Pseudonematophila ovalis, Lenis, Carolina & Vélez, Imelda, 2011

Lenis, Carolina & Vélez, Imelda, 2011, Digeneans in Trachemys callirrostris callirostris and Podocnemis lewyana (Testudinata) from the Magdalena River, Colombia: description of Pseudonematophila n. gen. and amendment of Nematophila Travassos, 1934 (Cladorchiidae: Schizamphistominae), Zootaxa 3095, pp. 49-62 : 52-53

Pseudonematophila ovalis n. gen., n. comb.

( Figs. 2–3 ).

Host: Podocmenis lewyana

Site of infection: Stomach

Accesion numbers: CCH.116. (125; 126; 127) Localities: San Nicolás (9° 8'17.20"N; 74°38'59.42" O); Ricaurte (9°7'7.63"N; 74°11'40.83" O).

Redescription: Based on 15 specimens: Body 8.23–17.15 (9.80 ± 3.25) long by 4.58–8.88 (5.32 ± 1.57) wide. Tegument without spines; papillae ventral from posterior level of genital sucker to posterior end of the body, its number and size increase towards the acetabulum. Tegument thin on fields lateral, extend from pharyngeal level to acetabulum. Pharynx 0.42–1.0 (0.64 ± 0.19) long by 0.42–0.66 (0.49 ± 0.08) wide; tiny extramural pharyngeal sacs. Oesophagous large, coiling to extended; oesophageal bulb 0.78–1.08 (0.91 ± 0.10) long by 0.30–0.48 (0.37 ± 0.06) wide. Caeca slightly sinuous, ending in the second third of the body. Genital sucker bifurcal to inmediatly postbifurcal, 0.43–0.71 (0.54 ± 0.10) long by 0.49–0.69 (0.56 ± 0.08) wide. Testes in mid – region of body, in tandem, intercaecal, lobed to branched, may be threadlike extensions. Anterior testis 1.31–1.47 (0.92 ± 0.27) long by 1.31–1.65 (1.40 ± 0.17) wide; posterior testis 0.90–1.51 (1.09 ± 0.20) long by 1.16–1.79 (1.34 ± 0.21) wide. Cirrus sac 0.29–0.58 (0.38 ± 0.11) long by 0.22–0.29 (0.26 ± 0.03) wide. Ovary small, round to lobed, between the posterior testis and acetabulum, to level of caeca ends 0.14–0.24 (0.19 ± 0.03) long by 0.15–0.19 (0.16 ± 0.02) wide. Ootype small, dorsal to ovary. Uterus intercaecal, form transverse coils and dorsal to testes. Eggs 111.44–123.38 (119.40 ± 4.67) long by 79.60–89.55 (83.58 ± 4.67) wide. Vitelline follicles small and usually not numerous. Acetabulum ventral, subterminal, medium; aperture oval to longitudinal, 1.39–2.41 (1.73 ± 0.33) long by 1.37– 2.05 (1.55 ± 0.24) wide. Excretory vesicle V – shaped, pore dorsal to anterior margin of acetabulum.

Figures

FIGURE 2. Pseudonematophila ovalis n. gen. n. comb. from Podocnemis lewyana, Colombia. a. Specimen adult, ventral view. Scale 1 mm. b. Details of genital sucker and genitalia with the cirrus everted, sagital section. Scale 0.25 mm. c. Details of genitalia and tegumentary papillae. Scale 0.25 mm.

FIGURE 3. Pseudonematophila ovalis n. gen. n. comb. a. Adult specimen, testes lobed with few threadlike extensions and numerous vitelline follicles, ventral view, scale 1 mm. b. Immature specimen, testes branched in numerous threadlike extensions and few vitelline follicles, ventral view, scale 1 mm. c. Ventral papillae in middle region of body, its number and size increase towards the acetabulum, sagital section. d. Papillae distribution in hindbody, ventral view. e. Detail of genital sucker, sagital section. f. Genitalia with the cirrus everted, oesophageal bulb, sagital section. Scale 0.25 mm.