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] PreꞒ Ꞓ O S D C P T J K Pg N
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
†Eoborus berroi †Eoborus charruanus †Eoborus fusiforme †Eoborus rotundus †Eoborus sanctijosephi
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]