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Research Article

Table 5

Morphological differences among valid species of Creptotrema (Trematoda, Allocreadiidae).

Valid species Body shape Oral lobes Relative sucker size Testes shape Testes position Vitelline follicles Cirrus-sac posterior extent Genital pore position Uterus extent/Eggs
Creptotrema creptotrema Round to elongated Ventral, horseshoe-shaped, not extending to dorsal region Oral smaller than ventral Oval to elongated; entire margins Symmetrical to oblique; intracecal (rarely one extracecal) Extracecal, cecal and intracecal; separated into two lateral fields Exceeds slightly the length of the ventral sucker At level of ceca bifurcation Pretesticular, inter-cecal/Eggs between testis and genital pore, but may exceed the testicular region
Creptotrema macrorchis comb. n. Lanceolated Stretching from the ventrolateral to the dorsolateral side Nearly equal Irregular; slightly lobed margins Tandem Extracecal in the pretesticular region; scarcely confluent in post-testicular region Exceeds the posterior margin of the ventral sucker, reaches the ovarian level Posterior to ceca bifurcation; preacetabular Pretesticular, inter-cecal/Eggs between genital pore and anterior to testes
Creptotrema platense comb. n. Elongated Stretching from the ventrolateral to the dorsolateral side Nearly equal Oval; entire margins Oblique Extracecal in the pretesticular region; not confluent in post-testicular region Not reaching beyond the posterior margin of the ventral sucker Between the anterior margin of the ventral sucker and ceca bifurcation Intertesticular, intercecal/Few eggs at the testicular level
Creptotrema stenopteri comb. n. Elongated Stretching from the ventrolateral to the dorsolateral side Oral slightly smaller than ventral Irregular; slightly lobed margins Tandem Extracecal in the pretesticular region; not confluent in post-testicular region Exceeds the posterior margin of the ventral sucker, reaches the ovarian level Anterior to the ceca bifurcation Pretesticular, intercecal/Eggs between genital pore and anterior to testes
Creptotrema lynchi Oval to elongated Dorsolateral Oral smaller than ventral Elongated; entire margins Symmetrical to slightly oblique; intracecal Extracecal, cecal and few intercecal follicles; separated into two lateral fields Exceeds the posterior margin of the ventral sucker At level of ceca bifurcation Pretesticular, intercecal or may extend extracecal/Eggs between genital pore and testes region
Creptotrema paraense Elongated Ventrolateral Oral larger than ventral Subspherical; entire margins Tandem; intracecal Irregular, Cecal and intracecal, separated into two lateral fields, partially confluent in cecal bifurcation region and confluent in post-testicular region Exceeds the posterior margin of the ventral sucker Anterior to ceca bifurcation Pretesticular/Eggs between genital pore and anterior to testes
Creptotrema pati Oval Dorsolateral Nearly equal Elongated; entire margins Symmetrical to oblique; extracecal Mostly extracecal; few cecal and intracecal; separated into two lateral fields Exceeds the posterior margin of the ventral sucker Posterior to the ceca bifurcation; preacetabular Inter-testicular, intercecal/Eggs between genital pore and may exceeds testes
Creptotrema astyanace comb. n. Elongated Stretching from the ventrolateral to the dorsolateral side Oral slightly large than ventral Oval; entire margins Tandem Extra- and intracecal; separated into two lateral fields, confluent in post-testicular region Exceeds the posterior margin of the ventral sucker, reaches the ovarian level Posterior to the ceca bifurcation; preacetabular Pretesticular/Eggs between genital pore and anterior to testes
Creptotrema lamothei Elongated Ventral Nearly equal Irregular (lobate margin in larger individuals) Oblique Mostly extracecal; few cecal and intracecal; separated into two lateral fields, confluent in post-testicular region Reaches the posterior margin of the ventral sucker At level of ceca bifurcation Pretesticular, intercecal/Eggs between genital pore and anterior to testes
Creptotrema sucumbiosa Elongated Ventral Oral slightly smaller than ventral Elongated; entire margins Oblique Mostly extracecal; few cecal and intracecal; separated into two lateral fields, confluent in post-testicular region Exceeds the posterior margin of the ventral sucker, reaches the ovarian level At level of ceca bifurcation Intertesticular, intercecal/Eggs between genital pore and testes
Creptotrema diagonale comb. n. Elongated Stretching from the ventrolateral to the dorsolateral side Oral slightly smaller than ventral Elongated; entire margins Oblique (contiguous or not) Surround ceca, separated into two lateral fields, confluent in post-testicular Exceeds the ovarian level At level of ceca bifurcation Intercecal, between ventral sucker and testes/Eggs intruding into testicular level
Creptotrema foliaceum comb. n. Elongated Stretching from the ventrolateral to the dorsolateral side Oral larger than ventral Irregular margins Tandem Extra, cecal and intracecal; separated into two-fields region, confluent in post-testicular region Exceeds the posterior margin of the ventral sucker, reaches the ovarian level Slightly posterior to the ceca bifurcation level Pretesticular, intercecal/Eggs between genital pore and anterior to testes
Creptotrema totonacapanense comb. n. Elongated Stretching from the ventrolateral to the dorsolateral side Oral slightly smaller than ventral Oval; entire margins Oblique Extra and intracecal; separated into two lateral fields, not (or scarcely) confluent in post-testicular region Exceeds the posterior margin of the ventral sucker, reaches the ovarian level At level of ceca bifurcation Intertesticular, intercecal/Eggs between genital pore and anterior testes
Creptotrema lobata comb. n. Elongated Stretching from the ventrolateral to the dorsolateral side Oral slightly smaller than ventral Deeply lobed Tandem Extra, cecal, and intracecal; separated into two lateral fields, confluent in post-testicular region Exceeds the ovarian level Slightly posterior to the ceca bifurcation level Pretesticular, intercecal/Eggs between genital pore and anterior to testes
Creptotrema tica comb. n. Elongated Stretching from the ventrolateral to the dorsolateral side Oral slightly larger than ventral Oval; entire margins Oblique Extra and intracecal; separated into two lateral fields, confluent in post-testicular region Exceeds the posterior margin of the ventral sucker, reaches the ovarian level Anterior to the ceca bifurcation Pretesticular, intercecal/Eggs between genital pore and posterior border of anterior testis
Creptotrema guacurarii comb. n. Elongated Discrete, on both sides, not extent to dorsal region Oral slightly smaller than ventral Elongated; entire margins Oblique Extra and intracecal; separated into two lateral fields, not confluent in post-testicular region Exceeds the posterior margin of the ventral sucker, reaches the ovarian level At level of ceca bifurcation Pre- and inter-testicular, intercecal/Eggs between genital pore and mid-level of testes
Creptotrema conconae n. sp. Elongated Stretching from the ventrolateral to the dorsolateral side Oral larger than ventral Round; entire margins Tandem Extracecal; cecal and intracecal; separated into two lateral fields, confluent in post-testicular region Exceeds the posterior margin of the ventral sucker, reaches the ovarian level Slightly posterior to the intestinal ceca bifurcation Pretesticular, intercecal/Eggs between genital pore and anterior to testes
Creptotrema schubarti n. sp. Oval to elongated Ventral (Discrete ventrolateral) Oral smaller than ventral Elongated; entire margins Symmetrical to oblique Extra, cecal and intracecal; separated into two lateral fields, not (or scarcely) confluent in post-testicular region Exceeds the posterior margin of the ventral sucker At level of ceca bifurcation Intertesticular, inter-extracecal/Eggs between genital pore and may exceed the testicular region
Creptotrema megacetabularis n. sp. Oval to elongated Ventral, horseshoe-shaped, not extending to dorsal region Oral smaller than ventral Elongated; entire margins Symmetrical Mostly extracecal and cecal; separated into two lateral fields, not (or scarcely) confluent in post-testicular region May exceed the posterior margin of the ventral sucker At level of ceca bifurcation Intertesticular, intracecal/Eggs between genital pore and rarely exceed the testicular region