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Tomo I Descargar Archivo Agradecimientos Aunque soy una persona de pocas palabras y me cuesta bastante escribir este apartado, en esta oportunidad debo y quiero agradecer a las personas que me han acompañado durante este proceso de tesis. Muchas de ellas estuvieron constantemente al lado mío y otras me ayudaron en ciertos momentos. Sin la ayuda de todos ellos, esta tesis no sería lo que es hoy. Este trabajo me dio la oportunidad de conocer mucha gente buena. Los congresos, las visitas a los museos, las campañas y los distintos lugares que he conocido gracias a este trabajo me han permitido conocer excelentes personas. A mi modo de ver las cosas, lo más importante es rodearse de buena gente, y es lo que conseguí con este trabajo. Voy a intentar agradecer a todos los que formaron parte de este proceso de aprendizaje. Espero no olvidarme de nadie, y si lo hago, espero que no se ofendan y sepan disculpar; no es por ingratitud sino por falta de memoria. Todos contribuyeron, en distinta medida, a mi formación profesional, por lo que resultan importantes para mí y claramente el resultado sería otro si no hubieran estado todos y cada uno de ellos. En primer lugar agradezco a mis directores, Paula Bona y Leandro Alcalde, quienes aceptaron dirigirme. A Pau por guiarme, apoyarme y haberme acompañado en todo este largo camino. Por confiar en mí desde un principio y ayudarme siempre. Por los interminables consejos, charlas, enseñanzas y oportunidades que me brindó. Por haber alcanzado y superado mis expectativas. A Lean por hacer que me divierta y aprenda al mismo tiempo. Por enseñarme a disfrutar y a tomar el trabajo de tesis con calma. A ambos, por el cariño, el respeto y el vínculo establecido. No tengo más que palabras de agradecimiento y gratitud para con ellos. Por haber sido algo más que mis directores. Los elegí, los elijo y los volvería a elegir. Quiero agradecer especialmente a Julia Desojo quien siempre, desde el primer momento, me ayudó con todo lo que ha podido de manera desinteresada. Fueron múltiples las ocasiones en las que recibí su apoyo. Hemos compartido muchos y varios momentos, tanto laborales como personales, a partir de los cuales se ha desarrollado una linda amistad. También debo hacer una mención especial a Guillermo Cassini, que a pesar de estar tapado de trabajo, siempre se hizo un lugarcito para mis innumerables consultas. Siempre estuvo para ayudarme. Le debo mucho pero no me alcanza este apartado para decir cuánto. Es un tipo admirable, no solo por sus habilidades laborales, sino por su bondadosa personalidad. Tuve la suerte de conocerlo y espero que sigamos trabajando juntos, por lo menos, varios años más. Por otro lado, agradezco a lo más importante que una persona pueda tener en la vida: familia, amigos y pareja. A mi mamá, mi papá y mi hermano…por TODO, porque son mi sostén y lo más importante que tengo en la vida. Por el apoyo incondicional, la paciencia y el aguante. Por enseñarme el valor del esfuerzo, el trabajo y la dedicación. Por hacer de mi lo que soy hoy. A Nicolás, mi amor, por enseñarme a vivir una vida más tranquila y relajada (todavía estoy en proceso de aprendizaje) y por enseñarme a distinguir cuáles son las verdaderas cosas importantes de la vida. A mi abuela Mimi que siempre estuvo para cocinarme las comidas más ricas del mundo y me aguantó sobre todo en la etapa final de la tesis, que es la más crítica. A mis amigos de la escuela y de la facultad, Celes, Mary, Deny, Luli, Fanny, Pablito, Facu, que me acompañaron en este recorrido. A Euge y Juli por estar siempre y ayudarme en esos momentos críticos donde uno quiere tirar todo por la ventana e irse a su casa. Por todos los lindos momentos que pasamos y seguiremos pasando juntas, ya que encontré dos buenas amigas que quedarán por siempre. A las “Cachitas” por hacerme pasar momentos tan lindos y sobretodo divertidos. A mis antiguos compañeros de Anatomía Comparada que desde el principio me recibieron muy bien y me incluyeron en el grupo. Si bien de todos he aprendido y me llevo algo, agradezco particularmente a José O’ Gorman por su apoyo. Al personal técnico y científico del ILPLA y, en especial, a Lucila por su alegría y apoyo constante. A Marcela Tomeo, Mariano Donato y Alejandro Otero por el apoyo moral y por ayudarme con la parte gráfica del trabajo. A Ana Carignano por la ayuda con la bibliografía de la tesis. A Eugenia Arnaudo, Juliana Tarquini, Clelia Mosto y Belén von Baczko por su ayuda con distintas dificultades que se me presentaron durante la tesis. A Lolo y Dario por facilitarme el acceso a la cámara de la lupa. A Sergio O. Lucero por los cafes, las charlas y la buena onda de siempre. A Itatí Olivares por la cordialidad y excelente predisposición. A Iván Perez, Leandro Arístide y Nahuel Muñoz por su ayuda con R. A Martin Ezcurra por su constante presencia y ayuda con distintos temas, y por hacerme divertir mucho. A Regina Draghi por su ayuda con la edición de la tesis. A los becarios de Paleontología Vertebrados del Anexo Museo, con los que comparto el lugar de trabajo, por su apoyo moral y los momentos divertidos que compartimos. Las salidas a tomar algo luego del trabajo o a la noche, sirvieron para que me despeje y pueda descansar un poco. A la gente de “El Cachapé” que nos brindaron alojamiento y colaboraron con las campañas neontológicas en El Chaco. A la Dirección de Fauna y Áreas Naturales Protegidas de la provincia del Chaco. A los jefes de las divisiones de Herpetología del MLP y MACN por permitirme el acceso a las colecciones. A Zulma Brandoni de Gasparini, Martín Daniel Ezcurra y Carlos Ignacio Piña por aceptar evaluar esta tesis y por sus valiosos comentarios y sugerencias. A CONICET por otorgarme la beca doctoral y así facilitar la realización de este trabajo de tesis. TOMO I Resumen .................................................................................................................................. I Abstract ................................................................................................................................ VII Introducción general .............................................................................................................. 1 I.1.Introducción ...................................................................................................................... 3 I.1.1.Biología de las especies argentinas actuales del género Caiman .............................. 6 I.2.Objetivos e hipótesis de trabajo ................................................................................... 11 I.2.1.Objetivo general ...................................................................................................... 11 I.2.2.Objetivos específicos ............................................................................................... 11 I.2.3.Hipótesis ................................................................................................................. 12 I.3.Organización del presente Trabajo de Tesis Doctoral ................................................... 12 Capítulo I: Estudio embrionario .......................................................................................... 15 I.1.Introducción .................................................................................................................... 17 I.2.Materiales y métodos ..................................................................................................... 18 I.2.1.Determinación de estadios embrionarios .............................................................. 24 I.3.Resultados ....................................................................................................................... 25 I.3.1.Esqueleto axial ......................................................................................................... 25 I.3.1.1.Cráneo ................................................................................................................ 25 I.3.1.1.1.Condrocráneo ............................................................................................... 25 I.3.1.1.1.1.Neurocráneo ........................................................................................... 25 Región etmoidea .................................................................................................... 25 Región orbitotemporal ........................................................................................... 28 Región ótico-occipital ............................................................................................ 30 I.3.1.1.1.2.Esplacnocráneo ....................................................................................... 32 Arco mandibular ..................................................................................................... 32 Arcos hioideo y branquiales ................................................................................... 34 Cartílagos laríngeos y tráquea ............................................................................... 37 I.3.1.1.2.Osteocráneo ................................................................................................. 39 I.3.1.1.2.1.Consideraciones generales sobre la osificación craneana de ambas especies ....................................................................................................................... 39 I.3.1.1.2.2.Generalidades del osteocráneo adulto de ambas especies ................... 39 I.3.1.1.2.3.Descripción del desarrollo embrionario de los huesos craneanos de ambas especies, secuencia de osificación y estructura adulta ......................................
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