STUDIES ON PYCNODONT FISHES (I): EVALUATION OF THEIR PHYLOGENETIC POSITION AMONG ACTINOPTERYGIANS
One of the main pending, unsolved problems concerning the study of the pycnodont fishes is their phylogenetic relationships with other major actinopterygian groups. The Pycnodontiformes have often been proposed as the sister group of the Telostei or the Teleosteomorpha. The first extensive cladistic...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Milano University Press
2015-11-01
|
| Series: | Rivista Italiana di Paleontologia e Stratigrafia |
| Subjects: | |
| Online Access: | https://riviste.unimi.it/index.php/RIPS/article/view/6521 |
| _version_ | 1797709814612099072 |
|---|---|
| author | FRANCISCO JOSÉ POYATO-ARIZA |
| author_facet | FRANCISCO JOSÉ POYATO-ARIZA |
| author_sort | FRANCISCO JOSÉ POYATO-ARIZA |
| collection | DOAJ |
| description | One of the main pending, unsolved problems concerning the study of the pycnodont fishes is their phylogenetic relationships with other major actinopterygian groups. The Pycnodontiformes have often been proposed as the sister group of the Telostei or the Teleosteomorpha. The first extensive cladistic analysis on pycnodont relationships is hereby attempted by coding Pycnodontiformes into a previously existing data matrix with major neopterygian groups: Lepisosteiformes, Semionotiformes, Macrosemiiformes, Halecomorphi, and Teleostei. This analysis has resulted on the Pycnodontiformes having an unexpected position as the most basal Neopterygii among the groups included. Therefore, pycnodonts are not the sister-group of teleosteans, and they are not holosteans either. The phylogenetic relationships and the definition of the Holostei and the Gynglimodi are not affected by the inclusion of the Pycnodontiformes, but the basal position of the latter among Neopterygii may affect the definition of this traditional major actinopterygian group. A collateral consequence of these results is that the Halecostomi can be re-defined as the clade formed by [Holostei + Teleostei]. The phylogenetic relationships of pycnodonts should, consequently, be solved among basal neopterygian groups, mostly from the Triassic, as well as relevant non-neopterygian actinopterygians in order to confirm the neopterygian affinities of the Pycnodontiformes and to verify the definition and diagnosis of the Neopterygii and the Halecostomi. |
| first_indexed | 2024-03-12T06:43:19Z |
| format | Article |
| id | doaj.art-7b686065f49d482abfcd58507c2495d8 |
| institution | Directory Open Access Journal |
| issn | 0035-6883 2039-4942 |
| language | English |
| last_indexed | 2024-03-12T06:43:19Z |
| publishDate | 2015-11-01 |
| publisher | Milano University Press |
| record_format | Article |
| series | Rivista Italiana di Paleontologia e Stratigrafia |
| spelling | doaj.art-7b686065f49d482abfcd58507c2495d82023-09-03T00:53:14ZengMilano University PressRivista Italiana di Paleontologia e Stratigrafia0035-68832039-49422015-11-01121310.13130/2039-4942/65215806STUDIES ON PYCNODONT FISHES (I): EVALUATION OF THEIR PHYLOGENETIC POSITION AMONG ACTINOPTERYGIANSFRANCISCO JOSÉ POYATO-ARIZAOne of the main pending, unsolved problems concerning the study of the pycnodont fishes is their phylogenetic relationships with other major actinopterygian groups. The Pycnodontiformes have often been proposed as the sister group of the Telostei or the Teleosteomorpha. The first extensive cladistic analysis on pycnodont relationships is hereby attempted by coding Pycnodontiformes into a previously existing data matrix with major neopterygian groups: Lepisosteiformes, Semionotiformes, Macrosemiiformes, Halecomorphi, and Teleostei. This analysis has resulted on the Pycnodontiformes having an unexpected position as the most basal Neopterygii among the groups included. Therefore, pycnodonts are not the sister-group of teleosteans, and they are not holosteans either. The phylogenetic relationships and the definition of the Holostei and the Gynglimodi are not affected by the inclusion of the Pycnodontiformes, but the basal position of the latter among Neopterygii may affect the definition of this traditional major actinopterygian group. A collateral consequence of these results is that the Halecostomi can be re-defined as the clade formed by [Holostei + Teleostei]. The phylogenetic relationships of pycnodonts should, consequently, be solved among basal neopterygian groups, mostly from the Triassic, as well as relevant non-neopterygian actinopterygians in order to confirm the neopterygian affinities of the Pycnodontiformes and to verify the definition and diagnosis of the Neopterygii and the Halecostomi.https://riviste.unimi.it/index.php/RIPS/article/view/6521ActinopterygiiHalecostomiHolosteiNeopterygiiPhylogenetic RelationshipsPycnodontiformesTeleostei |
| spellingShingle | FRANCISCO JOSÉ POYATO-ARIZA STUDIES ON PYCNODONT FISHES (I): EVALUATION OF THEIR PHYLOGENETIC POSITION AMONG ACTINOPTERYGIANS Rivista Italiana di Paleontologia e Stratigrafia Actinopterygii Halecostomi Holostei Neopterygii Phylogenetic Relationships Pycnodontiformes Teleostei |
| title | STUDIES ON PYCNODONT FISHES (I): EVALUATION OF THEIR PHYLOGENETIC POSITION AMONG ACTINOPTERYGIANS |
| title_full | STUDIES ON PYCNODONT FISHES (I): EVALUATION OF THEIR PHYLOGENETIC POSITION AMONG ACTINOPTERYGIANS |
| title_fullStr | STUDIES ON PYCNODONT FISHES (I): EVALUATION OF THEIR PHYLOGENETIC POSITION AMONG ACTINOPTERYGIANS |
| title_full_unstemmed | STUDIES ON PYCNODONT FISHES (I): EVALUATION OF THEIR PHYLOGENETIC POSITION AMONG ACTINOPTERYGIANS |
| title_short | STUDIES ON PYCNODONT FISHES (I): EVALUATION OF THEIR PHYLOGENETIC POSITION AMONG ACTINOPTERYGIANS |
| title_sort | studies on pycnodont fishes i evaluation of their phylogenetic position among actinopterygians |
| topic | Actinopterygii Halecostomi Holostei Neopterygii Phylogenetic Relationships Pycnodontiformes Teleostei |
| url | https://riviste.unimi.it/index.php/RIPS/article/view/6521 |
| work_keys_str_mv | AT franciscojosepoyatoariza studiesonpycnodontfishesievaluationoftheirphylogeneticpositionamongactinopterygians |