Seven Rivers [Guys Hill Mbr, Chapelton Fm] (Eocene of Jamaica)

Where: Jamaica (18.3° N, 77.9° W: paleocoordinates 16.8° N, 77.3° W)

• outcrop-level geographic resolution

When: Guys Hill Member (Chapelton Formation), Lutetian (47.8 - 41.3 Ma)

• said to be "late early to early middle Eocene"

• member-level stratigraphic resolution

Environment/lithology: estuary or bay; calcareous sandstone and siltstone

• member is predominantly sandstone"estuarine/deltaic depositional environment"
• clays, siltstones, and fine- to medium-grained sandstones with some units gypsiferous or containing calcareous nodules

Size class: macrofossils

Collection methods: not clear if invertebrates were collected

Primary reference: D. P. Domning, R. J. Emry, R. W. Portell, S. K. Donovan, and K. S. Schindler. 1997. Oldest West Indian land mammal: rhinocerotoid ungulate from the Eocene of Jamaica. Journal of Vertebrate Paleontology 17(4):638-641 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5241: authorized by John Alroy, entered by John Alroy on 03.09.1999, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

• plants, crocodilians, turtles, and "a lizard" also present
 Foraminiferida -
"Foraminiferida indet." = Foraminifera2
"Foraminiferida indet." = Foraminifera2 d'Orbigny 1826 foram
Crustacea
  -
Crustacea indet.2 Brünnich 1772
unclassified
  -
Mollusca indet.2 Linnaeus 1758
Bivalvia
 Pectinida - Anomiidae
Carolia sp. Cantraine 1838 scallop
"abundant"; other bivalves not discussed
Gastropoda
 Ptenoglossa - Vasidae
Eovasum sp. Douvillé 1920 snail
 Stromboidea - Strombidae
Terebellum sp. Röding 1798 true conch
 Sorbeoconcha - Campanilidae
Campanile sp. Fischer 1884 snail
 Neritoidea - Neritidae
Velates sp. Montfort 1810 snail
Gnathostomata
  -
Osteichthyes indet. bony fish
"fish"
Reptilia
 Crocodylia - Crocodylidae
? Charactosuchus kugleri2 von Berg 1969 crocodile
 Squamata - Polychrotidae
? Polychrotidae indet.2 Macey et al. 1997 squamates
Mammalia
 Sirenia - Prorastomidae
Pezosiren portelli n. gen. n. sp.1
Pezosiren portelli n. gen. n. sp.1 Domning 2001 sirenian
"seacows related to Prorastomus"
 Perissodactyla - Hyrachyidae
"Hyrachyus aff. affinis" = Hyrachyus modestus2
"Hyrachyus aff. affinis" = Hyrachyus modestus2 Leidy 1870 odd-toed ungulate
Asteroidea
  -
Asteroidea indet.2 de Blainville 1830 sea star
Echinoidea
  -
Echinoidea indet.2 Leske 1778 sea urchin
unclassified
  -
Plantae indet.2 Haeckel 1866