All Stories

  1. New insights into Ituglanis (Siluriformes: Trichomycteridae) diversity in Bahia State, eastern Brazil: Description of a new species and conservation status reappraisal

    Article • Journal of Fish Biology, October 2025, Wiley

    Axel Katz

  2. On the type material of two Heptapteridae species (Siluriformes) originally deposited in a deactivated collection in Brazil

    Article • Zootaxa, September 2025, Magnolia Press

    Axel Katz

  3. A new catfish species of the subgenus Trichomycterus (Siluriformes: Trichomycteridae) from south-eastern Brazilian coastal plains

    Article • Zootaxa, September 2025, Magnolia Press

    Axel Katz

  4. Relationships of a new fossorial Microcambevinae catfish species from southern Brazil supporting multiple dorsal-fin losses in Listrura (Siluriformes, Trichomycteridae)

    Article • Zoosystematics and Evolution, July 2025, Pensoft Publishers

    Axel Katz

  5. Two new species of Trichomycterus (Siluriformes: Trichomycteridae) from the Rio Itabapoana Basin, south-eastern Brazil

    Article • European Journal of Taxonomy, December 2024, Museum National D'Histoire Naturelle

    Axel Katz

  6. Well-intentioned initiatives hinder understanding biodiversity conservation: an essay on a recent deep-learning image classifier for Amazonian fishes

    Article • Reviews in Fish Biology and Fisheries, October 2024, Springer Science + Business Media

    Axel Katz

  7. Top mountain areas of subtropical southern Brazil sheltering four new small-ranged catfishes (Siluriformes, Trichomycteridae): relationships and taxonomy

    Article • Evolutionary Systematics, September 2024, Pensoft Publishers

    Axel Katz

  8. A new species of the Cambeva variegata group (Siluriformes: Trichomycteridae) from the Serra do Espinhaço, south-eastern Brazil, under severe risk of extinction

    Article • Zootaxa, August 2024, Magnolia Press

    Axel Katz

  9. A new rare catfish species from southeastern Brazil provides insights into the origins of similar colour patterns in syntopic, distantly related mountain trichomycterines (Siluriformes, Trichomycteridae)

    Article • Zoosystematics and Evolution, June 2024, Pensoft Publishers

    Axel Katz

  10. Monophyly or Homoplasy? The Relationships of a Rare New Species of Cambeva (Siluriformes: Trichomycteridae) from the Brazilian Atlantic Forest with a Bicolored Caudal Pattern

    Article • Taxonomy, May 2024, MDPI AG

    Axel Katz

  11. A Poorly Known Catfish Clade in an Endangered Neotropical Biodiversity Hotspot: Relationships and Distribution Patterns of the Cambeva variegata Group (Siluriformes: Trichomycteridae)

    Article • Fishes, March 2024, MDPI AG

    Axel Katz

  12. Relationships and description of a new catfish species from Chapada Diamantina, the northernmost record of Trichomycterus s.s. (Siluriformes, Trichomycteridae)

    Article • Zoosystematics and Evolution, March 2024, Pensoft Publishers

    Axel Katz

  13. High Endemism in an Endangered Biodiversity Hotspot: Phylogeny, Taxonomy and Distribution Patterns of Catfishes of the Psammocambeva Alpha-Clade (Siluriformes: Trichomycteridae) from the Rio Doce Basin, Brazil

    Article • Fishes, September 2023, MDPI AG

    Axel Katz

  14. Chromatic polymorphism in Trichomycterus jacupiranga from eastern Brazilian Coastal basins (Siluriformes: Trichomycteridae)

    Article • Zootaxa, May 2023, Magnolia Press

    Axel Katz

  15. Notes on some type specimens of the Natural History Museum of Pirassununga, São Paulo, Brazil

    Article • Zootaxa, May 2023, Magnolia Press

    Axel Katz

  16. Molecular Phylogeny, Taxonomy and Distribution Patterns of Trichomycterine Catfishes in the Middle Rio Grande Drainage, South-Eastern Brazil (Siluriformes: Trichomycteridae)

    Article • Fishes, April 2023, MDPI AG

    Axel Katz

  17. Field studies in small streams of the Atlantic Forest of southern subtropical Brazil reveal two new interstitial microcambevine catfishes of the genus Listrura (Siluriformes: Trichomycteridae)

    Article • Journal of Natural History, March 2023, Taylor & Francis

    Axel Katz

  18. Chromatic polymorphism in Trichomycterus albinotatus (Siluriformes, Trichomycteridae), a mountain catfish from south-eastern Brazil and the role of colouration characters in trichomycterine taxonomy

    Article • Zoosystematics and Evolution, February 2023, Pensoft Publishers

    Axel Katz

  19. Checklist of the fish fauna of the Munim River Basin, Maranhão, north-eastern Brazil

    Article • Biodiversity Data Journal, February 2023, Pensoft Publishers

    Axel Katz

  20. Morpho-Molecular Discordance? Re-Approaching Systematics of Cambeva (Siluriformes: Trichomycteridae) from the Guaratuba-Babitonga-Itapocu Area, Southern Brazil

    Article • Fishes, January 2023, MDPI AG

    Axel Katz

  21. Perils of Underestimating Species Diversity: Revisiting Systematics of Psammocambeva Catfishes (Siluriformes: Trichomycteridae) from the Rio Paraíba do Sul Basin, South-Eastern Brazil

    Article • Taxonomy, December 2022, MDPI AG

    Axel Katz

  22. Species diversity and phylogeography of the Australoheros autrani group (Teleostei, Cichlidae) in eastern Brazil

    Article • Ichthyological Research, September 2022, Springer Science + Business Media

    Axel Katz

  23. Redefinition of Heptapterus (Heptapteridae) and description of Heptapterus carmelitanorum, a new species from the upper Paraná River basin in Brazil

    Article • Zoosystematics and Evolution, September 2022, Pensoft Publishers

    Axel Katz

  24. Phylogenetic relationships of a new catfish of the genus Trichomycterus (Siluriformes, Trichomycteridae) from the Brazilian Cerrado, and the role of Cenozoic events in the diversification of mountain catfishes

    Article • Zoosystematics and Evolution, May 2022, Pensoft Publishers

    Axel Katz

  25. A new catfish species of the genus Cambeva (Siluriformes: Trichomycteridae) from the Rio Iguaçu drainage, southern Brazil, with a remarkable unique colour pattern

    Article • Journal of Fish Biology, May 2022, Wiley

    Axel Katz

  26. An endangered new catfish species of the genus Cambeva (Cambeva gamabelardense n. sp.) (Siluriformes, Trichomycteridae) from the Rio Chapecó drainage, southern Brazil

    Article • Animal Biodiversity and Conservation, April 2022, Consorci del Museu de Ciencies Naturals de Barcelona

    Axel Katz

  27. Phylogenetic position of Trichomycterus astromycterus (Siluriformes: Trichomycteridae), an enigmatic trichomycterid from eastern Brazil, inferred from molecular data

    Article • Journal of Fish Biology, March 2022, Wiley

    Axel Katz

  28. An enigmatic interstitial trichomycterine catfish from south-eastern Brazil found at about 1000 km away from its sister group (Siluriformes: Trichomycteridae)

    Article • Zoologischer Anzeiger, March 2022, Elsevier

    Axel Katz

  29. Two new remarkable and endangered catfish species of the genus Cambeva (Siluriformes, Trichomycteridae) from southern Brazil

    Article • European Journal of Taxonomy, February 2022, Museum National D'Histoire Naturelle

    Axel Katz

  30. A new catfish of the genus Trichomycterus from the Rio Paraíba do Sul Basin, south-eastern Brazil, a supposedly migrating species (Siluriformes, Trichomycteridae)

    Article • Zoosystematics and Evolution, January 2022, Pensoft Publishers

    Axel Katz

  31. A new species of Knodus (Characiformes: Characidae), with deep genetic divergence, from the Mearim and Munim river basins, Northeastern Brazil, and evidence for hidden diversity in adjacent river basins

    Article • Neotropical Ichthyology, January 2022, FapUNIFESP (SciELO)

    Axel Katz

  32. One new Locality for the endangered species Roughback Whipray Fluvitrygon kittipongi (Vidthayanon & Roberts 2005) (Myliobatiformes: Dasyatidae) in Peninsular Malaysia, based on photographs = UMA NOVA LOCALIDADE PARA A ESPÉCIE AMEAÇADA DE EXTINÇÃO A...

    Article • Boletim do Laboratório de Hidrobiologia, December 2021, Universidade Federal do Maranhao

    Axel Katz

  33. Comparative Morphology, Phylogeny, Classification and Evolution of Interstitial Habits in Microcambevine Catfishes (Siluriformes: Trichomycteridae)

    Article • Taxonomy, November 2021, MDPI AG

    Axel Katz

  34. Field inventory reveals high diversity of new species of mountain catfishes, genus Cambeva Katz, Barbosa, Mattos & Costa, 2018 (Siluriformes: Trichomycteridae), in south-eastern Serra Geral, southern Brazil

    Article • Zoosystema, October 2021, Museum National d'Histoire Naturelle, Paris, France

    Axel Katz

  35. A new candiru of the genus Paracanthopoma (Siluriformes: Trichomycteridae) from the Araguaia River basin, central Brazil

    Article • Journal of Fish Biology, October 2021, Wiley

    Axel Katz

  36. Two new catfish species from central Brazil comprising a new clade supported by molecular phylogeny and comparative osteology (Siluriformes: Trichomycteridae)

    Article • Zoologischer Anzeiger, July 2021, Elsevier

    Axel Katz

  37. Integrative taxonomy supports high species diversity of south-eastern Brazilian mountain catfishes of theT. reinhardtigroup (Siluriformes: Trichomycteridae)

    Article • Systematics and Biodiversity, April 2021, Taylor & Francis

    Axel Katz

  38. Filling distribution gaps: Two new species of the catfish genus Cambeva from southern Brazilian Atlantic Forest (Siluriformes, Trichomycteridae)

    Article • Zoosystematics and Evolution, March 2021, Pensoft Publishers

    Axel Katz

  39. Brazilian mangroves at risk

    Article • Biota Neotropica, January 2021, FapUNIFESP (SciELO)

    Axel Katz

  40. Cryptic speciation in populations of the genus Aphyocharax (Characiformes: Characidae) from eastern Amazon coastal river drainages and surroundings revealed by single locus species delimitation methods

    Article • Neotropical Ichthyology, January 2021, FapUNIFESP (SciELO)

    Axel Katz

  41. A new species from subtropical Brazil and evidence of multiple pelvic fin losses in catfishes of the genus Cambeva (Siluriformes, Trichomycteridae)

    Article • Zoosystematics and Evolution, November 2020, Pensoft Publishers

    Axel Katz

  42. Integrative taxonomy reveals two new cryptic species of Hyphessobrycon Durbin, 1908 (Teleostei: Characidae) from the Maracaçumé and middle Tocantins River basins, Eastern Amazon region

    Article • European Journal of Taxonomy, November 2020, Museum National D'Histoire Naturelle

    Axel Katz

  43. Relationships of a new species support multiple origin of melanism in Trichomycterus from the Atlantic Forest of south-eastern Brazil (Siluriformes: Trichomycteridae)

    Article • Zoologischer Anzeiger, July 2020, Elsevier

    Axel Katz

  44. A new species of the catfish genus Cambeva from the Paranapanema river drainage, southeastern Brazil (Siluriformes: Trichomycteridae)

    Article • Tropical Zoology, March 2020, PAGEPress Publications

    Axel Katz

  45. Multigene phylogeny reveals convergent evolution in small interstitial catfishes from the Amazon and Atlantic forests (Siluriformes: Trichomycteridae)

    Article • Zoologica Scripta, January 2020, Wiley

    Axel Katz

  46. Sympatric sister species with divergent morphological features of psammophilic catfishes of the south-eastern Brazilian genus Microcambeva (Siluriformes: Trichomycteridae)

    Article • Zoologischer Anzeiger, January 2020, Elsevier

    Axel Katz

  47. Ichthyofauna of the Mata de Itamacaoca, an urban protected area from the upper Munim River basin, Northern Brazilian Cerrado

    Article • Biota Neotropica, January 2020, FapUNIFESP (SciELO)

    Axel Katz

  48. Historical review and redescription of three poorly known species of the catfish genus Trichomycterus from south-eastern Brazil (Siluriformes: Trichomycteridae)

    Article • Journal of Natural History, December 2019, Taylor & Francis

    Axel Katz

  49. Two new species of miniature psammophilic sarcoglanidine catfishes of the genus Microcambeva from the Atlantic Forest of eastern Brazil (Siluriformes: Trichomycteridae)

    Article • Journal of Natural History, August 2019, Taylor & Francis

    Axel Katz

  50. Phylogeny and species delimitation based on molecular approaches on the species of the Australoheros autrani group (Teleostei, Cichlidae), with biogeographic comments

    Article • Zoosystematics and Evolution, February 2019, Pensoft Publishers

    Axel Katz

  51. Multigene analysis of the catfish genus Trichomycterus and description of a new South American trichomycterine genus (Siluriformes, Trichomycteridae)

    Article • Zoosystematics and Evolution, November 2018, Pensoft Publishers

    Axel Katz

  52. Taxonomic status of Aphyocharax avary Fowler, 1913, Aphyocharax pusillus Günther, 1868 and Chirodon alburnus Günther, 1869 (Characiformes, Characidae)

    Article • Zoosystematics and Evolution, August 2018, Pensoft Publishers

    Axel Katz

  53. Position of enigmatic miniature trichomycterid catfishes inferred from molecular data (Siluriformes)

    Article • Zoologica Scripta, October 2017, Wiley

    Axel Katz

  54. Pisces, Gobiiformes, Gobiidae, Ctenogobius boleosoma (Jordan & Gilbert, 1882): first record for Maranhão state, northeastern Brazil

    Article • Check List, May 2017, Pensoft Publishers

    Axel Katz

  55. Re-description of Trichomycterus cubataonis BIZERRIL, 1994 (Siluriformes: Trichomycteridae) from the Cubatão river basin, southern Brazil

    Article • Vertebrate Zoology, April 2014, Pensoft Publishers

    Axel Katz