In:
ZooKeys, Pensoft Publishers, Vol. 1164 ( 2023-05-26), p. 1-21
Abstract:
Phenacogaster is the most species-rich genus of the subfamily Characinae with 23 valid species broadly distributed in riverine systems of South America. Despite the taxonomic diversity of the genus, little has been advanced about its molecular diversity. A recent molecular phylogeny indicated the presence of undescribed species within Phenacogaster that is formally described here. We sampled 73 specimens of Phenacogaster and sequenced the mitochondrial cytochrome c oxidase subunit I (COI) gene in order to undertake species delimitation analyses and evaluate their intra- and interspecific genetic diversity. The results show the presence of 14 species, 13 of which are valid and one undescribed. The new species is known from the tributaries of the Xingu basin, the Rio das Mortes of the Araguaia basin, and the Rio Teles Pires of the Tapajós basin. It is distinguished by the incomplete lateral line, position of the humeral blotch near the pseudotympanum, and shape of the caudal-peduncle blotch. Meristic data and genetic differentiation relative to other Phenacogaster species represent strong evidence for the recognition of the new species and highlight the occurrence of an additional lineage of P. franciscoensis .
Type of Medium:
Online Resource
ISSN:
1313-2970
,
1313-2989
DOI:
10.3897/zookeys.1164.102436
DOI:
10.3897/zookeys.1164.102436.figure1
DOI:
10.3897/zookeys.1164.102436.figure2
DOI:
10.3897/zookeys.1164.102436.figure3
DOI:
10.3897/zookeys.1164.102436.figure4
DOI:
10.3897/zookeys.1164.102436.figure5
DOI:
10.3897/zookeys.1164.102436.figure6
DOI:
10.3897/zookeys.1164.102436.suppl1
DOI:
10.3897/zookeys.1164.102436.suppl2
DOI:
10.3897/zookeys.1164.102436.suppl3
DOI:
10.3897/zookeys.1164.102436.suppl4
Language:
Unknown
Publisher:
Pensoft Publishers
Publication Date:
2023
detail.hit.zdb_id:
2445640-8
SSG:
12
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