小紅鉛筆 (Nannostomus marginatus from upper rio negro)

內格羅型小紅鉛筆, 體長大概只有3cm, 身體呈金黃色, 其上長有三條橫向黑帶, 上及中線黑帶較粗, 由吻部伸展至尾鰭為止, 腹部下線黑帶較幼; 體側, 尾鰭, 背鰭, 臂鰭, 腹鰭, 俱長有紅色的色斑, 而體側那紅色橫帶色斑與中間黑帶重疊, 由腮後一直展至尾鰭位置, 該位置呈紅兩點狀, 有別於奎內亞型的小紅鉛筆

小紅鉛筆產地分佈廣泛, 以下是節錄自seriouslyfish 對該種的產地報告:-

Type locality is ‘Maduni Creek, Guyana’, and this species is widely-distributed throughout Guyana and Suriname, plus the middle-to-lower Amazon basin east of the Andes mountains in Peru, Colombia, and Brazil.
Records thus exist from various major river systems including the Rupununi, Takutu, Essequibo and Demerara in Guyana, the Nickerie and  Courantyne/Corantijn in Suriname, Inírida and Caquetá in Colombia, the Ucayali, Javari, Ampiyacu, and Putumayo in Peru, the Napo in Ecuador and Peru, Juruá in Brazil, and throughout most major left-bank tributaries of the Amazon in Brazil, including the Japurá, Negro, Branco, and Trombetas.
Records from the upper Río Orinoco in Venezuela also exist but may require confirmation.

Seriouslyfish 對該種的報告原文