''Eoborus'' is a

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of medium-sized air-breathing

land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial gastropod mollusks that have shells (those without shells are known as ...

s, terrestrial

pulmonate Pulmonata or pulmonates, is an informal group (previously an order, and before that a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills. The group includ ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

s in the family

Strophocheilidae Strophocheilidae is a taxonomic family of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Acavoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Fossil record The genus '' E ...

. ''Eoborus'' is the oldest fossil record of

, dating from the Middle

Paleocene The Paleocene, ( ) or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), E ...

of Brazil ( Itaboraí Basin) and Uruguay (Santa Lucía Basin). The Brazilian species, alongside '' Eoborus charruanus'' from Uruguay, are the oldest fossil record of the family. The small size and large umbilicus of ''Eoborus'' are its most remarkable characteristics; it is considered primitive in the family

Species

Species within the genus ''Eoborus'' include: * '' Eoborus berroi'' Klappenbach & Olazarri, 1986 - from Uruguay * '' Eoborus charruanus'' (Frenguelli, 1930) - from Uruguay and Argentina - type species of genus * '' Eoborus fusiforme'' Salvador & Simone, 2013 - from Brazil * '' Eoborus rotundus'' Salvador & Simone, 2012 - from Brazil * '' Eoborus sanctijosephi'' (Maury, 1935) - from Brazil Some authors note that two other species, '' Strophocheilus chubutensis'' and '' Strophocheilus hauthali'' could also belong to ''Eoborus''.

References

{{Taxonbar, from=Q5381595 Strophocheilidae Paleocene gastropods Eocene gastropods Oligocene gastropods Miocene gastropods