而騎士鉛筆燈的產地分佈廣泛, 以下是節錄自seriouslyfish 對該種的產地報告:-
Described from the Peruvian Amazon above Tabatinga, the latter being located in the Três Fronteiras region of Amazonas state, northwestern Brazil, where the borders of Brazil, Peru, and Colombia meet.
It’s since been recorded throughout the central and upper Amazon region in Brazil, Peru, and Colombia including the rios Tapajós, Trombetas, Madeira, Negro, Japurá, Içá, and Putomayo, and is also known from the Orinoco drainage in Venezuela and and Colombia (Guaviare and Inírida tributary systems) plus various rivers of Guyana including the Essequibo and Curuni.
Genetic reserach has revealed that populations from the upper and middle/lower rio Negro in Brazil represent separate evolutionary units and do not hybridise at the one locality where they occur sympatrically (the Igarapé Jacuná, a tributary of the middle Negro).
Seriouslyfish 對該種的報告原文
