Hondonadia

Hondonadia is an extinct genus of Late Eocene to Early Oligocene (Tinguirirican) marsupials related to today's shrew opossums and with similar features as the related Rosendolops. The type species Hondonadia feruglioi was described by Goin and Candela in 1998.[1] In later years, five more species were recognized, of which Pascualdelphys fierroensis, described by Flynn and Wyss in 1999,[2] that was in 2010 synonymized with Hondonadia.[3]

Hondonadia
Temporal range: Late Eocene-Early Oligocene (Tinguirirican)
~36–29 Ma
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Mammalia
Infraclass:
Marsupialia
Order:
Paucituberculata
Suborder:
Bonapartheriiformes
Family:
†Rosendolopidae
Genus:
†Hondonadia

Goin & Candela, 1998
Type species
Hondonadia feruglioi
Goin & Candela, 1998
Species
  • H. feruglioi Goin & Candela 1998
  • H. parca Goin et al. 2010
  • H. pittmanae Goin & Candela 2004
  • H. praecipitia Goin et al. 2010
  • H. pumila Goin et al. 2010
  • H. fierroensis (Flynn & Wyss 1999)
Hondonadia (South America)
Synonyms
  • Pascualdelphys Flynn & Wyss 1999

Description

It was a small animal, with estimates of the body weight of the mammal ranging from 27 to 93.3 grams (0.95 to 3.29 oz). The species H. feruglioi and H. praecipitia were possibly larger. Its main diet probably consisted of seeds rather than insects.[4] The type species Hondonadia feruglioi preserves at least four upper incisors (of which the posteriormost is the smallest), but the presence of five teeth cannot be ruled out. H. feruglioi also preserves a very large, subvertical C1.[5]

Fossil distribution

Fossils of the genus were found in the Tinguiririca fauna of the Abanico Formation of Chile, the Santa Rosa local fauna of the Yahuarango Formation in Amazonian Peru and in the Gran Barranca fauna of the Vera Member pertaining to the Sarmiento Formation in Argentina.[6]

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References
  1. Hondonadia in the Paleobiology Database
  2. Flynn & Wyss, 1999
  3. Goin et al., 2010
  4. Zimicz, 2014, p.111
  5. Beck, 2016, p.20
  6. Hondonadia at Mindat.org

Bibliography
  • Beck, Robin M. 2016. The Skull of Epidolops ameghinoi from the Early Eocene Itaboraí Fauna, Southeastern Brazil, and the Affinities of the Extinct Marsupialiform Order Polydolopimorphia. Journal of Mammalian Evolution 24. 1–43. Accessed 2020-07-30.
  • Zimicz, Natalia. 2014. New Paleogene Marsupials from the Amazon Basin of Eastern Peru. Ameghiniana 51. 106–128. Accessed 2020-07-30.
  • Goin, Francisco Javier; María Alejandra Abello, and Laura Chornogubsky. 2010. Middle Tertiary marsupials from central Patagonia (early Oligocene of Gran Barranca): understanding South America's Grande Coupure in The Paleontology of Gran Barranca. Evolution and Environmental Change Through the Middle Cenozoic of Patagonia, 69–105. .; Cambridge University Press. ISBN 978-0-521-87241-6
  • Goin, F. J., and A. M. Candela. 2004. New Paleogene Marsupials from the Amazon Basin of Eastern Peru. Natural History Museum of Los Angeles County, Science Series 40. 15–60.
  • Flynn, J. J., and A. W. Wyss. 1999. New Marsupials from the Eocene-Oligocene transition of the Andean main range, Chile. Journal of Vertebrate Paleontology 19. 533–549.
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