Trichomycterus largoperculatus, sp. nov. from the Rio Paraíba do Sul, southeastern Brazil

For the discussion of catfish systematics. Post here to draw our attention to new publications or to discuss existing works.
Post Reply
User avatar
bekateen
Posts: 8955
Joined: 09 Sep 2014, 17:50
I've donated: $40.00!
My articles: 4
My images: 130
My cats species list: 142 (i:102, k:39)
My aquaria list: 36 (i:13)
My BLogs: 44 (i:149, p:2653)
My Wishlist: 35
Spotted: 177
Location 1: USA, California, Stockton
Location 2: USA, California, Stockton
Contact:

Trichomycterus largoperculatus, sp. nov. from the Rio Paraíba do Sul, southeastern Brazil

Post by bekateen »



Costa, W. J., & Katz, A. M. (2022). A new catfish of the genus Trichomycterus from the Rio Paraíba do Sul Basin, south-eastern Brazil, a supposedly migrating species (Siluriformes, Trichomycteridae). Zoosystematics and Evolution, 98, 13.
A new species of the catfish genus Trichomycterus is described from the Rio Paraíba do Sul, south-eastern Brazil. This species exhibits some morphological character states that are unique amongst congeners, including a robust opercle and a long interopercle with numerous odontodes (50–60 opercular and 90–100 interopercular), a black bar on the basal portion of the caudal fin and a dark brown flank with a well delimited dorsal yellow stripe. It also exhibits some morphological traits that are uncommon amongst congeners, such as the presence of nine pectoral-fin rays. The presence of a shallow hyomandibular outgrowth and a ventrally expanded pre-opercular ventral flap suggests that this species is closely related to T. melanopygius, T. pradensis and T. tete. The new species also differs from T. melanopygius, T. pradensis and T. tete by having an emarginate caudal fin and a single median supra-orbital pore S6. Anecdotal evidence suggests that T. largoperculatus and T. pradensis have migratory habits, a condition not previously reported for eastern South American trichomycterines.
Image
Find me on YouTube and Facebook: http://youtube.com/user/Bekateen1; https://www.facebook.com/Bekateen
Buying caves from https://plecocaves.com? Plecocaves sponsor Bekateen's Fishroom. Use coupon code "bekateen" (no quotes) for 15% off your order.
User avatar
bekateen
Posts: 8955
Joined: 09 Sep 2014, 17:50
I've donated: $40.00!
My articles: 4
My images: 130
My cats species list: 142 (i:102, k:39)
My aquaria list: 36 (i:13)
My BLogs: 44 (i:149, p:2653)
My Wishlist: 35
Spotted: 177
Location 1: USA, California, Stockton
Location 2: USA, California, Stockton
Contact:

Re: Trichomycterus largoperculatus, sp. nov. from the Rio Paraíba do Sul, southeastern Brazil

Post by bekateen »

Image
Find me on YouTube and Facebook: http://youtube.com/user/Bekateen1; https://www.facebook.com/Bekateen
Buying caves from https://plecocaves.com? Plecocaves sponsor Bekateen's Fishroom. Use coupon code "bekateen" (no quotes) for 15% off your order.
Post Reply

Return to “Taxonomy & Science News”