bent; base of MCO with broad sclerotized margin (Fig. 35; 45). Accessory piece comprising straight rod, distal portion with subterminal flap with hook, thumb. Germarium fusiform, 73 (51–95; n=2) long, 17 (16–19; n=2) wide. Eggs, seminal receptacle, Mehlis’ glands, ootype not observed. Vaginal aperture midventral, opening at level of vitelline commissure; vaginal vestibule heavily muscular; vaginal canal sigmoid. Uterus delicate; seminal receptacle elongated, with dense musculature. Vitelline follicles dense. Peduncle broad; haptor subhexagonal, 74 (67–80; n=3) long, 98 (82–112; n=3) wide. Anchors similar. Ventral anchor, outer 36 (n=2) long, inner 40 (39–41; n= 2) long, base 16 (n=2); superficial root triangular; deep root poorly developed, rounded; evenly curved shaft and point; point extending just past level of tip of superficial root (Fig. 40). Dorsal anchor, outer 34 (33–35; n=2) long, inner 32 (n= 2) long, base 12 (n=2); superficial root triangular with slightly depressed tip; deep root elongated; slightly curved shaft and point; point extending to level of tip of superficial root (Fig. 41). Ventral bar, 54 (49–62; n=3) long, 9 (6–11; n=3) wide, slightly curved to broadly inverted V-shaped rod with anteromedial projection, rounded ends (Fig. 38). Dorsal bar, 55 (54–57; n=3) long, 5 (5–4; n=3) wide, slightly curved rod with anteromedial projection, rounded ends (Fig. 39). Hooks similar in shape, with upright thumb, rounded, slightly curved shaft; short point; shank divided into two units, proximal unit compressed, distal unit inflated; filamentous hook loop not observed; hook pairs 1–4, 6–7, 23 (22– 26; n=7) long (Fig. 36); hook pair 5, 20 (15–16; n=6) long (Fig. 37).

Remarks: Mymarothecioides germanoi n. sp. is similar to M. xinguensis n. sp. based on the morphology of anchor/bar complexes. However, the new species is easily distinguished from M. xinguensis and other congeneric species by possessing a midventral vaginal pore.