Caiguiria anterouteria Nasir and Díaz, 1971

Dronen, Norman O., Blend, Charles K. & Davis, Alisha J., 2004, Emendation of the subfamilies Caiguiriinae and Pygidiopsinae (Digenea) with a redescription of Caiguiria anterouteria (Digenea: Heterophyidae) and reassignment of Pygydiopsis crassus to Caiguiria, Zootaxa 417, pp. 1-12 : 6-8

Caiguiria anterouteria Nasir and Díaz, 1971 ( Figs. 1–3 )

Type­host: Experimental infection of domestic cat with metacercariae from guppy, Poecilia reticulata (Peters) .

Other hosts: Tringa melanoleuca Gmelin ; greater yellowlegs.

Site: Small intestine.

Type­locality: San Juan de Macarapana, Venezuela; 8° 49’N, 64° 19’W; altitude = 37m.

Other Localities: Laguna de Los Patos, Venezuela; 10° 28’N, 64° 10’W; altitude = 4m.

Deposited Specimens: Deposited by Nasir and Díaz (1971), Holotype USNPC 071427.00; deposited by Fischthal and Nasir (1974), voucher specimens USNPC 0 68108.0 0, 0 72784.0 1, 0 72784.0 2.

Description. Based on 4 adult specimens. With characteristics of genus as emended. Body small, fusiform to oval, spinose, 680 (625–765) long by 240 (175–275) wide; forebody 350 (210–410) long; remnants of cercarial eyespots present near anterior end. Mouth subterminal; oral sucker unarmed, 110 (90–125) by 105 (95–120); prepharynx 60 (45–75) long; pharynx 65 (55–75) by 40 (35–50); esophagus shorter than prepharynx, 50 (35–55) long; cecal bifurcation approximately 2/3 the distance down forebody; ceca moderately long, terminating about 2/3 the distance to posterior extremity. Ratio of widths of oral sucker and pharynx 1:2.6. Acetabulum smaller than oral sucker, 80 (75–90) by 85 (75– 95). Ratio of sucker widths 1:0.8. Testes smooth, side by side, removed from posterior end by a short distance leaving a posttesticular space that occupies posterior 1/6 of body. Right testis 90 (70–105) by 80 (60–95); left testis 90 (60–115) by 70 (65–80). Male terminal genitalia simple, composed of a reduced pars prostatica 60 (45–65) by 15 (10–20) and an ejaculatory duct. Cirrus absent. Prostate cells present, surrounding narrow isthmus just behind pars prostatica immediately followed by large seminal vesicle extending posteriorly from the midacetabular region to the midovarian level, 185 (110–220) by 35 (20–45). Acetabulogenital complex immediately preacetabular, composed of a transversely elongate genital atrium that receives separately a simple metraterm, proximal end of ejaculatory duct and gonotyl before opening ventrally at anterior margin of acetabulum through a large, slit­like genital pore. Gonotyl highly folded, slightly sinistral to midline of body, situated in an oval chamber, 45 (40–50) by 20 (15–30). Ovary smooth, situated a short distance anterior to right testis, 70 (65–75) by 70 (60–85). Seminal receptacle spherical, 80 (35–95) by 70 (50–85), very extensive in fully developed specimens, occupying the anterior aspect of the intertesticular region. Laurer’s canal present, opening not observed. Vitelline follicles relatively large, 10 to 12 per side, individual follicles often subdivided, distributed from level of posterior margin of acetabulum to anterior margin of testes, rarely overlapping testes but not extensively invading posttesticular space. Uterus extensive, largely postacetabular but having uterine loops on each side extending anteriorly to the level of pharynx in fully developed specimens, many loops overreaching ceca laterally approaching body wall, but not extending posteriorly to ovary. Eggs 21 (18–23) by 10 (9– 12) (n=20). Excretory vesicle Y­shaped with 1 pair of additional lateral branches in posttesticular space. Excretory pore subterminal.

Figures

FIGURES 1 – 3. 1, Caiguiria anterouteria from experimental infections of kittens by Nasir & Díaz (1971) from Venezuela, ventral view of holotype; 2, Male genital complex of C. anterouteria; 3, Female genital complex of C. anterouteria. Abbreviations: A, acetabulum; F, vitelline follicles; G, gonotyl; L, Laurer’s canal; M, Mehlis’ gland; O, ovary; R, seminal receptacle, S, seminal vesicle; T, testis; U, uterus; V, excretory vesicle. Scale bars: 1, 146 m; 2, 90 m; 3, 120 m.