Head of Poeciliopsis jackschultzi in dorsal, lateral and ventral view (CNP-IBUNAM 23406, holotype, male, 20.3 mm SL). Sensory troughs containing presumptive canal neuromasts outlined in red. Pores in cephalic lateral line sensory canals in green. Small white circles represent superficial neuromasts. White ovals represent presumptive canal neuromasts. Abbreviations: AN, anterior nostril; AST, anterior supraorbital trough; IOC, infraorbital canal; LT, lachrymal trough; MT, mandibular trough; NT, nasal trough; PN, posterior nostril; PopC, preopercular canal; PST, posterior supraorbital trough.