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Neoplecostomus doceensis: a new loricariid species (Teleostei, Siluriformes) from the rio Doce basin and comments about its putative origin.

Roxo FF, Silva GS, Zawadzki CH, Oliveira C - Zookeys (2014)

Bottom Line: A new species of Neoplecostomus is described from the rio Doce basin representing the first species of this genus in the basin.The new species is distinguished from its congeners by having enlarged, fleshy folds between dentaries, two or three series of developed papillae anterior to premaxillary teeth and a adipose-fin membrane present, and by lacking enlarged odontodes along snout lateral margins in mature males, a well-developed dorsal-fin spinelet wider than dorsal-fin spine base, lower number of lateral-line figs and developed membrane on the dorsal portion of the first, second and third pelvic-fin branched rays.Additionally, we present a brief discussion of biogeographic scenarios that may explain the distribution of the new species in the rio Doce basin.

View Article: PubMed Central - HTML - PubMed

Affiliation: Universidade Estadual Paulista, UNESP, Departamento de Morfologia, Laboratório de Biologia e Genética de Peixes, 18618-000, Botucatu,São Paulo State, Brazil.

ABSTRACT
A new species of Neoplecostomus is described from the rio Doce basin representing the first species of this genus in the basin. The new species is distinguished from its congeners by having enlarged, fleshy folds between dentaries, two or three series of developed papillae anterior to premaxillary teeth and a adipose-fin membrane present, and by lacking enlarged odontodes along snout lateral margins in mature males, a well-developed dorsal-fin spinelet wider than dorsal-fin spine base, lower number of lateral-line figs and developed membrane on the dorsal portion of the first, second and third pelvic-fin branched rays. Additionally, we present a brief discussion of biogeographic scenarios that may explain the distribution of the new species in the rio Doce basin. We suggested that the ancestral lineage of the new species reached the rio Doce from the upper portions of rio Paraná drainages about 3.5 Mya (95% HPD: 1.6-5.5) indicating a colonization route of the N. doceensis ancestral lineage from the south end of Serra do Espinhaço, probably as a result of headwater capture processes between the upper rio Paraná and rio Doce basins.

No MeSH data available.


aNeoplecostomus doceensis, MZUSP 115486, 101.1 mm SL, male, holotype, arrow showing the developed papillae between dentaries bNeoplecostomus botucatu, MZUSP 110364, 98.6 mm SL, male, paratype, lacking the papillae between dentaries cNeoplecostomus doceensis, MZUSP 115486, 101.1 mm SL (male), holotype, arrow showing the developed papillae series anterior to premaxillary teeth dNeoplecostomus selenae, MZUSP 51889, 101.7 mm SL, male, paratype, lacking the papillae series anterior to premaxillary teeth.
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Figure 2: aNeoplecostomus doceensis, MZUSP 115486, 101.1 mm SL, male, holotype, arrow showing the developed papillae between dentaries bNeoplecostomus botucatu, MZUSP 110364, 98.6 mm SL, male, paratype, lacking the papillae between dentaries cNeoplecostomus doceensis, MZUSP 115486, 101.1 mm SL (male), holotype, arrow showing the developed papillae series anterior to premaxillary teeth dNeoplecostomus selenae, MZUSP 51889, 101.7 mm SL, male, paratype, lacking the papillae series anterior to premaxillary teeth.

Mentions: Neoplecostomus doceensis is distinguished from all other congeners by having enlarged, fleshy folds between dentaries in all specimens, more evident in mature males, Fig. 2a (vs. absence of the enlarged fleshy folds, Fig. 2b). The new species can also be distinguished from all congeners by the presence of two or three series of well-developed papillae anterior to premaxillary teeth, Fig. 2c (vs. papillae poorly developed or absent Fig. 2d). Additionally, the new species can be distinguished from Neoplecostomus botucatu and Neoplecostomus paranensis by the presence of a fully-developed adipose fin (vs. lacking or reduced adipose fin); from Neoplecostomus selenae by moderately-sized odontodes along lateral margins of snout and snout without swollen skin in mature males (vs. presence of large-sized odontodes surrounded by swollen skin along lateral margins of snout in mature males); from Neoplecostomus franciscoensis and Neoplecostomus ribeirensis by having a well-developed dorsal-fin spinelet, wider than dorsal-fin spine base (vs. absent or narrower than dorsal-fin spine base); from Neoplecostomus microps and Neoplecostomus variipictus by a higher number of dentary teeth 12–35 (vs. 5–12 and 7 respectively); from Neoplecostomus granosus by having a lower number of lateral-line figs, 25–29 (vs. 34–43); from Neoplecostomus langeanii by the presence of a developed membrane on the dorsal portion of the first, second and third pelvic-fin branched rays (vs. lacking).


Neoplecostomus doceensis: a new loricariid species (Teleostei, Siluriformes) from the rio Doce basin and comments about its putative origin.

Roxo FF, Silva GS, Zawadzki CH, Oliveira C - Zookeys (2014)

aNeoplecostomus doceensis, MZUSP 115486, 101.1 mm SL, male, holotype, arrow showing the developed papillae between dentaries bNeoplecostomus botucatu, MZUSP 110364, 98.6 mm SL, male, paratype, lacking the papillae between dentaries cNeoplecostomus doceensis, MZUSP 115486, 101.1 mm SL (male), holotype, arrow showing the developed papillae series anterior to premaxillary teeth dNeoplecostomus selenae, MZUSP 51889, 101.7 mm SL, male, paratype, lacking the papillae series anterior to premaxillary teeth.
© Copyright Policy - creative-commons-attribution
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4195942&req=5

Figure 2: aNeoplecostomus doceensis, MZUSP 115486, 101.1 mm SL, male, holotype, arrow showing the developed papillae between dentaries bNeoplecostomus botucatu, MZUSP 110364, 98.6 mm SL, male, paratype, lacking the papillae between dentaries cNeoplecostomus doceensis, MZUSP 115486, 101.1 mm SL (male), holotype, arrow showing the developed papillae series anterior to premaxillary teeth dNeoplecostomus selenae, MZUSP 51889, 101.7 mm SL, male, paratype, lacking the papillae series anterior to premaxillary teeth.
Mentions: Neoplecostomus doceensis is distinguished from all other congeners by having enlarged, fleshy folds between dentaries in all specimens, more evident in mature males, Fig. 2a (vs. absence of the enlarged fleshy folds, Fig. 2b). The new species can also be distinguished from all congeners by the presence of two or three series of well-developed papillae anterior to premaxillary teeth, Fig. 2c (vs. papillae poorly developed or absent Fig. 2d). Additionally, the new species can be distinguished from Neoplecostomus botucatu and Neoplecostomus paranensis by the presence of a fully-developed adipose fin (vs. lacking or reduced adipose fin); from Neoplecostomus selenae by moderately-sized odontodes along lateral margins of snout and snout without swollen skin in mature males (vs. presence of large-sized odontodes surrounded by swollen skin along lateral margins of snout in mature males); from Neoplecostomus franciscoensis and Neoplecostomus ribeirensis by having a well-developed dorsal-fin spinelet, wider than dorsal-fin spine base (vs. absent or narrower than dorsal-fin spine base); from Neoplecostomus microps and Neoplecostomus variipictus by a higher number of dentary teeth 12–35 (vs. 5–12 and 7 respectively); from Neoplecostomus granosus by having a lower number of lateral-line figs, 25–29 (vs. 34–43); from Neoplecostomus langeanii by the presence of a developed membrane on the dorsal portion of the first, second and third pelvic-fin branched rays (vs. lacking).

Bottom Line: A new species of Neoplecostomus is described from the rio Doce basin representing the first species of this genus in the basin.The new species is distinguished from its congeners by having enlarged, fleshy folds between dentaries, two or three series of developed papillae anterior to premaxillary teeth and a adipose-fin membrane present, and by lacking enlarged odontodes along snout lateral margins in mature males, a well-developed dorsal-fin spinelet wider than dorsal-fin spine base, lower number of lateral-line figs and developed membrane on the dorsal portion of the first, second and third pelvic-fin branched rays.Additionally, we present a brief discussion of biogeographic scenarios that may explain the distribution of the new species in the rio Doce basin.

View Article: PubMed Central - HTML - PubMed

Affiliation: Universidade Estadual Paulista, UNESP, Departamento de Morfologia, Laboratório de Biologia e Genética de Peixes, 18618-000, Botucatu,São Paulo State, Brazil.

ABSTRACT
A new species of Neoplecostomus is described from the rio Doce basin representing the first species of this genus in the basin. The new species is distinguished from its congeners by having enlarged, fleshy folds between dentaries, two or three series of developed papillae anterior to premaxillary teeth and a adipose-fin membrane present, and by lacking enlarged odontodes along snout lateral margins in mature males, a well-developed dorsal-fin spinelet wider than dorsal-fin spine base, lower number of lateral-line figs and developed membrane on the dorsal portion of the first, second and third pelvic-fin branched rays. Additionally, we present a brief discussion of biogeographic scenarios that may explain the distribution of the new species in the rio Doce basin. We suggested that the ancestral lineage of the new species reached the rio Doce from the upper portions of rio Paraná drainages about 3.5 Mya (95% HPD: 1.6-5.5) indicating a colonization route of the N. doceensis ancestral lineage from the south end of Serra do Espinhaço, probably as a result of headwater capture processes between the upper rio Paraná and rio Doce basins.

No MeSH data available.