New Trichomycterus
Posted: 30 Nov 2023, 23:48
Ardila Rodríguez, C.A., 2023. Trichomycterus zapatocaensis sp. nov. (Siluriformes: Trichomycteridae) una nueva especie de pez de cueva del departamento de Santander – Colombia. Barranquilla, Departamento del Atlántico, 91: 1-20.
Abstract
Trichomycterus zapatocaensis sp. nov., is a new species of cave, located in Cueva del Nitro, municipality of Zapatoca, 1720 meters above sea level. Department of Santander, Colombia. The new species is differentiated from the others, through the combination of characteristics typical of a troglobial fish, such as skin depigmentation, anophthalmos, others with small black spots, long barbicels, especially the nasal ones (12.3 - 15.7 mm) , reaching the anterior part of the pectoral fin. The pelvic fin surpasses the urogenital papilla. Distance from the beginning of the pelvic fin to the base edge of the caudal fin, reaching the beginning of the pectoral fin, in T. sandovali it reaches the middle of the preoperculum. 35 free vertebrae (35 - 36 in T. sandovali, T. santanderensis and T. guianensis; 34 free vertebrae in T. spelaeus, 33 - 34 in T. donascimientoi, 37 in T. rosablanca). With 12 - 13 ribs. The first pterygiophore of the anal fin, inserted into the haemal spines of vertebrae 16 - 17, in T. sandovali on vertebrae 18 and 19. The first pterygiophore of the dorsal fin between the neural spines of vertebra 21. With 27 - 33 dorsal procurrent rays and 15 - 16 ventral procurrent rays.
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Abstract
Trichomycterus zapatocaensis sp. nov., is a new species of cave, located in Cueva del Nitro, municipality of Zapatoca, 1720 meters above sea level. Department of Santander, Colombia. The new species is differentiated from the others, through the combination of characteristics typical of a troglobial fish, such as skin depigmentation, anophthalmos, others with small black spots, long barbicels, especially the nasal ones (12.3 - 15.7 mm) , reaching the anterior part of the pectoral fin. The pelvic fin surpasses the urogenital papilla. Distance from the beginning of the pelvic fin to the base edge of the caudal fin, reaching the beginning of the pectoral fin, in T. sandovali it reaches the middle of the preoperculum. 35 free vertebrae (35 - 36 in T. sandovali, T. santanderensis and T. guianensis; 34 free vertebrae in T. spelaeus, 33 - 34 in T. donascimientoi, 37 in T. rosablanca). With 12 - 13 ribs. The first pterygiophore of the anal fin, inserted into the haemal spines of vertebrae 16 - 17, in T. sandovali on vertebrae 18 and 19. The first pterygiophore of the dorsal fin between the neural spines of vertebra 21. With 27 - 33 dorsal procurrent rays and 15 - 16 ventral procurrent rays.
Fulltext is available if you have a ResearchGate account.