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Comparative analysis of the morphology of the feeding apparatus in Myliobatiform rays (Chondrichthyes: Batoidea)

Grant number: 12/09877-0
Support type:Regular Research Grants
Duration: August 01, 2012 - July 31, 2015
Field of knowledge:Biological Sciences - Zoology - Morphology of Recent Groups
Principal researcher:Marcelo Rodrigues de Carvalho
Grantee:Marcelo Rodrigues de Carvalho
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Assoc. researchers:Akemi Shibuya


The euhyostilic jaw suspension of batoids is effected only by the hyomandibular cartilagessupporting the mandibular elements, without any articulation or connection between theneurocranium and palatoquadrate. However, morphological differences in the feeding apparatus andorobranchial musculature can lead to different prey capture and manipulation modes in batoids. Inaddition, some species are capable of feeding on hard prey, such as mollusks and crustaceans, whichmay be related to trabeculation of the palatoquadrate and Meckelian cartilages that absorb the stressgenerated by crushing prey of this type. Thus, in order to understand the evolution and function of thejaw suspension in myliobatiforms, the arrangement and morphology of the jaw suspension andassociated orobranchial musculature will be extensively analyzed in species of this order. Themorphology of the feeding apparatus will be related to existing information on the diet and feedinghabits of the analyzed species. Specimens will be obtained from museums and collections fordissection. The orobranchial musculature will be removed and its performance during prey captureand manipulation will be analyzed using the value of relative dry mass of each muscle set involved inthe feeding process. The morphology of jaw suspension will be described and the palatoquadrate andMeckelian cartilages will be analyzed histologically to reveal trabeculation. To comprehend theevolutionary significance of the different feeding patterns, the results will be incorporated intoavailable phylogenetic hypotheses for myliobatiform rays. The relationship between a specificfeeding apparatus and its functionality, in relation to the consumption of different prey types, mayprovide information concerning the peculiar feeding mechanics of myliobatiform species, and mayalso contribute to clarify the evolution of this order. (AU)

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Scientific publications (19)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PETEAN, FLAVIA DE FIGUEIREDO; DE CARVALHO, MARCELO R. Comparative morphology and systematics of the cookiecutter sharks, genus Isistius Gill (1864) (Chondrichthyes: Squaliformes: Dalatiidae). PLoS One, v. 13, n. 8 AUG 20 2018. Web of Science Citations: 0.
DA SILVA, JOAO PAULO C. B.; VAZ, DIEGO F. B.; DE CARVALHO, MARCELO R. Phylogenetic inferences on the systematics of squaliform sharks based on elasmobranch scapular morphology (Chondrichthyes: Elasmobranchii). ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, v. 182, n. 3, p. 614-630, MAR 2018. Web of Science Citations: 1.
JONES, CHRISTIAN M.; HOFFMAYER, ERIC R.; HENDON, JILL M.; QUATTRO, JOSEPH M.; LEWANDOWSKI, JUSTIN; ROBERTS, MARK A.; POULAKIS, GREGG R.; AJEMIAN, MATTHEW J.; DRIGGERS, III, WILLIAM B.; DE CARVALHO, MARCELO R.; REGO, MARIANA G.; HAZIN, FABIO H. V.; MARQUEZ-FARIAS, J. FERNANDO. Morphological conservation of rays in the genus Rhinoptera (Elasmobranchii, Rhinopteridae) conceals the occurrence of a large batoid, Rhinoptera brasiliensis Muller, in the northern Gulf of Mexico. Zootaxa, v. 4286, n. 4, p. 499-514, JUL 4 2017. Web of Science Citations: 2.
WEIGMANN, SIMON; VAZ, DIEGO F. B.; WHITE, WILLIAM T.; DE CARVALHO, MARCELO R.; THIEL, RALF. Distribution and comments on the morphology of Centroscymnus owstonii Garman, 1906 (Squaliformes: Somniosidae), with focus on its occurrence in the Indian Ocean. MARINE BIODIVERSITY, v. 46, n. 3, p. 641-653, SEP 2016. Web of Science Citations: 2.
VIANA, SARAH T. DE F.; DE CARVALHO, MARCELO R.; GOMES, ULISSES L. Taxonomy and morphology of species of the genus Squalus Linnaeus, 1758 from the Southwestern Atlantic Ocean (Chondrichthyes: Squaliformes: Squalidae). Zootaxa, v. 4133, n. 1, p. 1-89, JUL 4 2016. Web of Science Citations: 12.
VIANA, SARAH T. DE F.; DE CARVALHO, MARCELO R. Redescription of Squalus acutipinnis Regan, 1908, a Valid Species of Spiny Dogfish from Southern Africa (Chondrichthyes: Squaliformes: Squalidae). Copeia, v. 104, n. 2, p. 539-553, JUL 2016. Web of Science Citations: 7.
DE CARVALHO, MARCELO R.; WHITE, WILLIAM T. Narcine baliensis, a new species of electric ray from southeast Asia (Chondrichthyes: Torpediniformes). Zootaxa, v. 4127, n. 1, p. 149-160, JUN 22 2016. Web of Science Citations: 1.
DE CARVALHO, MARCELO R.; ROSA, RICARDO S.; DE ARAUJO, MARIA LUCIA G. A new species of Neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae) from the Rio Negro, Amazonas, Brazil: the smallest species of Potamotrygon. Zootaxa, v. 4107, n. 4, p. 566-585, MAY 4 2016. Web of Science Citations: 9.
FONTENELLE, JOAO PEDRO; DE CARVALHO, MARCELO R. Systematic Implications of Brain Morphology in Potamotrygonidae (Chondrichthyes: Myliobatiformes). Journal of Morphology, v. 277, n. 2, p. 252-263, FEB 2016. Web of Science Citations: 6.
SOARES, KARLA D. A.; GOMES, ULISSES L.; DE CARVALHO, MARCELO R. Taxonomic review of catsharks of the Scyliorhinus haeckelii group, with the description of a new species (Chondrichthyes: Carcharhiniformes: Scyliorhinidae). Zootaxa, v. 4066, n. 5, p. 501-534, JAN 19 2016. Web of Science Citations: 3.
DA SILVA, JOAO PAULO C. B.; VAZ, DIEGO F. B.; DE CARVALHO, MARCELO R. Systematic Implications of the Anterior Pectoral Basals in Squaliform Sharks (Chondrichthyes: Elasmobranchii). Copeia, v. 103, n. 4, p. 874-885, DEC 2015. Web of Science Citations: 3.
DA SILVA, JOAO PAULO C. B.; DE CARVALHO, MARCELO R. Morphology and phylogenetic significance of the pectoral articular region in elasmobranchs (Chondrichthyes). Zoological Journal of the Linnean Society, v. 175, n. 3, p. 525-568, NOV 2015. Web of Science Citations: 9.
DA SILVA, JOAO PAULO C. B.; DE CARVALHO, MARCELO R. Systematics and morphology of Potamotrygon orbignyi (Castelnau, 1855) and allied forms (Chondrichthyes: Myliobatiformes: Potamotrygonidae). Zootaxa, v. 3982, n. 1, p. 1-82, JUL 8 2015. Web of Science Citations: 13.
SHIBUYA, AKEMI; DE CARVALHO, MARCELO R.; ZUANON, JANSEN; TANAKA, SHO. The use of pelvic fins for benthic locomotion during foraging behavior in Potamotrygon motoro (Chondrichthyes: Potamotrygonidae). Zoologia, v. 32, n. 3, p. 179-186, MAY-JUN 2015. Web of Science Citations: 1.
EBERT, DAVID A.; HAAS, DIANE L.; DE CARVALHO, MARCELO R. Tetronarce cowleyi, sp nov., a new species of electric ray from southern Africa (Chondrichthyes: Torpediniformes: Torpedinidae). Zootaxa, v. 3936, n. 2, p. 237-250, MAR 19 2015. Web of Science Citations: 2.
WHITE, WILLIAM T.; VAZ, DIEGO F. B.; HO, HSUAN-CHING; EBERT, DAVID A.; DE CARVALHO, MARCELO R.; CORRIGAN, SHANNON; ROCHEL, ELISABETH; DE CARVALHO, MURILO; TANAKA, SHO; NAYLOR, GAVIN J. P. Redescription of Scymnodon ichiharai Yano and Tanaka 1984 (Squaliformes: Somniosidae) from the western North Pacific, with comments on the definition of somniosid genera. ICHTHYOLOGICAL RESEARCH, v. 62, n. 2, p. 213-229, JAN 2015. Web of Science Citations: 4.
FONTENELLE, JOAO PEDRO; DA SILVA, JOAO PAULO C. B.; DE CARVALHO, MARCELO R. Potamotrygon limai, sp nov., a new species of freshwater stingray from the upper Madeira River system, Amazon basin (Chondrichthyes: Potamotrygonidae). Zootaxa, v. 3765, n. 3, p. 249-268, FEB 18 2014. Web of Science Citations: 18.
CARVALHO, MURILO; BOCKMANN, FLAVIO ALICINO; DE CARVALHO, MARCELO RODRIGUES. Homology of the Fifth Epibranchial and Accessory Elements of the Ceratobranchials among Gnathostomes: Insights from the Development of Ostariophysans. PLoS One, v. 8, n. 4 APR 18 2013. Web of Science Citations: 15.

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