Glypthelmins parva Travassos, 1924

León, Pérez-Ponce De, 2008, Taxonomic revision of the genus Glypthelmins Stafford, 1905 (Platyhelminthes: Digenea: Plagiorchiida), parasites of anurans in the Americas, Zootaxa 1882, pp. 1-45 : 22-24

Glypthelmins parva Travassos, 1924

( Figs. 9–11 )

Synonyms

Glyphtelmins parva Travassos, 1924: 3 . Fig. 3 ; Glypthelmins quieta, Rankin (1944: 31, 41) [Considers G. parva as a synonym of G. quieta ]; Margeana parva, Cheng (1959: 76, 78–79 and 84) Plate 2: Fig. 1 [Diagnosis]; Choledocystus linguatula, Sullivan (1977b: 168) [Considers G. parva as a synonym of C. linguatula ].

Taxonomic summary

Type-host: Cystygnatus ocellatus (= Leptodactylus ocellatus ).

Habitat: Intestine.

Type-locality: Brazil.

Type specimens deposition: CHIOC 4746.

Diagnosis: This species can be differentiated from other members of Glypthelmins by the combination of the following traits: Pharynx smaller than the ventral sucker, symmetrical or oblique testes, cirrus pouch voluminous, vitelline follicles distributed from the level of genital pore to post-testicular region. At the level of the testes, follicles are confluent dorsally.

Description: Body oval; posterior and anterior ends round. Tegument covered with minute scale-like spines, from the level of oral sucker to the posterior border of testes. Oral sucker subterminal, rounded. Ventral sucker rounded, located in the anterior third of body, preequatorial. Oral sucker/ventral sucker ratio 1:0.49–0.61 in length and 1:0.53–0.64 in width. Prepharynx inconspicuous. Pharynx small, muscular. Oesophagus slightly larger than pharynx. Caeca narrow, and extends posteriorly to almost reach the end of body. Testes oval, intercaecal, symmetrical, located at mid-level of body. Cirrus pouch well-developed, large, cone-shaped, extends from right to left, dorsally to ventral sucker. Cirrus pouch contains a bi-partite seminal vesicle, prostatic gland and a coiled and unarmed cirrus. Cirrus opens into the genital pore. Genital pore medial, preacetabular. Ovary triangular, located sinistrally and dorsal to ventral sucker. Seminal receptacle ovoid located between the ovary and testes. Uterus coiled, mostly intercaecal, with some loops caecal. In testicular region, uterine loops are ventral and well-developed. No uterine loops are located in the pre-testicular region. Metraterm long, muscular, opens into the genital pore. Vitelline follicles distributed into two fields, dorsally and ventrally along the caeca, from the level of caecal bifurcation to the posterior margin of testes. Follicles are confluent dorsally at the testes level. Eggs operculated, yellow, 26–30 µ m long by 11–18 µ m wide. Excretory vesicle I shaped extending to the level of testes. Excretory pore located terminally at the posterior border of body.

Host, geographic distribution and specimen deposition

Hyla leucophyllata (Beireis) : Peru: Reserva del cuzco amazónico, 15 km NE of Puerto Maldonado, Departamento Madre de Dios (Bursey et al. 2001). Specimen deposition: USNPC: 89522.

Leptodactylus ocellatus : Brasil: (locality not spedified) ( Travassos, 1924: 3; Walton 1938: 10; Travassos et al. 1969). Specimen deposition: CHIOC: 4746.

Phrynohyas coriacea (Peters) : Peru: Reserva del cuzco amazónico, 15 km NE of Puerto Maldonado, Departamento Madre de Dios (Bursey et al. 2001). Specimen deposition: USNPC: 89536.

Rana vaillanti : México: Laguna Escondida, Los Tuxtlas, Veracruz, (Pérez-Ponce de León et al et al. 2000: 103); ( Paredes, 2000). Specimen deposition: CNHE: 3391, 4115, 4690.

Scinax pedromedinai (Henle) : Peru: Reserva del cuzco amazónico, 15 km NE of Puerto Maldonado, Departamento Madre de Dios (Bursey et al. 2001). Specimen deposition: USNPC: 89565.

Figures

FIGURE 1. Phylogenetic hypothesis of Razo-Mendivil et al. (2006) showing the placement of Glypthelmins, Rauschiella and Choledocystus within the Plagiorchiforms. The Glypthelmins clade is marked in red.

FIGURES 9 – 11. Glypthelmins parva Travassos, 1930 9. Mature specimen, ventral view ex Rana vaillanti, Veracruz, México (CNHE 3396). Scale bar = 0.3 mm. 10. Mature specimen, ventral view ex Rana vaillanti, Veracruz, México (CNHE 4690). Scale bar = 0.3 mm. 11. Detail of the terminal genitalia ex Rana vaillanti, Veracruz, México (CNHE 4690). Scale bar = 0.1 mm

FIGURES 2 – 5. Glypthelmins quieta (Stafford, 1900) Stafford, 1905. 2. Mature specimen, ventral view ex Rana catesbeiana, Nebraska, U. S. A. (personal collection Dr. Daniel R. Brooks). Scale bar = 0.3 mm. 3. Detail of the anterior end showing the peripharyngeal glands ex Rana neovolcanica, Michoacán, Mexico (CNHE 3272) Scale bar = 0.1 mm. 4. Mature specimen, ventral view ex Rana spectabilis, Oaxaca, Mexico (CNHE 4689). Scale bar = 0.3 mm. 5. Immature specimen ex Rana montezumae, Estado de Mexico, Mexico (CNHE 3275). Scale bar = 0.3 mm.