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Issue: Vol. 5717 No. 3: 6 Nov. 2025
Type: Article
Published: 2025-11-06
DOI: 10.11646/zootaxa.5717.3.1
Page range: 301-317
Abstract views: 175
PDF downloaded: 64

Two new African hinged terrapins (Testudines: Pelomedusidae: Pelusios)

Department of Biology and Wildlife Diseases, FVHE, University of Veterinary Sciences Brno, Palackého 1946/1, 612 42 Brno, Czech Republic.
Department of Biology and Wildlife Diseases, FVHE, University of Veterinary Sciences Brno, Palackého 1946/1, 612 42 Brno, Czech Republic.
Museum of Zoology, Senckenberg Dresden, A. B. Meyer Building, 01109 Dresden, Germany.
Museum of Zoology, Senckenberg Dresden, A. B. Meyer Building, 01109 Dresden, Germany.
Museum of Zoology, Senckenberg Dresden, A. B. Meyer Building, 01109 Dresden, Germany; Institute of Biology, University of Leipzig, Talstraße 33, 04103 Leipzig, Germany.
Democratic Republic of the Congo Pelusios hyneki hyneki sp. et subp. nov. Pelusios hyneki tanganyika subsp. nov. Pelusios subniger Tanzania Reptilia

Abstract

The African hinged terrapin genus Pelusios currently contains 17 recognized species. We describe an additional new species with two subspecies from the Democratic Republic of the Congo and Tanzania. According to phylogenetic analyses of mitochondrial DNA, the new species is closely related to P. subniger, whereas three nuclear loci (C-mos, RAG2, R35) suggest a closer relationship to P. bechuanicus and P. upembae. Morphologically, the new species resembles in plastral shape P. subniger, but differs in plastral coloration in having a diffuse dark plastral pattern instead of the blotched pattern of P. subniger. The two subspecies of the new species are characterized by distinct mitochondrial clades and private alleles in the nuclear RAG2 and R35 loci. According to an examination of museum specimens and photographic records, the new species occurs largely west of the Rift Valley, while P. subniger is distributed east of the Rift Valley. Museum specimens and iNaturalist records suggest that the two species could occur sympatrically in central Tanzania. Furthermore, we found no evidence for any genetic distinctness of P. subniger from the Seychelles, supporting that the subspecies from there is invalid.

References

  1. Bonnaterre, [P.J.] (1789) Tableau encyclopédique et méthodique des trois règes de la nature. Erpétologie. Panckoucke, Paris, xxviii + 71 pp., pls. 1–35 + A, 4 (index) pp. https://doi.org/10.5962/bhl.title.59326
  2. Bour, R. (1979) Les tortues actuelles de Madagascar (République malgache): liste systématique et description de deux sous-espèces nouvelles (Reptilia – Testudines). Bulletin de la Société d’Études scientifiques d’Angers, 1978, 141–154.
  3. Bour, R. (1982) Pelomedusa subrufa (Lacepède, 1788), Pelusios subniger (Lacepède, 1788) (Reptilia, Chelonii) et le séjour de Philibert Commerson à Madagascar. Bulletin du Muséum national d’Histoire naturelle, Paris, 4e Série, 4, Section A, 3–4, 531–539. https://doi.org/10.5962/p.286053
  4. Boycott, R.C. (2014) Family Pelomedusidae, genus Pelomedusa Wagler, 1830 – marsh terrapins, genus Pelusios Wagler, 1830 – hinged terrapins. In: Bates, M.F., Branch, W.R., Bauer, A.M., Burger, M., Marais, J., Alexander, G.J. & de Villiers, M.S. (Eds.), Atlas and Red List of the Reptiles of South Africa, Lesotho and Swaziland. South African National Biodiversity Institute, Pretoria, pp. 53–55.
  5. Branch, B. [W.R.] (2008) Tortoises, Terrapins & Turtles of Africa. Struik, Cape Town, 128 pp.
  6. Broadley, D.G. (1981) A review of the genus Pelusios Wagler in southern Africa (Pleurodira: Pelomedusidae). Occasional Papers of the National Museums and Monuments, Series B (Natural Sciences), 6 (9), 633–686.
  7. Darriba, D., Posada, D., Kozlov, A.M., Stamatakis, A., Morel, B. & Flouri, T. (2020) ModelTest-NG: A new and scalable tool for the selection of DNA and protein evolutionary models. Molecular Biology and Evolution, 37 (1), 291–294. https://doi.org/10.1093/molbev/msz189
  8. Edgar, R.C. (2004) MUSCLE: Multiple sequence alignment with high accuracy and high throughput. Nucleic Acids Research, 32 (5), 1792–1797. https://doi.org/10.1093/nar/gkh340
  9. Flouri, T., Izquierdo-Carrasco, F., Darriba, D., Aberer, A.J., Nguyen, L.-T., Minh, B.Q., von Haeseler, A. & Stamatakis, A. (2015) The phylogenetic likelihood library. Systematic Biology, 64 (2), 356–362. https://doi.org/10.1093/sysbio/syu084
  10. Fritz, U. (1995) Zur innerartlichen Variabilität von Emys orbicularis (Linnaeus, 1758). 5a. Taxonomie in Mittel-Westeuropa, auf Korsika, Sardinien, der Apenninen-Halbinsel und Sizilien und Unterartengruppen von E. orbicularis (Reptilia: Testudines: Emydidae). Zoologische Abhandlungen, 48 (13), 185–242.
  11. Fritz, U., Branch, W.R., Gehring, P.-S., Harvey, J., Kindler, C., Meyer, L., Du Preez, L., Široký, P., Vieites, D.R. & Vences, M. (2013) Weak divergence among African, Malagasy and Seychellois hinged terrapins (Pelusios castanoides, P. subniger) and evidence for human-mediated oversea dispersal. Organisms Diversity & Evolution, 13 (2), 215–224. https://doi.org/10.1007/s13127-012-0113-3
  12. Fritz, U., Branch, W.R., Hofmeyr, M.D., Maran, J., Prokop, H., Schleicher, A., Široký, P., Stuckas, H., Vargas-Ramírez, M., Vences, M. & Hundsdörfer, A.K. (2011) Molecular phylogeny of African hinged and helmeted terrapins (Testudines: Pelomedusidae: Pelusios and Pelomedusa). Zoologica Scripta, 40 (2), 115–125. https://doi.org/10.1111/j.1463-6409.2010.00464.x
  13. Fritz, U., Herrmann, H.-W., Rosen, P.C., Auer, M., Vargas-Ramírez, M. & Kehlmaier, C. (2024) Trachemys in Mexico and beyond: Beautiful turtles, taxonomic nightmare, and a mitochondrial poltergeist (Testudines: Emydidae). Vertebrate Zoology, 74, 435–452. https://doi.org/10.3897/vz.74.e125958
  14. Fritz, U., Vargas-Ramírez, M. & Široký, P. (2012) Phylogenetic position of Pelusios williamsi and a critique of current GenBank procedures (Reptilia: Testudines: Pelomedusidae). Amphibia-Reptilia, 33 (1), 150–154. https://doi.org/10.1163/156853812X627204
  15. Huson, D.H. & Bryant, D. (2006) Application of phylogenetic networks in evolutionary studies. Molecular Biology and Evolution, 23 (2), 254–267. https://doi.org/10.1093/molbev/msj030
  16. Hurtado-Gómez, J.P., Vargas-Ramírez, M., Iverson, J.B., Joyce, W.G., McCranie, J.R., Paetzold, C. & Fritz, U. (2024) Diversity and biogeography of South American mud turtles elucidated by multilocus DNA sequencing (Testudines: Kinosternidae). Molecular Phylogenetics and Evolution, 197, 108083. https://doi.org/10.1016/j.ympev.2024.108083
  17. ICZN [International Commission on Zoological Nomenclature] (1987) De Lacépède, 1788–1789, Histoire Naturelle des Serpens and later editions: Rejected as a binominal work. Bulletin of Zoological Nomenclature, 44 (4), 265–267.
  18. Iverson, J.B. & Lewis, E.L. (2018) How to measure a turtle. Herpetological Review, 49 (3), 453–360.
  19. Kearse, M., Moir, R., Wilson, A., Stones-Havas, S., Cheung, M., Sturrock, S., Buxton, S., Cooper, A., Markowitz, S., Duran, C., Thierer, T., Ashton, B., Meintjes, P. & Drummond, A. (2012) Geneious Basic: An integrated and extendable desktop software platform for the organization and analysis of sequence data. Bioinformatics, 28 (12), 1647–1649. https://doi.org/10.1093/bioinformatics/bts199
  20. Kehlmaier, C., Fritz, U. & Kuchling, G. (2024) Show me your true face: How many Emydura species occur in the Mitchell River Drainage, Kimberley, Australia? Salamandra, 60 (1), 51–59.
  21. Kehlmaier, C., Fritz, U. & Kuchling, G. (2025) The taxonomic quagmire of northern Australian snake-necked turtles (Testudines: Chelidae): Chelodina kuchlingi—Extinct or hiding in plain sight? Vertebrate Zoology, 75, 127–145. https://doi.org/10.3897/vz.75.e150370
  22. Kehlmaier, C., Zhang, X., Georges, A., Campbell, P.D., Thomson, S. & Fritz, U. (2019) Mitogenomics of historical type specimens of Australasian turtles: Clarification of taxonomic confusion and old mitochondrial introgression. Scientific Reports, 9, 5841. https://doi.org/10.1038/s41598-019-42310-x
  23. Kindler, C. & Fritz, U. (2018) Phylogeography and taxonomy of the barred grass snake (Natrix helvetica), with a discussion of the subspecies category in zoology. Vertebrate Zoology, 68 (3), 269–281. https://doi.org/10.3897/vz.68.e31615
  24. Kindler, C., Moosig, M., Branch, W.R., Harvey, J., Kehlmaier, C., Nagy, Z.T., Prokop, H., Široký, P. & Fritz, U. (2016) Comparative phylogeographies of six species of hinged terrapins (Pelusios sp.) reveal discordant patterns and unexpected differentiation in the P. castaneus/P. chapini complex and P. rhodesianus. Biological Journal of the Linnean Society, 117 (2), 305–321. https://doi.org/10.1111/bij.12647
  25. Kozlov, A.M., Darriba, D., Flouri, T., Morel, B. & Stamatakis, A. (2019) RAxML-NG: A fast, scalable and user-friendly tool for maximum likelihood phylogenetic inference. Bioinformatics, 35 (21), 4453–4455. https://doi.org/10.1093/bioinformatics/btz305
  26. Petzold, A., Vargas-Ramírez, M., Kehlmaier, C., Vamberger, M., Branch, W.R., Du Preez, L., Hofmeyr, M.D., Meyer, L., Schleicher, A., Široký, P. & Fritz, U. (2014) A revision of African helmeted terrapins (Testudines: Pelomedusidae: Pelomedusa), with descriptions of six new species. Zootaxa, 3795 (5), 523–548. https://doi.org/10.11646/zootaxa.3795.5.2
  27. Rambaut, A., Drummond, A.J., Xie, D., Baele, G. & Suchard, M.A. (2018) Posterior summarization in Bayesian phylogenetics using Tracer 1.7. Systematic Biology, 67 (5), 901–904. https://doi.org/10.1093/sysbio/syy032
  28. Ronquist, F., Teslenko, M., van der Mark, P., Ayres, D.L., Darling, A., Höhna, S., Larget, B., Liu, L., Suchard, M.A. & Huelsenbeck, J.P. (2012) MrBayes 3.2: Efficient Bayesian phylogenetic inference and model choice across a large model space. Systematic Biology, 61 (1), 539–542. https://doi.org/10.1093/sysbio/sys029
  29. Sternfeld, [R.] & Nieden, [F.] (1911) Zoologische Ergebnisse der Expedition des Herrn Hauptmann a. D. Fromm 1908/1909 nach Deutsch-Ostafrika. Mitteilungen aus dem Zoologischen Museum in Berlin, 5 (3), 383–385.
  30. Stuckas, H., Gemel, R. & Fritz, U. (2013) One extinct turtle species less: Pelusios seychellensis is not extinct, it never existed. PLoS One, 8 (4), e57116. https://doi.org/10.1371/journal.pone.0057116
  31. TTWG [Turtle Taxonomy Working Group] (2017) Turtles of the world. Annotated checklist and atlas of taxonomy, synonymy, distribution, and conservation status (8th ed.). Chelonian Research Monographs, 7, 1–292. https://doi.org/10.3854/crm.7.checklist.atlas.v8.2017
  32. TTWG [Turtle Taxonomy Working Group] (2021) Turtles of the world. Annotated checklist and atlas of taxonomy, synonymy, distribution, and conservation status (9th ed.). Chelonian Research Monographs, 8, 1–472. https://doi.org/10.3854/crm.8.checklist.atlas.v9.2021
  33. TTWG [Turtle Taxonomy Working Group] (2025) Turtles of the world. Annotated checklist and atlas of taxonomy, synonymy, distribution, and conservation status (10th ed.). Chelonian Research Monographs, 10, 1–575. https://doi.org/10.3854/crm.10.checklist.atlas.v10.2025
  34. Vamberger, M., Hofmeyr, M.D., Cook, C.A., Netherlands, E.C. & Fritz, U. (2019) Phylogeography of the East African serrated hinged terrapin Pelusios sinuatus (Smith, 1838) and resurrection of Sternothaerus bottegi Boulenger, 1895 as a subspecies of P. sinuatus. Amphibian & Reptile Conservation, 13 (2), e184, 42–56.
  35. Vences, M., Patmanidis, S., Schmidt, J.-C., Matschiner, M., Miralles, A. & Renner, S.S. (2024) Hapsolutely: A user-friendly tool integrating haplotype phasing, network construction, and haploweb calculation. Bioinformatics Advances, 4 (1), vbae083. https://doi.org/10.1093/bioadv/vbae083

How to Cite

Široký, P., Bilbija, B., Paetzold, C., Kehlmaier, C. & Fritz, U. (2025) Two new African hinged terrapins (Testudines: Pelomedusidae: Pelusios). Zootaxa, 5717 (3), 301–317. https://doi.org/10.11646/zootaxa.5717.3.1