Amazon Ariidae

For the discussion of catfish systematics. Post here to draw our attention to new publications or to discuss existing works.
Post Reply
User avatar
Silurus
Posts: 12410
Joined: 31 Dec 2002, 11:35
I've donated: $12.00!
My articles: 55
My images: 889
My catfish: 1
My cats species list: 90 (i:0, k:0)
Spotted: 422
Location 1: Singapore
Location 2: Moderator Emeritus

Amazon Ariidae

Post by Silurus »

Lutz Í, T Martins, P Santana, C Ferreira, J Miranda, S Matos, V Muhala, I Sampaio, M Vallinoto& G Evangelista-Gomes, 2024. Marine catfishes (Ariidae—Siluriformes) from the coastal Amazon: mitochondrial DNA barcode for a recent diversification group? PeerJ 12:e17581.

Abstract

Background
Ariidae species play a significant role as fishing resources in the Amazon region. However, the family’s systematic classification is notably challenging, particularly regarding species delimitation within certain genera. This difficulty arises from pronounced morphological similarities among species, posing obstacles to accurate species recognition.

Methods
Following morphological identification, mitochondrial markers (COI and Cytb) were employed to assess the diversity of Ariidae species in the Amazon.

Results
Our sampling efforts yielded 12 species, representing 92% of the coastal Amazon region’s diversity. Morphological identification findings were largely corroborated by molecular data, particularly for species within the Sciades and Bagre genera. Nonetheless, despite morphological support, Cathorops agassizii and Cathorops spixii displayed minimal genetic divergence (0.010). Similarly, Notarius quadriscutis and Notarius phrygiatus formed a single clade with no genetic divergence, indicating mitochondrial introgression. For the majority of taxa examined, both COI and Cytb demonstrated efficacy as DNA barcodes, with Cytb exhibiting greater polymorphism and resolution. Consequently, the molecular tools utilized proved highly effective for species discrimination and identification.
Image
Post Reply

Return to “Taxonomy & Science News”