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:
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]

References
  1. Salvador, Rodrigo Brincalepe; de Simone, Luiz Ricardo Lopes (1 June 2012). "New fossil pulmonate snails from the Paleocene of Itaboraí Basin, Brazil (Pulmonata: Cerionidae, Strophocheilidae, Orthalicidae)". Archiv für Molluskenkunde: International Journal of Malacology. 141 (1): 43–50. doi:10.1127/arch.moll/1869-0963/141/043-050. S2CID 88222194.
  2. Klappenbach, M.A.; Olazarri, J. (1986). "Notas sobre Strophocheilidae IV. Eoborus berroi, nueva espécie del Mioceno uruguayo" [Notes on Strophocheilidae IV. Eoborus berroi, a new species from the Uruguayan Miocene]. Comucaciones Paleontológicas del Museo de História Natural de Montevideo (in Spanish). 1: 217–225. OCLC 949711393.
  3. Klappenbach, M.A.; Olazarri, J. (1970). "Notas sobre Strophocheilidae (Moll. Gastr.), III. Eoborus, nuevo género paraespecies fósiles de esta familia sudamericana" [Notes on Strophocheilidae (Moll. Gastr.), III. Eoborus, new genus for fossil species of this South American family]. Archiv für Molluskenkunde (in Spanish). 100 (3/4): 179–182.
  4. Martínez, Sergio; Veroslavsky, Gerardo; Verde, Mariano (12 June 2017). "Primer registro del Paleoceno en el Uruguay: paleosuelos calcáreos fosilíferos en la cuenca de Santa Lucía" [First Paleocene record in Uruguay: fossiliferous calcareous paleosols in the Santa Lucía basin]. Revista Brasileira de Geociências (in Spanish). 27 (3): 292–302.
  5. Salvador, Rodrigo Brincalepe; Simone, Luiz Ricardo Lopes de (2013). "Taxonomic revision of the fossil pulmonate mollusks of Itaboraí Basin (Paleocene), Brazil". Papéis Avulsos de Zoologia. doi:10.1590/S0031-10492013000200001.
  6. Maury, Carlotta Joaquina (1935). "New genera and new species of fossil terrestrial Mollusca from Brazil". American Museum Novitates (764): 1–15. hdl:2246/4568.
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