Eoborus

Eoborus is a fossil genus of medium-sized air-breathing land snails, terrestrial pulmonate gastropods in the family Strophocheilidae. Eoborus is the oldest fossil record of Strophocheilidae, dating from the Middle Paleocene of Brazil (Itaboraí Basin)[1] and Uruguay (Santa Lucía Basin).[4] The Brazilian species, alongside Eoborus charruanus from Uruguay, are the oldest fossil record of the family.[1]

Eoborus
Temporal range: Paleocene–Miocene[1][2]
apertural view of Eoborus sanctijosephi
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra
Superfamily:
Acavoidea
Family:
Strophocheilidae
Subfamily:
Megalobuliminae
Genus:
†Eoborus

Klappenbach & Olazarri, 1970[3]
Type species
†Eoborus charruanus
(Frenguelli, 1930)
Species
Diversity
5 extinct species

The small size and large umbilicus of Eoborus are its most remarkable characteristics; it is considered primitive in the family Strophocheilidae.[1][3]

Species

Species within the genus Eoborus include:

  • †Eoborus berroi Klappenbach & Olazarri, 1986[2] - from Uruguay
  • †Eoborus charruanus (Frenguelli, 1930) - from Uruguay and Argentina - type species of genus
  • †Eoborus fusiforme Salvador & Simone, 2013[5] - from Brazil
  • †Eoborus rotundus Salvador & Simone, 2012[1] - from Brazil
  • †Eoborus sanctijosephi (Maury, 1935)[6] - from Brazil

Some authors note that two other species, Strophocheilus chubutensis and Strophocheilus hauthali could also belong to Eoborus.[3][4]

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References
  1. Salvador, R.B. & Simone, L.R.L. 2012. New fossil pulmonate snails from the Paleocene of Itaboraí Basin, Brazil (Pulmonata: Cerionidae, Strophocheilidae, Orthalicidae). Archiv für Molluskenkunde 141(1): 43-50. doi:10.1127/arch.moll/1869-0963/141/043-050
  2. Klappenbach,M.A. & Olazarri, J. 1986. Notas sobre Strophocheilidae IV. Eoborus berroi, nueva espécie del Mioceno uruguayo. Comucaciones Paleontológicas del Museo de História Natural de Montevideo 1: 217-225.
  3. Klappenbach,M.A. & Olazarri, J. 1970. Notas sobre Strophocheilidae (Moll. Gastr.), III. Eoborus, nuevo género paraespecies fósiles de esta familia sudamericana. Archiv für Molluskenkunde 100(3/4): 179-182.
  4. Martínez, S.; Veroslavsky, G.; Verde, M. 1997. Primer registro del Paleoceno en el Uruguay - paleosuelos calcareos fosiliferos en la Cuenca de Santa Lucía. Revista Brasileira de Geociências 27(3): 295-302.
  5. Salvador, R.B. & Simone, L.R.L. Taxonomic revision of the fossil pulmonate mollusks of Itaboraí Basin (Paleocene), Brazil. Papéis Avulsos de Zoologia 53(2): 5-46. (http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0031-10492013000200001&lng=en&nrm=iso&tlng=en)
  6. Maury, C.J. 1935. New genera and new species of fossil terrestrial Mollusca from Brazil. American Museum Novitates 764: 1–15. PDF.
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