Markiana nigripinnis (Perugia, 1891) as a putative member of the subfamily Stevardiinae (Characiformes: Characidae): spermatic evidence
The genus Markiana was until recently recognized as incertae sedis in the family Characidae, even though alternative placements for this genus have been advanced since its original description. More recently, it was hypothesized that Markiana nigripinnis is part of a clade informally named the Astya...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
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| Series: | Neotropical Ichthyology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200015&lng=en&tlng=en |
| _version_ | 1817994392872419328 |
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| author | Clarianna Martins Baicere-Silva Ricardo C. Benine Irani Quagio-Grassiotto |
| author_facet | Clarianna Martins Baicere-Silva Ricardo C. Benine Irani Quagio-Grassiotto |
| author_sort | Clarianna Martins Baicere-Silva |
| collection | DOAJ |
| description | The genus Markiana was until recently recognized as incertae sedis in the family Characidae, even though alternative placements for this genus have been advanced since its original description. More recently, it was hypothesized that Markiana nigripinnis is part of a clade informally named the Astyanax clade, indicating the putative close relationship of Markiana with the genus Astyanax. Examination of sperm ultrastructure of representatives of Astyanax and M. nigripinnis shows no evidence for this hypothesized close relationship. Rather, the spermatozoa of M. nigripinnis share characters found in spermatozoa of the non-inseminating members of the subfamily Stevardiinae, such as an angle of nuclear rotation equal to 85º resulting in a lateral position of the double nuclear fossa and flagellum. As with the non-inseminating Stevardiinae, sperm nuclei are also slightly elongate toward the flagellum, the proximal centriole is partially inside the nuclear fossa and anterior and oblique to the distal centriole, and the midpiece is short and strongly asymmetric. Additionally, M. nigripinnis shares with the other members of the Stevardiinae the presence of only four teeth in the inner row of the premaxillary and a short triangular ectopterygoid, which is never more than twice the length of the palatine. |
| first_indexed | 2024-04-14T01:52:15Z |
| format | Article |
| id | doaj.art-11e77c7edc094cf1a829c2b212515511 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-04-14T01:52:15Z |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-11e77c7edc094cf1a829c2b2125155112022-12-22T02:19:18ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02249237137610.1590/S1679-62252011005000020S1679-62252011000200015Markiana nigripinnis (Perugia, 1891) as a putative member of the subfamily Stevardiinae (Characiformes: Characidae): spermatic evidenceClarianna Martins Baicere-Silva0Ricardo C. Benine1Irani Quagio-Grassiotto2Universidade Estadual PaulistaUniversidade Estadual PaulistaUniversidade Estadual PaulistaThe genus Markiana was until recently recognized as incertae sedis in the family Characidae, even though alternative placements for this genus have been advanced since its original description. More recently, it was hypothesized that Markiana nigripinnis is part of a clade informally named the Astyanax clade, indicating the putative close relationship of Markiana with the genus Astyanax. Examination of sperm ultrastructure of representatives of Astyanax and M. nigripinnis shows no evidence for this hypothesized close relationship. Rather, the spermatozoa of M. nigripinnis share characters found in spermatozoa of the non-inseminating members of the subfamily Stevardiinae, such as an angle of nuclear rotation equal to 85º resulting in a lateral position of the double nuclear fossa and flagellum. As with the non-inseminating Stevardiinae, sperm nuclei are also slightly elongate toward the flagellum, the proximal centriole is partially inside the nuclear fossa and anterior and oblique to the distal centriole, and the midpiece is short and strongly asymmetric. Additionally, M. nigripinnis shares with the other members of the Stevardiinae the presence of only four teeth in the inner row of the premaxillary and a short triangular ectopterygoid, which is never more than twice the length of the palatine.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200015&lng=en&tlng=enAstyanax cladeClade ASpermiogenesisSpermatozoa ultrastructure |
| spellingShingle | Clarianna Martins Baicere-Silva Ricardo C. Benine Irani Quagio-Grassiotto Markiana nigripinnis (Perugia, 1891) as a putative member of the subfamily Stevardiinae (Characiformes: Characidae): spermatic evidence Neotropical Ichthyology Astyanax clade Clade A Spermiogenesis Spermatozoa ultrastructure |
| title | Markiana nigripinnis (Perugia, 1891) as a putative member of the subfamily Stevardiinae (Characiformes: Characidae): spermatic evidence |
| title_full | Markiana nigripinnis (Perugia, 1891) as a putative member of the subfamily Stevardiinae (Characiformes: Characidae): spermatic evidence |
| title_fullStr | Markiana nigripinnis (Perugia, 1891) as a putative member of the subfamily Stevardiinae (Characiformes: Characidae): spermatic evidence |
| title_full_unstemmed | Markiana nigripinnis (Perugia, 1891) as a putative member of the subfamily Stevardiinae (Characiformes: Characidae): spermatic evidence |
| title_short | Markiana nigripinnis (Perugia, 1891) as a putative member of the subfamily Stevardiinae (Characiformes: Characidae): spermatic evidence |
| title_sort | markiana nigripinnis perugia 1891 as a putative member of the subfamily stevardiinae characiformes characidae spermatic evidence |
| topic | Astyanax clade Clade A Spermiogenesis Spermatozoa ultrastructure |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200015&lng=en&tlng=en |
| work_keys_str_mv | AT clariannamartinsbaiceresilva markiananigripinnisperugia1891asaputativememberofthesubfamilystevardiinaecharaciformescharacidaespermaticevidence AT ricardocbenine markiananigripinnisperugia1891asaputativememberofthesubfamilystevardiinaecharaciformescharacidaespermaticevidence AT iraniquagiograssiotto markiananigripinnisperugia1891asaputativememberofthesubfamilystevardiinaecharaciformescharacidaespermaticevidence |