Redescription of the type-material of creptotrema creptotrema travassos, Artigas & Pereira, 1928 (Digenea, Allocreadiidae)

Abstract

Creptotrema creptotrema Travassos, Artigas & Pereira, 1928, a digenetic trematode parasite of Leporinus elongatus, is redescribed from the type-material with additional morphological data and original figures.<br>Creptotrema creptotrema Travassos, Artigas & Pereira, 1928, trematódeo digenético parasito de Leporinus elongatus, é redescrito do material tipo com novos dados morfológicos e figuras originais

Three new species of Creptotrema (Trematoda, Allocreadiidae) with an amended diagnosis of the genus and reassignment of Auriculostoma (Allocreadiidae), based on morphological and molecular evidence

“…This structure presents as ventral anterior discrete horseshoe-shaped flaps and a discrete single ventrolateral muscular lobe on either side of the oral sucker, stretching from the ventral side to the lateral area, but not extending to the dorsal region, without free dorsal ends. The presence of a tegument, papillous or rugose, on the suckers described by Kohn [ 29 ] was not observed in our light microscopy and SEM analyses.…”

“…Remarks: The original description of C. creptotrema [ 68 ] was revised by Kohn [ 29 ] to resolve inconsistencies about morphological features such as the absence of spines in the tegument (originally described as spinous), and to provide a consistent description of the cirrus sac (absent in the original description). The redescription provided by Kohn [ 29 ] was made based on the same specimens analyzed by Travassos et al [ 68 ], deposited at the Helminthological Collection of the Oswaldo Cruz Institute (CHIOC).…”

“…Morphometrical and morphological analyses of these specimens were performed using a computerized image analysis system with differential interference contrast (DIC) (Leica Application Suite, V3; Leica Microsystems, Wetzlar, Germany). The morphological descriptions followed the recommendations of Travassos et al [ 68 ], Kohn [ 29 ], and observations by Scholz et al [ 58 ] and Razo-Mendivil et al [ 53 ]. All measurements are presented in micrometers (μm) and are expressed as means, followed by the range in parentheses.…”

Digenea de Pimelodus maculatus (Osteichthyes, Pimelodidae) das bacias dos rios São Francisco e Paraná, Brasil

“…Os únicos registros de C. creptotrema foram realizados em Leporinus elongatus de localidade brasileira não especificada 1 e em P. maculatus do Estuário de Guaiba, RS 20 . O tegumento da região das ventosas pode apresentar papilas ou aspecto rugoso, o que teria levado os autores do táxon nominal a confundir essas estruturas com espinhos por ocasião de sua descrição original 21 . Foram observadas papilas na região das ventosas e ausência de espinhos no tegumento dos espécimes de C. creptotrema encontrados em P. maculatus.…”

Dos especies nuevas de Creptotrema (Digenea: Allocreadiidae) de America del Sur

“…In addition, the oral sucker and ventral sucker are nearly equal in size (width ratio=1:0.9-1.1), whereas the oral sucker is always smaller than the ventral sucker in C. creptotrema Travassos, Artigas and Pereira, 1928, C. funduli, C. lynchi Brooks, 1976, C. pati Lunaschi, 1985, and C. agonostomi Salgado-Maldonado, Cabañas-Carranza, and Caspeta-Mandujano, 1998, and always larger than the ventral sucker in C. paraensis Vicente, dos Santos, and de Souza, 1978. Creptotrema lamothei differs further from C. creptotrema by having a body nearly twice as large, measuring 1 150-1 405 long by 359-457 μm wide compared with 466-622 long by 240-390 μm wide, and by having slightly smaller eggs, measuring 51-62 long by 31-34 μm wide compared with 60-78 long by 38-50 μm wide (Travassos et al, 1928;Kohn, 1984). The cirrus sac is arcuate in both C. lamothei and C. creptotrema but extends only to the posterior margin of the ventral sucker in the former and slightly posterior to the ventral sucker in the latter.…”