Metapolystoma ansuanum Landman & Verneau & Raharivololoniaina & Preez 2021, n. sp.
Creators: name: Landman, Willem
name: Verneau, Olivier
name: Raharivololoniaina, Liliane
name: Preez, Louis du
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Platyhelminthes
Monogenea
Polystomatidea
Polystomatidae
Metapolystoma
Metapolystoma ansuanum

description: 3.1.3. Metapolystoma ansuanum n. sp. (Fig. 8‒9; Table 2)
3.1.3.1. Type host. Boophis luteus (Mantellidae).
3.1.3.2. Type locality. Cascade des Nymphes, Isalo National Park, Madagascar (Fig. 1), (22.46977S; 45.260701E).
3.1.3.3. Site in host. Urinary bladder.
3.1.3.4. Level of infection. One of nine frogs collected were infected with two mature parasites (prevalence 11.1%).
3.1.3.5. Type material. The morphological descriptions are based on two mature parasites (Holotype NMBP 569; Paratype NMBP 570) collected from the same locality in Cascade des Nymphes. The type material was deposited in the parasitic worm collection, National Museum, Aliwal Street, Bloemfontein 9301.
3.1.3.6. Zoobank registration. The Life Science Identifier (LSID) of the article is: 59F6A99A-C667-48 EB-9EA4-881D43956065. The LSID of the
169
3.1.3.8. Description. Measurements reflected in Table 2. Body pyriform (Fig. 8), dorsoventrally flat, ventrally concave, widest section at position 16–65% from anterior end of body. Body length 2.6–2.8 times greater than width. Mouth sub-ventral, surrounded by false oral sucker. Posterior haptor measures 24% of total length, bearing three pairs of haptoral suckers of equal size. Well-developed hamuli positioned between posterior-most haptoral suckers with deep cut between handle and guard, hook length Z long relative to Length X (Fig. 9a). Marginal hooklets placed as for other polystomes: pairs one and two between hamuli, pairs three to five embedded in haptoral suckers, pairs six to eight positioned between anterior-most haptoral suckers (Fig. 9b). Medial pharynx length greater than width, positioned immediately posterior to or at margin of false oral sucker. Intestine bifurcates immediately posterior to pharynx at 15–18% from anterior, converging posteriorly at 79–81% from anterior; no prehaptoral anastomoses. Lateral intestinal diverticula length equal to width in anterior half, length greater than width in posterior half. Medial diverticula only posterior to ovary.
Testis follicular, large, kidney-shaped, positioned posterior to ovary, ventral to intestine. Vas deferens widens anteriorly to form sinuous semen vesicle 17–31 (26 ±4; 1) wide, 422 long, measuring 11% of body length, narrowing towards genital bulb, opening in common genital opening. Genital pore opening mid-ventral, posterior to intestinal ceca bifurcation at position 16–18% from anterior, genital bulb muscular, surrounded by glandular cells, armed with genital crown bearing 10 genital spines (Fig. 9c).
Ovary, elongate, not lobed, positioned posterior to midbody, length 2.3–2.7 times greater than width, measuring 9–10% of body length. Oviduct 345 long, 19–39 (28 ±6; 1) wide. Uterus large, occupying one-third of body proper, tubiform, convolute. Uterus contains 41 ovoid, operculate eggs, some contain fully developed oncomiracidia. Intrauterine oncomiracidia present. Mehlis’ gland distinct. Two parallel vaginae, each 94–132 long (119 ±18; 4), 66–81 (75 ±8; 4) wide, found on lateral margins, bearing multiple marginal openings; vaginal vestibule cup-shaped at 21–26% from anterior. Vitellaria dorsal to intestinal tract, extending throughout most of body, except area occupied by female reproductive organs. Genito-intestinal canal prominent, 264 long, 30–40 (37 ± 4; 1) wide, situated directly posterior to ovary.
description: Published as part of Landman, Willem, Verneau, Olivier, Raharivololoniaina, Liliane & Preez, Louis du, 2021, First record of Metapolystoma (Monogenea: Polystomatidae) from Boophis tree frogs in Madagascar, with the description of five new species, pp. 161-178 in International Journal for Parasitology: Parasites and Wildlife 14 on pages 169-170, DOI: 10.1016/j.ijppaw.2021.01.012, http://zenodo.org/record/10668146