Senckenberg Research Institute and Natural History Museum Frankfurt




Frogs of the Chiquitano region                                      

Snakes of Bolivia


Phone: +49 (0)69 7542-1234

Bachelor- und Masterarbeiten zu vergeben!

Research interests

I am a herpetologist and field biologist. My main research interests include biodiversity, bioacoustics, evolutionary biology and human wildlife-conflicts. I like to combine different methods to disentangle hidden diversity, and to develop new approaches for monitoring wildlife through time. Frequently asked question: How can we make our Big Field Data smart?

Integrative taxonomy of Neotropical Herpetofauna

By combining different disciplines and methods, such as morphology, bioacoustics and molecular data I search for candidate species and study trait evolution. Of particular interest are the frogs of Bolivia, and how their advertisement calls can be used as a tool for species delimitation. Current taxonomic revisions: Leptodactylus, Dendropsophus, Proceratophrys

Pseudis paradoxaD_meld-mü

Fig. 1: Tadpoles of Pseudis paradoxa, Dendropsophus melanargyreus, and Dermatonotus mülleri (Schulze et al. 2015)

New species

Dendropsophus arndti (Caminer, Míla, Jansen, Fouquet, Venegas, Chávez, Chek & Ron 2017)

Dendropsophus vreami (Caminer, Míla, Jansen, Fouquet, Venegas, Chávez, Chek & Ron 2017)

Hydrolaetare caparu (Jansen, Gonzales &. Köhler 2009)

Scinax villasboasi (Brusquetti, Jansen, Barrio-Amorós, Segalla & Haddad 2014)

Scinax madeirae (removed from synonymy of Scinax fuscomarginatus, Brusquetti, Jansen, Barrio-Amorós, Segalla & Haddad 2014)

Pseudopaludicola ibisoroca (Pansonato, Veiga-Menoncello, Mudrek, Jansen, Reco-Pimentel, Martins & Strüssmann 2017) 

Pseudopaludicola motorzinho (Pansonato, Veiga-Menoncello, Mudrek, Jansen, Reco-Pimentel, Martins & Strüssmann 2017) 

Phalotris sansebastiani (Jansen & Köhler 2008)

Xenopholis werdingorum (Jansen, Gonzales & Köhler 2009)

Inventory and monitoring biodiversity 

At the research station Chiquitos in Bolivia we develop new methods for biodiversity inventories, such as an eDNA-based inventory of frogs, and we conduct monitorings with passive audiorecorders (since 2010) and camera traps (since 2017). The next step will be to develop analyzing methods to convert these big data to smart data in order to  to detect changes in local faunal comunities and to develop action plans for conservation


Fig. 2: The Research station "Chiquitos" (left), and bioacoustic monitoring device nearby (right).

Using camera traps we want to study the human-jaguar conflict on cattle ranches in Bolivia. How abundant is the jaguar and its natural prey at our site? When and why does the jaguar feed on cattle instead of its natural prey? Can we develop anti-predation strategies to manage the conflict at our site?


Fig 3: Recent captures of Panthera onca at the site. 

Recent developments in passive acoustic monitoring and acoustic pattern recognition now enable us to comprehensively record and analyze acoustic events over longer periods of time. In this project I study the calling effort and trait variation of white-lipped frogs (Leptodactylus) during sustained calling over several nights. What is the absolute calling effort, and how do frogs manage their energetic limitations?


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Fig 4: Recording device SongMeter® used for longtime recordings (left), and screenshot of infrared video sequence of Leptodactylus syphax. A 30 second sequence can be seen here


José Luis Aramayo (Santa Cruz, Bolivia)

Dr. Diana Bowler (Leipzig, Germany)

Dr. Camille Desjonquéres (Madrid, Spain)

Dr. Thaís Guedes (São Paulo, Brazil)

Dr. Jörn Köhler (Darmstadt, Germany)

PD Dr. Oliver Krone (IZW, Berlin)

Dr. Diego Llusia (Madrid, Spain)

Prof. Dr. Mike Ryan (Austin, Texas)

Dr. Diego Santana (Campo Grande, Brazil)

Dr. Arne Schulze (Darmstadt, Germany)

Prof. Dr. Christine Strüssmann (Cuiabá, Brazil)

Dr. André Pansonato (Cuiabá, Brazil)

Bachelor- und Masterarbeiten zu vergeben! Hier klicken                                                                                               

Themenbereiche: Biodiversität, Bioakustik, Biomonitoring.

Studenten der Biologie und Bioinformatik, Lehramtsstudenten der Biologie und Mathematik.

Scientific publications (peer-reviewed articles 2007-2018)


Bálint, M., Nowak, C., Márton, O., Pauls, S. U., Wittwer, C., Aramayo B., J. L., Schulze, A.,  Chambert, T., Cocchiararo, B. & Jansen, M. (2018): Accuracy, limitations and cost-efficiency of eDNA-based community structure assessments in tropical frogs. Molecular Ecology Resources. DOI: 10.1111/1755-0998.12934


Köhler, J., Jansen, M., Rodríguez, A., Kok, P. J. R.,  Toledo, L. F., Emmrich, M., Glaw, F., Haddad, C. F. B., Rödel, M.-O., & M. Vences (2017): The use of bioacoustics in anuran taxonomy: theory, terminology, methods and recommendations for best practice. Zootaxa, 4251, 1-124, 2017

Guedes ,T.B., Sawaya RJ, Zizka A, Bérnil RS, Jansen M, Passos P, Prudente ALC, Cisneros-Heredia DF, Braz H, Nogueira CdC. & Antonelli A (2017): Patterns, biases, and prospects in the distribution and diversity of Neotropical snakes. Global Ecol Biogeogr. 2017; 27:14–27.

Caminer, M.A., Milá, B. Jansen, M., Fouquet, A., Venegas, P.J., Chávez, G., Chek, A. & S. R. Ron (2017): Systematics of the Dendropsophus leucophyllatus species complex (Anura: Hylidae): Cryptic diversity and the description of two new species. PLOS ONE | DOI:10.1371/journal.pone.0171785 March 1, 2017


Pansonato, A., A. C. Veiga-Menoncello, J. R. Mudrek, M. Jansen, S. M. Reco-Pimentel, I. A. Martins & C. Strüssmann (2016): Two new species of Pseudopaludicola Miranda-Ribeiro, 1926 (Anura: Leptodactylidae: Leiuperinae) from eastern Bolivia and western Brazil. Herpetologica, 72(3): 235-255.

Jansen, M., A. Masurowa & R. O´Hara (2016): Temporal variation, duty cycle and absolute calling effort during sustained calling of Leptodactylus mystacinus (Anura: Leptodactylidae). Salamandra (in press)

Jansen, M., M. Plath, F. Brusquetti & M. Ryan (2016): Asymmetric frequency shift in advertisement calls of sympatric frogs. Amphibian-Reptilia (online first)


Schulze, A., Jansen, M. & G. Köhler (2015): Tadpole diversity of Bolivia`s lowland anuran communities: molecular identification, morphological characterization, and ecological assignment. Zootaxa 4016(1):1-111.


Gehara, M.,  Crawford, A. J., Orrico, V. G. D., Rodríguez, A., Lötters, S., Fouquet, A., Barrientos, L. S., Brusquetti, F., De la Riva, I., Ernst, R., Urrutia, G. G., Glaw, F.,  Guayasamin, J. M., Hölting, M., Jansen, M., Kok, P. J. R., Kwet, A., Lingnau, R., Lyra, M., Moravec, J., Pombal Jr., J. P., Rojas-Runjaic, F. J. M.,  Schulze, A., Celsa Señaris, J., Solé, M., Rodrigues, M. T., Twomey, E., Haddad, C. F. B., Vences, M. and Köhler J. (2014 ). High levels of diversity uncovered in a widespread nominal taxon: continental phylogeography of the Neotropical tree frog Dendropsophus minutus. 2014. Plos One, 10 September 2014.

Brusquetti, F., Jansen, M., C. Barrio-Amorós, Magno Segalla & C. F. B. Haddad (2014): Taxonomic review of Scinax fuscomarginatus (Lutz, 1925) and related species (Anura; Hylidae). Zoological Journal of the Linnean Society, 171, 4: 783-821

Jansen, M. & Schulze: Molecular, morphology and bioacoustic data suggest Bolivian distribution of a large species of the Leptodactylus pentadactylus group (Amphibia: Anura: Leptodactylidae). Zootaxa 3307: 35-47.

Schulze, A. & M. Jansen: One species, two strategies? Oviposition site variation in a member of the Leptodactylus pentadctylus group (Amphibia: Anura: Leptodactylidae) Studies on Neotropical Fauna and Environment, DOI:10.1080/01650521.2012.711102

Jansen, M. R. Bloch, A. Schulze & M. Pfenninger: Integrative inventory of Bolivia’s lowland frogs reveals hidden diversity. Zoologica Scripta 40(6): 567-583.

Schulze, A. & M. Jansen: A tadpole of Trachycephalus venulosus (Anura: Hylidae) as prey for a fishing spider (Araneae: Pisauridae) in the Bolivian Chiquitano Dry Forest. Herpetology Notes 3: 297-298.

Jansen, M. & G. Köhler: Reptilia, Squamata, Amphisbaenidae, Amphisbaena cegei Montero, 1997, and Reptilia, Squamata, Teidae, Tupinambis rufescens (Günther, 1871): vertical range extension. CheckList 6(4): 503-504.

Mebs, D., M. Jansen, G. Köhler, W. Pogoda & G. Kauert: Myrmecophagy and alkaloid sequestration in amphibians: A study on Dendrobatidae (Ameerega picta) and Microhylidae (Elachistocleis sp.) frogs. Salamandra 46(1): 11-15.

Jansen, M., A. Schulze, L. Werding & B. Streit: Effects of extreme drought in the dry season on an anuran community in the Bolivian Chiquitano region. Salamandra 45(4): 233-238.

Jansen, M., L. Gonzales & G. Köhler: Description of a new species of Xenopholis (Serpentes: Colubridae) from the Cerrado of Bolivia with comments on Xenopholis scalaris in Bolivia. Zootaxa 2222: 31-45.

Jansen, M.: Measuring temporal variation in calling intensity of a frog chorus with a  data logging sound level meter: A case study in Bolivia. Herpetology Notes 2: 143-149.

Schulze, A., Jansen, M. & G. Köhler: Diversity and ecology of an anuran community in San Sebastián, Bolivia. Salamandra 45(2):75-90.

Jansen, M.: New and noteworthy records of snakes from Bolivia. Herpetological Review 39(3): 374-375.

Jansen, M & G. Köhler: A new species of Phalotris (Reptilia, Squamata, Colubridae) from the eastern lowlands of Bolivia. Senckenbergiana biologica 88: 103-110.

Jansen, M & J. Köhler: Intraspecific combat behavior of Phyllomedusa boliviana (Anura: Hylidae) and the possible origin of visual signaling in nocturnal treefrogs. Herpetological Review 39(3): 290-293.

Jansen, M., L. Gonzales & G. Köhler: New species of Hydrolaetare (Anura: Leptodactylidae) from Bolivia with some notes on its natural history. Journal of Herpetology 41(4): 724-732.

Jansen, M & J. Köhler: Description of the advertisement call of Eleutherodactylus fraudator. South American Journal of Herpetology 2(3): 198-200.