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  1. By: Ayala, Ricardo - Missouri. Department of Conservation.
    Publication info: Lawrence, Kan, Natural History Museum, University of Kansas, [2002]
    Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
  1. By: Ramírez-Freire, Liliana - Alanís Flores, Glafiro J. - Ayala, Ricardo - Quiroz-Martínez, Humberto - Velazco Macías, Carlos G. (Carlos Gerardo)
    Type: Article
    In: Revista mexicana de biodiversidad
    Date: 2012-03-01
  2. By: Vanoye-Eligio, Maximiliano - Meléndez Ramírez, Virginia - Ayala, Ricardo - Navarro-Alberto, Jorge - Delfín-González, Hugo
    Type: Article
    In: Instituto de Biología
    Date: 2015-01-01
    Publication Info: Instituto de Biología
  3. By: Noguera, Felipe A. (Felipe Arturo) - Zaragoza Caballero, Santiago - Rodríguez-Palafox, Alicia - González-Soriano, Enrique - Ramírez-García, Enrique - Ayala, Ricardo - Ortega-Huerta, Miguel A.
    Type: Article
    In: Revista mexicana de biodiversidad
    Date: 2012-09-01
  4. By: Rodríguez-Velez, Beatriz. - Zaragoza Caballero, Santiago - Noguera, Felipe A. (Felipe Arturo) - González-Soriano, Enrique - Ramírez-García, Enrique - Rodríguez-Palafox, Alicia - Ayala, Ricardo
    Type: Article
    In: Revista mexicana de biodiversidad
    Date: 2011-09-01
  5. By: Ayala, Ricardo - Gonzalez, Victor H. - Engel, Michael S.
    Type: Article
    In: Journal of Hymenoptera Research
    Volume: 92
    Date: 2022
    Page Range: 273--284
    Publication Info: Pensoft Publishers 2022
  6. By: Rodríguez-Velez, Beatriz. - Ayala, Ricardo
    Type: Article
    In: Revista mexicana de biodiversidad
    Date: 2010-04-01
  7. By: Falcón Brindis, Armando - Ayala, Ricardo - Jiménez, María Luisa - Hinojosa-Diaz, Ismael
    Type: Article
    In: ZooKeys
    Volume: 726
    Date: 2018
    Page Range: 15-23
    Publication Info: Pensoft Publishers 2018
  8. By: Bullock, Stephen H. - Ayala, Ricardo - Arreguín-S., María de la Luz
    Type: Article
    In: The Pan-Pacific entomologist
    Volume: 67
    Issue: 3
    Date: 1991
    Page Range: 171--176
    Publication Info: San Francisco, Pacific Coast Entomological Society,
  9. By: Rozen, Jerome G. (Jerome George), - Ayala, Ricardo
    Type: Article
    In: Journal of the New York Entomological Society
    Volume: 95
    Date: 1987
    Page Range: 28--33
    Publication Info: Lawrence, Kan Allen Press [etc.]
  10. By: Bullock, Stephen H. - Ayala, Ricardo - Baker, Irene - Baker, Herbert G.
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 34
    Date: 1987
    Page Range: 304--314
    Publication Info: Berkeley, California Botanical Society,
  11. By: Engel, Michael S. - Rasmussen, Claus, - Ayala, Ricardo - Oliveira, Favízia Freitas de
    Type: Article
    In: ZooKeys
    Volume: 1172
    Date: 2023
    Page Range: 239--312
    Publication Info: Pensoft Publishers 2023
  12. By: Ayala, Ricardo - Griswold, Terry L.
    Type: Article
    In: Revista mexicana de biodiversidad
    Date: 2012-06-01
  13. By: Ayala, Ricardo
    Type: Article
    In: Two new subgenera of bees in the genus Centris (Hymenoptera: Apidae)
    Volume: 25
    Date: 2002-04-10
    Page Range: 1--8
    Publication Info: Lawrence, Kan, Natural History Museum, University of Kansas, [2002]