Advertisement

Mammalian Biology

, Volume 67, Issue 4, pp 233–242 | Cite as

Trinomys mirapitanga, a new species of spiny rat (Rodentia: Echimyidae) from the Brazilian Atlantic Forest

  • Márcia C. LaraEmail author
  • J. L. Patton
  • Erika Hingst-Zaher
Original investigation

Abstract

A new species of spiny rat (genus Trinomys) from Porto Seguro, state of Bahia in the Atlantic Forest of Brazil is described based on skin, skull, and bacular characters and mitochondrial cytochrome b gene sequences. The new species is the sister to T. dimidiatus and T. iheringi which forms a mono-phyletic group together with T. gratiosus. It is diagnosed by having a tail less than head and body length that is covered by short hairs, without a brush of elongated hairs on the tail tip, a round post-orbital process of the zygomatic arch that is formed by both the squamosal and jugal, an oval incisive foramen with a well developed maxillary portion of the septum, and a baculum with well developed basal expansion, a median trough on the dorsal surface and ventral flexion.

Key words

Genus Trinomys spiny rats systematics neotropics new species 

Trinomys mirapitanga, eine neue Art der Stachelratte (Rodentia: Echimyidae) aus dem atlantischen Regenwald in Brasilien

Zusammenfassung

Basierend auf Merkmalen der Haut, des Schädels und des Baculum sowie auf mitochondrialen Cy-tochrom b Sequenzen wird eine neue Art der Stachelratte (Gattung Tn’nomys) aus Porto Seguro im Bundesstaat Bahia im atlantischen Regenwald von Brasilien beschrieben. Die neue Art ist eine Schwesterart von T. dimidiatus und T. iheringi, welche gemeinsam mit T. gratiosus eine monophyle-tische Gruppe bilden. Die Diagnose der neuen Art erfolgt anhand ihres mit kurzen Haaren bedeckten Schwanzes, dessen Länge unter der der Kopf-Rumpf-Länge liegt, und dem ein terminaler Pinsel fehlt. Weitere Kennzeichen sind ein runder post-orbitaler Fortsatz am Jochbein, ein ovales Foramen incisivum mit einem gut entwickelten maxillaren Teil des Septums, und ein Baculum mit einer ausgeprägten basalen Erweiterung sowie einer medianen Furche entlang der dorsalen Oberfläche und einer ventralen Flexion.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. dos Reis, S. F.; Pessôa, L. M. (1995): Proechimys albispinus minor, a new subspecies from the state of Bahia, northeastern Brazil (Rodentia: Echimyidae). Z. Säugetierkunde 60, 237–242.Google Scholar
  2. dos Reis, S. F.; Pessôa, L. M.; Bordin, B. (1992): Cranial phenotypic evolution in Proechimys iheringi Thomas (Rodentia: Echimyidae). Zool. Scr. 21, 201–204.CrossRefGoogle Scholar
  3. Lara, M. C. (1994): Systematics and phylogeography of the spiny rat genus Trinomys (Rodentia: Echimyidae). Diss, thesis, University of California, Berkeley.Google Scholar
  4. Lara, M. C.; Patton, J. L. (2000): Evolutionary diversification of spiny rats (genus Trinomys, Rodentia: Echimyidae) in the Atlantic Forest of Brazil. Zool. J. Linnean Soc. 130, 661–686.CrossRefGoogle Scholar
  5. Lara, M. C.; Patton, J. L.; da Silva, M. N. F. (1996): The simultaneous diversification of South American echimyid rodents (Hystricognathi) based on complete cytochrome b sequences. Mol. Phylogenet. Evol. 5, 403–413.CrossRefGoogle Scholar
  6. Leal-Mesquita, E. R.; Yonenaga-Yassuda, Y.; Chu, T. H.; da Rocha, P. L. B. (1992): Chromosomal characterization and comparative cytogenetic analysis of two species of Proechimys (Echimyidae, Rodentia) from the Caatinga domain of the state of Bahia, Brazil. Caryologia 45, 197–212.CrossRefGoogle Scholar
  7. Leontsinis, A. P. (1992): O Tupi - nossa linguagem ecológica. Rio de Janeiro.Google Scholar
  8. Moojen, J. (1948): Speciation in the Brazilian spiny rats (genus Proechimys, family Echimyidae). Univ. Kansas Pub., Mus. Nat. Hist. 1, 303–401.Google Scholar
  9. Patton, J. L. (1987): Species group of spiny rats, genus Proechimys (Rodentia: Echimyidae). In: Studies in Neotropical Mammalogy: essays in honor of Philip Hershkovitz. Ed. by B. D. Patterson and R. M. Timm. Fieldiana: Zoology, n. s. 39, 305–346.Google Scholar
  10. Patton, J. L.; Rogers, M. A. (1983): Systematic implications of non-geographic variation in the spiny rat genus Proechimys (Echimyidae). Z. Säugetierkunde 48, 363–370.Google Scholar
  11. Pessôa, L. M. (1992): Variação morfológica, taxonomia e sistemática do subgênero Trinomys, gênero Proechimys (Rodentia: Echimyidae). Diss, thesis, Universidade Estatual Paulista, Campus de Rio Claro, São Paulo, Brazil.Google Scholar
  12. Pessôa, L. M.; dos Reis, S. F. (1991): Cranial in-fraespecific differentiation in Proechimys iheringi Thomas (Rodentia: Echimyidae). Z. Säugetierkunde 56, 34–40.Google Scholar
  13. Pessôa, L. M.; dos Reis, S. F. (1992 a): An analysis of morphological discrimination between Proechimys dimidiatus and Proechimys iheringi (Rodentia: Echimyidae). Zool. Anz. 228, 189–200.Google Scholar
  14. Pessôa, L. M.; dos Reis, S. F. (1992 b): Bacular variation in the subgenus Trinomys, genus Proechimys (Rodentia: Echimyidae). Z. Säugetierkunde 57, 100–102.Google Scholar
  15. Pessôa, L. M.; dos Reis, S. F. (1993): A new subspecies of Proechimys iheringi Thomas (Rodentia: Echimyidae) from the state of Rio de Janeiro, Brazil). Z. Säugetierkunde 58, 181–190.Google Scholar
  16. Pessôa, L. M.; dos Reis, S. F. (1994): Systematic implications of craniometric variation in Proechimys iheringi Thomas (Rodentia: Echimyidae). Zool. Anz. 232, 181–200.Google Scholar
  17. Pessôa, L. M.; dos Reis, S. F.; Pessôa, M. F. (1996): Bacular variation in subspecies of the Brazilian spiny rat Proechimys (Trinomys) iheringi. Stud. Neotrop. Fauna and Environm. 31, 129–132.CrossRefGoogle Scholar
  18. Ridgway, R. (1912): Color standards and color nomenclature. Washington.Google Scholar
  19. Rocha, P. L. B. (1995): Proechimys yonenagae, a new species of spiny rat (Rodentia: Echimyidae) from fossil sand dunes in the Brazilian Caatinga. Mammalia 59, 537–549.CrossRefGoogle Scholar
  20. Straney, D. (1990): Median Axis methods in morphometrics. In: Proceedings of the Michigan Morphometrics Workshop. Ed. by F. J. Rohlf and F. Bookstein. Special Publ. 2. Univ. Mich. Mus. Zool.Google Scholar
  21. Thomas, O. (1921): On the spiny rats of the Proechimys group from Southeastern Brazil. Ann. Mag. Nat. Hist., London 8 (ser. 9), 140–143.CrossRefGoogle Scholar
  22. Woods, G.A. (1993): Suborder Hystricognathi. In: Mammal Species of the World: a taxo-nomic and geographic reference. Ed. by D. E. Wilson and D. M. Reeder. Washington D.G: Smithsonian Institute Press. Pp. 771–806.Google Scholar
  23. Yonenaga-Yassuda, Y; de Souza, M. J.; Kasahara, S.; LAbbate, M.; Chu, H. T. (1985): Supernumerary system in Proechimys iheringi iheringi (Rodentia, Echimyidae), from the state of São Paulo, Brazil. Caryologia 38, 179–194.CrossRefGoogle Scholar

Copyright information

© Deutsche Gesellschaft für Säugetierkunde 2002

Authors and Affiliations

  • Márcia C. Lara
    • 1
    Email author
  • J. L. Patton
    • 2
    • 4
  • Erika Hingst-Zaher
    • 3
  1. 1.Museum of Vertebrate ZoologyUniversity of CaliforniaBerkeleyUSA
  2. 2.Department of BiologyBoston UniversityBostonUSA
  3. 3.Seção de MamíferosMuseu de Zoologia da Universidade de São PauloSão PauloBrazil
  4. 4.Museum of Vertebrate ZoologyUniversity of CaliforniaBerkelyUSA

Personalised recommendations