A new synapomorphy in the pelvic girdle reinforces a close relationship of <i>Zanobatus</i> and Myliobatiformes (Chondrichthyes: Batoidea)

Silva, João Paulo Capretz Batista Da; Loboda, Thiago Silva; Rosa, Ricardo S.

doi:10.1111/joa.13354

Cited by 5 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Musculature associated with the paired girdles and fins was removed to expose the skeleton in the available specimens. Terminology for the appendicular skeletal structures primarily follows Silva (2014), Silva and Carvalho (2015), Silva et al (2018), Silva et al (2020), Silva and Vaz (2021) and Silva and Vaz (2023). Cladograms and maximum parsimony character optimizations were made with the software Mesquite v.3.8 (Maddison & Maddison, 2023).…”

Section: Methodsmentioning

confidence: 99%

The appendicular skeleton of the enigmatic shark Leptocharias smithii in comparison with other sharks of the order Carcharhiniformes (Elasmobranchii: Leptochariidae)

Capretz Batista Da Silva,

Medeiros,

Araújo

et al. 2024

Journal of Morphology

View full text Add to dashboard Cite

Leptocharias smithii has been poorly explored in anatomical terms. This species bears a mosaic of morphological characters and is considered to represent an intermediate condition between other carcharhiniform clades. In the present paper, the anatomy of the appendicular skeleton of the species is thoroughly investigated and compared with other representatives of the order Carcharhiniformes. Leptocharias bears exclusive characteristics, such as the visible separation of the pro‐ and mesopterygia but it also has an aplesodic pectoral fin, a condition shared with carcharhiniforms placed at the base of the phylogenetic tree and at the same time a chevron‐shaped coracoid bar, a condition characteristic of charcharhiniforms placed at the apex of the phylogenetic tree. Additionally, in an attempt to understand the evolution of its appendicular skeleton and of other carcharhiniforms, 20 characters of the paired fins and girdles are explored and discussed in light of two recent phylogenetic hypotheses. Most of these characters were not previously explored and support not only the monophyly of Carcharhiniformes, such as the mesopterygium overlapping the metapterygium in ventral view, but also the monophyly of the less inclusive clade Hemigaleidae + (Galeocerdonidae + (Carcharhinidae+Sphyrnidae)), such as the morphology and arrangement of the distal radials, which are pointed and spaced.

show abstract

Section: Methodsmentioning

confidence: 99%

The appendicular skeleton of the enigmatic shark Leptocharias smithii in comparison with other sharks of the order Carcharhiniformes (Elasmobranchii: Leptochariidae)

Capretz Batista Da Silva,

Medeiros,

Araújo

et al. 2024

Journal of Morphology

View full text Add to dashboard Cite

show abstract

“…Furthermore, data on the appendicular skeleton of additional lamniform species were obtained from literature, such as the studies of Pavesi (1878), Crawford (2014), and Stone and Shimada (2019). Terminology for the appendicular skeletal structures primarily follows Silva (2014), Silva and Carvalho (2015), Silva et al (2018), Silva et al (2020), Silva and Vaz (2021) and Silva and Vaz (2023). Illustrations include line drawings and CT images as well as photographs taken with a high‐resolution digital camera.…”

Section: Methodsmentioning

confidence: 99%

“…About half of them were cranial characters, and they noted that there are many other potential phylogenetically informative anatomical characters that have not yet been explored in detail. For example, data from the appendicular skeleton have been proved phylogenetically relevant for several elasmobranch groups (Silva & Datovo, 2020; Silva et al, 2020; Silva & Carvalho, 2015; Silva et al, 2015, 2018), but an in‐depth analysis of this skeletal system in lamniforms has never been conducted previously. Therefore, by building on Stone and Shimada's (2019) study, this present study investigates the phylogenetic signal and relevance of the paired girdles and fins in lamniforms.…”

Section: Introductionmentioning

confidence: 99%

The importance of the appendicular skeleton for the phylogenetic reconstruction of lamniform sharks (Chondrichthyes: Elasmobranchii)

Silva

Shimada

Datovo

2023

Journal of Morphology

Self Cite

View full text Add to dashboard Cite

Lamniform sharks are one of the more conspicuous groups of elasmobranchs, including several emblematic taxa as the white shark. Although their monophyly is well supported, the interrelationships of taxa within Lamniformes remains controversial because of the conflict among various previous molecular‐based and morphology‐based phylogenetic hypotheses. In this study, we use 31 characters related to the appendicular skeleton of lamniforms and demonstrate their ability to resolve the systematic interrelationships within this shark order. In particular, the new additional skeletal characters resolve all polytomies that were present in previous morphology‐based phylogenetic analyses of lamniforms. Our study demonstrates the strength of incorporating new morphological data for phylogenetic reconstructions.

show abstract

Morphology and phylogenetic significance of the pelvic articular region in elasmobranchs (Chondrichthyes)

Silva

Vaz

2023

Cladistics

View full text Add to dashboard Cite

The morphology of paired fins is commonly overlooked in morphological studies, particularly the pelvic girdle and fins. Consequently, previous phylogenetic studies incorporating morphological data used few skeletal characters from this complex. In this paper, the phylogenetic significance of pelvic articular characters for elasmobranchs is discussed in light of the morphological variation observed in 130 species, the most comprehensive study exploring the morphology of the pelvic girdle done so far. The 10 morphological characters proposed herein for the pelvic articulation were incorporated into a molecular matrix of NADH2 sequences and submitted to an analysis of maximum parsimony employing extended implied weighting. The most stable tree was selected based on the distortion coefficients, SPR distances (subtree pruning and regrafting) and fit values. Some of the striking synapomorphies recovered within elasmobranchs include the presence of an articular surface for the first enlarged pelvic radial supporting Elasmobranchii and the pelvic articular region for the basipterygium extending from the posterolatral margin of the pelvic girdle over its lateral surface in Echinorhinus + Hexanchiformes. Additionally, the proposed characters and their distributions are discussed considering the relationships recovered and also compared with previous morphological and molecular phylogenetic hypotheses.

show abstract

A new synapomorphy in the pelvic girdle reinforces a close relationship of Zanobatus and Myliobatiformes (Chondrichthyes: Batoidea)

Cited by 5 publications

References 29 publications

The appendicular skeleton of the enigmatic shark Leptocharias smithii in comparison with other sharks of the order Carcharhiniformes (Elasmobranchii: Leptochariidae)

The appendicular skeleton of the enigmatic shark Leptocharias smithii in comparison with other sharks of the order Carcharhiniformes (Elasmobranchii: Leptochariidae)

The importance of the appendicular skeleton for the phylogenetic reconstruction of lamniform sharks (Chondrichthyes: Elasmobranchii)

Morphology and phylogenetic significance of the pelvic articular region in elasmobranchs (Chondrichthyes)

Contact Info

Product

Resources

About