Phylogeny and Systematics of Wood-Degrading Neotropical Bess Beetles (Coleoptera: Passalidae: Passalinae)
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Evolution of Cooperation in Ambrosia Beetles
Evolution of Cooperation in Ambrosia Beetles Inauguraldissertation der Philosophisch-naturwissenschaftlichen Fakultät der Universität Bern vorgelegt von Peter Hans Wilhelm Biedermann von Trofaiach / Österreich Leiter der Arbeit: Prof. Dr. Michael Taborsky Institut für Ökologie und Evolution Abteilung Verhaltensökologie Universität Bern Evolution of Cooperation in Ambrosia Beetles Inauguraldissertation der Philosophisch-naturwissenschaftlichen Fakultät der Universität Bern vorgelegt von Peter Hans Wilhelm Biedermann von Trofaiach / Österreich Leiter der Arbeit: Prof. Dr. Michael Taborsky Institut für Ökologie und Evolution Abteilung Verhaltensökologie Universität Bern Von der Philosophisch-naturwissenschaftlichen Fakultät angenommen. Der Dekan: Bern, 20. März 2012 Prof. Dr. Silvio Decurtins Supervised by: Prof. Dr. Michael Taborsky Department of Behavioural Ecology Institute of Ecology and Evolution University of Bern Wohlenstrasse 50a CH-3032 Hinterkappelen Switzerland Reviewed by: Prof. Dr. Jacobus J. Boomsma Section for Ecology and Evolution Institute of Biology University of Copenhagen Universitetsparken 15 2100 Copenhagen Denmark Examined by: Prof. Dr. Heinz Richner, University of Bern (Chair) Prof. Dr. Michael Taborsky, University of Bern Prof. Dr. Jacobus J. Boosma, University of Copenhagen Copyright Chapter 1 © PNAS 2011 by the National Academy of Sciences of the United States of America, Washington, USA Chapter 2 © Mitt. Dtsch. Ges. allg. angew. Ent. 2011 by the DGaaE, Müncheberg, Gernany Chapter 4 © Zookeys 2010 by Pensoft Publishers, Sofia, Bulgaria Chapter 5 © Behav. Ecol. & Sociobiol. by Springer-Verlag GmbH, Heidelberg, Germany Chapter 9 © J. Bacteriol. by the American Society for Microbiology, Washington, USA General Introduction, Chapter 3, 6, 7, 8, Appendix 1,2, and Summary & Conclusion © Peter H.W. Biedermann Cover drawing © by Barrett Anthony Klein, Entomoartist, Department of Biology, University of Konstanz, Germany. -
Larval Structure of Passalus Gravelyi and Sexual Dimorphism in Passalid Larvae
Larval structure of Passalus gravelyi and sexual dimorphism in Passalid larvae Ingrid Mattos1,2, José Ricardo Miras Mermudes1,2 & Pedro Reyes-Castillo3 1. Universidade Federal do Rio de Janeiro, Departamento de Zoologia, Laboratório de Entomologia, CEP: 21941-971, Rio de Janeiro, Brazil; [email protected] 2. Programa de Pós-Graduação em Biociências, Universidade do Estado do Rio de Janeiro, Rio de Janeiro – RJ, Brazil; [email protected] 3. Instituto de Ecología A.C., Red de Biodiversidad y Sistemática, Carretera Antigua a Coatepec No. 351, El Haya, 91070 Xalapa, Veracruz, México; [email protected] Received 14-VIII-2014. Corrected 16-III-2015. Accepted 17-IV-2015. Abstract: The adults and larvae of Passalidae are subsocial insects commonly found in tropical forests, living in decaying wood gallery systems constructed by adults. Currently, few repots on the larvae of Neotropical Passalidae have been published and information is scarce. In this study, the Passalus (Pertinax) gravelyi Moreira, 1922 larvae is described for the first time, based on ten larval specimens 1 (1° instar), 4 (2º instar), and 5 (3º instar) associated with three adults collected from a single colony at the Parque Nacional do Itatiaia (Itatiaia, Rio de Janeiro, Brazil). The description was carried out based on electronic and digital photographs of diagnostic structures, with some details on the systematic of the species. The larvae of Passalus gravelyi has the general setal ‘Pertinax’ pattern and differed from others by 16 to 18 setae on the anal ring, the other larvae data from Brazilian species show the anal ring with 10 to 12 setae. -
PASSALIDAE: STATE of LARVAL TAXONOMY with DESCRIPTION of NEW WORLD SPECIES Jack C
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Entomology Papers from Other Sources Entomology Collections, Miscellaneous 9-1992 PASSALIDAE: STATE OF LARVAL TAXONOMY WITH DESCRIPTION OF NEW WORLD SPECIES Jack C. Schuster Universidad del Valle de Guatemala, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/entomologyother Schuster, Jack C., "PASSALIDAE: STATE OF LARVAL TAXONOMY WITH DESCRIPTION OF NEW WORLD SPECIES" (1992). Entomology Papers from Other Sources. 133. http://digitalcommons.unl.edu/entomologyother/133 This Article is brought to you for free and open access by the Entomology Collections, Miscellaneous at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Entomology Papers from Other Sources by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Schuster: Passalid Larval Taxonomy 357 PASSALIDAE: STATE OF LARVAL TAXONOMY WITH DESCRIPTION OF NEW WORLD SPECIES JACK C. SCHUSTER Instituto de Investigaciones Universidad del Valle de Guatemala Apartado 82 Guatemala, GUATEMALA ABSTRACT Larvae of 12 New World species of Passalidae are described and 7 species rede- scribed, bringing the total number of species described to 134 worldwide. A key is provided for all New World genera. Basic setal pattern differences differentiate New World Passalini from Proculini, with the latter tribe showing 2 basic groups of genera. Some exceptions to these basic patterns suggest possible nomenclatural changes. RESUMEN Se describen larvas de 12 especies de Passalidae del Nuevo Mundo y se redescriben 7 mas, dando un total de 134 especies descritas mundialmente. Se presenta una clave para todos los generos del Nuevo Mundo. Diferencias basicas en el patr6n de setas diferencian Passalini del Nuevo Mundo y Proculini, con la ultima tribu mostrando 2 grupos principales de generos. -
PASSALID BEETLE (COLEOPTERA: PASSALIDAE) INHABITANTS of LEAF- CUTTER ANT H( YMENOPTERA: FORMICIDAE) DETRITUS Jack C
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Entomology Papers from Other Sources Entomology Collections, Miscellaneous 3-1984 PASSALID BEETLE (COLEOPTERA: PASSALIDAE) INHABITANTS OF LEAF- CUTTER ANT H( YMENOPTERA: FORMICIDAE) DETRITUS Jack C. Schuster Universidad del Valle de Guatemala, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/entomologyother Schuster, Jack C., "PASSALID BEETLE (COLEOPTERA: PASSALIDAE) INHABITANTS OF LEAF-CUTTER ANT (HYMENOPTERA: FORMICIDAE) DETRITUS" (1984). Entomology Papers from Other Sources. 139. http://digitalcommons.unl.edu/entomologyother/139 This Article is brought to you for free and open access by the Entomology Collections, Miscellaneous at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Entomology Papers from Other Sources by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Scientific Notes 175 SCIENTIFIC NOTES PASSALID BEETLE (COLEOPTERA: PASSALIDAE) INHABITANTS OF LEAF-CUTTER ANT (HYMENOPTERA: FORMICIDAE) DETRI- TUS-This is a summary of what is known concerning the relations be- tween passalid beetles and leaf-cutter ants, including new information I have obtained recently in Guatemala. The microhabitat characteristic of Passalidae is rotting wood (Schuster. 1978. Coleopt. Bull. 32: 21-8). Only 1 species of passalid, Ptichopus angulatus (Percheron),' is commonly found associated with leaf-cutter ants. All life stages have been found, in various parts of Mexico, in the detritus chambers or piles of Atta mexicana Fr. Smith (Hendrichs and Reyes-Castillo. 1963. Ciencia Mex. 22: 101-4; Reyes-Castillo. 1970. Folia Ent. Mex. 20-22: 1-240). This is apparently the primary microhabitat of this species. Though Reyes- Castillo (1970) mentions that adults are occasionally found in rotting wood, larvae and pupae haven't been found in wood. -
Horned Passalus, Odontotaenius Disjunctus (Illiger) (Insecta: Coleoptera: Passalidae: Passalinae)1 Christopher S
EENY 487 Horned passalus, Odontotaenius disjunctus (Illiger) (Insecta: Coleoptera: Passalidae: Passalinae)1 Christopher S. Bibbs, Amanda C. Hodges, and Rebecca W. Baldwin2 Introduction previously are believed not to have migrated or been introduced from Central America (Schuster 1983). Nearly 500 species of Passalidae have been described, mainly in the new world tropics (Arnett et al. 2002). The family Passalidae, commonly known as bess bugs or patent leather beetles, is a member of the superfamily Scarabaeoidae, and has only a few occurring species within the United States (Schuster 1983). The horned passalus or betsy beetle, Odontotaenius disjunctus (Illiger), is a widely distributed, easily recognizable beetle and is the most commonly encountered beetle of Passalidae in the United States, due to its relative monopoly in the North American geography. Previously, Passalus punctiger (Lepeletier) and Passalus punctatostriatus (Percheron) have been reported Figure 1. Lateral view of a horned passalus, Odontotaenius disjunctus as exotic species in the United States, but recent records do Illiger. The shiny black color was responsible for another commonly not indicate a current population of either species (Schuster used name: patent leather beetle. 1983). Species within the family Passalidae, including the Credits: Lyle J. Buss, University of Florida horned passalus, are beneficial decomposers of wood. The Synonymy horned passalus only decomposes decaying wood or logs, Odontotaenius disjunctus has also been formerly known as and it is not a pest of urban structures. Popilius disjunctus (Illiger) and Passalus cornutus (Fabri- Odontotaenius floridanus Schuster, a beetle of close ancestry cius) (Hincks 1951). to O. disjunctus, occurs endemically in a limited area in Horned passalus is the approved Entomological Society of Florida. -
"White Grubs and Their Allies"
WHITE GRUBS AND THEIR ALLIES A Study of North American Scarabaeoid Larvae NUMBER FOUR : ENTOMOLOGY }``` ` .f -' eta STUDIES IN i, BY PAUL O. RITGHER Corvallis, Oregon OREGON STATE UNIVERSITY PRESS .- OREGON STATE MONOGRAPHS STUDIES IN ENTOMOLOGY JoHN D. LATTIN, Consulting Editor NUMBER ONE A Review of the Genus Eucerceris (Hymenoptera: Sphecidae) By HERMAN A. SCULLEN NUMBER TWO The Scolytoidea of the Northwest: Oregon, Washington, Idaho, and British Columbia By W. J. CHAMBERLAIN NUMBER THREE Stonefíies of the Pacific Northwest By STANLEY G. JEWITT, JR. NUMBER FOUR White Grubs and Their Allies By PAUL O. RITCHER © 1966 Oregon State University Press Library of Congress Catalog Card number: 66 -63008 Printed in the United States of America By the Department of Printing, Oregon State University Author's Acknowledgments THE INFORMATION published in this book represents Mrs. Patricia Vaurie, American Museum of Natural work done over the past thirty years while the History ; Bernard Benesh, Sunbright, Tennessee; E. C. writer was on the staffs of the Kentucky Agricul- Cole, University of Tennessee; W. A. Price, the late tural Experiment Station (1936- 1949), North Carolina H. H. Jewett, L. H. Townsend, and other members of State College (1949- 1952), and Oregon State Univer- the Kentucky Department of Entomology and Botany; sity (1952 -1966). I am especially indebted to the Ken- J. D. Lattin, Louis Gentner, and other entomologists at tucky Agricultural Experiment Station for permission Oregon State University; D. Elmo Hardy, University to reproduce much of the material contained in my Ken- of Hawaii ; W. F. Barr of the University of Idaho; tucky Bulletins 401, 442, 467, 471, 476, 477, 506, and Joe Schuh of Klamath Falls, Oregon; Kenneth Fender 537, which have long been out of print. -
Coleoptera) with Corrections to Nomenclature and a Current Classification
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Crossref University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Papers in Entomology Museum, University of Nebraska State November 2006 A REVIEW OF THE FAMILY-GROUP NAMES FOR THE SUPERFAMILY SCARABAEOIDEA (COLEOPTERA) WITH CORRECTIONS TO NOMENCLATURE AND A CURRENT CLASSIFICATION Andrew B. T. Smith University of Nebraska - Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/entomologypapers Part of the Entomology Commons Smith, Andrew B. T., "A REVIEW OF THE FAMILY-GROUP NAMES FOR THE SUPERFAMILY SCARABAEOIDEA (COLEOPTERA) WITH CORRECTIONS TO NOMENCLATURE AND A CURRENT CLASSIFICATION" (2006). Papers in Entomology. 122. https://digitalcommons.unl.edu/entomologypapers/122 This Article is brought to you for free and open access by the Museum, University of Nebraska State at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Papers in Entomology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Coleopterists Society Monograph Number 5:144–204. 2006. AREVIEW OF THE FAMILY-GROUP NAMES FOR THE SUPERFAMILY SCARABAEOIDEA (COLEOPTERA) WITH CORRECTIONS TO NOMENCLATURE AND A CURRENT CLASSIFICATION ANDREW B. T. SMITH Canadian Museum of Nature, P.O. Box 3443, Station D Ottawa, ON K1P 6P4, CANADA [email protected] Abstract For the first time, all family-group names in the superfamily Scarabaeoidea (Coleoptera) are evaluated using the International Code of Zoological Nomenclature to determine their availability and validity. A total of 383 family-group names were found to be available, and all are reviewed to scrutinize the correct spelling, author, date, nomenclatural availability and validity, and current classification status. -
World Catalogue of the Genus-Group Names in Elateridae
A peer-reviewed open-access journal ZooKeys 839: 83–154 (2019)World catalogue of the genus-group names in Elateridae... 83 doi: 10.3897/zookeys.839.33279 CATALOGUE http://zookeys.pensoft.net Launched to accelerate biodiversity research World catalogue of the genus-group names in Elateridae (Insecta, Coleoptera). Part I: Agrypninae, Campyloxeninae, Hemiopinae, Lissominae, Oestodinae, Parablacinae, Physodactylinae, Pityobiinae, Subprotelaterinae, Tetralobinae Robin Kundrata1, Magdalena Kubaczkova1, Alexander S. Prosvirov2, Hume B. Douglas3, Anna Fojtikova1, Cleide Costa4, Yves Bousquet5, Miguel A. Alonso-Zarazaga6, Patrice Bouchard3 1 Department of Zoology, Faculty of Science, Palacky University, 17. listopadu 50, 77146, Olomouc, Czech Republic 2 Department of Entomology, Faculty of Biology, Moscow State University, Leninskie gory 1/12, 119234, Moscow, Russia 3 Canadian National Collection of Insects, Arachnids and Nematodes, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, Ontario, K1A 0C6, Canada 4 Museu de Zoologia, Universidade de São Paulo, Caixa Postal 42.494, CEP 04218-970, São Paulo, SP, Brazil 5 Gatineau, Québec, Canada 6 Depto. de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales (CSIC), C/. José Gutiérrez Abascal, 2, E-28006 Madrid, Spain Corresponding author: Robin Kundrata ([email protected]) Academic editor: Aaron Smith | Received 22 January 2019 | Accepted 11 March 2019 | Published 16 April 2019 http://zoobank.org/74AC93DB-2594-4052-954A-6D78D9DD5F6C Citation: Kundrata R, Kubaczkova M, Prosvirov AS, Douglas HB, Fojtikova A, Costa C, Bousquet Y, Alonso- Zarazaga MA, Bouchard P (2019) World catalogue of the genus-group names in Elateridae (Insecta, Coleoptera). Part I: Agrypninae, Campyloxeninae, Hemiopinae, Lissominae, Oestodinae, Parablacinae, Physodactylinae, Pityobiinae, Subprotelaterinae, Tetralobinae. ZooKeys 839: 83–154. -
Passalidae, Insects Which Live in Decaying Logs - M
TROPICAL BIOLOGY AND CONSERVATION MANAGEMENT – Vol.VII - Passalidae, Insects Which Live in Decaying Logs - M. L. Castillo and P. Reyes-Castillo PASSALIDAE, INSECTS WHICH LIVE IN DECAYING LOGS M. L. Castillo and P. Reyes-Castillo Departamento de Biología de Suelos, Instituto de Ecología, A.C. Xalapa, Ver. México Keywords: Coleoptera, Passalidae, passalid beetles, beetles, rotting logs, decomposing, saproxylophagous, subsocial insects, parental care Contents 1. Introduction 1.1. What are Passalid Beetles? 1.2. How to Recognize Passalid Beetles? 1.3. Where do Passalid Beetles Live? 2. Natural history 2.1. Life Cycle 2.2. Food 2.3. Relationships with Other Organisms 3. Behavior 3.1. Galleries 3. 2. Courtship and Copulation 3. 3. Subsocial Behavior 4. Ecology, general features 4.1. Other Specialized Microhabitats 4.2. Percentage of Decaying Logs Housing Passalid Beetles 4.3. How Many Arboreal Species are Fed on by Passalid Beetles? 4.4. Passalidae Life Strategies in Decaying Logs 4.5. Passalidae and the Succession of Fauna in the Decomposing Trunk 4.6. Ecological Interest 5. Conclusions Acknowledgments Glossary Bibliography Biographical Sketches UNESCO – EOLSS Summary The Passalidae form a group of Coleoptera within the superfamily of Scarabaeoidea, which is found SAMPLEthroughout the tropical and subtropicalCHAPTERS humid regions of the world and is calculated as consisting of almost one thousand species in all. The group is little known, owing to the fact that the majority of the species resides in dead tree trunks and is completely inoffensive. They spend their entire life cycle, from the egg stage until adulthood inside the trunks where the larvae and the adults feed off decomposing wood, making them qualify as saproxylophagous organisms. -
Thematic Area: Conservation of Fungi Moderator: Dr
XVI Congress of Euroepan Mycologists, N. Marmaras, Halkidiki, Greece September 18-23, 2011 Abstracts NAGREF-Forest Research Institute, Vassilika, Thessaloniki, Greece. XVI CEM Organizing Committee Dr. Stephanos Diamandis (chairman, Greece) Dr. Charikleia (Haroula) Perlerou (Greece) Dr. David Minter (UK, ex officio, EMA President) Dr. Tetiana Andrianova (Ukraine, ex officio, EMA Secretary) Dr. Zapi Gonou (Greece, ex officio, EMA Treasurer) Dr. Eva Kapsanaki-Gotsi (University of Athens, Greece) Dr. Thomas Papachristou (Greece, ex officio, Director of the FRI) Dr. Nadia Psurtseva (Russia) Mr. Vasilis Christopoulos (Greece) Mr. George Tziros (Greece) Dr. Eleni Topalidou (Greece) XVI CEM Scientific Advisory Committee Professor Dr. Reinhard Agerer (University of Munich, Germany) Dr. Vladimir Antonin (Moravian Museum, Brno, Czech Republic) Dr. Paul Cannon (CABI & Royal Botanic Gardens, Kew, UK) Dr. Anders Dahlberg (Swedish Species Information Centre, Uppsala, Sweden) Dr. Cvetomir Denchev (Institute of Biodiversity and Ecosystem Research , Bulgarian Academy of Sciences, Bulgaria) Dr. Leo van Griensven (Wageningen University & Research, Netherlands) Dr. Eva Kapsanaki-Gotsi (University of Athens, Greece) Professor Olga Marfenina (Moscow State University, Russia) Dr. Claudia Perini (University of Siena, Italy) Dr. Reinhold Poeder (University of Innsbruck, Austria) Governing Committee of the European Mycological Association (2007-2011) Dr. David Minter President, UK Dr. Stephanos Diamandis Vice-President, Greece Dr. Tetiana Andrianova Secretary, Ukraine Dr. Zacharoula Gonou-Zagou Treasurer, Greece Dr. Izabela Kalucka Membership Secretary, Poland Dr. Ivona Kautmanova Meetings Secretary, Slovakia Dr. Machiel Nordeloos Executive Editor, Netherlands Dr. Beatrice Senn-Irlett Conservation officer, Switzerland Only copy-editing and formatting of abstracts have been done, therefore the authors are fully responsible for the scientific content of their abstracts Abstract Book editors Dr. -
Coleoptera, Passalidae)
Bulletin de la Société entomologique de France, 120 (1), 2015 : 113120. Splitting of the polyphyletic genus Passalus Fabricius, s. auct. I. (Coleoptera, Passalidae) by Stéphane BOUCHER Muséum national d’Histoire Naturelle, Département Systématique & Évolution, Entomologie, C. P. 50, 57 rue Cuvier, F – 75231 Paris cedex 05 <[email protected]> Abstract. – A research on the homologies of various characters of the body and of the complete ectodermic male geni- talia has been made on all the nomenclatural genus-group taxa included in the polyphyletic genus Passalus Fabricius, 1792, of the American tribe Passalini Leach, 1815. This work allows a re-evaluation of the typological systematics. The splitting of Passalus, s. auct., is a requirement for a phylogenetic reality with monophyletic species groups. In this first issue seven genera have a new status: four belong to the “Passalus-Paxillus lineage” and three to the “Pertinax lineage” sensu Boucher (2006). For each genus are given diagnostic characters, the main endemism and a preliminary number of representative species. The 21 synonyms of these genera are identified (on a number of 40 previous sub genera, or “sections”, including synonyms). None of the six subgenera or “sections” of Passalus, s. auct., is maintained in its former acceptance. Genera of the “Passalus lineage” are Passalus Fabricius, 1792 [n. syn.: Neleus Kaup, 1869, Zostero thrix Zang, 1905, Lucilius Kuwert, 1891, Pertinacides Kuwert, 1891, Oeneus Kuwert, 1896, Ptychotrichus Kuwert, 1896, Calidas Kuwert, 1896, Lasioperix Zang, 1905], Toxeutotaenius Kuwert, 1896, n. stat., Scalmus Zang, 1905, n. stat. [n. syn.: Neleurops Kuwert, 1891], Rhagonocerus Kaup, 1871, n. stat. [n. syn.: Macro lobus Zang, 1905, Ninoides Kuwert, 1891, Manlius Kuwert, 1891, Phoronaeosomus Kuwert, 1891, Epiphoroneus Arrow, 1907], Epipleurothrix Zang, 1905, n. -
From Costa Rica, with the Description of Two New Species of Passalus
Available online at www.sciencedirect.com Revista Mexicana de Biodiversidad Revista Mexicana de Biodiversidad 88 (2017) 608–615 www.ib.unam.mx/revista/ Taxonomy and systematics The passalid beetles (Coleoptera: Passalidae) from Costa Rica, with the description of two new species of Passalus Los pasálidos (Coleoptera: Passalidae) de Costa Rica, con la descripción de dos especies nuevas de Passalus a,∗ b c d Larry Jiménez-Ferbans , Pedro Reyes-Castillo , Jack C. Schuster , Cristian Beza-Beza a Grupo de Investigación en Evolución, Sistemática y Ecología Molecular, Universidad del Magdalena, Carrera 32 No 22-08, Apartado postal 2-1-21630, Santa Marta, Colombia b Red de Biodiversidad y Sistemática, Instituto de Ecología, A.C., Carretera antigua a Coatepec 351, El Haya, 91070 Xalapa, Veracruz, Mexico c Universidad del Valle de Guatemala, Apartado postal 82, 01901 Guatemala, Guatemala d Department of Biological Sciences, The University of Memphis, 3700 Walker Av., Memphis, TN 38152, USA Received 6 January 2016; accepted 20 April 2017 Available online 14 August 2017 Abstract Two new endemic, brachypterous species of Passalus (Pertinax) from mid and high montane habitats of the Sierra de Talamanca, Costa Rica, are described and illustrated. Additionally, a checklist for the bess beetle species of Costa Rica is provided. © 2017 Universidad Nacional Autónoma de México, Instituto de Biología. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Keywords: Bess beetles; Diversity; Taxonomy; Brachypterous Resumen Se describen e ilustran 2 especies nuevas endémicas de Passalus (Pertinax) con alas reducidas de mediana y alta montana˜ de la Sierra de Talamanca, Costa Rica.