2019
DOI: 10.1371/journal.pone.0226130
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On a remarkable sexual dimorphic trait in the Characiformes related to the olfactory organ and description of a new miniature species of Tyttobrycon Géry (Characiformes: Characidae)

Abstract: Among the order Characiformes, secondary sexual dimorphism is commonly associated to the occurrence of bony hooks on fins, shape and length of the dorsal and anal fins, and sexual dichromatism. The analysis of a new miniature Characidae species of the genus Tyttobrycon, described herein, yielded to the discovery of a sexually dimorphic trait related to nostril aperture and number of olfactory lamellae. In this type of dimorphism, mature males present larger nostril aperture and higher number of olfactory lamel… Show more

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Cited by 17 publications
(22 citation statements)
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References 51 publications
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“…This arrangement seemed essential to achieve the unidirectional flow of water through the olfactory cavity, as demonstrated in Anguilla anguilla , where the absence of the skin flap causes an abnormal and irregular movement of water flow (Teichmann, 1954). Unlike Abrahão et al (2019), the opening of the nose and the number of olfactory lamellae did not show any sexual dimorphism. Also, A. anisitsi belongs to the group of isosmates (Døving et al, 1977) since the presence of accessory olfactory sacs was not observed and NSCs were identified.…”
Section: Discussioncontrasting
confidence: 83%
See 1 more Smart Citation
“…This arrangement seemed essential to achieve the unidirectional flow of water through the olfactory cavity, as demonstrated in Anguilla anguilla , where the absence of the skin flap causes an abnormal and irregular movement of water flow (Teichmann, 1954). Unlike Abrahão et al (2019), the opening of the nose and the number of olfactory lamellae did not show any sexual dimorphism. Also, A. anisitsi belongs to the group of isosmates (Døving et al, 1977) since the presence of accessory olfactory sacs was not observed and NSCs were identified.…”
Section: Discussioncontrasting
confidence: 83%
“…Given that reports on the biology of A. anisitsi are scarce (Corrêa, Hahn, & Delariva, 2009; Gonçalves, AzevedoII, MalabarbaI, & Fialho, 2005; Obando‐Bulla et al, 2013) and as there is only partial information on the olfactory system of the Characidae family (Abrahão, Pastana, & Marinho, 2019; Hansen & Zeiske, 1998; Schulte & Riehl, 1978), we aimed to fully describe the structural organization of the olfactory epithelium of bloodfin tetra using histology, immunohistochemistry and scanning electron microscopy. We focused on the morphology of the olfactory cells and the arrangement of the sensory and non‐sensory epithelium.…”
Section: Introductionmentioning
confidence: 99%
“…The olfactory bulb is sessile in G . sveni , as found in African cichlids (Huber et al ., 1997; Kotrschal et al ., 1998; van Staaden et al ., 1995), in Callichthyidae (Espíndola et al ., 2018; Pupo & Britto, 2018) and in a Characidae species (Abrahão et al ., 2019). Conversely, this feature may be stalked, as found in some Ostariophysi groups.…”
Section: Discussionmentioning
confidence: 99%
“…Regarding this, Kotrschal et al (1998) found the highest variability, but interspecific, in the forebrain (i.e., the portion of the encephalon composed of the telencephalon and the diencephalon) among African cichlids. The olfactory bulb is sessile in G. sveni, as found in African cichlids (Huber et al, 1997;Kotrschal et al, 1998;van Staaden et al, 1995), in Callichthyidae (Espíndola et al, 2018; and in a Characidae species (Abrahão et al, 2019). Conversely, this feature may be stalked, as found in some…”
Section: Width Of the Brainmentioning
confidence: 93%
“…The genetic distance between O. pacaasnovos and O. pequira ranged from 6.08% to 6.92%, while the intraspecific genetic distance in O. pequira ranged from 0.00% to 4.05% and in O. pacaasnovos samples is 0.00% (Table 2) (Bertelsen, 1951) or male-male detection related to cohort competition (Abrahão et al, 2019).…”
Section: Ecological Notesmentioning
confidence: 99%