Phylogeny of elasmobranchs based on LSU and SSU ribosomal RNA genes

Winchell, Christopher J.; Martin, Andrew P.; Mallatt, Jon

doi:10.1016/j.ympev.2003.07.010

Cited by 118 publications

(120 citation statements)

References 44 publications

Supporting

Mentioning

108

Contrasting

Unclassified

Order By: Relevance

“…1A). Molecular data, however, do not support the hypnosqualean hypothesis and place batoids outside the sharks (Douady et al 2003;Winchell et al 2004). In the analysis of Douady et al (2003), Squatiniformes and Pristiophoriformes form a monophyletic grouping, which is sister to the more derived Squaliformes.…”

Section: Phylogenetic Implicationsmentioning

confidence: 91%

“…This arrangement, however, requires rather long ghost lineages if calibrated with the occurrence of fossil representatives. In the analyses of Winchell et al (2004), conversely, Squatiniformes is sister to a clade consisting of Squaliformes and Pristiophoriformes (Fig. 1B).…”

Section: Phylogenetic Implicationsmentioning

confidence: 93%

“…Douady et al (2003) found a similar arrangement of squalomorph taxa in their molecular study of neoselachian interrelationships. In a more extensive molecular study of neoselachian phylogenetics, Winchell et al (2004) identified hexanchiform sharks represented by Chlamydoselachidae to be the basal sister group of Squatiniformes. This arrangement and placement of Squaliformes and Pristiophoriformes as being more derived in comparison to Squatiniformes is in better agreement with the fossil record, reducing the number of ghost lineages of Squatiniformes and more derived squalomorphs considerably (Fig.…”

Section: Phylogenetic Implicationsmentioning

confidence: 99%

“…Douady et al 2003;Dunn et al 2003;Winchell et al 2004;Iglesias et al 2005;Naylor et al 2005;Human et al 2006;Mallat & Winchell 2007;Straube et al 2011). Nevertheless, only a few analyses calculating divergence and origination dates have been performed so far (e.g.…”

Section: Node Age Estimates and Molecular Clock Constraintsmentioning

confidence: 99%

See 3 more Smart Citations

Node age estimations and the origin of angel sharks, Squatiniformes (Neoselachii, Squalomorphii)

Klug

Kriwet

2013

Journal of Systematic Palaeontology

View full text Add to dashboard Cite

The fossil record of angel sharks is reviewed with special focus on skeletal remains. A new family †Pseudorhinidae is established for two species based on complete specimens from the Late Jurassic and a possible third species based on isolated teeth. This clade is a member of the stem lineage of Squatiniformes. Squatinidae represents the crown with a reliable fossil record extending back into the Aptian based on a partial skeleton displaying characteristic morphological traits of Squatina. We also present revised morphological descriptions of the skeletal remains of †Squatina baumbergensis (Campanian of Germany) and †Squatina sp. (Miocene of Japan). In this study, we used reliable skeletal remains and a modified approach to establish the origin and divergence of the Squatiniformes and the Squatinidae. Isolated teeth are considered to be unreliable because of the poor knowledge of squatiniform dental character traits and their evolution. We estimate a 'hard' minimum age constraint of 156.2 Ma and a 'soft' maximum age constraint of 181.74 Ma for the origin of the Squatiniformes. For the crown represented by the Squatinidae, we estimate a 'hard' minimum age constraint of 114 Ma and a 'soft' maximum age constraint of 157.59 Ma. These age constraints most likely designate the timing of the origin of identifiable squatiniform and squatinid characters as currently understood rather than the origin of the Squatiniformes or the divergence between the †Pseudorhinidae and the Squatinidae. The lack of pre-Late Jurassic pseudorhinids and pre-Cretaceous squatinids probably represents an artefact because characteristic squatiniform tooth morphologies, which generally provide only a restricted set of diagnosable features, might not have yet been fully developed. Consequently, skeletal remains of neoselachians from the Early and Middle Jurassic are crucial for establishing reliable characters of stem-lineage representatives and to avoid misinterpretations resulting from transferring morphological traits of the crown to fossil groups with unresolved interrelationships, as well as sister-group relations.http://zoobank.org/urn:lsid:zoobank.org:pub:5A5FA554-C834-48E3-AE44-6F92DE9CB5F1

show abstract

Section: Phylogenetic Implicationsmentioning

confidence: 91%

Section: Phylogenetic Implicationsmentioning

confidence: 93%

Section: Phylogenetic Implicationsmentioning

confidence: 99%

Section: Node Age Estimates and Molecular Clock Constraintsmentioning

confidence: 99%

See 2 more Smart Citations

Node age estimations and the origin of angel sharks, Squatiniformes (Neoselachii, Squalomorphii)

Klug

Kriwet

2013

Journal of Systematic Palaeontology

View full text Add to dashboard Cite

show abstract

“…These fishes were shuffled among many branches of elasmobranchs; sometimes aligned closely with batoids, sometimes squaloids, and sometimes both depending on the study (Seret 1986;Shirai 1992aShirai , 1992bShirai , 1996 and references therein). Most recently two well supported but drastically different competing hypotheses based on morphology and molecules posit batoids as derived sharks closely related to angel sharks and sawsharks (Shirai 1992a(Shirai , 1992b(Shirai , 1996, or as the sister group to a monophyletic group of sharks with no relationship to angel sharks respectively (Douady et al 2003;Winchell et al 2004;Heinicke et al 2009, V lez-Zuazo & Agnarsson 2011 (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Morphology of the anterior vertebral region in elasmobranchs: special focus, Squatiniformes

Claeson

Hilger

2011

Fossil Record

View full text Add to dashboard Cite

The morphology of extant and extinct Squatiniformes is well conserved within this lineage, but differences are of consequence to character interpretations for phylogenetic analyses. Investigation of the extinct taxon †Pseudorhina alifera (Münster, 1842) from the Late Jurassic of Solnhofen with extant species of Squatina provide new evidence that members of Squatiniformes possess a basioccipital fovea. Presence of a basioccipital fovea is the ancestral condition in Neoselachians and hypothesized to be lost in members of Hypnosqualea. In addition, species of Squatina all posses a reduced occipital hemicentrum while the occipital hemicentrum in †Pseudorhina is unreduced, indicating the condition in Squatina is an example of postdisplacement heterochrony. Pristiophoriformes and Batoidea also are characterized by a lack of a basioccipital fovea and hemicentrum. However, extinct members of Batoidea, such as †Spathobatis, and modern taxa do possess a distinct notch in the posterior basicranium ventral to the foramen magnum. Except for the lack of an associated occipital hemicentrum, this notch is similar to the basioccipital fovea, but its homology is not yet addressed. Furthermore, within all species of Squatiniformes and Pristiophoriformes, as well as some members of Orectolobiformes and Carcharhiniformes, basiventral cartilages are laterally expanded, contributing to a broad articulation with the occipital condyle. The disparate taxa with modifications to the basiventral cartilages suggest a significant functional, rather than phylogenetic, signal for this feature. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

Variability and Conservation in Late Chondrichthyan Development: Ontogeny of the Winter Skate (Leucoraja ocellata)

Maxwell

Fröbisch

Heppleston

2008

The Anatomical Record

View full text Add to dashboard Cite

The ontogeny of the northwestern Atlantic batoid, Leucoraja ocellata, is described with special focus on the development of skate specific morphologies and the development of the fins. The results show that the sequence of events involving the early outgrowth of the paired fins and the initial development of the pharyngeal region is remarkably constant in skates, holocephalians, and sharks. However, differences exist in timing of the reshaping of the mandibular arch region, development of branchial filaments, median fins, denticles, and the order of branchial cleft formation. Despite the similarities of early events related to development of the branchial region and initial outgrowth of the fins, later stages are increasingly characterized by taxon-specific morphologies making a universal staging table for chondrichthyans less applicable. The staging table presented in this study represents an important resource for future studies on batoid embryology.

show abstract

Phylogeny of elasmobranchs based on LSU and SSU ribosomal RNA genes

Cited by 118 publications

References 44 publications

Node age estimations and the origin of angel sharks, Squatiniformes (Neoselachii, Squalomorphii)

Node age estimations and the origin of angel sharks, Squatiniformes (Neoselachii, Squalomorphii)

Morphology of the anterior vertebral region in elasmobranchs: special focus, Squatiniformes

Variability and Conservation in Late Chondrichthyan Development: Ontogeny of the Winter Skate (Leucoraja ocellata)

Contact Info

Product

Resources

About