Auchenipterichthys Thoracatus
Auchenipterichthys thoracatus is a species of driftwood catfish endemic to Peru where it is found in the Amazon River basin. It grows to a length of 11.0 cm.Auchenipterichthys was first described by Pieter Bleeker in 1862, who designated A. thoracatus (originally described by Kner in 1857 as Auchenipterus thoracatus) as the type species.There are no derived states that is unique to this genus; however, there is no evidence that has been advanced to indicate that this genus is not monophyletic.Species of Auchenipterichthys are sexually dimorphic. Breeding males of A. coracoideus have an elongated dorsal fin spine. In A. longimanus and A. thoracatus, serrae on the end of the dorsal fin spine are proportionally longer in breeding males than in juveniles and females. Also, females have an enlarged urogenital opening. Males have their urogenital opening located at the end of a tube bound by integument to the anterior margin of the anal fin.The males use their modified anal fin as a means of internal insemination; the female can later lay the eggs in isolation.
No comments:
Post a Comment