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First record of abnormal cephalic horns in the California bat ray Myliobatis californica

  • Sergio R. Ramírez-Amaro (a1), Gerardo González-Barba (a2), Felipe Galván-Magaña (a1) and Daniel Cartamil (a3)
Abstract

The first case of abnormal cephalic horns in the California bat ray, Myliobatis californica was found in one male juvenile specimen caught in a gillnet by artisanal elasmobranch fishermen on the west coast of Baja California Sur, Mexico. The specimen had three cephalic horns, two in the cephalic lobes zone and one in the rostral middle zone which could be indicative of a morphogenetic plasticity in these taxa that may have facilitated the evolution of rhinopterid and mobulid species from a common myliobatid ancestor with a similar role of feeding in Mobulidae and Rhinopteridae subfamilies.

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Corresponding author
Correspondence should be addressed to: F. Galván-Magaña, Centro Interdisciplinario de Ciencias Marinas, Avenida Instituto Politécnico Nacional, s/n Col. Playa Palo de Santa Rita, La Paz, B.C.S. 23096, México email: galvan.felipe@gmail.com
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O.M. Bejarano-Álvarez , F. Galván-Magaña and I. Ochoa-Báez (2011) Further observations on foetal abnormalities in the blue shark Prionace glauca (Chondrichtyes: Carcharhinidae) from north-west México. Marine Biodiversity Records 4, e82. DOI: http://dx.doi.org/10.1017/S1755267211000790.

M.R. Heupel , C.A. Simpfendorfer and M.B. Bennet (1999) Skeletal deformities in elasmobranchs from Australian waters. Journal of Fish Biology 54, 11111115.

A.E. Gray , T.J. Mulligan and R.W. Hannah (1997) Food habits, occurrence, and population structure of the bat ray, Myliobatis californica, in Humboldt Bay, California. Environmental Biology of Fishes 49, 227238.

P.L. Mancini , A.L. Casas and A.F. Amorim (2006) Morphological abnormalities in a blue shark Prionace glauca (Chondrichthyes: Carcharhinidae) foetus from southern Brazil. Journal of Fish Biology 69, 18811884.

L.K. Martin and G.M. Cailliet (1988) Aspects of the reproduction of the bat ray, Myliobatis californica, in Central California. Copeia 1988, 754762.

T. Miyake , J.D. McEachran , P.J. Walton and B.K. Hall (1992) Development and morphology of rostral cartilages in batoid fishes (Chondrichthyes: Batoidea), with comments on homology within vertebrates. Biological Journal of the Linnean Society 46, 259298.

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Marine Biodiversity Records
  • ISSN: -
  • EISSN: 1755-2672
  • URL: /core/journals/marine-biodiversity-records
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