First Mesozoic Record of the Stingray<i>Myliobatis wurnoensis</i>from Mali and a Phylogenetic Analysis of Myliobatidae Incorporating Dental Characters

Claeson, Kerin M.; O’Leary, Maureen A.; Roberts, Eric M.; Sissoko, Famory; Bouaré, Mamadou L.; Tapanila, Leif; Goodwin, David H.; Gottfried, Michael D.

doi:10.4202/app.2009.1117

Cited by 47 publications

(86 citation statements)

References 34 publications

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“…Fossil, morphological and molecular data support the hypothesis that mobulids are one of the most derived groups of elasmobranchs and closely related to rhinopterids (cownose rays, genus Rhinoptera) within a polyphyletic clade of Myliobatidae Aschliman et al, 2012a;Claeson et al, 2010;De Carvalho et al, 2004;Dunn et al, 2003;Lovejoy, 1996;McEachran and Aschliman, 2004;McEachran et al, 1996;Nishida, 1990;Shirai, 1996). However, a sister-clade relationship to a myliobatid-rhinopterid clade has also been proposed (Gonzalez-Isais and Dominguez, 2004) solely based on morphological data.…”

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confidence: 75%

A dated molecular phylogeny of manta and devil rays (Mobulidae) based on mitogenome and nuclear sequences

Poortvliet

Olsen

Croll

et al. 2015

Molecular Phylogenetics and Evolution

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a b s t r a c tManta and devil rays are an iconic group of globally distributed pelagic filter feeders, yet their evolutionary history remains enigmatic. We employed next generation sequencing of mitogenomes for nine of the 11 recognized species and two outgroups; as well as additional Sanger sequencing of two mitochondrial and two nuclear genes in an extended taxon sampling set. Analysis of the mitogenome coding regions in a Maximum Likelihood and Bayesian framework provided a well-resolved phylogeny. The deepest divergences distinguished three clades with high support, one containing Manta birostris, Manta alfredi, Mobula tarapacana, Mobula japanica and Mobula mobular; one containing Mobula kuhlii, Mobula eregoodootenkee and Mobula thurstoni; and one containing Mobula munkiana, Mobula hypostoma and Mobula rochebrunei. Mobula remains paraphyletic with the inclusion of Manta, a result that is in agreement with previous studies based on molecular and morphological data. A fossil-calibrated Bayesian random local clock analysis suggests that mobulids diverged from Rhinoptera around 30 Mya. Subsequent divergences are characterized by long internodes followed by short bursts of speciation extending from an initial episode of divergence in the Early and Middle Miocene (19-17 Mya) to a second episode during the Pliocene and Pleistocene (3.6 Mya -recent). Estimates of divergence dates overlap significantly with periods of global warming, during which upwelling intensity -and related high primary productivity in upwelling regions -decreased markedly. These periods are hypothesized to have led to fragmentation and isolation of feeding regions leading to possible regional extinctions, as well as the promotion of allopatric speciation. The closely shared evolutionary history of mobulids in combination with ongoing threats from fisheries and climate change effects on upwelling and food supply, reinforces the case for greater protection of this charismatic family of pelagic filter feeders.

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confidence: 75%

A dated molecular phylogeny of manta and devil rays (Mobulidae) based on mitogenome and nuclear sequences

Poortvliet

Olsen

Croll

et al. 2015

Molecular Phylogenetics and Evolution

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“…The use of metal models isolated the effect of the morphology of the jaws from any material differences in the jaws and from any effect of the shape and interdigitating pattern of the teeth. In addition to the musculoskeletal differences among these stingrays, we might expect that the tooth interdigitation pattern, long recognized as a taxonomic character (Claeson et al, 2010), has some effect on crushing performance. Regardless, the forces necessary to crush any of the examined live prey (from 22 to 486 N, peak loading) were well within the performance bounds (>500 N) calculated for Rhinoptera bonasus, the only myliobatid ray for which bite force has been examined to date (Kolmann et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Morphology does not predict performance: jaw curvature and prey crushing in durophagous stingrays

Kolmann

Crofts

Dean

et al. 2015

Journal of Experimental Biology

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All stingrays in the family Myliobatidae are durophagous, consuming bivalves and gastropods, as well as decapod crustaceans. Durophagous rays have rigid jaws, flat teeth that interlock to form pavement-like tooth plates, and large muscles that generate bite forces capable of fracturing stiff biological composites (e.g. mollusk shell). The relative proportion of different prey types in the diet of durophagous rays varies between genera, with some stingray species specializing on particular mollusk taxa, while others are generalists. The tooth plate module provides a curved occlusal surface on which prey is crushed, and this curvature differs significantly among myliobatids. We measured the effect of jaw curvature on prey-crushing success in durophagous stingrays. We milled aluminum replica jaws rendered from computed tomography scans, and crushed live mollusks, three-dimensionally printed gastropod shells, and ceramic tubes with these fabricated jaws. Our analysis of prey items indicate that gastropods were consistently more difficult to crush than bivalves (i.e. were stiffer), but that mussels require the greatest work-to-fracture. We found that replica shells can provide an important proxy for investigations of failure mechanics. We also found little difference in crushing performance between jaw shapes, suggesting that disparate jaws are equally suited for processing different types of shelled prey. Thus, durophagous stingrays exhibit a many-to-one mapping of jaw morphology to mollusk crushing performance.

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“…Our data matrix consists of 34 jaw and dental characteristics for 26 OTUs, as well as 43 additional morphological characters from Claeson et al, (2010). Seven of these taxa are in-group myliobatids (Rhinopterines, Mobulines, Myliobatines, and Aetobatines), with Raja and Rhinobatos rooted as our nominal outgroups to all myliobatiforms (stingrays).…”

Section: Specimens Of Sulcidens Sulcidensmentioning

confidence: 99%

“…The most-inclusive molecular study (Aschliman et al, 2012) place skates (Rajidae) as sister to all other batoids, with a paraphyletic assemblage of guitarfishes as sister to remaining myliobatiforms and allies (Hexatrygonidae, Zanobatidae, Plesiobatidae). Fourteen characters were modified from Claeson et al (2010), with only two characters (presence/absence of lower jaw "wing processes;" fusion of the medial jaw symphyses) regarding the condition of the jaws taken from other sources Lovejoy, 1996 andClaeson et al, 2010, respectively).…”

Section: Specimens Of Sulcidens Sulcidensmentioning

confidence: 99%

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Paleogene origin of planktivory in the Batoidea

Underwood

Kolmann

Ward

2017

Journal of Vertebrate Paleontology

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ABSTRACT-The planktivorous mobulid rays are a sister group to, and descended from, rhinopterid and myliobatid rays which possess a dentition showing adaptations consistent with a specialized durophageous diet. Within the Paleocene and Eocene there are several taxa which display dentitions apparently transitional between these extreme trophic modality, in particular the genus Burnhamia. The holotype of Burnhamia daviesi was studied through X-ray computed tomography (CT) scanning.Digital renderings of this incomplete but articulated jaw and dentition revealed previously unrecognized characters regarding the jaw cartilages and teeth. In addition, the genus Sulcidens gen. nov. is erected for articulated dentitions from the Paleocene previously assigned to Myliobatis. Phylogenetic analyses confirm Burnhamia as a sister taxon to the mobulids, and the Mobulidae as a sister group to Rhinoptera. Shared dental characters between Burnhamia and Sulcidens likely represent independent origins of planktivory within the rhinopterid -myliobatid clade. The transition from highly-specialized durophagous feeding morphologies to the morphology of planktivores is perplexing, but was facilitated by a pelagic swimming mode in these rays and we propose through subsequent transition from either meiofauna-feeding or pelagic fish-feeding to pelagic planktivory.

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First Mesozoic Record of the StingrayMyliobatis wurnoensisfrom Mali and a Phylogenetic Analysis of Myliobatidae Incorporating Dental Characters

Abstract: New specimens, including the first record of lower dental plates, of the extinct myliobatid

Cited by 47 publications

References 34 publications

A dated molecular phylogeny of manta and devil rays (Mobulidae) based on mitogenome and nuclear sequences

A dated molecular phylogeny of manta and devil rays (Mobulidae) based on mitogenome and nuclear sequences

Morphology does not predict performance: jaw curvature and prey crushing in durophagous stingrays

Paleogene origin of planktivory in the Batoidea

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