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GRADUATE STUDENTS

  • Rafael Cerón Gómez

    Phylogenetic relationships of Pasimachus Bonelli (Carabidae) with traditional and geometric morphometric characters

    My research focuses on the debate on the phylogenetic relationships of Pasimachus with respect to other genera and its tribal position. The most accepted proposal considers it as the sister group of Mouhotia Castelnau, an oriental genus with three species, as the only members within Pasimachini; another proposal considers Pasimachus as the only representative of the Pasimachina subtribe. With phylogenetic analysis with traditional morphological characters and five structural modules coded with Geometric Morphometry, I try to know the relationships of the 34 species of Pasimachus and their affinities at the tribal level (Scaritini and Carenini). The results with a single cladogram validate Pasimachini (Pasimachus + Mouhotia), and supraspecific arrangements are proposed at the subgeneric level within Pasimachus. The relevance of the Transverse Volcanic Axis as an element that has favored the generation of an important pattern o vicariance in the evolution of Pasimachus is discussed, as well as the analysis of the evolution of the evaluated structural modules.

  • Karla Andalco Cid

    Taxonomic revision of the Mexican species of the genus Strigoderma Burmeister

    My project focuses on a taxonomic revision of the species of the genus Strigoderma Burmeister with distribution in Mexico, which includes a detailed reassessment of external and internal morphology, as well as biogeography that allow us to adequately delimit the species. Historically, the diversity of this taxon has been underestimated, especially in the case of species with wide morphological variation and wide geographic distributions. I am interested in providing relevant, novel and complementary taxonomic information for the recognition of intra- and interspecific variation, and proposing a supraspecific arrangement within the group, with interpretations of the evolution of characters and biogeography.

  • Jocelyn Jacinto Estanes

    Morphological and molecular phylogeny of Pelidnotine scarabs

    My study focuses on the phylogeny of the Pelidnotina subtribe made up of 27 genera and 420 species exclusive to America. It presents a complicated taxonomy, since in 21 of its 27 genera there are doubts about its belonging to the subtribe itself or related taxa, and there are no phylogenetic works that address the problem. An example are the genera Chipita Soula (Pelidnotina) and Platyrutela Bates (Anticheirina) that, despite belonging to two different subtribes, present unique morphological and ecological characters among the 71 genera of these subtribes. My interest is to know the evolutionary affinities between them with emphasis on Chipita and Platyrutela based on morphological and molecular phylogenetic analyses.

  • Sergio Cuamatzi Molina

    Evolution, modularity and ecomorphology of the metathoracic wing in a group of phytophagous beetles with geometric morphometry

    Wings are evolutionary innovations that in insects have favored radiation, colonization of habitats and the exploitation of resources. Being a complex system, it is common for its shape and functionality to be affected by various factors and it is possible to use them as predictors of adaptations to different selective pressures. Furthermore, they have been historically recognized for their value in taxonomy and phylogeny; however, the evolution of wing characters is still largely unexplored. This research examines the evolution of the alar shape (morphological variation, modularity and integration), and its association with diet, flight habits and taxonomy. Wings have been found to exhibit great variation associated with food preferences and habitats, which determine their shape and flight ability. Moreover, the alar form provides taxonomic information.

  • Violeta Rocha Díaz

    Phylogeography of Coleoptera between La Malinche and Iztaccíhuatl-Popocatépetl National Parks: implications for conservation

    This project aims to analyze the diversity and genetic flow in three species of beetles, each with different distribution areas and dispersal capacities, between two natural protected areas, La Malinche and Iztaccíhuatl-Popocatépetl National Parks, both located in the Trans-Mexican Volcanic Belt. The Belt is formed by a set of mountain ranges and volcanoes that cross central Mexico, which is where the country’s largest cities -with their great anthropogenic pressure- are also located. The phylogeographic analyses include the use of tools of population genetics, biogeography, conservation biology, etc., in order to identify priority areas for conservation. It is part of the multidisciplinary and multitaxonomic project "Analysis of functional connectivity between La Malinche and Iztaccíhuatl-Popocatépetl National Parks, and identification of priority areas for conservation".

  • Erik Gutiérrez Meza

    Phylogeny of the genus Orizabus Fairmaire (Coleoptera: Dynastinae: Pentodontini) and its taxonomic implications regarding the classification of the tribe

    The project I am carrying out is a phylogenetic analysis of the New World genus Orizabus Fairmaire made up of 30 species distributed from the southern United States to Panama. This taxon is interesting because its greatest diversity occurs in Mexico (22 species, 18 endemic), and several of its species have undergone vivariance due to altitudinal isolation, resulting in microendemisms in high mountains, such as El Cofre de Perote, Iztaccíhuatl and Popocatépetl, La Malinche, Colima Volcano, and Zempoaltépetl. The purpose of my project is to elucidate the phylogenetic relationships between the species and to infer the possible evolutionary processes and mechanisms in the speciation of the group.

Coleoptera 

Scarabaeoidea

Escarabajos

Evolución

Taxonomía

Sistemática filogenética

Morfometría geométrica

Conservación biológica

Coleoptera 

Scarabaeoidea

Scarab beetles

Evolution

Taxonomy

Phylogenetic Systematics

Geometric Morphometrics

Biological Conservation​

COLLEGE STUDENTS

  • Dioselina Díaz Sánchez

    Functional diversity of the family Melolonthidae in a recovering       deciduous lowland forest site

    In population ecology studies, functional diversity has become a powerful tool to assess the conservation status of an ecosystem, since, unlike traditional studies with taxonomic diversity, functional diversity considers characters that allow species to develop their functions in the environment. For this reason, my thesis focuses on knowing the traits and functional diversity of a beetle community in an agroforestry system on the Oaxacan coast. Topics such as the importance of beetles in agroforestry systems and ecological studies are addressed, comparing the various methods to quantify functional diversity and highlighting their advantages and disadvantages. This is expected to give a holistic view of the implications of these types of studies.

  • Mario Antonio Alvarado Mota

    Morphological diversity and evolution of the pronotal form in a group of phytophagous beetles (Melolonthidae: Anomalini)

    My study group is the Anomalini tribe, a group of beetles considered to be megadiverse and remarkably complex regarding their taxonomy (> 2000 species and 68 genera). They are almost cosmopolitan in distribution, exhibiting fairly uniform, convergent and, in some cases, transitional morphological characters. By means of Geometric Morphometric techniques, I am analyzing the variation in the shape of the pronotum and its value as a discriminator between supraspecific groups (as defined a priori), as well as morphological affinities between taxa and morphological diversity with respect to taxonomy. From the expression and variation patterns in the morphospace, it is possible to accurately recognize various genera with specific forms. However, for the vast majority, as well as at the subtribal level, no differences were found with respect to the average of the shape between groups, which may indicate imprecise boundaries between taxa at different taxonomic levels.

  • Kevin J. Madrigal Ferrer

    Taxonomic problems regarding the classification of Paranomala villosella (Blanchard, 1850) (Coleoptera: Melolonthidae: Rutelinae: Anomalini)

    My thesis project is a taxonomic review with an emphasis on the morphology of Paranomala villosella (Blanchard 1850), which for 160 years has been an unstable taxon within the Anomalini tribe. What is interesting is that the type species (P. villosella) and other species (comprised in another species complex) have been confused since their original descriptions. My work has generated evidence to consider nomenclatural changes at the generic level, with the recognition of a set of differential characters separating the rest of the tribe. In addition, the morphological pattern of edeagus is discussed, as well as the implications regarding affinities with other taxa.

PREVIOUS STUDENTS

THESIS

Salma Jacqueline Gonzáles Fachada. Estudio de la forma del ala metatorácica de un grupo de escarabajos fitófagos mediante técnicas de morfometría geométrica. Instituto Tecnológico del Valle de Oaxaca (Concluida, 25-septiembre-2019).  

Violeta Rocha Días. Diversidad de familias de coleópteros (Insecta) atraídos a trampas Malaisse en bosques de coníferas de piedra canteada, San Felipe Hidalgo, Nanacamilpa, Tlaxcala. Universidad Autónoma de Tlaxcala (Concluida, 20-agosto-2019).

Abraham Mendoza Pérez. Diversidad y distribución altitudinal de coleópteros (Insecta) en Piedra Canteada, Nanacamilpa, Tlaxcala. Licenciatura en Biología, Benemérita Universidad Autónoma de Puebla (Concluida, 18-septiembre-2019).

Erick Gutiérrez Meza. Diversidad de escarabajos lamelicornios del parque nacional La Malinche: conservación y afinidades biogeográficas y ecológicas. Facultad de Agrobiología. Universidad Autónoma de Tlaxcala (Concluida, 24-enero-2019).

Gabriela Garfias Lozano. Patrón alométrico de la expansión cefálica postocular en el género Platyneuromus (Insecta, Megaloptera). Facultad de Ciencias, UNAM (Concluida, ).

Mauricio Daniel Suárez Hernández. Análisis morfométrico de la variación genital en especies de Phyllophaga Harris como respuesta a la competencia por selección sexual (Coleoptera: Melolonthidae: Melolonthini). Licenciatura en Biología. Facultad de Ciencias, UNAM. México (Concluida, ).

Héctor Miguel Guzmán Vásquez. Estudio faunístico de los Coleópteros Lamelicornios (Coleoptera: Scarabaeoidea) de Zaachila, Oaxaca, México. Licenciatura en Biología. Instituto Tecnológico del Valle de Oaxaca (Concluida, ).

RESEARCH STAYS

Dioselina Díaz Sánchez. Diversidad de familias de coleópteros (Insecta) atraídos a trampas Malaisse en bosques de coníferas de piedra canteada, San Felipe Hidalgo, Nanacamilpa, Tlaxcala. Universidad Autónoma de Tlaxcala.

Kevin Jaret Madrigal Ferrer. Diversidad y distribución de escarabajos lamelicornios del centro y sur de México para evaluar afinidades y prioridades de conservación. Universidad Autónoma de Tlaxcala.

Salma Jacqueline Gonzáles Fachada. “Estudio de la forma del ala metatorácica de un grupo de escarabajos fitófagos mediante técnicas de morfometría geométrica”. Instituto Tecnológico del Valle de Oaxaca. 500 horas.

Mario Antonio Alvarado Mota. Diversidad morfológica y evolución de la forma del pronoto en un grupo de escarabajos fitófagos (Melolonthidae: Anomalini). Universidad del Mar. Oaxaca. 

Francisco Acosta González. Insectos asociados a bosques templados. Instituto Tecnológico Superior de Irapuato. 600 horas.

Fernando Díaz Saucedo. Insectos asociados a bosques templados. Instituto Tecnológico Superior de Irapuato. 600 horas.

Antonio de Jesús García Gonzáles. Diferencias morfológicas entre poblaciones de langostino Macrobrachium tenellum en la costa de Oaxaca. Centro Interdisciplinario de Investigación para el Desarrollo Regional Integral – Instituto Politécnico Nacional, Unidad Oaxaca.

Sergio Cuamatzi Molina. Análisis de la variación morfológica de la cabeza en un grupo de escarabajos fitófagos con técnicas de morfometría geométrica. Facultad de Agrobiología. Universidad Autónoma de Tlaxcala (Concluida con 480 hrs.).

Héctor Miguel Guzmán Vásquez. Estudio faunístico de los Coleópteros lamelicornios (Coleoptera: Scarabaeoidea) de Zaachila, Oaxaca, México. Departamento de Ciencias Básicas. Instituto Tecnológico del Valle de Oaxaca. México (Concluida con 500 hrs.).

Violeta Rocha Días. Diversidad de familias de coleópteros (Insecta) atraídos a trampas Malaisse en bosques de coníferas de piedra canteada, San Felipe Hidalgo, Nanacamilpa, Tlaxcala. Universidad Autónoma de Tlaxcala.

Abraham Mendoza Pérez. Insectos Asociados a Bosques Templados (IABTe). Licenciatura en Biología, Benemérita Universidad Autónoma de Puebla.

Mauricio Caramillo. Diversidad y distribución de escarabajos lamelicornios del centro y sur de México para evaluar afinidades biogeográficas y prioridades de conservación. Licenciatura en Biología. Universidad Autónoma de Tlaxcala (Concluida con 480 hrs).

María del Carmen Díaz Ramírez. Diversidad de escarabajos lamelicornios del parque nacional la malinche: conservación y afinidades biogeográficas y ecológicas. Licenciatura en Biología. Universidad Autónoma de Tlaxcala (Concluida con 600 hrs). 

Erick Gutiérrez Meza. Proyecto: Diversidad de escarabajos lamelicornios del parque nacional la malinche: conservación y afinidades biogeográficas y ecológicas. Licenciatura en Biología. Universidad Autónoma de Tlaxcala (Concluida con 600 hrs.).

INSTITUTO DE BIOLOGÍA

UNAM

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UNIVERSIDAD NACIONAL

AUTÓNOMA DE MÉXICO